Release v2.276.1

* Update ldd check with dotnet 5.

* Runner v2.276.0 fixes (#928)

* Revert "always use Fips Cryptography (#896)"

3b34e203dc

* Revert "Update ldd check with dotnet 5."

4b6ded0a01

* Revert "Update SDK to .NET 5 (#799)"

fc3ca9bb92

* Update dotnet-install scripts

* prep 2.276.1 runner release (#929)

Co-authored-by: Tingluo Huang <huangtingluo@gmail.com>

.github/workflows/build.yml

@@ -1,9 +1,10 @@
 name: Runner CI
 
 on:
+  workflow_dispatch:
   push:
     branches:
-    - master
+    - main
     - releases/*
     paths-ignore:
     - '**.md'    

.github/workflows/codeql.yml

@@ -2,6 +2,7 @@ name: "Code Scanning - Action"
 
 on:
   push:
+  pull_request:
   schedule:
     - cron: '0 0 * * 0'
 

.github/workflows/e2etest.yml

@@ -0,0 +1,335 @@
+name: Runner E2E Test
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+    - main
+    - releases/*
+
+jobs:
+  init:
+    name: Initialize workflow ☕
+    runs-on: ubuntu-latest
+    outputs:
+      unique_runner_label: ${{steps.generator.outputs.runner_label}}
+    steps:
+    - name: Delete all runners
+      uses: actions/github-script@v3
+      with:
+        debug: true
+        script: |
+          var runnersResp = await github.actions.listSelfHostedRunnersForRepo({
+              owner: 'actions',
+              repo: 'runner',
+              per_page: '100'
+          });
+          for(var i=0; i<runnersResp.data.total_count; i++){
+            core.debug(JSON.stringify(runnersResp.data.runners[i]))
+            await github.actions.deleteSelfHostedRunnerFromRepo({
+              owner: 'actions',
+              repo: 'runner',
+              runner_id: runnersResp.data.runners[i].id
+            });
+          }
+        github-token: ${{secrets.PAT}}
+    - name: Generate Unique Runner label
+      id: generator
+      run: |
+        label=$(openssl rand -hex 16)
+        echo ::set-output name=runner_label::$label
+
+  build:
+    name: Build runner packages 🏗 📦
+    strategy:
+      matrix:
+        runtime: [ linux-x64, linux-arm64, linux-arm, win-x64, osx-x64 ]
+        include:
+        - runtime: linux-x64
+          os: ubuntu-latest
+          devScript: ./dev.sh
+
+        - runtime: linux-arm64
+          os: ubuntu-latest
+          devScript: ./dev.sh
+
+        - runtime: linux-arm
+          os: ubuntu-latest
+          devScript: ./dev.sh
+
+        - runtime: osx-x64
+          os: macOS-latest
+          devScript: ./dev.sh
+
+        - runtime: win-x64
+          os: windows-latest
+          devScript: ./dev
+
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v1
+
+    # Build runner layout
+    - name: Build & Layout Release
+      run: |
+        ${{ matrix.devScript }} layout Release ${{ matrix.runtime }}
+      working-directory: src
+    
+    # Create runner package tar.gz/zip
+    - name: Package Release
+      run: |
+         ${{ matrix.devScript }} package Release ${{ matrix.runtime }}
+      working-directory: src
+
+    # Upload runner package tar.gz/zip as artifact
+    - name: Publish Artifact
+      uses: actions/upload-artifact@v1
+      with:
+        name: runner-package-${{ matrix.runtime }}
+        path: _package
+
+  dispatch_workflow:
+    name: Dispatch workflow to runners 🚨
+    needs: [init, build]
+    runs-on: ubuntu-latest
+    steps:
+    - name: Dispatch workflow
+      timeout-minutes: 10
+      uses: actions/github-script@v3
+      with:
+        debug: true
+        script: |
+          function sleep(ms) { return new Promise(resolve => setTimeout(resolve, ms)); }
+          async function dispatchWorkflow(runner) {
+            await github.actions.createWorkflowDispatch({
+              owner: 'actions',
+              repo: 'runner',
+              workflow_id: 'runner-basic-e2e-test-case.yml',
+              ref: 'main',
+              inputs: {target_runner: runner}
+            });
+          }
+          var runWin64 = false, runLinux64 = false, runOsx64 = false, runLinuxARM64 = false;
+          while (true) {
+            core.info(`------------- Waiting for runners to be configured --------------`)
+            await sleep(10000);
+            var runnersResp = await github.actions.listSelfHostedRunnersForRepo({owner: 'actions', repo: 'runner', per_page: '100'});
+            for (var i = 0; i < runnersResp.data.total_count; i++) {
+              core.debug(JSON.stringify(runnersResp.data.runners[i]))
+              var labels = runnersResp.data.runners[i].labels;
+              for (var j = 0; j < labels.length; j++) {
+                core.debug(`Comparing: ${labels[j].name} to win-x64/linux-x64/osx-x64/linux-arm64-${{ needs.init.outputs.unique_runner_label }}`)
+                if (labels[j].name == 'win-x64-${{needs.init.outputs.unique_runner_label}}' && runWin64 == false) {
+                  core.info(`------------------- Windows runner is configured, queue Windows Run -------------------------`)
+                  runWin64 = true;
+                  await dispatchWorkflow('win-x64-${{needs.init.outputs.unique_runner_label}}');
+                  break;
+                } else if (labels[j].name == 'linux-x64-${{needs.init.outputs.unique_runner_label}}' && runLinux64 == false) {
+                  core.info(`------------------- Linux runner is configured, queue Linux Run -------------------------`)
+                  runLinux64 = true;
+                  await dispatchWorkflow('linux-x64-${{needs.init.outputs.unique_runner_label}}');
+                  break;
+                } else if (labels[j].name == 'osx-x64-${{needs.init.outputs.unique_runner_label}}' && runOsx64 == false) {
+                  core.info(`------------------- macOS runner is configured, queue macOS Run -------------------------`)
+                  runOsx64 = true;
+                  await dispatchWorkflow('osx-x64-${{needs.init.outputs.unique_runner_label}}');
+                  break;
+                } else if (labels[j].name == 'linux-arm64-${{needs.init.outputs.unique_runner_label}}' && runLinuxARM64 == false) {
+                  core.info(`------------------- Linux ARM64 runner is configured, queue Linux ARM64 Run-------------------------`)
+                  runLinuxARM64 = true;
+                  await dispatchWorkflow('linux-arm64-${{needs.init.outputs.unique_runner_label}}');
+                  break;
+                }
+              }
+            }
+            if (runWin64 && runLinux64 && runOsx64 && runLinuxARM64) {
+              core.info(`--------------------- ALL runner are running jobs --------------------------`)
+              break;
+            } else {
+              core.info(`---------- Windows running: ${runWin64} -- Linux running: ${runLinux64} -- macOS running: ${runOsx64} -- Linux ARM64 running: ${runLinuxARM64} -----------`)
+            }
+          }
+        github-token: ${{secrets.PAT}}
+
+  LinuxE2E:
+    needs: [build, init]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Runner
+        uses: actions/download-artifact@v2
+        with:
+          name: runner-package-linux-x64
+      - name: Unzip Runner Package
+        run: |
+          tar -xzf *.tar.gz
+      - name: Configure Runner
+        env:
+          unique_runner_name: linux-x64-${{needs.init.outputs.unique_runner_label}}
+        run: |
+          ./config.sh --url ${{github.event.repository.html_url}} --unattended --name $unique_runner_name --pat ${{secrets.PAT}} --labels $unique_runner_name --replace
+      - name: Start Runner and Wait for Job
+        timeout-minutes: 5
+        run: |
+          ./run.sh --once
+      - name: Remove Runner
+        if: always()
+        continue-on-error: true
+        run: |
+          ./config.sh remove --pat ${{secrets.PAT}}
+      - name: Upload Runner Logs
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: linux_x64_logs
+          path: _diag
+  macOSE2E:
+    needs: [build, init]
+    runs-on: macos-latest
+    steps:
+      - name: Download Runner
+        uses: actions/download-artifact@v2
+        with:
+          name: runner-package-osx-x64
+      - name: Unzip Runner Package
+        run: |
+          tar -xzf *.tar.gz
+      - name: Configure Runner
+        env:
+          unique_runner_name: osx-x64-${{needs.init.outputs.unique_runner_label}}
+        run: |
+          ./config.sh --url ${{github.event.repository.html_url}} --unattended --name $unique_runner_name --pat ${{secrets.PAT}} --labels $unique_runner_name --replace
+      - name: Start Runner and Wait for Job
+        timeout-minutes: 5
+        run: |
+          ./run.sh --once
+      - name: Remove Runner
+        if: always()
+        continue-on-error: true
+        run: |
+          ./config.sh remove --pat ${{secrets.PAT}}
+      - name: Upload Runner Logs
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: osx_x64_logs
+          path: _diag
+
+  ARM64E2E:
+    needs: [build, init]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download Runner
+        uses: actions/download-artifact@v2
+        with:
+          name: runner-package-linux-arm64
+      - name: Unzip Runner Package
+        run: |
+          tar -xzf *.tar.gz
+      - name: Prepare QEMU
+        run: |
+          docker run --rm --privileged multiarch/qemu-user-static:register --reset
+      - name: Configure Runner
+        uses: docker://multiarch/ubuntu-core:arm64-bionic
+        with:
+          args: 'bash -c "apt-get update && apt-get install -y curl && ./bin/installdependencies.sh && ./config.sh --unattended --name $unique_runner_name --url ${{github.event.repository.html_url}} --pat ${{secrets.PAT}} --labels $unique_runner_name  --replace"'
+        env:
+          RUNNER_ALLOW_RUNASROOT: 1
+          unique_runner_name: linux-arm64-${{needs.init.outputs.unique_runner_label}}
+
+      - name: Start Runner and Wait for Job
+        timeout-minutes: 5
+        uses: docker://multiarch/ubuntu-core:arm64-bionic
+        with:
+          args: 'bash -c "apt-get update && apt-get install -y curl git && ./bin/installdependencies.sh && ./run.sh --once"'
+        env:
+          RUNNER_ALLOW_RUNASROOT: 1
+
+      - name: Remove Runner
+        if: always()
+        continue-on-error: true
+        uses: docker://multiarch/ubuntu-core:arm64-bionic
+        with:
+          args: 'bash -c "apt-get update && apt-get install -y curl && ./bin/installdependencies.sh && ./config.sh remove --pat ${{secrets.PAT}}"'
+        env:
+          RUNNER_ALLOW_RUNASROOT: 1
+
+      - name: Upload Runner Logs
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: linux_arm64_logs
+          path: _diag
+
+  WindowsE2E:
+    needs: [build, init]
+    runs-on: windows-latest
+    steps:
+      - name: Download Runner
+        uses: actions/download-artifact@v2
+        with:
+          name: runner-package-win-x64
+      - name: Unzip Runner Package
+        run: |
+          Get-ChildItem *.zip | Expand-Archive -DestinationPath $PWD
+      - name: Configure Runner
+        shell: cmd
+        run: |
+          config.cmd --unattended --url ${{github.event.repository.html_url}} --name %unique_runner_name% --pat ${{secrets.PAT}} --labels %unique_runner_name% --replace
+        env:
+          unique_runner_name: win-x64-${{needs.init.outputs.unique_runner_label}}
+
+      - name: Start Runner and Wait for Job
+        shell: cmd
+        timeout-minutes: 5
+        run: |
+          run.cmd --once
+      - name: Remove Runner
+        shell: cmd
+        if: always()
+        continue-on-error: true
+        run: |
+          config.cmd remove --pat ${{secrets.PAT}}
+      - name: Upload Runner Logs
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: win_x64_logs
+          path: _diag
+  
+  check:
+    name: Check runner logs 🕵️‍♂️
+    needs: [WindowsE2E, LinuxE2E, macOSE2E, ARM64E2E]
+    runs-on: ubuntu-latest
+    steps:
+    - name: Download Linux Runner Logs
+      uses: actions/download-artifact@v2
+      with:
+        name: linux_x64_logs
+        path: linux_x64_logs
+    - name: Download macOS Runner Logs
+      uses: actions/download-artifact@v2
+      with:
+        name: osx_x64_logs
+        path: osx_x64_logs
+    - name: Download Linux ARM64 Runner Logs
+      uses: actions/download-artifact@v2
+      with:
+        name: linux_arm64_logs
+        path: linux_arm64_logs
+    - name: Download Windows Runner Logs
+      uses: actions/download-artifact@v2
+      with:
+        name: win_x64_logs
+        path: win_x64_logs
+    - name: Check Runner Logs
+      run: |
+        function failed()
+        {
+            local error=${1:-Undefined error}
+            echo "Failed: $error" >&2
+            exit 1
+        }
+        grep -R "completed with result: Succeeded" ./win_x64_logs || failed "Windows Runner fail to run the job, please check logs"
+        grep -R "completed with result: Succeeded" ./linux_x64_logs || failed "Linux Runner fail to run the job, please check logs"
+        grep -R "completed with result: Succeeded" ./osx_x64_logs || failed "macOS Runner fail to run the job, please check logs"
+        grep -R "completed with result: Succeeded" ./linux_arm64_logs || failed "Linux ARM64 Runner fail to run the job, please check logs"

.github/workflows/release.yml

@@ -1,13 +1,14 @@
 name: Runner CD
 
 on:
+  workflow_dispatch:
   push:
     paths:
     - releaseVersion
   
 jobs:
   check:
-    if: startsWith(github.ref, 'refs/heads/releases/') || github.ref == 'refs/heads/master'
+    if: startsWith(github.ref, 'refs/heads/releases/') || github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2

.github/workflows/runner-basic-e2e-test-case.yml

@@ -0,0 +1,31 @@
+name: Runner Basics Test Case
+
+on:
+  workflow_dispatch:
+    inputs: 
+      target_runner:
+        description: 'Self-hosted runner will run the job'
+        required: true
+
+jobs:
+  test:
+    runs-on:
+    - self-hosted
+    - ${{github.event.inputs.target_runner}}
+
+    name: Runner Basic Test 🛠
+    steps:
+    - uses: actions/checkout@v2
+    - name: Run a one-line script
+      run: echo Hello, world!
+    - name: Run a multi-line script
+      shell: bash
+      run: |
+        printenv|sort
+        cat $GITHUB_EVENT_PATH
+    - name: Validate GitHub Context
+      shell: bash
+      run: |
+        declare -a context_vars=("GITHUB_ACTION" "GITHUB_ACTIONS" "GITHUB_REPOSITORY" "GITHUB_WORKSPACE" "GITHUB_SHA" "GITHUB_RUN_ID" "GITHUB_RUN_NUMBER")
+        for var in ${context_vars[@]};
+        do [ -z "${!var}" ] && echo "##[error]$var not found" && exit 1 || echo "$var: ${!var}"; done

CODEOWNERS

@@ -0,0 +1 @@
+* @actions/actions-runtime

README.md

@@ -5,8 +5,9 @@
 # GitHub Actions Runner
 
 [![Actions Status](https://github.com/actions/runner/workflows/Runner%20CI/badge.svg)](https://github.com/actions/runner/actions)
+[![Runner E2E Test](https://github.com/actions/runner/workflows/Runner%20E2E%20Test/badge.svg)](https://github.com/actions/runner/actions)
 
-The runner is the application that runs a job from a GitHub Actions workflow.  The runner can run on the [hosted machine pools](https://github.com/actions/virtual-environments) or run on [self-hosted environments](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/about-self-hosted-runners).
+The runner is the application that runs a job from a GitHub Actions workflow. It is used by GitHub Actions in the [hosted virtual environments](https://github.com/actions/virtual-environments), or you can [self-host the runner](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/about-self-hosted-runners) in your own environment.
 
 ## Get Started
 

docs/adrs/0263-proxy-support.md

@@ -22,7 +22,7 @@ These are described in detail below:
   - http://proxy.com
   - http://127.0.0.1:8080
   - http://user:password@proxy.com
-- `no_proxy` a comma seperated list of hosts that should not use the proxy. An optional port may be specified
+- `no_proxy` a comma separated list of hosts that should not use the proxy. An optional port may be specified
   - `google.com`
   - `yahoo.com:443`
   - `google.com,bing.com`
@@ -31,9 +31,9 @@ We won't use `http_proxy` for https traffic when `https_proxy` is not set, this
 Otherwise action authors and workflow users need to adjust to differences between the runner proxy convention, and tools used by their actions and scripts.  
 
 Example:  
-  Customer set `http_proxy=http://127.0.0.1:8888` and configure the runner against `https://github.com/owner/repo`, with the `https_proxy` -> `http_proxy` fallback, the runner will connect to server without any problem. However, if user runs `git push` to `https://github.com/owner/repo`, `git` won't use the proxy since it require `https_proxy` to be set for any https traffic.
+  Customer set `http_proxy=http://127.0.0.1:8888` and configure the runner against `https://github.com/owner/repo`, with the `https_proxy` -> `http_proxy` fallback, the runner will connect to the server without any problem. However, if a user runs `git push` to `https://github.com/owner/repo`, `git` won't use the proxy since it requires `https_proxy` to be set for any https traffic.
 
-> `golang`, `node.js` and other dev tools from the linux community use `http_proxy` for both http and https traffic base on my research.
+> `golang`, `node.js` and other dev tools from the linux community use `http_proxy` for both http and https traffic based on my research.
 
 A majority of our users are using Linux where these variables are commonly required to be set by various programs. By reading these values, we simplify the process for self hosted runners to set up proxy, and expose it in a way users are already familiar with.
 
@@ -43,7 +43,7 @@ We will support the lowercase and uppercase variants, with lowercase taking prio
 
 ### No Proxy Format
 
-While exact implementations are different per application on handle `no_proxy` env, most applications accept a comma separated list of hosts. Some accept wildcard characters (*). We are going to do exact case-insentive matches, and not support wildcards at this time.
+While exact implementations are different per application on handle `no_proxy` env, most applications accept a comma separated list of hosts. Some accept wildcard characters (*). We are going to do exact case-insensitive matches, and not support wildcards at this time.
 For example:
 - example.com will match example.com, foo.example.com, foo.bar.example.com
 - foo.example.com will match bar.foo.example.com and foo.example.com
@@ -57,5 +57,5 @@ We will not support IP addresses for `no_proxy`, only hostnames.
 3. The runner will read from the environmental variables during config and runtime and use the provided proxy if it exists
 4. Users may need to pass these environmental variables into other applications if they do not natively take these variables
 5. Action authors may need to update their workflows to react to the these environment variables
-6. We will document the way of setting environmental variables for runners using the environmental variables and how the runner uses them
+6. We will document the way of setting environmental variables for runners using the environment variables and how the runner uses them
-7. Like all other secrets, users will be able to relatively easily figure out proxy password if they can modify a workflow file running on a self hosted machine
+7. Like all other secrets, users will be able to relatively easily figure out proxy password if they can modify a workflow file running on a self hosted machine

docs/adrs/0276-problem-matchers.md

@@ -34,7 +34,7 @@ A way out for rare cases where scoping is a problem.
 
 `##[remove-matcher]owner`
 
-For the this to be usable, the `owner` needs to be discoverable. Therefore, debug print the owner on registration.
+For this to be usable, the `owner` needs to be discoverable. Therefore, debug print the owner on registration.
 
 ### Single line matcher
 
@@ -184,7 +184,7 @@ Solving this problem means:
   - Use the `github.workspace` (where the repo is cloned on disk)
 - Match against a repository to determine the relative path within the repo
 
-This is a place where we diverge from VSCode. VSCode task configuration are specific to the local workspace (workspace root is known or can be specified). We're solving a more generic problem, so we need more information - specifically the `fromPath` property - in order to accurately root the path.
+This is a place where we diverge from VSCode. VSCode task configurations are specific to the local workspace (workspace root is known or can be specified). We're solving a more generic problem, so we need more information - specifically the `fromPath` property - in order to accurately root the path.
 
 In order to avoid creating inaccurate hyperlinks on the error issues, the agent will verify the file exists and is in the main repository. Otherwise omit the file property from the error issue and debug trace what happened.
 
@@ -203,7 +203,7 @@ Problem matchers are unable to interpret severity strings other than `warning` a
 
 However some tools indicate error/warning in different ways. For example `flake8` uses codes like `E100`, `W200`, and `F300` (error, warning, fatal, respectively).
 
-Therefore, allow a property `severity`, sibling to `owner`, which identifies the default severity for the problem matcher. This allows two problem matchers are registered - one for warnings and one for errors.
+Therefore, allow a property `severity`, sibling to `owner`, which identifies the default severity for the problem matcher. This allows two problem matchers to be registered - one for warnings and one for errors.
 
 For example, given the following `flake8` output:
 

docs/adrs/0277-run-action-shell-options.md

@@ -84,7 +84,7 @@ powershell/pwsh
 - Users can always opt out by not using the builtins, and providing a shell option like: `pwsh -File {0}`, or `powershell -Command "& '{0}'"`, depending on need
 
 cmd
-- There doesnt seem to be a way to fully opt in to fail-fast behavior other than writing your script to check each error code and respond accordingly, so we cant actually provide that behavior by default, it will be completely up to the user to write this behavior into their script
+- There doesn't seem to be a way to fully opt in to fail-fast behavior other than writing your script to check each error code and respond accordingly, so we can't actually provide that behavior by default, it will be completely up to the user to write this behavior into their script
 - cmd.exe will exit (return the error code to the runner) with the errorlevel of the last program it executed. This is internally consistent with the previous default behavior (sh, pwsh) and is the cmd.exe default, so we keep that behavior
 
 ## Consequences

docs/adrs/0549-composite-run-steps.md

@@ -0,0 +1,378 @@
+# ADR 0549: Composite Run Steps
+
+**Date**: 2020-06-17
+
+**Status**: Accepted
+
+## Context
+
+Customers want to be able to compose actions from actions (ex: https://github.com/actions/runner/issues/438)
+
+An important step towards meeting this goal is to build in functionality for actions where users can simply execute any number of steps. 
+
+### Guiding Principles
+
+We don't want the workflow author to need to know how the internal workings of the action work. Users shouldn't know the internal workings of the composite action (for example, `default.shell` and `default.workingDir` should not be inherited from the workflow file to the action file). When deciding how to design certain parts of composite run steps, we want to think one logical step from the consumer.
+
+A composite action is treated as **one** individual job step (this is known as encapsulation).
+
+## Decision
+
+**In this ADR, we only support running multiple run steps in an Action.** In doing so, we build in support for mapping and flowing the inputs, outputs, and env variables (ex: All nested steps should have access to its parents' input variables and nested steps can overwrite the input variables).
+
+### Composite Run Steps Features
+This feature supports at the top action level:
+- name
+- description
+- inputs
+- runs
+- outputs
+
+This feature supports at the run step level:
+- name
+- id
+- run
+- env
+- shell
+- working-directory
+
+This feature **does not support** at the run step level:
+- timeout-minutes
+- secrets
+- conditionals (needs, if, etc.)
+- continue-on-error
+
+### Steps
+
+Example `workflow.yml`
+
+```yaml
+jobs:
+  build:
+    runs-on: self-hosted
+    steps:
+    - id: step1
+      uses: actions/setup-python@v1
+    - id: step2
+      uses: actions/setup-node@v2
+    - uses: actions/checkout@v2
+    - uses: user/composite@v1
+    - name: workflow step 1
+      run: echo hello world 3
+    - name: workflow step 2
+      run: echo hello world 4
+```
+
+Example `user/composite/action.yml`
+
+```yaml
+runs:
+  using: "composite"
+  steps:
+    - run: pip install -r requirements.txt
+      shell: bash
+    - run: npm install
+      shell: bash
+```
+
+Example Output
+
+```yaml
+[npm installation output]
+[pip requirements output]
+echo hello world 3
+echo hello world 4
+```
+
+We add a token called "composite" which allows our Runner code to process composite actions. By invoking "using: composite", our Runner code then processes the "steps" attribute, converts this template code to a list of steps, and finally runs each run step sequentially. If any step fails and there are no `if` conditions defined, the whole composite action job fails. 
+
+### Defaults
+
+We will not support "defaults" in a composite action. 
+
+### Shell and Working-directory
+
+For each run step in a composite action, the action author can set the `shell` and `working-directory` attributes for that step. The shell attribute is **required** for each run step because the action author does not know what the workflow author is using for the operating system so we need to explicitly prevent unknown behavior by making sure that each run step has an explicit shell **set by the action author.** On the other hand, `working-directory` is optional. Moreover, the composite action author can map in values from the `inputs` for it's `shell` and `working-directory` attributes at the step level for an action. 
+
+For example,
+
+`action.yml`
+
+
+```yaml
+inputs:
+  shell_1:
+    description: 'Your name'
+    default: 'pwsh'
+steps:
+  - run: echo 1
+    shell: ${{ inputs.shell_1 }}
+```
+
+Note, the workflow file and action file are treated as separate entities. **So, the workflow `defaults` will never change the `shell` and `working-directory` value in the run steps in a composite action.** Note, `defaults` in a workflow only apply to run steps not "uses" steps (steps that use an action).
+
+### Running Local Scripts
+
+Example 'workflow.yml':
+```yaml
+jobs:
+  build:
+    runs-on: self-hosted
+    steps:
+    - uses: user/composite@v1
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+runs:
+  using: "composite"
+  steps: 
+    - run: chmod +x ${{ github.action_path }}/test/script2.sh
+      shell: bash
+    - run: chmod +x $GITHUB_ACTION_PATH/script.sh
+      shell: bash
+    - run: ${{ github.action_path }}/test/script2.sh
+      shell: bash
+    - run: $GITHUB_ACTION_PATH/script.sh
+      shell: bash
+```
+Where `user/composite` has the file structure:
+```
+.
++-- action.yml
++-- script.sh
++-- test
+|   +-- script2.sh
+```
+
+
+Users will be able to run scripts located in their action folder by first prepending the relative path and script name with `$GITHUB_ACTION_PATH` or `github.action_path` which contains the path in which the composite action is downloaded to and where those "files" live. Note, you'll have to use `chmod` before running each script if you do not git check in your script files into your github repo with the executable bit turned on.
+
+### Inputs
+
+Example `workflow.yml`:
+
+```yaml
+steps: 
+  - id: foo
+    uses: user/composite@v1
+    with:
+      your_name: "Octocat"
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+inputs:
+  your_name:
+    description: 'Your name'
+    default: 'Ethan'
+runs:
+  using: "composite"
+  steps: 
+    - run: echo hello ${{ inputs.your_name }}
+      shell: bash
+```
+
+Example Output:
+
+```
+hello Octocat
+```
+
+Each input variable in the composite action is only viewable in its own scope.
+
+### Outputs
+
+Example `workflow.yml`:
+
+```yaml
+...
+steps: 
+  - id: foo
+    uses: user/composite@v1
+  - run: echo random-number ${{ steps.foo.outputs.random-number }} 
+    shell: bash
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+outputs:
+  random-number: 
+    description: "Random number"
+    value: ${{ steps.random-number-generator.outputs.random-id }}
+runs:
+  using: "composite"
+  steps: 
+    - id: random-number-generator
+      run: echo "::set-output name=random-id::$(echo $RANDOM)"
+      shell: bash
+```
+
+Example Output:
+
+```
+::set-output name=my-output::43243
+random-number 43243
+```
+
+Each of the output variables from the composite action is viewable from the workflow file that uses the composite action. In other words, every child action output(s) is viewable only by its parent using dot notation (ex `steps.foo.outputs.random-number`).
+
+Moreover, the output ids are only accessible within the scope where it was defined. Note that in the example above, in our `workflow.yml` file, it should not have access to output id (i.e. `random-id`). The reason why we are doing this is because we don't want to require the workflow author to know the internal workings of the composite action.
+
+### Context
+
+Similar to the workflow file, the composite action has access to the [same context objects](https://help.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#contexts) (ex: `github`, `env`, `strategy`). 
+
+### Environment
+
+In the Composite Action, you'll only be able to use `::set-env::` to set environment variables just like you could with other actions.
+
+### Secrets
+
+**We will not support "Secrets" in a composite action for now. This functionality will be focused on in a future ADR.**
+
+We'll pass the secrets from the composite action's parents (ex: the workflow file) to the composite action. Secrets can be created in the composite action with the secrets context. In the actions yaml, we'll automatically mask the secret. 
+
+
+### If Condition
+
+** If and needs conditions will not be supported in the composite run steps feature. It will be supported later on in a new feature. **
+
+Old reasoning:
+
+Example `workflow.yml`:
+
+```yaml
+steps:
+  - run: exit 1
+  - uses: user/composite@v1  # <--- this will run, as it's marked as always runing
+    if: always()
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+runs:
+  using: "composite"
+  steps:
+    - run: echo "just succeeding"
+      shell: bash
+    - run: echo "I will run, as my current scope is succeeding"
+      shell: bash
+      if: success()
+    - run: exit 1
+      shell: bash
+    - run: echo "I will not run, as my current scope is now failing"
+      shell: bash
+```
+
+**We will not support "if Condition" in a composite action for now. This functionality will be focused on in a future ADR.**
+
+See the paragraph below for a rudimentary approach (thank you to @cybojenix for the idea, example, and explanation for this approach):
+
+The `if` statement in the parent (in the example above, this is the `workflow.yml`) shows whether or not we should run the composite action. So, our composite action will run since the `if` condition for running the composite action is `always()`.
+
+**Note that the if condition on the parent does not propagate to the rest of its children though.**
+
+In the child action (in this example, this is the `action.yml`), it starts with a clean slate (in other words, no imposing if conditions). Similar to the logic in the paragraph above, `echo "I will run, as my current scope is succeeding"` will run since the `if` condition checks if the previous steps **within this composite action** has not failed. `run: echo "I will not run, as my current scope is now failing"` will not run since the previous step resulted in an error and by default, the if expression is set to `success()` if the if condition is not set for a step.
+
+
+What if a step has `cancelled()`? We do the opposite of our approach above if `cancelled()` is used for any of our composite run steps. We will cancel any step that has this condition if the workflow is cancelled at all.
+    
+### Timeout-minutes
+
+Example `workflow.yml`:
+
+```yaml
+steps: 
+  - id: bar
+    uses: user/test@v1
+    timeout-minutes: 50
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+runs:
+  using: "composite"
+  steps: 
+    - id: foo1
+      run: echo test 1
+      timeout-minutes: 10
+      shell: bash
+    - id: foo2
+      run: echo test 2
+      shell: bash
+    - id: foo3
+      run: echo test 3
+      timeout-minutes: 10
+      shell: bash
+```
+
+**We will not support "timeout-minutes" in a composite action for now. This functionality will be focused on in a future ADR.**
+
+A composite action in its entirety is a job. You can set both timeout-minutes for the whole composite action or its steps as long as the the sum of the `timeout-minutes` for each composite action step that has the attribute `timeout-minutes` is less than or equals to `timeout-minutes` for the composite action. There is no default timeout-minutes for each composite action step. 
+
+If the time taken for any of the steps in combination or individually exceed the whole composite action `timeout-minutes` attribute, the whole job will fail (1). If an individual step exceeds its own `timeout-minutes` attribute but the total time that has been used including this step is below the overall composite action `timeout-minutes`, the individual step will fail but the rest of the steps will run based on their own `timeout-minutes` attribute (they will still abide by condition (1) though).
+
+For reference, in the example above, if the composite step `foo1` takes 11 minutes to run, that step will fail but the rest of the steps, `foo1` and `foo2`, will proceed as long as their total runtime with the previous failed `foo1` action is less than the composite action's `timeout-minutes` (50 minutes). If the composite step `foo2` takes 51 minutes to run, it will cause the whole composite action job to fail. I
+
+The rationale behind this is that users can configure their steps with the `if` condition to conditionally set how steps rely on each other. Due to the additional capabilities that are offered with combining `timeout-minutes` and/or `if`, we wanted the `timeout-minutes` condition to be as dumb as possible and not effect other steps. 
+
+[Usage limits still apply](https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions?query=if%28%29#usage-limits)
+
+
+### Continue-on-error
+
+Example `workflow.yml`:
+
+```yaml
+steps: 
+  - run: exit 1
+  - id: bar
+    uses: user/test@v1
+    continue-on-error: false
+  - id: foo
+    run: echo "Hello World" <------- This step will not run
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+runs:
+  using: "composite"
+  steps: 
+    - run: exit 1
+      continue-on-error: true
+      shell: bash
+    - run: echo "Hello World 2" <----- This step will run
+      shell: bash
+```
+
+**We will not support "continue-on-error" in a composite action for now. This functionality will be focused on in a future ADR.**
+
+If any of the steps fail in the composite action and the `continue-on-error` is set to `false` for the whole composite action step in the workflow file, then the steps below it will run. On the flip side, if `continue-on-error` is set to `true` for the whole composite action step in the workflow file, the next job step will run.
+
+For the composite action steps, it follows the same logic as above. In this example, `"Hello World 2"` will be outputted because the previous step has `continue-on-error` set to `true` although that previous step errored. 
+
+### Visualizing Composite Action in the GitHub Actions UI
+We want all the composite action's steps to be condensed into the original composite action node. 
+
+Here is a visual represenation of the [first example](#Steps)
+
+```yaml
+| composite_action_node |
+    | echo hello world 1 | 
+    | echo hello world 2 |
+| echo hello world 3 | 
+| echo hello world 4 |
+
+```
+
+
+## Consequences
+
+This ADR lays the framework for eventually supporting nested Composite Actions within Composite Actions. This ADR allows for users to run multiple run steps within a GitHub Composite Action with the support of inputs, outputs, environment, and context for use in any steps as well as the if, timeout-minutes, and the continue-on-error attributes for each Composite Action step. 

docs/checks/actions.md

@@ -0,0 +1,44 @@
+
+# Actions Connection Check
+
+## What is this check for?
+
+Make sure the runner has access to actions service for GitHub.com or GitHub Enterprise Server
+
+- For GitHub.com
+  - The runner needs to access https://api.github.com for downloading actions.
+  - The runner needs to access https://vstoken.actions.githubusercontent.com/_apis/.../ for requesting an access token.
+  - The runner needs to access https://pipelines.actions.githubusercontent.com/_apis/.../ for receiving workflow jobs.
+- For GitHub Enterprise Server
+  - The runner needs to access https://myGHES.com/api/v3 for downloading actions.
+  - The runner needs to access https://myGHES.com/_services/vstoken/_apis/.../ for requesting an access token.
+  - The runner needs to access https://myGHES.com/_services/pipelines/_apis/.../ for receiving workflow jobs.
+
+## What is checked?
+
+- DNS lookup for api.github.com or myGHES.com using dotnet
+- Ping api.github.com or myGHES.com using dotnet
+- Make HTTP GET to https://api.github.com or https://myGHES.com/api/v3 using dotnet, check response headers contains `X-GitHub-Request-Id` 
+---
+- DNS lookup for vstoken.actions.githubusercontent.com using dotnet
+- Ping vstoken.actions.githubusercontent.com using dotnet
+- Make HTTP GET to https://vstoken.actions.githubusercontent.com/_apis/health or https://myGHES.com/_services/vstoken/_apis/health using dotnet, check response headers contains `x-vss-e2eid` 
+---
+- DNS lookup for pipelines.actions.githubusercontent.com using dotnet
+- Ping pipelines.actions.githubusercontent.com using dotnet
+- Make HTTP GET to https://pipelines.actions.githubusercontent.com/_apis/health or https://myGHES.com/_services/pipelines/_apis/health using dotnet, check response headers contains `x-vss-e2eid` 
+
+## How to fix the issue?
+
+### 1. Check the common network issue
+  
+  > Please check the [network doc](./network.md)
+
+### 2. SSL certificate related issue
+
+  If you are seeing `System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception.` in the log, it means the runner can't connect to Actions service due to SSL handshake failure.
+  > Please check the [SSL cert doc](./sslcert.md)
+  
+## Still not working?
+
+Contact GitHub customer service or log an issue at https://github.com/actions/runner if you think it's a runner issue.

docs/checks/git.md

@@ -0,0 +1,34 @@
+# Git Connection Check
+
+## What is this check for?
+
+Make sure `git` can access GitHub.com or your GitHub Enterprise Server.
+
+
+## What is checked?
+
+The test is done by executing
+```bash
+# For GitHub.com
+git ls-remote --exit-code https://github.com/actions/checkout HEAD
+
+# For GitHub Enterprise Server
+git ls-remote --exit-code https://ghes.me/actions/checkout HEAD
+```
+
+The test also set environment variable `GIT_TRACE=1` and `GIT_CURL_VERBOSE=1` before running `git ls-remote`, this will make `git` to produce debug log for better debug any potential issues.
+
+## How to fix the issue?
+
+### 1. Check the common network issue
+  
+    > Please check the [network doc](./network.md)
+
+### 2. SSL certificate related issue
+
+  If you are seeing `SSL Certificate problem:` in the log, it means the `git` can't connect to the GitHub server due to SSL handshake failure.
+  > Please check the [SSL cert doc](./sslcert.md)
+  
+## Still not working?
+
+Contact GitHub customer service or log an issue at https://github.com/actions/runner if you think it's a runner issue.

docs/checks/internet.md

@@ -0,0 +1,26 @@
+# Internet Connection Check
+
+## What is this check for?
+
+Make sure the runner has access to https://api.github.com
+
+The runner needs to access https://api.github.com to download any actions from the marketplace.
+
+Even the runner is configured to GitHub Enterprise Server, the runner can still download actions from GitHub.com with [GitHub Connect](https://docs.github.com/en/enterprise-server@2.22/admin/github-actions/enabling-automatic-access-to-githubcom-actions-using-github-connect)
+
+
+## What is checked?
+
+- DNS lookup for api.github.com using dotnet
+- Ping api.github.com using dotnet
+- Make HTTP GET to https://api.github.com using dotnet, check response headers contains `X-GitHub-Request-Id` 
+
+## How to fix the issue?
+
+### 1. Check the common network issue
+  
+  > Please check the [network doc](./network.md)
+
+## Still not working?
+
+Contact GitHub customer service or log an issue at https://github.com/actions/runner if you think it's a runner issue.

docs/checks/network.md

@@ -0,0 +1,29 @@
+## Common Network Related Issues
+
+### Common things that can cause the runner to not working properly
+
+- Bug in the runner or the dotnet framework that causes actions runner can't make Http request in a certain network environment.
+
+- Proxy/Firewall block certain HTTP method, like it block all POST and PUT calls which the runner will use to upload logs.
+
+- Proxy/Firewall only allows requests with certain user-agent to pass through and the actions runner user-agent is not in the allow list.
+
+- Proxy try to decrypt and exam HTTPS traffic for security purpose but cause the actions-runner to fail to finish SSL handshake due to the lack of trusting proxy's CA.
+
+- Firewall rules that block action runner from accessing certain hosts, ex: `*.github.com`, `*.actions.githubusercontent.com`, etc.
+
+
+### Identify and solve these problems
+
+The key is to figure out where is the problem, the network environment, or the actions runner?
+
+Use a 3rd party tool to make the same requests as the runner did would be a good start point.
+
+- Use `nslookup` to check DNS
+- Use `ping` to check Ping
+- Use `curl -v` to check the network stack, good for verifying default certificate/proxy settings.
+- Use `Invoke-WebRequest` from `pwsh` (`PowerShell Core`) to check the dotnet network stack, good for verifying bugs in the dotnet framework.
+
+If the 3rd party tool is also experiencing the same error as the runner does, then you might want to contact your network administrator for help.
+
+Otherwise, contact GitHub customer support or log an issue at https://github.com/actions/runner

docs/checks/nodejs.md

@@ -0,0 +1,30 @@
+# Node.js Connection Check
+
+## What is this check for?
+
+Make sure the built-in node.js has access to GitHub.com or GitHub Enterprise Server.
+
+The runner carries it's own copy of node.js executable under `<runner_root>/externals/node12/`.
+
+All javascript base Actions will get executed by the built-in `node` at `<runner_root>/externals/node12/`.
+
+> Not the `node` from `$PATH`
+
+## What is checked?
+
+- Make HTTPS GET to https://api.github.com or https://myGHES.com/api/v3 using node.js, make sure it gets 200 response code.
+
+## How to fix the issue?
+
+### 1. Check the common network issue
+  
+  > Please check the [network doc](./network.md)
+
+### 2. SSL certificate related issue
+
+  If you are seeing `Https request failed due to SSL cert issue` in the log, it means the `node.js` can't connect to the GitHub server due to SSL handshake failure.
+  > Please check the [SSL cert doc](./sslcert.md)
+  
+## Still not working?
+
+Contact GitHub customer service or log an issue at https://github.com/actions/runner if you think it's a runner issue.

docs/checks/sslcert.md

@@ -0,0 +1,89 @@
+## SSL Certificate Related Issues
+
+You might run into an SSL certificate error when your GitHub Enterprise Server is using a self-signed SSL server certificate or a web proxy within your network is decrypting HTTPS traffic for a security audit.
+
+As long as your certificate is generated properly, most of the issues should be fixed after your trust the certificate properly on the runner machine.
+
+> Different OS might have extra requirements on SSL certificate,
+> Ex: macOS requires `ExtendedKeyUsage` https://support.apple.com/en-us/HT210176
+
+### Don't skip SSL cert validation
+
+> !!! DO NOT SKIP SSL CERT VALIDATION !!!  
+> !!! IT IS A BAD SECURITY PRACTICE !!!  
+
+### Download SSL certificate chain 
+
+Depends on how your SSL server certificate gets configured, you might need to download the whole certificate chain from a machine that has trusted the SSL certificate's CA.
+
+- Approach 1: Download certificate chain using a browser (Chrome, Firefox, IT), you can google for more example, [here is what I found](https://medium.com/@menakajain/export-download-ssl-certificate-from-server-site-url-bcfc41ea46a2)
+
+- Approach 2: Download certificate chain using OpenSSL, you can google for more example, [here is what I found](https://superuser.com/a/176721)
+
+- Approach 3: Ask your network administrator or the owner of the CA certificate to send you a copy of it
+
+### Trust CA certificate for the Runner
+
+The actions runner is a dotnet core application which will follow how dotnet load SSL CA certificates on each OS.
+
+You can get full details documentation at [here](https://docs.microsoft.com/en-us/dotnet/standard/security/cross-platform-cryptography#x509store)
+
+In short: 
+- Windows: Load from Windows certificate store.
+- Linux: Load from OpenSSL CA cert bundle.
+- macOS: Load from macOS KeyChain.
+
+To let the runner trusts your CA certificate, you will need to:
+1. Save your SSL certificate chain which includes the root CA and all intermediate CAs into a `.pem` file.
+2. Use `OpenSSL` to convert `.pem` file to a proper format for different OS, here is some [doc with sample commands](https://www.sslshopper.com/ssl-converter.html)
+3. Trust CA on different OS:
+    - Windows: https://docs.microsoft.com/en-us/skype-sdk/sdn/articles/installing-the-trusted-root-certificate
+    - macOS: ![trust ca cert](./../res/macOStrustCA.gif)
+    - Linux: Refer to the distribution documentation
+      1. RedHat: https://www.redhat.com/sysadmin/ca-certificates-cli
+      2. Ubuntu: http://manpages.ubuntu.com/manpages/focal/man8/update-ca-certificates.8.html
+      3. Google search: "trust ca certificate on [linux distribution]"
+      4. If all approaches failed, set environment variable `SSL_CERT_FILE` to the CA bundle `.pem` file we get. 
+    > To verity cert gets installed properly on Linux, you can try use `curl -v https://sitewithsslissue.com` and `pwsh -Command \"Invoke-WebRequest -Uri https://sitewithsslissue.com\"`
+
+### Trust CA certificate for Git CLI
+
+Git uses various CA bundle file depends on your operation system.
+- Git packaged the CA bundle file within the Git installation on Windows 
+- Git use OpenSSL certificate CA bundle file on Linux and macOS
+
+You can check where Git check CA file by running:
+```bash
+export GIT_CURL_VERBOSE=1
+git ls-remote https://github.com/actions/runner HEAD
+```
+
+You should see something like:
+```
+* Couldn't find host github.com in the .netrc file; using defaults
+*   Trying 140.82.114.4...
+* TCP_NODELAY set
+* Connected to github.com (140.82.114.4) port 443 (#0)
+* ALPN, offering h2
+* ALPN, offering http/1.1
+* successfully set certificate verify locations:
+*   CAfile: /etc/ssl/cert.pem
+  CApath: none
+* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
+```
+This tells me `/etc/ssl/cert.pem` is where it read trusted CA certificates.
+
+To let Git trusts your CA certificate, you will need to:
+1. Save your SSL certificate chain which includes the root CA and all intermediate CAs into a `.pem` file.
+2. Set `http.sslCAInfo` Git config or `GIT_SSL_CAINFO` environment variable to the full path of the `.pem` file [Git Doc](https://git-scm.com/docs/git-config#Documentation/git-config.txt-httpsslCAInfo)
+> I would recommend using `http.sslCAInfo` since it can be scope to certain hosts that need the extra trusted CA.  
+> Ex: `git config --global http.https://myghes.com/.sslCAInfo /extra/ca/cert.pem`  
+> This will make Git use the `/extra/ca/cert.pem` only when communicates with `https://myghes.com` and keep using the default CA bundle with others.
+
+### Trust CA certificate for Node.js
+
+Node.js has compiled a snapshot of the Mozilla CA store that is fixed at each version of Node.js' release time.
+
+To let Node.js trusts your CA certificate, you will need to:
+1. Save your SSL certificate chain which includes the root CA and all intermediate CAs into a `.pem` file.
+2. Set environment variable `NODE_EXTRA_CA_CERTS` which point to the file. ex: `export NODE_EXTRA_CA_CERTS=/full/path/to/cacert.pem` or `set NODE_EXTRA_CA_CERTS=C:\full\path\to\cacert.pem`

docs/contribute.md

@@ -14,7 +14,7 @@ Issues in this repository should be for the runner application.  Note that the V
 
 We ask that before significant effort is put into code changes, that we have agreement on taking the change before time is invested in code changes. 
 
-1. Create a feature request.  Once agreed we will take the enhancment
+1. Create a feature request.  Once agreed we will take the enhancement
 2. Create an ADR to agree on the details of the change.
 
 An ADR is an Architectural Decision Record.  This allows consensus on the direction forward and also serves as a record of the change and motivation.  [Read more here](adrs/README.md)
@@ -23,7 +23,7 @@ An ADR is an Architectural Decision Record.  This allows consensus on the direct
 
 ### Required Dev Dependencies
 
-![Win](res/win_sm.png) Git for Windows [Install Here](https://git-scm.com/downloads) (needed for dev sh script)
+![Win](res/win_sm.png) ![*nix](res/linux_sm.png)  Git for Windows and Linux [Install Here](https://git-scm.com/downloads) (needed for dev sh script)
 
 ### To Build, Test, Layout 
 
@@ -43,6 +43,7 @@ Sample developer flow:
 
 ```bash
 git clone https://github.com/actions/runner
+cd runner
 cd ./src
 ./dev.(sh/cmd) layout # the runner that built from source is in {root}/_layout
 <make code changes>
@@ -50,10 +51,23 @@ cd ./src
 ./dev.(sh/cmd) test # run all unit tests before git commit/push
 ```
 
+View logs:
+```bash
+cd runner/_layout/_diag
+ls
+cat (Runner/Worker)_TIMESTAMP.log # view your log file
+```
+
+Run Runner:
+```bash
+cd runner/_layout
+./run.sh # run your custom runner
+```
+
 ### Editors
 
 [Using Visual Studio Code](https://code.visualstudio.com/)
-[Using Visual Studio 2019](https://www.visualstudio.com/vs/)  
+[Using Visual Studio](https://code.visualstudio.com/docs)  
 
 ### Styling
 

docs/start/envlinux.md

@@ -15,16 +15,16 @@ x64
   - openSUSE 15+
   - SUSE Enterprise Linux (SLES) 12 SP2+
 
-## Install .Net Core 3.x Linux Dependencies
+## Install .Net Core 5 Linux Dependencies
 
-The `./config.sh` will check .Net Core 3.x dependencies during runner configuration.  
+The `./config.sh` will check .Net Core 5 dependencies during runner configuration.  
 You might see something like this which indicate a dependency's missing.
 ```bash
 ./config.sh
     libunwind.so.8 => not found
     libunwind-x86_64.so.8 => not found
-Dependencies is missing for Dotnet Core 3.0
+Dependencies is missing for Dotnet 5
-Execute ./bin/installdependencies.sh to install any missing Dotnet Core 3.0 dependencies.
+Execute ./bin/installdependencies.sh to install any missing Dotnet 5 dependencies.
 ```
 You can easily correct the problem by executing `./bin/installdependencies.sh`.  
 The `installdependencies.sh` script should install all required dependencies on all supported Linux versions   

releaseNote.md

@@ -1,20 +1,11 @@
 ## Features
-  - Sample scripts to automate scalable runners (#427)
+
-  - Raise warning when action input does not match action.yml. (#429)
-  - Add secret masker for trimming double quotes. (#440)
-  - Use the API_URL and munge action URLs for GHES (#437 #469)
-  - Help trace worker crash in Kusto. (#450)
-  - update checkout@v1 for GHES (#470)
 ## Bugs
-  - Print node version in debug instead of output. (#433)
+  - Downgrade runner to .NET 3 to address an issue with broken pipes in Ubuntu (#928)
-  - Better error when runner removed from service. (#441)
+  - Fixed an issue where FIPS Cryptography broke back-compat scenarios (#928)
-  - Add help info for '--labels' config option (#472)
+
-  - Sps/token migration fix, job.status/steps.outcome/steps.conclusion case match with GitHub check suites conclusion. (#462)
-  - Docker build using -f instead of implied default (#471)
 ## Misc
-  - Make release notes code blocks copy-paste-able (#430)
+  - Updated dotnet install scripts (#928)
-  - Fix spelling of RHEL and CentOS. (#436)
-  - Add CodeQL Analysis workflow (#459)
 
 ## Windows x64
 We recommend configuring the runner in a root folder of the Windows drive (e.g. "C:\actions-runner"). This will help avoid issues related to service identity folder permissions and long file path restrictions on Windows.

releaseVersion

@@ -1 +1 @@
-<Update to ./src/runnerversion when creating release>
+2.276.1

scripts/create-latest-svc.sh

@@ -12,12 +12,13 @@ set -e
 #
 # Usage:
 #     export RUNNER_CFG_PAT=<yourPAT>
-#     ./create-latest-svc scope [ghe_domain] [name] [user]
+#     ./create-latest-svc scope [ghe_domain] [name] [user] [labels]
 #
 #      scope       required  repo (:owner/:repo) or org (:organization)
 #      ghe_domain  optional  the fully qualified domain name of your GitHub Enterprise Server deployment
 #      name        optional  defaults to hostname
 #      user        optional  user svc will run as. defaults to current
+#      labels      optional  list of labels (split by comma) applied on the runner
 #
 # Notes:
 # PATS over envvars are more secure
@@ -30,6 +31,7 @@ runner_scope=${1}
 ghe_hostname=${2}
 runner_name=${3:-$(hostname)}
 svc_user=${4:-$USER}
+labels=${5}
 
 echo "Configuring runner @ ${runner_scope}"
 sudo echo
@@ -81,7 +83,7 @@ fi
 
 export RUNNER_TOKEN=$(curl -s -X POST ${base_api_url}/${orgs_or_repos}/${runner_scope}/actions/runners/registration-token -H "accept: application/vnd.github.everest-preview+json" -H "authorization: token ${RUNNER_CFG_PAT}" | jq -r '.token')
 
-if [ -z "$RUNNER_TOKEN" ]; then fatal "Failed to get a token"; fi
+if [ "null" == "$RUNNER_TOKEN" -o -z "$RUNNER_TOKEN" ]; then fatal "Failed to get a token"; fi
 
 #---------------------------------------
 # Download latest released and extract
@@ -130,8 +132,8 @@ fi
 
 echo
 echo "Configuring ${runner_name} @ $runner_url"
-echo "./config.sh --unattended --url $runner_url --token *** --name $runner_name"
+echo "./config.sh --unattended --url $runner_url --token *** --name $runner_name --labels $labels"
-sudo -E -u ${svc_user} ./config.sh --unattended --url $runner_url --token $RUNNER_TOKEN --name $runner_name
+sudo -E -u ${svc_user} ./config.sh --unattended --url $runner_url --token $RUNNER_TOKEN --name $runner_name --labels $labels
 
 #---------------------------------------
 # Configuring as a service

src/.editorconfig

@@ -0,0 +1,10 @@
+[*.cs]
+charset = utf-8
+insert_final_newline = true
+
+csharp_new_line_before_else = true
+csharp_new_line_before_catch = true
+csharp_new_line_before_finally = true
+csharp_new_line_before_open_brace = all
+
+csharp_space_after_keywords_in_control_flow_statements = true

src/ActionsRunner.sln

@@ -1,4 +1,4 @@
-
+
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 16
 VisualStudioVersion = 16.0.29411.138
@@ -21,6 +21,11 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Sdk", "Sdk\Sdk.csproj", "{D
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Test", "Test\Test.csproj", "{C932061F-F6A1-4F1E-B854-A6C6B30DC3EF}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{EFB254FC-7927-445E-BA64-6676ADB309E9}"
+	ProjectSection(SolutionItems) = preProject
+		.editorconfig = .editorconfig
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU

src/Misc/dotnet-install.ps1

@@ -23,8 +23,6 @@
     Default: latest
     Represents a build version on specific channel. Possible values:
     - latest - most latest build on specific channel
-    - coherent - most latest coherent build on specific channel
-          coherent applies only to SDK downloads
     - 3-part version in a format A.B.C - represents specific version of build
           examples: 2.0.0-preview2-006120, 1.1.0
 .PARAMETER InstallDir
@@ -69,6 +67,8 @@
 .PARAMETER ProxyUseDefaultCredentials
     Default: false
     Use default credentials, when using proxy address.
+.PARAMETER ProxyBypassList
+    If set with ProxyAddress, will provide the list of comma separated urls that will bypass the proxy
 .PARAMETER SkipNonVersionedFiles
     Default: false
     Skips installing non-versioned files if they already exist, such as dotnet.exe.
@@ -96,6 +96,7 @@ param(
    [string]$FeedCredential,
    [string]$ProxyAddress,
    [switch]$ProxyUseDefaultCredentials,
+   [string[]]$ProxyBypassList=@(),
    [switch]$SkipNonVersionedFiles,
    [switch]$NoCdn
 )
@@ -119,11 +120,45 @@ $VersionRegEx="/\d+\.\d+[^/]+/"
 $OverrideNonVersionedFiles = !$SkipNonVersionedFiles
 
 function Say($str) {
-    Write-Host "dotnet-install: $str"
+    try {
+        Write-Host "dotnet-install: $str"
+    }
+    catch {
+        # Some platforms cannot utilize Write-Host (Azure Functions, for instance). Fall back to Write-Output
+        Write-Output "dotnet-install: $str"
+    }
+}
+
+function Say-Warning($str) {
+    try {
+        Write-Warning "dotnet-install: $str"
+    }
+    catch {
+        # Some platforms cannot utilize Write-Warning (Azure Functions, for instance). Fall back to Write-Output
+        Write-Output "dotnet-install: Warning: $str"
+    }
+}
+
+# Writes a line with error style settings.
+# Use this function to show a human-readable comment along with an exception.
+function Say-Error($str) {
+    try {
+        # Write-Error is quite oververbose for the purpose of the function, let's write one line with error style settings.
+        $Host.UI.WriteErrorLine("dotnet-install: $str")
+    }
+    catch {
+        Write-Output "dotnet-install: Error: $str"
+    }
 }
 
 function Say-Verbose($str) {
-    Write-Verbose "dotnet-install: $str"
+    try {
+        Write-Verbose "dotnet-install: $str"
+    }
+    catch {
+        # Some platforms cannot utilize Write-Verbose (Azure Functions, for instance). Fall back to Write-Output
+        Write-Output "dotnet-install: $str"
+    }
 }
 
 function Say-Invocation($Invocation) {
@@ -137,7 +172,7 @@ function Invoke-With-Retry([ScriptBlock]$ScriptBlock, [int]$MaxAttempts = 3, [in
 
     while ($true) {
         try {
-            return $ScriptBlock.Invoke()
+            return & $ScriptBlock
         }
         catch {
             $Attempts++
@@ -154,7 +189,16 @@ function Invoke-With-Retry([ScriptBlock]$ScriptBlock, [int]$MaxAttempts = 3, [in
 function Get-Machine-Architecture() {
     Say-Invocation $MyInvocation
 
-    # possible values: amd64, x64, x86, arm64, arm
+    # On PS x86, PROCESSOR_ARCHITECTURE reports x86 even on x64 systems.
+    # To get the correct architecture, we need to use PROCESSOR_ARCHITEW6432.
+    # PS x64 doesn't define this, so we fall back to PROCESSOR_ARCHITECTURE.
+    # Possible values: amd64, x64, x86, arm64, arm
+
+    if( $ENV:PROCESSOR_ARCHITEW6432 -ne $null )
+    {    
+        return $ENV:PROCESSOR_ARCHITEW6432
+    }
+
     return $ENV:PROCESSOR_ARCHITECTURE
 }
 
@@ -167,7 +211,7 @@ function Get-CLIArchitecture-From-Architecture([string]$Architecture) {
         { $_ -eq "x86" } { return "x86" }
         { $_ -eq "arm" } { return "arm" }
         { $_ -eq "arm64" } { return "arm64" }
-        default { throw "Architecture not supported. If you think this is a bug, report it at https://github.com/dotnet/sdk/issues" }
+        default { throw "Architecture '$Architecture' not supported. If you think this is a bug, report it at https://github.com/dotnet/install-scripts/issues" }
     }
 }
 
@@ -228,7 +272,11 @@ function GetHTTPResponse([Uri] $Uri)
 
             if($ProxyAddress) {
                 $HttpClientHandler = New-Object System.Net.Http.HttpClientHandler
-                $HttpClientHandler.Proxy =  New-Object System.Net.WebProxy -Property @{Address=$ProxyAddress;UseDefaultCredentials=$ProxyUseDefaultCredentials}
+                $HttpClientHandler.Proxy =  New-Object System.Net.WebProxy -Property @{
+                    Address=$ProxyAddress;
+                    UseDefaultCredentials=$ProxyUseDefaultCredentials;
+                    BypassList = $ProxyBypassList;
+                }
                 $HttpClient = New-Object System.Net.Http.HttpClient -ArgumentList $HttpClientHandler
             }
             else {
@@ -238,18 +286,41 @@ function GetHTTPResponse([Uri] $Uri)
             # Default timeout for HttpClient is 100s.  For a 50 MB download this assumes 500 KB/s average, any less will time out
             # 20 minutes allows it to work over much slower connections.
             $HttpClient.Timeout = New-TimeSpan -Minutes 20
-            $Response = $HttpClient.GetAsync("${Uri}${FeedCredential}").Result
+            $Task = $HttpClient.GetAsync("${Uri}${FeedCredential}").ConfigureAwait("false");
-            if (($Response -eq $null) -or (-not ($Response.IsSuccessStatusCode))) {
+            $Response = $Task.GetAwaiter().GetResult();
-                 # The feed credential is potentially sensitive info. Do not log FeedCredential to console output.
+
-                $ErrorMsg = "Failed to download $Uri."
+            if (($null -eq $Response) -or (-not ($Response.IsSuccessStatusCode))) {
-                if ($Response -ne $null) {
+                # The feed credential is potentially sensitive info. Do not log FeedCredential to console output.
-                    $ErrorMsg += "  $Response"
+                $DownloadException = [System.Exception] "Unable to download $Uri."
+
+                if ($null -ne $Response) {
+                    $DownloadException.Data["StatusCode"] = [int] $Response.StatusCode
+                    $DownloadException.Data["ErrorMessage"] = "Unable to download $Uri. Returned HTTP status code: " + $DownloadException.Data["StatusCode"]
                 }
 
-                throw $ErrorMsg
+                throw $DownloadException
             }
 
-             return $Response
+            return $Response
+        }
+        catch [System.Net.Http.HttpRequestException] {
+            $DownloadException = [System.Exception] "Unable to download $Uri."
+
+            # Pick up the exception message and inner exceptions' messages if they exist
+            $CurrentException = $PSItem.Exception
+            $ErrorMsg = $CurrentException.Message + "`r`n"
+            while ($CurrentException.InnerException) {
+              $CurrentException = $CurrentException.InnerException
+              $ErrorMsg += $CurrentException.Message + "`r`n"
+            }
+
+            # Check if there is an issue concerning TLS.
+            if ($ErrorMsg -like "*SSL/TLS*") {
+                $ErrorMsg += "Ensure that TLS 1.2 or higher is enabled to use this script.`r`n"
+            }
+
+            $DownloadException.Data["ErrorMessage"] = $ErrorMsg
+            throw $DownloadException
         }
         finally {
              if ($HttpClient -ne $null) {
@@ -259,7 +330,7 @@ function GetHTTPResponse([Uri] $Uri)
     })
 }
 
-function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel, [bool]$Coherent) {
+function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel) {
     Say-Invocation $MyInvocation
 
     $VersionFileUrl = $null
@@ -274,12 +345,7 @@ function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel, [bool]$Co
         $VersionFileUrl = "$UncachedFeed/Runtime/$Channel/latest.version"
     }
     elseif (-not $Runtime) {
-        if ($Coherent) {
+        $VersionFileUrl = "$UncachedFeed/Sdk/$Channel/latest.version"
-            $VersionFileUrl = "$UncachedFeed/Sdk/$Channel/latest.coherent.version"
-        }
-        else {
-            $VersionFileUrl = "$UncachedFeed/Sdk/$Channel/latest.version"
-        }
     }
     else {
         throw "Invalid value for `$Runtime"
@@ -288,7 +354,8 @@ function Get-Latest-Version-Info([string]$AzureFeed, [string]$Channel, [bool]$Co
         $Response = GetHTTPResponse -Uri $VersionFileUrl
     }
     catch {
-        throw "Could not resolve version information."
+        Say-Error "Could not resolve version information."
+        throw
     }
     $StringContent = $Response.Content.ReadAsStringAsync().Result
 
@@ -314,7 +381,8 @@ function Parse-Jsonfile-For-Version([string]$JSonFile) {
         $JSonContent = Get-Content($JSonFile) -Raw | ConvertFrom-Json | Select-Object -expand "sdk" -ErrorAction SilentlyContinue
     }
     catch {
-        throw "Json file unreadable: '$JSonFile'"
+        Say-Error "Json file unreadable: '$JSonFile'"
+        throw
     }
     if ($JSonContent) {
         try {
@@ -327,7 +395,8 @@ function Parse-Jsonfile-For-Version([string]$JSonFile) {
             }
         }
         catch {
-            throw "Unable to parse the SDK node in '$JSonFile'"
+            Say-Error "Unable to parse the SDK node in '$JSonFile'"
+            throw
         }
     }
     else {
@@ -343,16 +412,12 @@ function Get-Specific-Version-From-Version([string]$AzureFeed, [string]$Channel,
     Say-Invocation $MyInvocation
 
     if (-not $JSonFile) {
-        switch ($Version.ToLower()) {
+        if ($Version.ToLower() -eq "latest") {
-            { $_ -eq "latest" } {
+            $LatestVersionInfo = Get-Latest-Version-Info -AzureFeed $AzureFeed -Channel $Channel
-                $LatestVersionInfo = Get-Latest-Version-Info -AzureFeed $AzureFeed -Channel $Channel -Coherent $False
+            return $LatestVersionInfo.Version
-                return $LatestVersionInfo.Version
+        }
-            }
+        else {
-            { $_ -eq "coherent" } {
+            return $Version 
-                $LatestVersionInfo = Get-Latest-Version-Info -AzureFeed $AzureFeed -Channel $Channel -Coherent $True
-                return $LatestVersionInfo.Version
-            }
-            default { return $Version }
         }
     }
     else {
@@ -363,17 +428,20 @@ function Get-Specific-Version-From-Version([string]$AzureFeed, [string]$Channel,
 function Get-Download-Link([string]$AzureFeed, [string]$SpecificVersion, [string]$CLIArchitecture) {
     Say-Invocation $MyInvocation
 
+    # If anything fails in this lookup it will default to $SpecificVersion
+    $SpecificProductVersion = Get-Product-Version -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion
+
     if ($Runtime -eq "dotnet") {
-        $PayloadURL = "$AzureFeed/Runtime/$SpecificVersion/dotnet-runtime-$SpecificVersion-win-$CLIArchitecture.zip"
+        $PayloadURL = "$AzureFeed/Runtime/$SpecificVersion/dotnet-runtime-$SpecificProductVersion-win-$CLIArchitecture.zip"
     }
     elseif ($Runtime -eq "aspnetcore") {
-        $PayloadURL = "$AzureFeed/aspnetcore/Runtime/$SpecificVersion/aspnetcore-runtime-$SpecificVersion-win-$CLIArchitecture.zip"
+        $PayloadURL = "$AzureFeed/aspnetcore/Runtime/$SpecificVersion/aspnetcore-runtime-$SpecificProductVersion-win-$CLIArchitecture.zip"
     }
     elseif ($Runtime -eq "windowsdesktop") {
-        $PayloadURL = "$AzureFeed/Runtime/$SpecificVersion/windowsdesktop-runtime-$SpecificVersion-win-$CLIArchitecture.zip"
+        $PayloadURL = "$AzureFeed/Runtime/$SpecificVersion/windowsdesktop-runtime-$SpecificProductVersion-win-$CLIArchitecture.zip"
     }
     elseif (-not $Runtime) {
-        $PayloadURL = "$AzureFeed/Sdk/$SpecificVersion/dotnet-sdk-$SpecificVersion-win-$CLIArchitecture.zip"
+        $PayloadURL = "$AzureFeed/Sdk/$SpecificVersion/dotnet-sdk-$SpecificProductVersion-win-$CLIArchitecture.zip"
     }
     else {
         throw "Invalid value for `$Runtime"
@@ -381,7 +449,7 @@ function Get-Download-Link([string]$AzureFeed, [string]$SpecificVersion, [string
 
     Say-Verbose "Constructed primary named payload URL: $PayloadURL"
 
-    return $PayloadURL
+    return $PayloadURL, $SpecificProductVersion
 }
 
 function Get-LegacyDownload-Link([string]$AzureFeed, [string]$SpecificVersion, [string]$CLIArchitecture) {
@@ -402,6 +470,51 @@ function Get-LegacyDownload-Link([string]$AzureFeed, [string]$SpecificVersion, [
     return $PayloadURL
 }
 
+function Get-Product-Version([string]$AzureFeed, [string]$SpecificVersion) {
+    Say-Invocation $MyInvocation
+
+    if ($Runtime -eq "dotnet") {
+        $ProductVersionTxtURL = "$AzureFeed/Runtime/$SpecificVersion/productVersion.txt"
+    }
+    elseif ($Runtime -eq "aspnetcore") {
+        $ProductVersionTxtURL = "$AzureFeed/aspnetcore/Runtime/$SpecificVersion/productVersion.txt"
+    }
+    elseif ($Runtime -eq "windowsdesktop") {
+        $ProductVersionTxtURL = "$AzureFeed/Runtime/$SpecificVersion/productVersion.txt"
+    }
+    elseif (-not $Runtime) {
+        $ProductVersionTxtURL = "$AzureFeed/Sdk/$SpecificVersion/productVersion.txt"
+    }
+    else {
+        throw "Invalid value '$Runtime' specified for `$Runtime"
+    }
+
+    Say-Verbose "Checking for existence of $ProductVersionTxtURL"
+
+    try {
+        $productVersionResponse = GetHTTPResponse($productVersionTxtUrl)
+
+        if ($productVersionResponse.StatusCode -eq 200) {
+            $productVersion = $productVersionResponse.Content.ReadAsStringAsync().Result.Trim()
+            if ($productVersion -ne $SpecificVersion)
+            {
+                Say "Using alternate version $productVersion found in $ProductVersionTxtURL"
+            }
+
+            return $productVersion
+        }
+        else {
+            Say-Verbose "Got StatusCode $($productVersionResponse.StatusCode) trying to get productVersion.txt at $productVersionTxtUrl, so using default value of $SpecificVersion"
+            $productVersion = $SpecificVersion
+        }
+    } catch {
+        Say-Verbose "Could not read productVersion.txt at $productVersionTxtUrl, so using default value of $SpecificVersion (Exception: '$($_.Exception.Message)' )"
+        $productVersion = $SpecificVersion
+    }
+
+    return $productVersion
+}
+
 function Get-User-Share-Path() {
     Say-Invocation $MyInvocation
 
@@ -539,6 +652,23 @@ function DownloadFile($Source, [string]$OutPath) {
     }
 }
 
+function SafeRemoveFile($Path) {
+    try {
+        if (Test-Path $Path) {
+            Remove-Item $Path
+            Say-Verbose "The temporary file `"$Path`" was removed."
+        }
+        else
+        {
+            Say-Verbose "The temporary file `"$Path`" does not exist, therefore is not removed."
+        }
+    }
+    catch
+    {
+        Say-Warning "Failed to remove the temporary file: `"$Path`", remove it manually."
+    }
+}
+
 function Prepend-Sdk-InstallRoot-To-Path([string]$InstallRoot, [string]$BinFolderRelativePath) {
     $BinPath = Get-Absolute-Path $(Join-Path -Path $InstallRoot -ChildPath $BinFolderRelativePath)
     if (-Not $NoPath) {
@@ -555,9 +685,14 @@ function Prepend-Sdk-InstallRoot-To-Path([string]$InstallRoot, [string]$BinFolde
     }
 }
 
+Say "Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:"
+Say "- The SDK needs to be installed without user interaction and without admin rights."
+Say "- The SDK installation doesn't need to persist across multiple CI runs."
+Say "To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.`r`n"
+
 $CLIArchitecture = Get-CLIArchitecture-From-Architecture $Architecture
 $SpecificVersion = Get-Specific-Version-From-Version -AzureFeed $AzureFeed -Channel $Channel -Version $Version -JSonFile $JSonFile
-$DownloadLink = Get-Download-Link -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion -CLIArchitecture $CLIArchitecture
+$DownloadLink, $EffectiveVersion = Get-Download-Link -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion -CLIArchitecture $CLIArchitecture
 $LegacyDownloadLink = Get-LegacyDownload-Link -AzureFeed $AzureFeed -SpecificVersion $SpecificVersion -CLIArchitecture $CLIArchitecture
 
 $InstallRoot = Resolve-Installation-Path $InstallDir
@@ -583,7 +718,12 @@ if ($DryRun) {
         }
     }
     Say "Repeatable invocation: $RepeatableCommand"
-    exit 0
+    if ($SpecificVersion -ne $EffectiveVersion)
+    {
+        Say "NOTE: Due to finding a version manifest with this runtime, it would actually install with version '$EffectiveVersion'"
+    }
+
+    return
 }
 
 if ($Runtime -eq "dotnet") {
@@ -606,12 +746,18 @@ else {
     throw "Invalid value for `$Runtime"
 }
 
+if ($SpecificVersion -ne $EffectiveVersion)
+{
+   Say "Performing installation checks for effective version: $EffectiveVersion"
+   $SpecificVersion = $EffectiveVersion
+}
+
 #  Check if the SDK version is already installed.
 $isAssetInstalled = Is-Dotnet-Package-Installed -InstallRoot $InstallRoot -RelativePathToPackage $dotnetPackageRelativePath -SpecificVersion $SpecificVersion
 if ($isAssetInstalled) {
     Say "$assetName version $SpecificVersion is already installed."
     Prepend-Sdk-InstallRoot-To-Path -InstallRoot $InstallRoot -BinFolderRelativePath $BinFolderRelativePath
-    exit 0
+    return
 }
 
 New-Item -ItemType Directory -Force -Path $InstallRoot | Out-Null
@@ -619,30 +765,69 @@ New-Item -ItemType Directory -Force -Path $InstallRoot | Out-Null
 $installDrive = $((Get-Item $InstallRoot).PSDrive.Name);
 $diskInfo = Get-PSDrive -Name $installDrive
 if ($diskInfo.Free / 1MB -le 100) {
-    Say "There is not enough disk space on drive ${installDrive}:"
+    throw "There is not enough disk space on drive ${installDrive}:"
-    exit 0
 }
 
 $ZipPath = [System.IO.Path]::combine([System.IO.Path]::GetTempPath(), [System.IO.Path]::GetRandomFileName())
 Say-Verbose "Zip path: $ZipPath"
 
 $DownloadFailed = $false
-Say "Downloading link: $DownloadLink"
+
+$PrimaryDownloadStatusCode = 0
+$LegacyDownloadStatusCode = 0
+
+$PrimaryDownloadFailedMsg = ""
+$LegacyDownloadFailedMsg = ""
+
+Say "Downloading primary link $DownloadLink"
 try {
     DownloadFile -Source $DownloadLink -OutPath $ZipPath
 }
 catch {
-    Say "Cannot download: $DownloadLink"
+    if ($PSItem.Exception.Data.Contains("StatusCode")) {
+        $PrimaryDownloadStatusCode = $PSItem.Exception.Data["StatusCode"]
+    }
+
+    if ($PSItem.Exception.Data.Contains("ErrorMessage")) {
+        $PrimaryDownloadFailedMsg = $PSItem.Exception.Data["ErrorMessage"]
+    } else {
+        $PrimaryDownloadFailedMsg = $PSItem.Exception.Message
+    }
+
+    if ($PrimaryDownloadStatusCode -eq 404) {
+        Say "The resource at $DownloadLink is not available."
+    } else {
+        Say $PSItem.Exception.Message
+    }
+
+    SafeRemoveFile -Path $ZipPath
+
     if ($LegacyDownloadLink) {
         $DownloadLink = $LegacyDownloadLink
         $ZipPath = [System.IO.Path]::combine([System.IO.Path]::GetTempPath(), [System.IO.Path]::GetRandomFileName())
         Say-Verbose "Legacy zip path: $ZipPath"
-        Say "Downloading legacy link: $DownloadLink"
+        Say "Downloading legacy link $DownloadLink"
         try {
             DownloadFile -Source $DownloadLink -OutPath $ZipPath
         }
         catch {
-            Say "Cannot download: $DownloadLink"
+            if ($PSItem.Exception.Data.Contains("StatusCode")) {
+                $LegacyDownloadStatusCode = $PSItem.Exception.Data["StatusCode"]
+            }
+
+            if ($PSItem.Exception.Data.Contains("ErrorMessage")) {
+                $LegacyDownloadFailedMsg = $PSItem.Exception.Data["ErrorMessage"]
+            } else {
+                $LegacyDownloadFailedMsg = $PSItem.Exception.Message
+            }
+
+            if ($LegacyDownloadStatusCode -eq 404) {
+                Say "The resource at $DownloadLink is not available."
+            } else {
+                Say $PSItem.Exception.Message
+            }
+
+            SafeRemoveFile -Path $ZipPath
             $DownloadFailed = $true
         }
     }
@@ -652,7 +837,19 @@ catch {
 }
 
 if ($DownloadFailed) {
-    throw "Could not find/download: `"$assetName`" with version = $SpecificVersion`nRefer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support"
+    if (($PrimaryDownloadStatusCode -eq 404) -and ((-not $LegacyDownloadLink) -or ($LegacyDownloadStatusCode -eq 404))) {
+        throw "Could not find `"$assetName`" with version = $SpecificVersion`nRefer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support"
+    } else {
+        # 404-NotFound is an expected response if it goes from only one of the links, do not show that error.
+        # If primary path is available (not 404-NotFound) then show the primary error else show the legacy error.
+        if ($PrimaryDownloadStatusCode -ne 404) {
+            throw "Could not download `"$assetName`" with version = $SpecificVersion`r`n$PrimaryDownloadFailedMsg"
+        }
+        if (($LegacyDownloadLink) -and ($LegacyDownloadStatusCode -ne 404)) {
+            throw "Could not download `"$assetName`" with version = $SpecificVersion`r`n$LegacyDownloadFailedMsg"
+        }
+        throw "Could not download `"$assetName`" with version = $SpecificVersion"
+    }
 }
 
 Say "Extracting zip from $DownloadLink"
@@ -674,13 +871,208 @@ if (!$isAssetInstalled) {
     $isAssetInstalled = Is-Dotnet-Package-Installed -InstallRoot $InstallRoot -RelativePathToPackage $dotnetPackageRelativePath -SpecificVersion $SpecificVersion
 }
 
+# Version verification failed. More likely something is wrong either with the downloaded content or with the verification algorithm.
 if (!$isAssetInstalled) {
+    Say-Error "Failed to verify the version of installed `"$assetName`".`nInstallation source: $DownloadLink.`nInstallation location: $InstallRoot.`nReport the bug at https://github.com/dotnet/install-scripts/issues."
     throw "`"$assetName`" with version = $SpecificVersion failed to install with an unknown error."
 }
 
-Remove-Item $ZipPath
+SafeRemoveFile -Path $ZipPath
 
 Prepend-Sdk-InstallRoot-To-Path -InstallRoot $InstallRoot -BinFolderRelativePath $BinFolderRelativePath
 
+Say "Note that the script does not resolve dependencies during installation."
+Say "To check the list of dependencies, go to https://docs.microsoft.com/dotnet/core/install/windows#dependencies"
 Say "Installation finished"
-exit 0
+# SIG # Begin signature block
+# MIIjkgYJKoZIhvcNAQcCoIIjgzCCI38CAQExDzANBglghkgBZQMEAgEFADB5Bgor
+# BgEEAYI3AgEEoGswaTA0BgorBgEEAYI3AgEeMCYCAwEAAAQQH8w7YFlLCE63JNLG
+# KX7zUQIBAAIBAAIBAAIBAAIBADAxMA0GCWCGSAFlAwQCAQUABCD2c707qnCLOLIC
+# n6Mu5Gr4+Xp68foyZlGlTycnycc5l6CCDYEwggX/MIID56ADAgECAhMzAAABh3IX
+# chVZQMcJAAAAAAGHMA0GCSqGSIb3DQEBCwUAMH4xCzAJBgNVBAYTAlVTMRMwEQYD
+# VQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNy
+# b3NvZnQgQ29ycG9yYXRpb24xKDAmBgNVBAMTH01pY3Jvc29mdCBDb2RlIFNpZ25p
+# bmcgUENBIDIwMTEwHhcNMjAwMzA0MTgzOTQ3WhcNMjEwMzAzMTgzOTQ3WjB0MQsw
+# CQYDVQQGEwJVUzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMHUmVkbW9u
+# ZDEeMBwGA1UEChMVTWljcm9zb2Z0IENvcnBvcmF0aW9uMR4wHAYDVQQDExVNaWNy
+# b3NvZnQgQ29ycG9yYXRpb24wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIB
+# AQDOt8kLc7P3T7MKIhouYHewMFmnq8Ayu7FOhZCQabVwBp2VS4WyB2Qe4TQBT8aB
+# znANDEPjHKNdPT8Xz5cNali6XHefS8i/WXtF0vSsP8NEv6mBHuA2p1fw2wB/F0dH
+# sJ3GfZ5c0sPJjklsiYqPw59xJ54kM91IOgiO2OUzjNAljPibjCWfH7UzQ1TPHc4d
+# weils8GEIrbBRb7IWwiObL12jWT4Yh71NQgvJ9Fn6+UhD9x2uk3dLj84vwt1NuFQ
+# itKJxIV0fVsRNR3abQVOLqpDugbr0SzNL6o8xzOHL5OXiGGwg6ekiXA1/2XXY7yV
+# Fc39tledDtZjSjNbex1zzwSXAgMBAAGjggF+MIIBejAfBgNVHSUEGDAWBgorBgEE
+# AYI3TAgBBggrBgEFBQcDAzAdBgNVHQ4EFgQUhov4ZyO96axkJdMjpzu2zVXOJcsw
+# UAYDVR0RBEkwR6RFMEMxKTAnBgNVBAsTIE1pY3Jvc29mdCBPcGVyYXRpb25zIFB1
+# ZXJ0byBSaWNvMRYwFAYDVQQFEw0yMzAwMTIrNDU4Mzg1MB8GA1UdIwQYMBaAFEhu
+# ZOVQBdOCqhc3NyK1bajKdQKVMFQGA1UdHwRNMEswSaBHoEWGQ2h0dHA6Ly93d3cu
+# bWljcm9zb2Z0LmNvbS9wa2lvcHMvY3JsL01pY0NvZFNpZ1BDQTIwMTFfMjAxMS0w
+# Ny0wOC5jcmwwYQYIKwYBBQUHAQEEVTBTMFEGCCsGAQUFBzAChkVodHRwOi8vd3d3
+# Lm1pY3Jvc29mdC5jb20vcGtpb3BzL2NlcnRzL01pY0NvZFNpZ1BDQTIwMTFfMjAx
+# MS0wNy0wOC5jcnQwDAYDVR0TAQH/BAIwADANBgkqhkiG9w0BAQsFAAOCAgEAixmy
+# S6E6vprWD9KFNIB9G5zyMuIjZAOuUJ1EK/Vlg6Fb3ZHXjjUwATKIcXbFuFC6Wr4K
+# NrU4DY/sBVqmab5AC/je3bpUpjtxpEyqUqtPc30wEg/rO9vmKmqKoLPT37svc2NV
+# BmGNl+85qO4fV/w7Cx7J0Bbqk19KcRNdjt6eKoTnTPHBHlVHQIHZpMxacbFOAkJr
+# qAVkYZdz7ikNXTxV+GRb36tC4ByMNxE2DF7vFdvaiZP0CVZ5ByJ2gAhXMdK9+usx
+# zVk913qKde1OAuWdv+rndqkAIm8fUlRnr4saSCg7cIbUwCCf116wUJ7EuJDg0vHe
+# yhnCeHnBbyH3RZkHEi2ofmfgnFISJZDdMAeVZGVOh20Jp50XBzqokpPzeZ6zc1/g
+# yILNyiVgE+RPkjnUQshd1f1PMgn3tns2Cz7bJiVUaqEO3n9qRFgy5JuLae6UweGf
+# AeOo3dgLZxikKzYs3hDMaEtJq8IP71cX7QXe6lnMmXU/Hdfz2p897Zd+kU+vZvKI
+# 3cwLfuVQgK2RZ2z+Kc3K3dRPz2rXycK5XCuRZmvGab/WbrZiC7wJQapgBodltMI5
+# GMdFrBg9IeF7/rP4EqVQXeKtevTlZXjpuNhhjuR+2DMt/dWufjXpiW91bo3aH6Ea
+# jOALXmoxgltCp1K7hrS6gmsvj94cLRf50QQ4U8Qwggd6MIIFYqADAgECAgphDpDS
+# AAAAAAADMA0GCSqGSIb3DQEBCwUAMIGIMQswCQYDVQQGEwJVUzETMBEGA1UECBMK
+# V2FzaGluZ3RvbjEQMA4GA1UEBxMHUmVkbW9uZDEeMBwGA1UEChMVTWljcm9zb2Z0
+# IENvcnBvcmF0aW9uMTIwMAYDVQQDEylNaWNyb3NvZnQgUm9vdCBDZXJ0aWZpY2F0
+# ZSBBdXRob3JpdHkgMjAxMTAeFw0xMTA3MDgyMDU5MDlaFw0yNjA3MDgyMTA5MDla
+# MH4xCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdS
+# ZWRtb25kMR4wHAYDVQQKExVNaWNyb3NvZnQgQ29ycG9yYXRpb24xKDAmBgNVBAMT
+# H01pY3Jvc29mdCBDb2RlIFNpZ25pbmcgUENBIDIwMTEwggIiMA0GCSqGSIb3DQEB
+# AQUAA4ICDwAwggIKAoICAQCr8PpyEBwurdhuqoIQTTS68rZYIZ9CGypr6VpQqrgG
+# OBoESbp/wwwe3TdrxhLYC/A4wpkGsMg51QEUMULTiQ15ZId+lGAkbK+eSZzpaF7S
+# 35tTsgosw6/ZqSuuegmv15ZZymAaBelmdugyUiYSL+erCFDPs0S3XdjELgN1q2jz
+# y23zOlyhFvRGuuA4ZKxuZDV4pqBjDy3TQJP4494HDdVceaVJKecNvqATd76UPe/7
+# 4ytaEB9NViiienLgEjq3SV7Y7e1DkYPZe7J7hhvZPrGMXeiJT4Qa8qEvWeSQOy2u
+# M1jFtz7+MtOzAz2xsq+SOH7SnYAs9U5WkSE1JcM5bmR/U7qcD60ZI4TL9LoDho33
+# X/DQUr+MlIe8wCF0JV8YKLbMJyg4JZg5SjbPfLGSrhwjp6lm7GEfauEoSZ1fiOIl
+# XdMhSz5SxLVXPyQD8NF6Wy/VI+NwXQ9RRnez+ADhvKwCgl/bwBWzvRvUVUvnOaEP
+# 6SNJvBi4RHxF5MHDcnrgcuck379GmcXvwhxX24ON7E1JMKerjt/sW5+v/N2wZuLB
+# l4F77dbtS+dJKacTKKanfWeA5opieF+yL4TXV5xcv3coKPHtbcMojyyPQDdPweGF
+# RInECUzF1KVDL3SV9274eCBYLBNdYJWaPk8zhNqwiBfenk70lrC8RqBsmNLg1oiM
+# CwIDAQABo4IB7TCCAekwEAYJKwYBBAGCNxUBBAMCAQAwHQYDVR0OBBYEFEhuZOVQ
+# BdOCqhc3NyK1bajKdQKVMBkGCSsGAQQBgjcUAgQMHgoAUwB1AGIAQwBBMAsGA1Ud
+# DwQEAwIBhjAPBgNVHRMBAf8EBTADAQH/MB8GA1UdIwQYMBaAFHItOgIxkEO5FAVO
+# 4eqnxzHRI4k0MFoGA1UdHwRTMFEwT6BNoEuGSWh0dHA6Ly9jcmwubWljcm9zb2Z0
+# LmNvbS9wa2kvY3JsL3Byb2R1Y3RzL01pY1Jvb0NlckF1dDIwMTFfMjAxMV8wM18y
+# Mi5jcmwwXgYIKwYBBQUHAQEEUjBQME4GCCsGAQUFBzAChkJodHRwOi8vd3d3Lm1p
+# Y3Jvc29mdC5jb20vcGtpL2NlcnRzL01pY1Jvb0NlckF1dDIwMTFfMjAxMV8wM18y
+# Mi5jcnQwgZ8GA1UdIASBlzCBlDCBkQYJKwYBBAGCNy4DMIGDMD8GCCsGAQUFBwIB
+# FjNodHRwOi8vd3d3Lm1pY3Jvc29mdC5jb20vcGtpb3BzL2RvY3MvcHJpbWFyeWNw
+# cy5odG0wQAYIKwYBBQUHAgIwNB4yIB0ATABlAGcAYQBsAF8AcABvAGwAaQBjAHkA
+# XwBzAHQAYQB0AGUAbQBlAG4AdAAuIB0wDQYJKoZIhvcNAQELBQADggIBAGfyhqWY
+# 4FR5Gi7T2HRnIpsLlhHhY5KZQpZ90nkMkMFlXy4sPvjDctFtg/6+P+gKyju/R6mj
+# 82nbY78iNaWXXWWEkH2LRlBV2AySfNIaSxzzPEKLUtCw/WvjPgcuKZvmPRul1LUd
+# d5Q54ulkyUQ9eHoj8xN9ppB0g430yyYCRirCihC7pKkFDJvtaPpoLpWgKj8qa1hJ
+# Yx8JaW5amJbkg/TAj/NGK978O9C9Ne9uJa7lryft0N3zDq+ZKJeYTQ49C/IIidYf
+# wzIY4vDFLc5bnrRJOQrGCsLGra7lstnbFYhRRVg4MnEnGn+x9Cf43iw6IGmYslmJ
+# aG5vp7d0w0AFBqYBKig+gj8TTWYLwLNN9eGPfxxvFX1Fp3blQCplo8NdUmKGwx1j
+# NpeG39rz+PIWoZon4c2ll9DuXWNB41sHnIc+BncG0QaxdR8UvmFhtfDcxhsEvt9B
+# xw4o7t5lL+yX9qFcltgA1qFGvVnzl6UJS0gQmYAf0AApxbGbpT9Fdx41xtKiop96
+# eiL6SJUfq/tHI4D1nvi/a7dLl+LrdXga7Oo3mXkYS//WsyNodeav+vyL6wuA6mk7
+# r/ww7QRMjt/fdW1jkT3RnVZOT7+AVyKheBEyIXrvQQqxP/uozKRdwaGIm1dxVk5I
+# RcBCyZt2WwqASGv9eZ/BvW1taslScxMNelDNMYIVZzCCFWMCAQEwgZUwfjELMAkG
+# A1UEBhMCVVMxEzARBgNVBAgTCldhc2hpbmd0b24xEDAOBgNVBAcTB1JlZG1vbmQx
+# HjAcBgNVBAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEoMCYGA1UEAxMfTWljcm9z
+# b2Z0IENvZGUgU2lnbmluZyBQQ0EgMjAxMQITMwAAAYdyF3IVWUDHCQAAAAABhzAN
+# BglghkgBZQMEAgEFAKCBrjAZBgkqhkiG9w0BCQMxDAYKKwYBBAGCNwIBBDAcBgor
+# BgEEAYI3AgELMQ4wDAYKKwYBBAGCNwIBFTAvBgkqhkiG9w0BCQQxIgQgE/MRhWyu
+# Zg+EA2WKcxYC31nHVCTE6guHppZppc70RtkwQgYKKwYBBAGCNwIBDDE0MDKgFIAS
+# AE0AaQBjAHIAbwBzAG8AZgB0oRqAGGh0dHA6Ly93d3cubWljcm9zb2Z0LmNvbTAN
+# BgkqhkiG9w0BAQEFAASCAQBvcYCjRDXUYEIz9j2j0r4GFI2Y3g/CoNxDDBaeQ+gV
+# khO0fK0oLh18RbV271Mg6SF7X7+mXB5MnL68voVQDqHnsCYrIAuMF/AEpv9YuDDp
+# ZRJuqN7Vwg3HM02l/FyATBIMgf/V79aYzJL3jjtt9bRIyxk6aPU4XcwMeA4usnUQ
+# rMhIiQz07DgfSrcQWe4AvGFAIvqTAKE4P944EZWWVnWI/10rvatEAefqJZX3XljW
+# sK/6NY/0MyAyiILOuXbvVS0YFbHaR2qd1jUXbrY79fS+H4Ts6qnbufOkHQvmcDxs
+# 801wKLHumMdPTtMVzfVMCwPvrHP0wtzsFlmCcKjBbGpvoYIS8TCCEu0GCisGAQQB
+# gjcDAwExghLdMIIS2QYJKoZIhvcNAQcCoIISyjCCEsYCAQMxDzANBglghkgBZQME
+# AgEFADCCAVUGCyqGSIb3DQEJEAEEoIIBRASCAUAwggE8AgEBBgorBgEEAYRZCgMB
+# MDEwDQYJYIZIAWUDBAIBBQAEINdeoXtuzW+Dihw6n+VdG+91si0f6TvWhJXaPtvW
+# oF4cAgZfu+i3IT8YEzIwMjAxMjE3MDYzMDM2LjU0M1owBIACAfSggdSkgdEwgc4x
+# CzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRt
+# b25kMR4wHAYDVQQKExVNaWNyb3NvZnQgQ29ycG9yYXRpb24xKTAnBgNVBAsTIE1p
+# Y3Jvc29mdCBPcGVyYXRpb25zIFB1ZXJ0byBSaWNvMSYwJAYDVQQLEx1UaGFsZXMg
+# VFNTIEVTTjo4OTdBLUUzNTYtMTcwMTElMCMGA1UEAxMcTWljcm9zb2Z0IFRpbWUt
+# U3RhbXAgU2VydmljZaCCDkQwggT1MIID3aADAgECAhMzAAABLCKvRZd1+RvuAAAA
+# AAEsMA0GCSqGSIb3DQEBCwUAMHwxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpXYXNo
+# aW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNyb3NvZnQgQ29y
+# cG9yYXRpb24xJjAkBgNVBAMTHU1pY3Jvc29mdCBUaW1lLVN0YW1wIFBDQSAyMDEw
+# MB4XDTE5MTIxOTAxMTUwM1oXDTIxMDMxNzAxMTUwM1owgc4xCzAJBgNVBAYTAlVT
+# MRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQK
+# ExVNaWNyb3NvZnQgQ29ycG9yYXRpb24xKTAnBgNVBAsTIE1pY3Jvc29mdCBPcGVy
+# YXRpb25zIFB1ZXJ0byBSaWNvMSYwJAYDVQQLEx1UaGFsZXMgVFNTIEVTTjo4OTdB
+# LUUzNTYtMTcwMTElMCMGA1UEAxMcTWljcm9zb2Z0IFRpbWUtU3RhbXAgU2Vydmlj
+# ZTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAPK1zgSSq+MxAYo3qpCt
+# QDxSMPPJy6mm/wfEJNjNUnYtLFBwl1BUS5trEk/t41ldxITKehs+ABxYqo4Qxsg3
+# Gy1ugKiwHAnYiiekfC+ZhptNFgtnDZIn45zC0AlVr/6UfLtsLcHCh1XElLUHfEC0
+# nBuQcM/SpYo9e3l1qY5NdMgDGxCsmCKdiZfYXIu+U0UYIBhdzmSHnB3fxZOBVcr5
+# htFHEBBNt/rFJlm/A4yb8oBsp+Uf0p5QwmO/bCcdqB15JpylOhZmWs0sUfJKlK9E
+# rAhBwGki2eIRFKsQBdkXS9PWpF1w2gIJRvSkDEaCf+lbGTPdSzHSbfREWOF9wY3i
+# Yj8CAwEAAaOCARswggEXMB0GA1UdDgQWBBRRahZSGfrCQhCyIyGH9DkiaW7L0zAf
+# BgNVHSMEGDAWgBTVYzpcijGQ80N7fEYbxTNoWoVtVTBWBgNVHR8ETzBNMEugSaBH
+# hkVodHRwOi8vY3JsLm1pY3Jvc29mdC5jb20vcGtpL2NybC9wcm9kdWN0cy9NaWNU
+# aW1TdGFQQ0FfMjAxMC0wNy0wMS5jcmwwWgYIKwYBBQUHAQEETjBMMEoGCCsGAQUF
+# BzAChj5odHRwOi8vd3d3Lm1pY3Jvc29mdC5jb20vcGtpL2NlcnRzL01pY1RpbVN0
+# YVBDQV8yMDEwLTA3LTAxLmNydDAMBgNVHRMBAf8EAjAAMBMGA1UdJQQMMAoGCCsG
+# AQUFBwMIMA0GCSqGSIb3DQEBCwUAA4IBAQBPFxHIwi4vAH49w9Svmz6K3tM55RlW
+# 5pPeULXdut2Rqy6Ys0+VpZsbuaEoxs6Z1C3hMbkiqZFxxyltxJpuHTyGTg61zfNI
+# F5n6RsYF3s7IElDXNfZznF1/2iWc6uRPZK8rxxUJ/7emYXZCYwuUY0XjsCpP9pbR
+# RKeJi6r5arSyI+NfKxvgoM21JNt1BcdlXuAecdd/k8UjxCscffanoK2n6LFw1PcZ
+# lEO7NId7o+soM2C0QY5BYdghpn7uqopB6ixyFIIkDXFub+1E7GmAEwfU6VwEHL7y
+# 9rNE8bd+JrQs+yAtkkHy9FmXg/PsGq1daVzX1So7CJ6nyphpuHSN3VfTMIIGcTCC
+# BFmgAwIBAgIKYQmBKgAAAAAAAjANBgkqhkiG9w0BAQsFADCBiDELMAkGA1UEBhMC
+# VVMxEzARBgNVBAgTCldhc2hpbmd0b24xEDAOBgNVBAcTB1JlZG1vbmQxHjAcBgNV
+# BAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEyMDAGA1UEAxMpTWljcm9zb2Z0IFJv
+# b3QgQ2VydGlmaWNhdGUgQXV0aG9yaXR5IDIwMTAwHhcNMTAwNzAxMjEzNjU1WhcN
+# MjUwNzAxMjE0NjU1WjB8MQswCQYDVQQGEwJVUzETMBEGA1UECBMKV2FzaGluZ3Rv
+# bjEQMA4GA1UEBxMHUmVkbW9uZDEeMBwGA1UEChMVTWljcm9zb2Z0IENvcnBvcmF0
+# aW9uMSYwJAYDVQQDEx1NaWNyb3NvZnQgVGltZS1TdGFtcCBQQ0EgMjAxMDCCASIw
+# DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKkdDbx3EYo6IOz8E5f1+n9plGt0
+# VBDVpQoAgoX77XxoSyxfxcPlYcJ2tz5mK1vwFVMnBDEfQRsalR3OCROOfGEwWbEw
+# RA/xYIiEVEMM1024OAizQt2TrNZzMFcmgqNFDdDq9UeBzb8kYDJYYEbyWEeGMoQe
+# dGFnkV+BVLHPk0ySwcSmXdFhE24oxhr5hoC732H8RsEnHSRnEnIaIYqvS2SJUGKx
+# Xf13Hz3wV3WsvYpCTUBR0Q+cBj5nf/VmwAOWRH7v0Ev9buWayrGo8noqCjHw2k4G
+# kbaICDXoeByw6ZnNPOcvRLqn9NxkvaQBwSAJk3jN/LzAyURdXhacAQVPIk0CAwEA
+# AaOCAeYwggHiMBAGCSsGAQQBgjcVAQQDAgEAMB0GA1UdDgQWBBTVYzpcijGQ80N7
+# fEYbxTNoWoVtVTAZBgkrBgEEAYI3FAIEDB4KAFMAdQBiAEMAQTALBgNVHQ8EBAMC
+# AYYwDwYDVR0TAQH/BAUwAwEB/zAfBgNVHSMEGDAWgBTV9lbLj+iiXGJo0T2UkFvX
+# zpoYxDBWBgNVHR8ETzBNMEugSaBHhkVodHRwOi8vY3JsLm1pY3Jvc29mdC5jb20v
+# cGtpL2NybC9wcm9kdWN0cy9NaWNSb29DZXJBdXRfMjAxMC0wNi0yMy5jcmwwWgYI
+# KwYBBQUHAQEETjBMMEoGCCsGAQUFBzAChj5odHRwOi8vd3d3Lm1pY3Jvc29mdC5j
+# b20vcGtpL2NlcnRzL01pY1Jvb0NlckF1dF8yMDEwLTA2LTIzLmNydDCBoAYDVR0g
+# AQH/BIGVMIGSMIGPBgkrBgEEAYI3LgMwgYEwPQYIKwYBBQUHAgEWMWh0dHA6Ly93
+# d3cubWljcm9zb2Z0LmNvbS9QS0kvZG9jcy9DUFMvZGVmYXVsdC5odG0wQAYIKwYB
+# BQUHAgIwNB4yIB0ATABlAGcAYQBsAF8AUABvAGwAaQBjAHkAXwBTAHQAYQB0AGUA
+# bQBlAG4AdAAuIB0wDQYJKoZIhvcNAQELBQADggIBAAfmiFEN4sbgmD+BcQM9naOh
+# IW+z66bM9TG+zwXiqf76V20ZMLPCxWbJat/15/B4vceoniXj+bzta1RXCCtRgkQS
+# +7lTjMz0YBKKdsxAQEGb3FwX/1z5Xhc1mCRWS3TvQhDIr79/xn/yN31aPxzymXlK
+# kVIArzgPF/UveYFl2am1a+THzvbKegBvSzBEJCI8z+0DpZaPWSm8tv0E4XCfMkon
+# /VWvL/625Y4zu2JfmttXQOnxzplmkIz/amJ/3cVKC5Em4jnsGUpxY517IW3DnKOi
+# PPp/fZZqkHimbdLhnPkd/DjYlPTGpQqWhqS9nhquBEKDuLWAmyI4ILUl5WTs9/S/
+# fmNZJQ96LjlXdqJxqgaKD4kWumGnEcua2A5HmoDF0M2n0O99g/DhO3EJ3110mCII
+# YdqwUB5vvfHhAN/nMQekkzr3ZUd46PioSKv33nJ+YWtvd6mBy6cJrDm77MbL2IK0
+# cs0d9LiFAR6A+xuJKlQ5slvayA1VmXqHczsI5pgt6o3gMy4SKfXAL1QnIffIrE7a
+# KLixqduWsqdCosnPGUFN4Ib5KpqjEWYw07t0MkvfY3v1mYovG8chr1m1rtxEPJdQ
+# cdeh0sVV42neV8HR3jDA/czmTfsNv11P6Z0eGTgvvM9YBS7vDaBQNdrvCScc1bN+
+# NR4Iuto229Nfj950iEkSoYIC0jCCAjsCAQEwgfyhgdSkgdEwgc4xCzAJBgNVBAYT
+# AlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYD
+# VQQKExVNaWNyb3NvZnQgQ29ycG9yYXRpb24xKTAnBgNVBAsTIE1pY3Jvc29mdCBP
+# cGVyYXRpb25zIFB1ZXJ0byBSaWNvMSYwJAYDVQQLEx1UaGFsZXMgVFNTIEVTTjo4
+# OTdBLUUzNTYtMTcwMTElMCMGA1UEAxMcTWljcm9zb2Z0IFRpbWUtU3RhbXAgU2Vy
+# dmljZaIjCgEBMAcGBSsOAwIaAxUADE5OKSMoNx/mYxYWap1RTOohbJ2ggYMwgYCk
+# fjB8MQswCQYDVQQGEwJVUzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMH
+# UmVkbW9uZDEeMBwGA1UEChMVTWljcm9zb2Z0IENvcnBvcmF0aW9uMSYwJAYDVQQD
+# Ex1NaWNyb3NvZnQgVGltZS1TdGFtcCBQQ0EgMjAxMDANBgkqhkiG9w0BAQUFAAIF
+# AOOFYaowIhgPMjAyMDEyMTcwODQ4NDJaGA8yMDIwMTIxODA4NDg0MlowdzA9Bgor
+# BgEEAYRZCgQBMS8wLTAKAgUA44VhqgIBADAKAgEAAgIoWgIB/zAHAgEAAgISJTAK
+# AgUA44azKgIBADA2BgorBgEEAYRZCgQCMSgwJjAMBgorBgEEAYRZCgMCoAowCAIB
+# AAIDB6EgoQowCAIBAAIDAYagMA0GCSqGSIb3DQEBBQUAA4GBAB53NDoDDF4vqFWY
+# fwUnSvAy3z0CtqSFeA9RzDKGklPRwVkya5DtmVBDTZUbVQ2ST9hvRAVxhktfyVBZ
+# ewapGJsvwMhg7nnEqBOumt6TvueIZpbs+p5z//3+iFYGkT3YFQI0Gd2JkvgBxfs5
+# +GptO6JKtiyA+zkKijxqXZvMqMxBMYIDDTCCAwkCAQEwgZMwfDELMAkGA1UEBhMC
+# VVMxEzARBgNVBAgTCldhc2hpbmd0b24xEDAOBgNVBAcTB1JlZG1vbmQxHjAcBgNV
+# BAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEmMCQGA1UEAxMdTWljcm9zb2Z0IFRp
+# bWUtU3RhbXAgUENBIDIwMTACEzMAAAEsIq9Fl3X5G+4AAAAAASwwDQYJYIZIAWUD
+# BAIBBQCgggFKMBoGCSqGSIb3DQEJAzENBgsqhkiG9w0BCRABBDAvBgkqhkiG9w0B
+# CQQxIgQg3wEUtEvxwCp3aAFB2vGXOOqg/AXHyXZh9P9J+0uArDMwgfoGCyqGSIb3
+# DQEJEAIvMYHqMIHnMIHkMIG9BCBbn/0uFFh42hTM5XOoKdXevBaiSxmYK9Ilcn9n
+# u5ZH4TCBmDCBgKR+MHwxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9u
+# MRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNyb3NvZnQgQ29ycG9yYXRp
+# b24xJjAkBgNVBAMTHU1pY3Jvc29mdCBUaW1lLVN0YW1wIFBDQSAyMDEwAhMzAAAB
+# LCKvRZd1+RvuAAAAAAEsMCIEINBRtGID6jvA2ptfwIuPyG7qPcLRYb9YrJ8aKfVg
+# TulFMA0GCSqGSIb3DQEBCwUABIIBACQQpFGWW6JmH5MTKwhaE/8+gyzI2bT8XJnA
+# t8k7PHFvEGA7whgp9eNgW+wWJm1gnsmswjx2l7FW4DLg9lghM8FK77JRCg7CJfse
+# dSbnTv81/4VhSXOAO0jMP2dALP7DF59vQmlDh50u8/Wu61ActMOt6cArkoUhBRXO
+# LnqOQCOEEku5Xy2ES9g9eUfLUvTvlWo6HiAq+cJnNV08QRBOnGWRxdwy8YJ5vwNW
+# Pwx0ZG3rTvMtGzOaW6Ve5O36H2ynoEdzCmpakeDaF2sZ86/LNERKyIXiykV/Uig1
+# SZh2VLY/Yni9SCVHbYgvTOCh5ZZE5eOi6BwLf0T4xl5alHUx+AA=
+# SIG # End signature block

src/Misc/dotnet-install.sh

@@ -40,7 +40,7 @@ if [ -t 1 ] && command -v tput > /dev/null; then
 fi
 
 say_warning() {
-    printf "%b\n" "${yellow:-}dotnet_install: Warning: $1${normal:-}"
+    printf "%b\n" "${yellow:-}dotnet_install: Warning: $1${normal:-}" >&3
 }
 
 say_err() {
@@ -183,6 +183,9 @@ get_current_os_name() {
         elif is_musl_based_distro; then
             echo "linux-musl"
             return 0
+        elif [ "$linux_platform_name" = "linux-musl" ]; then
+            echo "linux-musl"
+            return 0
         else
             echo "linux"
             return 0
@@ -241,42 +244,6 @@ check_min_reqs() {
     return 0
 }
 
-check_pre_reqs() {
-    eval $invocation
-
-    if [ "${DOTNET_INSTALL_SKIP_PREREQS:-}" = "1" ]; then
-        return 0
-    fi
-
-    if [ "$(uname)" = "Linux" ]; then
-        if is_musl_based_distro; then
-            if ! command -v scanelf > /dev/null; then
-                say_warning "scanelf not found, please install pax-utils package."
-                return 0
-            fi
-            LDCONFIG_COMMAND="scanelf --ldpath -BF '%f'"
-            [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep libintl)" ] && say_warning "Unable to locate libintl. Probable prerequisite missing; install libintl (or gettext)."
-        else
-            if [ ! -x "$(command -v ldconfig)" ]; then
-                say_verbose "ldconfig is not in PATH, trying /sbin/ldconfig."
-                LDCONFIG_COMMAND="/sbin/ldconfig"
-            else
-                LDCONFIG_COMMAND="ldconfig"
-            fi
-            local librarypath=${LD_LIBRARY_PATH:-}
-            LDCONFIG_COMMAND="$LDCONFIG_COMMAND -NXv ${librarypath//:/ }"
-        fi
-
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep zlib)" ] && say_warning "Unable to locate zlib. Probable prerequisite missing; install zlib."
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep ssl)" ] && say_warning "Unable to locate libssl. Probable prerequisite missing; install libssl."
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep libicu)" ] && say_warning "Unable to locate libicu. Probable prerequisite missing; install libicu."
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep lttng)" ] && say_warning "Unable to locate liblttng. Probable prerequisite missing; install libcurl."
-        [ -z "$($LDCONFIG_COMMAND 2>/dev/null | grep libcurl)" ] && say_warning "Unable to locate libcurl. Probable prerequisite missing; install libcurl."
-    fi
-
-    return 0
-}
-
 # args:
 # input - $1
 to_lowercase() {
@@ -332,7 +299,7 @@ get_machine_architecture() {
     if command -v uname > /dev/null; then
         CPUName=$(uname -m)
         case $CPUName in
-        armv7l)
+        armv*l)
             echo "arm"
             return 0
             ;;
@@ -373,10 +340,34 @@ get_normalized_architecture_from_architecture() {
             ;;
     esac
 
-    say_err "Architecture \`$architecture\` not supported. If you think this is a bug, report it at https://github.com/dotnet/sdk/issues"
+    say_err "Architecture \`$architecture\` not supported. If you think this is a bug, report it at https://github.com/dotnet/install-scripts/issues"
     return 1
 }
 
+# args:
+# user_defined_os - $1
+get_normalized_os() {
+    eval $invocation
+
+    local osname="$(to_lowercase "$1")"
+    if [ ! -z "$osname" ]; then
+        case "$osname" in
+            osx | freebsd | rhel.6 | linux-musl | linux)
+                echo "$osname"
+                return 0
+                ;;
+            *)
+                say_err "'$user_defined_os' is not a supported value for --os option, supported values are: osx, linux, linux-musl, freebsd, rhel.6. If you think this is a bug, report it at https://github.com/dotnet/install-scripts/issues."
+                return 1
+                ;;
+        esac
+    else
+        osname="$(get_current_os_name)" || return 1
+    fi
+    echo "$osname"
+    return 0
+}
+
 # The version text returned from the feeds is a 1-line or 2-line string:
 # For the SDK and the dotnet runtime (2 lines):
 # Line 1: # commit_hash
@@ -418,14 +409,12 @@ is_dotnet_package_installed() {
 # azure_feed - $1
 # channel - $2
 # normalized_architecture - $3
-# coherent - $4
 get_latest_version_info() {
     eval $invocation
 
     local azure_feed="$1"
     local channel="$2"
     local normalized_architecture="$3"
-    local coherent="$4"
 
     local version_file_url=null
     if [[ "$runtime" == "dotnet" ]]; then
@@ -433,11 +422,7 @@ get_latest_version_info() {
     elif [[ "$runtime" == "aspnetcore" ]]; then
         version_file_url="$uncached_feed/aspnetcore/Runtime/$channel/latest.version"
     elif [ -z "$runtime" ]; then
-        if [ "$coherent" = true ]; then
+         version_file_url="$uncached_feed/Sdk/$channel/latest.version"
-            version_file_url="$uncached_feed/Sdk/$channel/latest.coherent.version"
-        else
-            version_file_url="$uncached_feed/Sdk/$channel/latest.version"
-        fi
     else
         say_err "Invalid value for \$runtime"
         return 1
@@ -468,7 +453,6 @@ parse_jsonfile_for_version() {
     sdk_list=$(echo $sdk_section | awk -F"[{}]" '{print $2}')
     sdk_list=${sdk_list//[\" ]/}
     sdk_list=${sdk_list//,/$'\n'}
-    sdk_list="$(echo -e "${sdk_list}" | tr -d '[[:space:]]')"
 
     local version_info=""
     while read -r line; do
@@ -505,26 +489,16 @@ get_specific_version_from_version() {
     local json_file="$5"
 
     if [ -z "$json_file" ]; then
-        case "$version" in
+        if [[ "$version" == "latest" ]]; then 
-            latest)
+            local version_info
-                local version_info
+            version_info="$(get_latest_version_info "$azure_feed" "$channel" "$normalized_architecture" false)" || return 1
-                version_info="$(get_latest_version_info "$azure_feed" "$channel" "$normalized_architecture" false)" || return 1
+            say_verbose "get_specific_version_from_version: version_info=$version_info"
-                say_verbose "get_specific_version_from_version: version_info=$version_info"
+            echo "$version_info" | get_version_from_version_info
-                echo "$version_info" | get_version_from_version_info
+            return 0
-                return 0
+        else
-                ;;
+            echo "$version"
-            coherent)
+            return 0
-                local version_info
+        fi
-                version_info="$(get_latest_version_info "$azure_feed" "$channel" "$normalized_architecture" true)" || return 1
-                say_verbose "get_specific_version_from_version: version_info=$version_info"
-                echo "$version_info" | get_version_from_version_info
-                return 0
-                ;;
-            *)
-                echo "$version"
-                return 0
-                ;;
-        esac
     else
         local version_info
         version_info="$(parse_jsonfile_for_version "$json_file")" || return 1
@@ -538,6 +512,7 @@ get_specific_version_from_version() {
 # channel - $2
 # normalized_architecture - $3
 # specific_version - $4
+# normalized_os - $5
 construct_download_link() {
     eval $invocation
 
@@ -545,17 +520,16 @@ construct_download_link() {
     local channel="$2"
     local normalized_architecture="$3"
     local specific_version="${4//[$'\t\r\n']}"
-
+    local specific_product_version="$(get_specific_product_version "$1" "$4")"
-    local osname
+    local osname="$5"
-    osname="$(get_current_os_name)" || return 1
+    
-
     local download_link=null
     if [[ "$runtime" == "dotnet" ]]; then
-        download_link="$azure_feed/Runtime/$specific_version/dotnet-runtime-$specific_version-$osname-$normalized_architecture.tar.gz"
+        download_link="$azure_feed/Runtime/$specific_version/dotnet-runtime-$specific_product_version-$osname-$normalized_architecture.tar.gz"
     elif [[ "$runtime" == "aspnetcore" ]]; then
-        download_link="$azure_feed/aspnetcore/Runtime/$specific_version/aspnetcore-runtime-$specific_version-$osname-$normalized_architecture.tar.gz"
+        download_link="$azure_feed/aspnetcore/Runtime/$specific_version/aspnetcore-runtime-$specific_product_version-$osname-$normalized_architecture.tar.gz"
     elif [ -z "$runtime" ]; then
-        download_link="$azure_feed/Sdk/$specific_version/dotnet-sdk-$specific_version-$osname-$normalized_architecture.tar.gz"
+        download_link="$azure_feed/Sdk/$specific_version/dotnet-sdk-$specific_product_version-$osname-$normalized_architecture.tar.gz"
     else
         return 1
     fi
@@ -564,6 +538,50 @@ construct_download_link() {
     return 0
 }
 
+# args:
+# azure_feed - $1
+# specific_version - $2
+get_specific_product_version() {
+    # If we find a 'productVersion.txt' at the root of any folder, we'll use its contents 
+    # to resolve the version of what's in the folder, superseding the specified version.
+    eval $invocation
+
+    local azure_feed="$1"
+    local specific_version="${2//[$'\t\r\n']}"
+    local specific_product_version=$specific_version
+
+    local download_link=null
+    if [[ "$runtime" == "dotnet" ]]; then
+        download_link="$azure_feed/Runtime/$specific_version/productVersion.txt${feed_credential}"
+    elif [[ "$runtime" == "aspnetcore" ]]; then
+        download_link="$azure_feed/aspnetcore/Runtime/$specific_version/productVersion.txt${feed_credential}"
+    elif [ -z "$runtime" ]; then
+        download_link="$azure_feed/Sdk/$specific_version/productVersion.txt${feed_credential}"
+    else
+        return 1
+    fi
+
+    if machine_has "curl"
+    then
+        specific_product_version=$(curl -s --fail "$download_link")
+        if [ $? -ne 0 ]
+        then
+            specific_product_version=$specific_version
+        fi
+    elif machine_has "wget"
+    then
+        specific_product_version=$(wget -qO- "$download_link")
+        if [ $? -ne 0 ]
+        then
+            specific_product_version=$specific_version
+        fi
+    fi
+    specific_product_version="${specific_product_version//[$'\t\r\n']}"
+
+    echo "$specific_product_version"
+    return 0
+}
+
 # args:
 # azure_feed - $1
 # channel - $2
@@ -684,11 +702,31 @@ extract_dotnet_package() {
     find "$temp_out_path" -type f | grep -Ev "$folders_with_version_regex" | copy_files_or_dirs_from_list "$temp_out_path" "$out_path" "$override_non_versioned_files"
 
     rm -rf "$temp_out_path"
+    rm -f "$zip_path" && say_verbose "Temporary zip file $zip_path was removed"
 
     if [ "$failed" = true ]; then
         say_err "Extraction failed"
         return 1
     fi
+    return 0
+}
+
+get_http_header_curl() {
+    eval $invocation
+    local remote_path="$1"
+    remote_path_with_credential="${remote_path}${feed_credential}"
+    curl_options="-I -sSL --retry 5 --retry-delay 2 --connect-timeout 15 "
+    curl $curl_options "$remote_path_with_credential" || return 1
+    return 0
+}
+
+get_http_header_wget() {
+    eval $invocation
+    local remote_path="$1"
+    remote_path_with_credential="${remote_path}${feed_credential}"
+    wget_options="-q -S --spider --tries 5 --waitretry 2 --connect-timeout 15 "
+    wget $wget_options "$remote_path_with_credential" 2>&1 || return 1
+    return 0
 }
 
 # args:
@@ -720,44 +758,56 @@ download() {
     return 0
 }
 
+# Updates global variables $http_code and $download_error_msg
 downloadcurl() {
     eval $invocation
     local remote_path="$1"
     local out_path="${2:-}"
-
     # Append feed_credential as late as possible before calling curl to avoid logging feed_credential
-    remote_path="${remote_path}${feed_credential}"
+    local remote_path_with_credential="${remote_path}${feed_credential}"
-
     local curl_options="--retry 20 --retry-delay 2 --connect-timeout 15 -sSL -f --create-dirs "
     local failed=false
     if [ -z "$out_path" ]; then
-        curl $curl_options "$remote_path" || failed=true
+        curl $curl_options "$remote_path_with_credential" || failed=true
     else
-        curl $curl_options -o "$out_path" "$remote_path" || failed=true
+        curl $curl_options -o "$out_path" "$remote_path_with_credential" || failed=true
     fi
     if [ "$failed" = true ]; then
-        say_verbose "Curl download failed"
+        local response=$(get_http_header_curl $remote_path_with_credential)
+        http_code=$( echo "$response" | awk '/^HTTP/{print $2}' | tail -1 )
+        download_error_msg="Unable to download $remote_path."
+        if  [[ $http_code != 2* ]]; then
+            download_error_msg+=" Returned HTTP status code: $http_code."
+        fi
+        say_verbose "$download_error_msg"
         return 1
     fi
     return 0
 }
 
+
+# Updates global variables $http_code and $download_error_msg
 downloadwget() {
     eval $invocation
     local remote_path="$1"
     local out_path="${2:-}"
-
     # Append feed_credential as late as possible before calling wget to avoid logging feed_credential
-    remote_path="${remote_path}${feed_credential}"
+    local remote_path_with_credential="${remote_path}${feed_credential}"
     local wget_options="--tries 20 --waitretry 2 --connect-timeout 15 "
     local failed=false
     if [ -z "$out_path" ]; then
-        wget -q $wget_options -O - "$remote_path" || failed=true
+        wget -q $wget_options -O - "$remote_path_with_credential" || failed=true
     else
-        wget $wget_options -O "$out_path" "$remote_path" || failed=true
+        wget $wget_options -O "$out_path" "$remote_path_with_credential" || failed=true
     fi
     if [ "$failed" = true ]; then
-        say_verbose "Wget download failed"
+        local response=$(get_http_header_wget $remote_path_with_credential)
+        http_code=$( echo "$response" | awk '/^  HTTP/{print $2}' | tail -1 )
+        download_error_msg="Unable to download $remote_path."
+        if  [[ $http_code != 2* ]]; then
+            download_error_msg+=" Returned HTTP status code: $http_code."
+        fi
+        say_verbose "$download_error_msg"
         return 1
     fi
     return 0
@@ -770,14 +820,18 @@ calculate_vars() {
     normalized_architecture="$(get_normalized_architecture_from_architecture "$architecture")"
     say_verbose "normalized_architecture=$normalized_architecture"
 
+    normalized_os="$(get_normalized_os "$user_defined_os")"
+    say_verbose "normalized_os=$normalized_os"
+
     specific_version="$(get_specific_version_from_version "$azure_feed" "$channel" "$normalized_architecture" "$version" "$json_file")"
+    specific_product_version="$(get_specific_product_version "$azure_feed" "$specific_version")"
     say_verbose "specific_version=$specific_version"
     if [ -z "$specific_version" ]; then
         say_err "Could not resolve version information."
         return 1
     fi
 
-    download_link="$(construct_download_link "$azure_feed" "$channel" "$normalized_architecture" "$specific_version")"
+    download_link="$(construct_download_link "$azure_feed" "$channel" "$normalized_architecture" "$specific_version" "$normalized_os")"
     say_verbose "Constructed primary named payload URL: $download_link"
 
     legacy_download_link="$(construct_legacy_download_link "$azure_feed" "$channel" "$normalized_architecture" "$specific_version")" || valid_legacy_download_link=false
@@ -822,38 +876,76 @@ install_dotnet() {
     zip_path="$(mktemp "$temporary_file_template")"
     say_verbose "Zip path: $zip_path"
 
-    say "Downloading link: $download_link"
 
     # Failures are normal in the non-legacy case for ultimately legacy downloads.
     # Do not output to stderr, since output to stderr is considered an error.
+    say "Downloading primary link $download_link"
+
+    # The download function will set variables $http_code and $download_error_msg in case of failure.
+    http_code=""; download_error_msg=""
     download "$download_link" "$zip_path" 2>&1 || download_failed=true
+    primary_path_http_code="$http_code"; primary_path_download_error_msg="$download_error_msg"
 
     #  if the download fails, download the legacy_download_link
     if [ "$download_failed" = true ]; then
-        say "Cannot download: $download_link"
+        case $primary_path_http_code in
-
+        404)
+            say "The resource at $download_link is not available."
+            ;;
+        *)
+            say "$primary_path_download_error_msg"
+            ;;
+        esac
+        rm -f "$zip_path" 2>&1 && say_verbose "Temporary zip file $zip_path was removed"
         if [ "$valid_legacy_download_link" = true ]; then
             download_failed=false
             download_link="$legacy_download_link"
             zip_path="$(mktemp "$temporary_file_template")"
             say_verbose "Legacy zip path: $zip_path"
-            say "Downloading legacy link: $download_link"
+
+            say "Downloading legacy link $download_link"
+
+            # The download function will set variables $http_code and $download_error_msg in case of failure.
+            http_code=""; download_error_msg=""
             download "$download_link" "$zip_path" 2>&1 || download_failed=true
+            legacy_path_http_code="$http_code";  legacy_path_download_error_msg="$download_error_msg"
 
             if [ "$download_failed" = true ]; then
-                say "Cannot download: $download_link"
+                case $legacy_path_http_code in
+                404)
+                    say "The resource at $download_link is not available."
+                    ;;
+                *)
+                    say "$legacy_path_download_error_msg"
+                    ;;
+                esac
+                rm -f "$zip_path" 2>&1 && say_verbose "Temporary zip file $zip_path was removed"
             fi
         fi
     fi
 
     if [ "$download_failed" = true ]; then
-        say_err "Could not find/download: \`$asset_name\` with version = $specific_version"
+        if [[ "$primary_path_http_code" = "404" && ( "$valid_legacy_download_link" = false || "$legacy_path_http_code" = "404") ]]; then
-        say_err "Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support"
+            say_err "Could not find \`$asset_name\` with version = $specific_version"
+            say_err "Refer to: https://aka.ms/dotnet-os-lifecycle for information on .NET Core support"
+        else
+            say_err "Could not download: \`$asset_name\` with version = $specific_version"
+            # 404-NotFound is an expected response if it goes from only one of the links, do not show that error.
+            # If primary path is available (not 404-NotFound) then show the primary error else show the legacy error.
+            if [ "$primary_path_http_code" != "404" ]; then
+                say_err "$primary_path_download_error_msg"
+                return 1
+            fi
+            if [[ "$valid_legacy_download_link" = true  && "$legacy_path_http_code" != "404" ]]; then
+                say_err "$legacy_path_download_error_msg"
+                return 1
+            fi
+        fi
         return 1
     fi
 
     say "Extracting zip from $download_link"
-    extract_dotnet_package "$zip_path" "$install_root"
+    extract_dotnet_package "$zip_path" "$install_root" || return 1
 
     #  Check if the SDK version is installed; if not, fail the installation.
     # if the version contains "RTM" or "servicing"; check if a 'release-type' SDK version is installed.
@@ -869,12 +961,14 @@ install_dotnet() {
     fi
 
     #  Check if the standard SDK version is installed.
-    say_verbose "Checking installation: version = $specific_version"
+    say_verbose "Checking installation: version = $specific_product_version"
-    if is_dotnet_package_installed "$install_root" "$asset_relative_path" "$specific_version"; then
+    if is_dotnet_package_installed "$install_root" "$asset_relative_path" "$specific_product_version"; then
         return 0
     fi
 
-    say_err "\`$asset_name\` with version = $specific_version failed to install with an unknown error."
+    # Version verification failed. More likely something is wrong either with the downloaded content or with the verification algorithm.
+    say_err "Failed to verify the version of installed \`$asset_name\`.\nInstallation source: $download_link.\nInstallation location: $install_root.\nReport the bug at https://github.com/dotnet/install-scripts/issues."
+    say_err "\`$asset_name\` with version = $specific_product_version failed to install with an unknown error."
     return 1
 }
 
@@ -900,6 +994,7 @@ runtime=""
 runtime_id=""
 override_non_versioned_files=true
 non_dynamic_parameters=""
+user_defined_os=""
 
 while [ $# -ne 0 ]
 do
@@ -921,6 +1016,10 @@ do
             shift
             architecture="$1"
             ;;
+        --os|-[Oo][SS])
+            shift
+            user_defined_os="$1"
+            ;;
         --shared-runtime|-[Ss]hared[Rr]untime)
             say_warning "The --shared-runtime flag is obsolete and may be removed in a future version of this script. The recommended usage is to specify '--runtime dotnet'."
             if [ -z "$runtime" ]; then
@@ -972,6 +1071,7 @@ do
             shift
             runtime_id="$1"
             non_dynamic_parameters+=" $name "\""$1"\"""
+            say_warning "Use of --runtime-id is obsolete and should be limited to the versions below 2.1. To override architecture, use --architecture option instead. To override OS, use --os option instead."
             ;;
         --jsonfile|-[Jj][Ss]on[Ff]ile)
             shift
@@ -1004,8 +1104,6 @@ do
             echo "      -Version"
             echo "          Possible values:"
             echo "          - latest - most latest build on specific channel"
-            echo "          - coherent - most latest coherent build on specific channel"
-            echo "              coherent applies only to SDK downloads"
             echo "          - 3-part version in a format A.B.C - represents specific version of build"
             echo "              examples: 2.0.0-preview2-006120; 1.1.0"
             echo "  -i,--install-dir <DIR>             Install under specified location (see Install Location below)"
@@ -1013,6 +1111,11 @@ do
             echo "  --architecture <ARCHITECTURE>      Architecture of dotnet binaries to be installed, Defaults to \`$architecture\`."
             echo "      --arch,-Architecture,-Arch"
             echo "          Possible values: x64, arm, and arm64"
+            echo "  --os <system>                    Specifies operating system to be used when selecting the installer."
+            echo "          Overrides the OS determination approach used by the script. Supported values: osx, linux, linux-musl, freebsd, rhel.6."  
+            echo "          In case any other value is provided, the platform will be determined by the script based on machine configuration."       
+            echo "          Not supported for legacy links. Use --runtime-id to specify platform for legacy links."
+            echo "          Refer to: https://aka.ms/dotnet-os-lifecycle for more information."                 
             echo "  --runtime <RUNTIME>                Installs a shared runtime only, without the SDK."
             echo "      -Runtime"
             echo "          Possible values:"
@@ -1029,14 +1132,15 @@ do
             echo "  --no-cdn,-NoCdn                    Disable downloading from the Azure CDN, and use the uncached feed directly."
             echo "  --jsonfile <JSONFILE>              Determines the SDK version from a user specified global.json file."
             echo "                                     Note: global.json must have a value for 'SDK:Version'"
-            echo "  --runtime-id                       Installs the .NET Tools for the given platform (use linux-x64 for portable linux)."
-            echo "      -RuntimeId"
             echo "  -?,--?,-h,--help,-Help             Shows this help message"
             echo ""
             echo "Obsolete parameters:"
             echo "  --shared-runtime                   The recommended alternative is '--runtime dotnet'."
             echo "                                     This parameter is obsolete and may be removed in a future version of this script."
             echo "                                     Installs just the shared runtime bits, not the entire SDK."
+            echo "  --runtime-id                       Installs the .NET Tools for the given platform (use linux-x64 for portable linux)."
+            echo "      -RuntimeId"                    The parameter is obsolete and may be removed in a future version of this script. Should be used only for versions below 2.1.
+            echo "                                     For primary links to override OS or/and architecture, use --os and --architecture option instead." 
             echo ""
             echo "Install Location:"
             echo "  Location is chosen in following order:"
@@ -1058,6 +1162,11 @@ if [ "$no_cdn" = true ]; then
     azure_feed="$uncached_feed"
 fi
 
+say "Note that the intended use of this script is for Continuous Integration (CI) scenarios, where:"
+say "- The SDK needs to be installed without user interaction and without admin rights."
+say "- The SDK installation doesn't need to persist across multiple CI runs."
+say "To set up a development environment or to run apps, use installers rather than this script. Visit https://dotnet.microsoft.com/download to get the installer.\n"
+
 check_min_reqs
 calculate_vars
 script_name=$(basename "$0")
@@ -1068,7 +1177,7 @@ if [ "$dry_run" = true ]; then
     if [ "$valid_legacy_download_link" = true ]; then
         say "Legacy named payload URL: $legacy_download_link"
     fi
-    repeatable_command="./$script_name --version "\""$specific_version"\"" --install-dir "\""$install_root"\"" --architecture "\""$normalized_architecture"\"""
+    repeatable_command="./$script_name --version "\""$specific_version"\"" --install-dir "\""$install_root"\"" --architecture "\""$normalized_architecture"\"" --os "\""$normalized_os"\""" 
     if [[ "$runtime" == "dotnet" ]]; then
         repeatable_command+=" --runtime "\""dotnet"\"""
     elif [[ "$runtime" == "aspnetcore" ]]; then
@@ -1079,7 +1188,6 @@ if [ "$dry_run" = true ]; then
     exit 0
 fi
 
-check_pre_reqs
 install_dotnet
 
 bin_path="$(get_absolute_path "$(combine_paths "$install_root" "$bin_folder_relative_path")")"
@@ -1090,4 +1198,6 @@ else
     say "Binaries of dotnet can be found in $bin_path"
 fi
 
+say "Note that the script does not resolve dependencies during installation."
+say "To check the list of dependencies, go to https://docs.microsoft.com/dotnet/core/install, select your operating system and check the \"Dependencies\" section."
 say "Installation finished successfully."

src/Misc/expressionFunc/hashFiles/package-lock.json

@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "@actions/core": {
-      "version": "1.2.0",
+      "version": "1.2.6",
-      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.0.tgz",
+      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.6.tgz",
-      "integrity": "sha512-ZKdyhlSlyz38S6YFfPnyNgCDZuAF2T0Qv5eHflNWytPS8Qjvz39bZFMry9Bb/dpSnqWcNeav5yM2CTYpJeY+Dw=="
+      "integrity": "sha512-ZQYitnqiyBc3D+k7LsgSBmMDVkOVidaagDG7j3fOym77jNunWRuYx7VSHa9GNfFZh+zh61xsCjRj4JxMZlDqTA=="
     },
     "@actions/glob": {
       "version": "0.1.0",
@@ -1683,9 +1683,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.15",
+      "version": "4.17.19",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.19.tgz",
-      "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
+      "integrity": "sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==",
       "dev": true
     },
     "lodash.unescape": {

src/Misc/layoutbin/actions.runner.plist.template

@@ -23,5 +23,7 @@
       <key>ACTIONS_RUNNER_SVC</key>
       <string>1</string>
     </dict>
+    <key>ProcessType</key>
+    <string>Interactive</string>
   </dict>
 </plist>

src/Misc/layoutbin/checkScripts/downloadCert.js

@@ -0,0 +1,115 @@
+const https = require('https')
+const fs = require('fs')
+const http = require('http')
+const hostname = process.env['HOSTNAME'] || ''
+const port = process.env['PORT'] || ''
+const path = process.env['PATH'] || ''
+const pat = process.env['PAT'] || ''
+const proxyHost = process.env['PROXYHOST'] || ''
+const proxyPort = process.env['PROXYPORT'] || ''
+const proxyUsername = process.env['PROXYUSERNAME'] || ''
+const proxyPassword = process.env['PROXYPASSWORD'] || ''
+
+process.env['NODE_TLS_REJECT_UNAUTHORIZED'] = '0'
+
+if (proxyHost === '') {
+    const options = {
+        hostname: hostname,
+        port: port,
+        path: path,
+        method: 'GET',
+        headers: {
+            'User-Agent': 'GitHubActionsRunnerCheck/1.0',
+            'Authorization': `token ${pat}`
+        },
+    }
+    const req = https.request(options, res => {
+        console.log(`statusCode: ${res.statusCode}`)
+        console.log(`headers: ${JSON.stringify(res.headers)}`)
+        let cert = socket.getPeerCertificate(true)
+        let certPEM = ''
+        let fingerprints = {}
+        while (cert != null && fingerprints[cert.fingerprint] != '1') {
+            fingerprints[cert.fingerprint] = '1'
+            certPEM = certPEM + '-----BEGIN CERTIFICATE-----\n'
+            let certEncoded = cert.raw.toString('base64')
+            for (let i = 0; i < certEncoded.length; i++) {
+                certPEM = certPEM + certEncoded[i]
+                if (i != certEncoded.length - 1 && (i + 1) % 64 == 0) {
+                    certPEM = certPEM + '\n'
+                }
+            }
+            certPEM = certPEM + '\n-----END CERTIFICATE-----\n'
+            cert = cert.issuerCertificate
+        }
+        console.log(certPEM)
+        fs.writeFileSync('./download_ca_cert.pem', certPEM)
+        res.on('data', d => {
+            process.stdout.write(d)
+        })
+    })
+    req.on('error', error => {
+        console.error(error)
+    })
+    req.end()
+}
+else {
+    const auth = 'Basic ' + Buffer.from(proxyUsername + ':' + proxyPassword).toString('base64')
+
+    const options = {
+        host: proxyHost,
+        port: proxyPort,
+        method: 'CONNECT',
+        path: `${hostname}:${port}`,
+    }
+
+    if (proxyUsername != '' || proxyPassword != '') {
+        options.headers = {
+            'Proxy-Authorization': auth,
+        }
+    }
+
+    http.request(options).on('connect', (res, socket) => {
+        if (res.statusCode != 200) {
+            throw new Error(`Proxy returns code: ${res.statusCode}`)
+        }
+
+        https.get({
+            host: hostname,
+            port: port,
+            socket: socket,
+            agent: false,
+            path: '/',
+            headers: {
+                'User-Agent': 'GitHubActionsRunnerCheck/1.0',
+                'Authorization': `token ${pat}`
+            }
+        }, (res) => {
+            let cert = res.socket.getPeerCertificate(true)
+            let certPEM = ''
+            let fingerprints = {}
+            while (cert != null && fingerprints[cert.fingerprint] != '1') {
+                fingerprints[cert.fingerprint] = '1'
+                certPEM = certPEM + '-----BEGIN CERTIFICATE-----\n'
+                let certEncoded = cert.raw.toString('base64')
+                for (let i = 0; i < certEncoded.length; i++) {
+                    certPEM = certPEM + certEncoded[i]
+                    if (i != certEncoded.length - 1 && (i + 1) % 64 == 0) {
+                        certPEM = certPEM + '\n'
+                    }
+                }
+                certPEM = certPEM + '\n-----END CERTIFICATE-----\n'
+                cert = cert.issuerCertificate
+            }
+            console.log(certPEM)
+            fs.writeFileSync('./download_ca_cert.pem', certPEM)
+            console.log(`statusCode: ${res.statusCode}`)
+            console.log(`headers: ${JSON.stringify(res.headers)}`)
+            res.on('data', d => {
+                process.stdout.write(d)
+            })
+        })
+    }).on('error', (err) => {
+        console.error('error', err)
+    }).end()
+}

src/Misc/layoutbin/checkScripts/makeWebRequest.js

@@ -0,0 +1,75 @@
+const https = require('https')
+const http = require('http')
+const hostname = process.env['HOSTNAME'] || ''
+const port = process.env['PORT'] || ''
+const path = process.env['PATH'] || ''
+const pat = process.env['PAT'] || ''
+const proxyHost = process.env['PROXYHOST'] || ''
+const proxyPort = process.env['PROXYPORT'] || ''
+const proxyUsername = process.env['PROXYUSERNAME'] || ''
+const proxyPassword = process.env['PROXYPASSWORD'] || ''
+
+if (proxyHost === '') {
+    const options = {
+        hostname: hostname,
+        port: port,
+        path: path,
+        method: 'GET',
+        headers: {
+            'User-Agent': 'GitHubActionsRunnerCheck/1.0',
+            'Authorization': `token ${pat}`,
+        }
+    }
+    const req = https.request(options, res => {
+        console.log(`statusCode: ${res.statusCode}`)
+        console.log(`headers: ${JSON.stringify(res.headers)}`)
+
+        res.on('data', d => {
+            process.stdout.write(d)
+        })
+    })
+    req.on('error', error => {
+        console.error(error)
+    })
+    req.end()
+}
+else {
+    const proxyAuth = 'Basic ' + Buffer.from(proxyUsername + ':' + proxyPassword).toString('base64')
+    const options = {
+        hostname: proxyHost,
+        port: proxyPort,
+        method: 'CONNECT',
+        path: `${hostname}:${port}`
+    }
+
+    if (proxyUsername != '' || proxyPassword != '') {
+        options.headers = {
+            'Proxy-Authorization': proxyAuth,
+        }
+    }
+    http.request(options).on('connect', (res, socket) => {
+        if (res.statusCode != 200) {
+            throw new Error(`Proxy returns code: ${res.statusCode}`)
+        }
+        https.get({
+            host: hostname,
+            port: port,
+            socket: socket,
+            agent: false,
+            path: path,
+            headers: {
+                'User-Agent': 'GitHubActionsRunnerCheck/1.0',
+                'Authorization': `token ${pat}`,
+            }
+        }, (res) => {
+            console.log(`statusCode: ${res.statusCode}`)
+            console.log(`headers: ${JSON.stringify(res.headers)}`)
+
+            res.on('data', d => {
+                process.stdout.write(d)
+            })
+        })
+    }).on('error', (err) => {
+        console.error('error', err)
+    }).end()
+}

src/Misc/layoutbin/darwin.svc.sh.template

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 SVC_NAME="{{SvcNameVar}}"
+SVC_NAME=${SVC_NAME// /_}
 SVC_DESCRIPTION="{{SvcDescription}}"
 
 user_id=`id -u`

src/Misc/layoutbin/installdependencies.sh

@@ -14,14 +14,14 @@ fi
 
 function print_errormessage() 
 {
-    echo "Can't install dotnet core dependencies."
+    echo "Can't install dotnet 5 dependencies."
     echo "You can manually install all required dependencies based on following documentation"
     echo "https://docs.microsoft.com/en-us/dotnet/core/linux-prerequisites?tabs=netcore2x"
 }
 
 function print_rhel6message() 
 {
-    echo "We did our best effort to install dotnet core dependencies"
+    echo "We did our best effort to install dotnet 5 dependencies"
     echo "However, there are some dependencies which require manual installation" 
     echo "You can install all remaining required dependencies based on the following documentation"
     echo "https://github.com/dotnet/core/blob/master/Documentation/build-and-install-rhel6-prerequisites.md"
@@ -29,7 +29,7 @@ function print_rhel6message()
 
 function print_rhel6errormessage() 
 {
-    echo "We couldn't install dotnet core dependencies"
+    echo "We couldn't install dotnet 5 dependencies"
     echo "You can manually install all required dependencies based on following documentation"
     echo "https://docs.microsoft.com/en-us/dotnet/core/linux-prerequisites?tabs=netcore2x"
     echo "In addition, there are some dependencies which require manual installation. Please follow this documentation" 
@@ -49,70 +49,68 @@ then
         cat /etc/debian_version
         echo "------------------------------"
         
-        # prefer apt over apt-get        
+        # prefer apt-get over apt
-        command -v apt
+        command -v apt-get
         if [ $? -eq 0 ]
         then
-            apt update && apt install -y liblttng-ust0 libkrb5-3 zlib1g
+            apt_get=apt-get
-            if [ $? -ne 0 ]
-            then
-                echo "'apt' failed with exit code '$?'"
-                print_errormessage
-                exit 1
-            fi
-
-            # libissl version prefer: libssl1.1 -> libssl1.0.2 -> libssl1.0.0
-            apt install -y libssl1.1$ || apt install -y libssl1.0.2$ || apt install -y libssl1.0.0$
-            if [ $? -ne 0 ]
-            then
-                echo "'apt' failed with exit code '$?'"
-                print_errormessage
-                exit 1
-            fi
-
-            # libicu version prefer: libicu63 -> libicu60 -> libicu57 -> libicu55 -> libicu52
-            apt install -y libicu63 || apt install -y libicu60 || apt install -y libicu57 || apt install -y libicu55 || apt install -y libicu52
-            if [ $? -ne 0 ]
-            then
-                echo "'apt' failed with exit code '$?'"
-                print_errormessage
-                exit 1
-            fi
         else
-            command -v apt-get
+            command -v apt
             if [ $? -eq 0 ]
             then
-                apt-get update && apt-get install -y liblttng-ust0 libkrb5-3 zlib1g
+                apt_get=apt
-                if [ $? -ne 0 ]
-                then
-                    echo "'apt-get' failed with exit code '$?'"
-                    print_errormessage
-                    exit 1
-                fi
-                
-                # libissl version prefer: libssl1.1 -> libssl1.0.2 -> libssl1.0.0
-                apt-get install -y libssl1.1$ || apt-get install -y libssl1.0.2$ || apt install -y libssl1.0.0$
-                if [ $? -ne 0 ]
-                then
-                    echo "'apt-get' failed with exit code '$?'"
-                    print_errormessage
-                    exit 1
-                fi
-
-                # libicu version prefer: libicu63 -> libicu60 -> libicu57 -> libicu55 -> libicu52
-                apt-get install -y libicu63 || apt-get install -y libicu60 || apt install -y libicu57 || apt install -y libicu55 || apt install -y libicu52
-                if [ $? -ne 0 ]
-                then
-                    echo "'apt-get' failed with exit code '$?'"
-                    print_errormessage
-                    exit 1
-                fi
             else
-                echo "Can not find 'apt' or 'apt-get'"
+                echo "Found neither 'apt-get' nor 'apt'"
                 print_errormessage
                 exit 1
             fi
         fi
+
+        $apt_get update && $apt_get install -y liblttng-ust0 libkrb5-3 zlib1g
+        if [ $? -ne 0 ]
+        then
+            echo "'$apt_get' failed with exit code '$?'"
+            print_errormessage
+            exit 1
+        fi
+
+        apt_get_with_fallbacks() {
+            $apt_get install -y $1
+            fail=$?
+            if [ $fail -eq 0 ]
+            then
+                if [ "${1#"${1%?}"}" = '$' ]; then
+                    dpkg -l "${1%?}" > /dev/null 2> /dev/null
+                    fail=$?
+                fi
+            fi
+            if [ $fail -ne 0 ]
+            then
+                shift
+                if [ -n "$1" ]
+                then
+                    apt_get_with_fallbacks "$@"
+                fi
+            fi
+        }
+
+        # libssl version prefer: libssl1.1 -> libssl1.0.2 -> libssl1.0.0
+        apt_get_with_fallbacks libssl1.1$ libssl1.0.2$ libssl1.0.0$
+        if [ $? -ne 0 ]
+        then
+            echo "'$apt_get' failed with exit code '$?'"
+            print_errormessage
+            exit 1
+        fi
+
+        # libicu version prefer: libicu66 -> libicu63 -> libicu60 -> libicu57 -> libicu55 -> libicu52
+        apt_get_with_fallbacks libicu66 libicu63 libicu60 libicu57 libicu55 libicu52
+        if [ $? -ne 0 ]
+        then
+            echo "'$apt_get' failed with exit code '$?'"
+            print_errormessage
+            exit 1
+        fi
     elif [ -e /etc/redhat-release ]
     then
         echo "The current OS is Fedora based"

src/Misc/layoutbin/systemd.svc.sh.template

@@ -1,6 +1,7 @@
 #!/bin/bash
 
 SVC_NAME="{{SvcNameVar}}"
+SVC_NAME=${SVC_NAME// /_}
 SVC_DESCRIPTION="{{SvcDescription}}"
 
 SVC_CMD=$1
@@ -62,12 +63,25 @@ function install()
 
     sed "s/{{User}}/${run_as_user}/g; s/{{Description}}/$(echo ${SVC_DESCRIPTION} | sed -e 's/[\/&]/\\&/g')/g; s/{{RunnerRoot}}/$(echo ${RUNNER_ROOT} | sed -e 's/[\/&]/\\&/g')/g;" "${TEMPLATE_PATH}" > "${TEMP_PATH}" || failed "failed to create replacement temp file"
     mv "${TEMP_PATH}" "${UNIT_PATH}" || failed "failed to copy unit file"
+
+    # Recent Fedora based Linux (CentOS/Redhat) has SELinux enabled by default
+    # We need to restore security context on the unit file we added otherwise SystemD have no access to it.
+    command -v getenforce > /dev/null
+    if [ $? -eq 0 ]
+    then
+        selinuxEnabled=$(getenforce)
+        if [[ $selinuxEnabled == "Enforcing" ]]
+        then
+            # SELinux is enabled, we will need to Restore SELinux Context for the service file
+            restorecon -r -v "${UNIT_PATH}" || failed "failed to restore SELinux context on ${UNIT_PATH}"
+        fi
+    fi
     
     # unit file should not be executable and world writable
-    chmod 664 ${UNIT_PATH} || failed "failed to set permissions on ${UNIT_PATH}"
+    chmod 664 "${UNIT_PATH}" || failed "failed to set permissions on ${UNIT_PATH}"
     systemctl daemon-reload || failed "failed to reload daemons"
     
-	# Since we started with sudo, runsvc.sh will be owned by root. Change this to current login user.    
+    # Since we started with sudo, runsvc.sh will be owned by root. Change this to current login user.    
     cp ./bin/runsvc.sh ./runsvc.sh || failed "failed to copy runsvc.sh"
     chown ${run_as_uid}:${run_as_gid} ./runsvc.sh || failed "failed to set owner for runsvc.sh"
     chmod 755 ./runsvc.sh || failed "failed to set permission for runsvc.sh"

src/Misc/layoutbin/update.sh.template

@@ -28,13 +28,13 @@ date "+[%F %T-%4N] Waiting for $runnerprocessname ($runnerpid) to complete" >> "
 while [ -e /proc/$runnerpid ]
 do
     date "+[%F %T-%4N] Process $runnerpid still running" >> "$logfile" 2>&1
-    ping -c 2 127.0.0.1 >nul
+    sleep 2
 done
 date "+[%F %T-%4N] Process $runnerpid finished running" >> "$logfile" 2>&1
 
 # start re-organize folders
 date "+[%F %T-%4N] Sleep 1 more second to make sure process exited" >> "$logfile" 2>&1
-ping -c 2 127.0.0.1 >nul
+sleep 1
 
 # the folder structure under runner root will be
 # ./bin -> bin.2.100.0 (junction folder)

src/Misc/layoutroot/config.sh

@@ -8,7 +8,7 @@ if [ $user_id -eq 0 -a -z "$RUNNER_ALLOW_RUNASROOT" ]; then
     exit 1
 fi
 
-# Check dotnet core 3.0 dependencies for Linux
+# Check dotnet 5 dependencies for Linux
 if [[ (`uname` == "Linux") ]]
 then
     command -v ldd > /dev/null
@@ -18,24 +18,26 @@ then
         exit 1
     fi
 
+    message="Execute sudo ./bin/installdependencies.sh to install any missing Dotnet 5 dependencies."
+
     ldd ./bin/libcoreclr.so | grep 'not found'
     if [ $? -eq 0 ]; then
-        echo "Dependencies is missing for Dotnet Core 3.0"
+        echo "Dependencies is missing for Dotnet 5"
-        echo "Execute ./bin/installdependencies.sh to install any missing Dotnet Core 3.0 dependencies."
+        echo $message
         exit 1
     fi
 
-    ldd ./bin/System.Security.Cryptography.Native.OpenSsl.so | grep 'not found'
+    ldd ./bin/libSystem.Security.Cryptography.Native.OpenSsl.so | grep 'not found'
     if [ $? -eq 0 ]; then
-        echo "Dependencies is missing for Dotnet Core 3.0"
+        echo "Dependencies is missing for Dotnet 5"
-        echo "Execute ./bin/installdependencies.sh to install any missing Dotnet Core 3.0 dependencies."
+        echo $message
         exit 1
     fi
 
-    ldd ./bin/System.IO.Compression.Native.so | grep 'not found'
+    ldd ./bin/libSystem.IO.Compression.Native.so | grep 'not found'
     if [ $? -eq 0 ]; then
-        echo "Dependencies is missing for Dotnet Core 3.0"
+        echo "Dependencies is missing for Dotnet 5"
-        echo "Execute ./bin/installdependencies.sh to install any missing Dotnet Core 3.0 dependencies."
+        echo $message
         exit 1
     fi
 
@@ -50,10 +52,10 @@ then
     fi
 
     libpath=${LD_LIBRARY_PATH:-}
-    $LDCONFIG_COMMAND -NXv ${libpath//:/} 2>&1 | grep libicu >/dev/null 2>&1
+    $LDCONFIG_COMMAND -NXv ${libpath//:/ } 2>&1 | grep libicu >/dev/null 2>&1
     if [ $? -ne 0 ]; then
-        echo "Libicu's dependencies is missing for Dotnet Core 3.0"
+        echo "Libicu's dependencies is missing for Dotnet 5"
-        echo "Execute ./bin/installdependencies.sh to install any missing Dotnet Core 3.0 dependencies."
+        echo $message
         exit 1
     fi
 fi
@@ -67,7 +69,7 @@ while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symli
   [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
 done
 DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
-cd $DIR
+cd "$DIR"
 
 source ./env.sh
 

src/Misc/layoutroot/env.sh

@@ -6,6 +6,7 @@ varCheckList=(
     'ANT_HOME' 
     'M2_HOME' 
     'ANDROID_HOME' 
+    'ANDROID_SDK_ROOT'
     'GRADLE_HOME' 
     'NVM_BIN' 
     'NVM_PATH'

src/Runner.Common/ConfigurationStore.cs

@@ -108,9 +108,9 @@ namespace GitHub.Runner.Common
         CredentialData GetMigratedCredentials();
         RunnerSettings GetSettings();
         void SaveCredential(CredentialData credential);
-        void SaveMigratedCredential(CredentialData credential);
         void SaveSettings(RunnerSettings settings);
         void DeleteCredential();
+        void DeleteMigratedCredential();
         void DeleteSettings();
     }
 
@@ -232,21 +232,6 @@ namespace GitHub.Runner.Common
             File.SetAttributes(_credFilePath, File.GetAttributes(_credFilePath) | FileAttributes.Hidden);
         }
 
-        public void SaveMigratedCredential(CredentialData credential)
-        {
-            Trace.Info("Saving {0} migrated credential @ {1}", credential.Scheme, _migratedCredFilePath);
-            if (File.Exists(_migratedCredFilePath))
-            {
-                // Delete existing credential file first, since the file is hidden and not able to overwrite.
-                Trace.Info("Delete exist runner migrated credential file.");
-                IOUtil.DeleteFile(_migratedCredFilePath);
-            }
-
-            IOUtil.SaveObject(credential, _migratedCredFilePath);
-            Trace.Info("Migrated Credentials Saved.");
-            File.SetAttributes(_migratedCredFilePath, File.GetAttributes(_migratedCredFilePath) | FileAttributes.Hidden);
-        }
-
         public void SaveSettings(RunnerSettings settings)
         {
             Trace.Info("Saving runner settings.");
@@ -268,6 +253,11 @@ namespace GitHub.Runner.Common
             IOUtil.Delete(_migratedCredFilePath, default(CancellationToken));
         }
 
+        public void DeleteMigratedCredential()
+        {
+            IOUtil.Delete(_migratedCredFilePath, default(CancellationToken));
+        }
+
         public void DeleteSettings()
         {
             IOUtil.Delete(_configFilePath, default(CancellationToken));

src/Runner.Common/Constants.cs

@@ -90,7 +90,7 @@ namespace GitHub.Runner.Common
                     public static readonly string Labels = "labels";
                     public static readonly string MonitorSocketAddress = "monitorsocketaddress";
                     public static readonly string Name = "name";
-                    public static readonly string Pool = "pool";
+                    public static readonly string RunnerGroup = "runnergroup";
                     public static readonly string StartupType = "startuptype";
                     public static readonly string Url = "url";
                     public static readonly string UserName = "username";
@@ -99,9 +99,11 @@ namespace GitHub.Runner.Common
 
                     // Secret args. Must be added to the "Secrets" getter as well.
                     public static readonly string Token = "token";
+                    public static readonly string PAT = "pat";
                     public static readonly string WindowsLogonPassword = "windowslogonpassword";
                     public static string[] Secrets => new[]
                     {
+                        PAT,
                         Token,
                         WindowsLogonPassword,
                     };
@@ -119,6 +121,7 @@ namespace GitHub.Runner.Common
                 //validFlags array as well present in the CommandSettings.cs
                 public static class Flags
                 {
+                    public static readonly string Check = "check";
                     public static readonly string Commit = "commit";
                     public static readonly string Help = "help";
                     public static readonly string Replace = "replace";
@@ -138,8 +141,16 @@ namespace GitHub.Runner.Common
                 public const int RunOnceRunnerUpdating = 4;
             }
 
+            public static class Features
+            {
+                public static readonly string DiskSpaceWarning = "runner.diskspace.warning";
+            }
+
             public static readonly string InternalTelemetryIssueDataKey = "_internal_telemetry";
             public static readonly string WorkerCrash = "WORKER_CRASH";
+            public static readonly string LowDiskSpace = "LOW_DISK_SPACE";
+            public static readonly string UnsupportedCommand = "UNSUPPORTED_COMMAND";
+            public static readonly string UnsupportedCommandMessageDisabled = "The `{0}` command is disabled. Please upgrade to using Environment Files or opt into unsecure command execution by setting the `ACTIONS_ALLOW_UNSECURE_COMMANDS` environment variable to `true`. For more information see: https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/";
         }
 
         public static class RunnerEvent
@@ -198,6 +209,7 @@ namespace GitHub.Runner.Common
                 //
                 // Keep alphabetical
                 //
+                public static readonly string AllowUnsupportedCommands = "ACTIONS_ALLOW_UNSECURE_COMMANDS";
                 public static readonly string RunnerDebug = "ACTIONS_RUNNER_DEBUG";
                 public static readonly string StepDebug = "ACTIONS_STEP_DEBUG";
             }

src/Runner.Common/ExtensionManager.cs

@@ -56,6 +56,16 @@ namespace GitHub.Runner.Common
                     Add<T>(extensions, "GitHub.Runner.Worker.EndGroupCommandExtension, Runner.Worker");
                     Add<T>(extensions, "GitHub.Runner.Worker.EchoCommandExtension, Runner.Worker");
                     break;
+                case "GitHub.Runner.Worker.IFileCommandExtension":
+                    Add<T>(extensions, "GitHub.Runner.Worker.AddPathFileCommand, Runner.Worker");
+                    Add<T>(extensions, "GitHub.Runner.Worker.SetEnvFileCommand, Runner.Worker");
+                    break;
+                case "GitHub.Runner.Listener.Check.ICheckExtension":
+                    Add<T>(extensions, "GitHub.Runner.Listener.Check.InternetCheck, Runner.Listener");
+                    Add<T>(extensions, "GitHub.Runner.Listener.Check.ActionsCheck, Runner.Listener");
+                    Add<T>(extensions, "GitHub.Runner.Listener.Check.GitCheck, Runner.Listener");
+                    Add<T>(extensions, "GitHub.Runner.Listener.Check.NodeJsCheck, Runner.Listener");
+                    break;
                 default:
                     // This should never happen.
                     throw new NotSupportedException($"Unexpected extension type: '{typeof(T).FullName}'");

src/Runner.Common/JobServer.cs

@@ -16,12 +16,14 @@ namespace GitHub.Runner.Common
         // logging and console
         Task<TaskLog> AppendLogContentAsync(Guid scopeIdentifier, string hubName, Guid planId, int logId, Stream uploadStream, CancellationToken cancellationToken);
         Task AppendTimelineRecordFeedAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, Guid stepId, IList<string> lines, CancellationToken cancellationToken);
+        Task AppendTimelineRecordFeedAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, Guid stepId, IList<string> lines, long startLine, CancellationToken cancellationToken);
         Task<TaskAttachment> CreateAttachmentAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, String type, String name, Stream uploadStream, CancellationToken cancellationToken);
         Task<TaskLog> CreateLogAsync(Guid scopeIdentifier, string hubName, Guid planId, TaskLog log, CancellationToken cancellationToken);
         Task<Timeline> CreateTimelineAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, CancellationToken cancellationToken);
         Task<List<TimelineRecord>> UpdateTimelineRecordsAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, IEnumerable<TimelineRecord> records, CancellationToken cancellationToken);
         Task RaisePlanEventAsync<T>(Guid scopeIdentifier, string hubName, Guid planId, T eventData, CancellationToken cancellationToken) where T : JobEvent;
         Task<Timeline> GetTimelineAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, CancellationToken cancellationToken);
+        Task<ActionDownloadInfoCollection> ResolveActionDownloadInfoAsync(Guid scopeIdentifier, string hubName, Guid planId, ActionReferenceList actions, CancellationToken cancellationToken);
     }
 
     public sealed class JobServer : RunnerService, IJobServer
@@ -78,6 +80,12 @@ namespace GitHub.Runner.Common
             return _taskClient.AppendTimelineRecordFeedAsync(scopeIdentifier, hubName, planId, timelineId, timelineRecordId, stepId, lines, cancellationToken: cancellationToken);
         }
 
+        public Task AppendTimelineRecordFeedAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, Guid stepId, IList<string> lines, long startLine, CancellationToken cancellationToken)
+        {
+            CheckConnection();
+            return _taskClient.AppendTimelineRecordFeedAsync(scopeIdentifier, hubName, planId, timelineId, timelineRecordId, stepId, lines, startLine, cancellationToken: cancellationToken);
+        }
+
         public Task<TaskAttachment> CreateAttachmentAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, string type, string name, Stream uploadStream, CancellationToken cancellationToken)
         {
             CheckConnection();
@@ -113,5 +121,14 @@ namespace GitHub.Runner.Common
             CheckConnection();
             return _taskClient.GetTimelineAsync(scopeIdentifier, hubName, planId, timelineId, includeRecords: true, cancellationToken: cancellationToken);
         }
+
+        //-----------------------------------------------------------------
+        // Action download info
+        //-----------------------------------------------------------------
+        public Task<ActionDownloadInfoCollection> ResolveActionDownloadInfoAsync(Guid scopeIdentifier, string hubName, Guid planId, ActionReferenceList actions, CancellationToken cancellationToken)
+        {
+            CheckConnection();
+            return _taskClient.ResolveActionDownloadInfoAsync(scopeIdentifier, hubName, planId, actions, cancellationToken: cancellationToken);
+        }
     }
 }

src/Runner.Common/JobServerQueue.cs

@@ -18,7 +18,7 @@ namespace GitHub.Runner.Common
         event EventHandler<ThrottlingEventArgs> JobServerQueueThrottling;
         Task ShutdownAsync();
         void Start(Pipelines.AgentJobRequestMessage jobRequest);
-        void QueueWebConsoleLine(Guid stepRecordId, string line);
+        void QueueWebConsoleLine(Guid stepRecordId, string line, long? lineNumber = null);
         void QueueFileUpload(Guid timelineId, Guid timelineRecordId, string type, string name, string path, bool deleteSource);
         void QueueTimelineRecordUpdate(Guid timelineId, TimelineRecord timelineRecord);
     }
@@ -155,10 +155,10 @@ namespace GitHub.Runner.Common
             Trace.Info("All queue process tasks have been stopped, and all queues are drained.");
         }
 
-        public void QueueWebConsoleLine(Guid stepRecordId, string line)
+        public void QueueWebConsoleLine(Guid stepRecordId, string line, long? lineNumber)
         {
             Trace.Verbose("Enqueue web console line queue: {0}", line);
-            _webConsoleLineQueue.Enqueue(new ConsoleLineInfo(stepRecordId, line));
+            _webConsoleLineQueue.Enqueue(new ConsoleLineInfo(stepRecordId, line, lineNumber));
         }
 
         public void QueueFileUpload(Guid timelineId, Guid timelineRecordId, string type, string name, string path, bool deleteSource)
@@ -214,7 +214,7 @@ namespace GitHub.Runner.Common
                 }
 
                 // Group consolelines by timeline record of each step
-                Dictionary<Guid, List<string>> stepsConsoleLines = new Dictionary<Guid, List<string>>();
+                Dictionary<Guid, List<TimelineRecordLogLine>> stepsConsoleLines = new Dictionary<Guid, List<TimelineRecordLogLine>>();
                 List<Guid> stepRecordIds = new List<Guid>(); // We need to keep lines in order
                 int linesCounter = 0;
                 ConsoleLineInfo lineInfo;
@@ -222,7 +222,7 @@ namespace GitHub.Runner.Common
                 {
                     if (!stepsConsoleLines.ContainsKey(lineInfo.StepRecordId))
                     {
-                        stepsConsoleLines[lineInfo.StepRecordId] = new List<string>();
+                        stepsConsoleLines[lineInfo.StepRecordId] = new List<TimelineRecordLogLine>();
                         stepRecordIds.Add(lineInfo.StepRecordId);
                     }
 
@@ -232,7 +232,7 @@ namespace GitHub.Runner.Common
                         lineInfo.Line = $"{lineInfo.Line.Substring(0, 1024)}...";
                     }
 
-                    stepsConsoleLines[lineInfo.StepRecordId].Add(lineInfo.Line);
+                    stepsConsoleLines[lineInfo.StepRecordId].Add(new TimelineRecordLogLine(lineInfo.Line, lineInfo.LineNumber));
                     linesCounter++;
 
                     // process at most about 500 lines of web console line during regular timer dequeue task.
@@ -247,13 +247,13 @@ namespace GitHub.Runner.Common
                 {
                     // Split consolelines into batch, each batch will container at most 100 lines.
                     int batchCounter = 0;
-                    List<List<string>> batchedLines = new List<List<string>>();
+                    List<List<TimelineRecordLogLine>> batchedLines = new List<List<TimelineRecordLogLine>>();
                     foreach (var line in stepsConsoleLines[stepRecordId])
                     {
                         var currentBatch = batchedLines.ElementAtOrDefault(batchCounter);
                         if (currentBatch == null)
                         {
-                            batchedLines.Add(new List<string>());
+                            batchedLines.Add(new List<TimelineRecordLogLine>());
                             currentBatch = batchedLines.ElementAt(batchCounter);
                         }
 
@@ -275,7 +275,6 @@ namespace GitHub.Runner.Common
                         {
                             Trace.Info($"Skip {batchedLines.Count - 2} batches web console lines for last run");
                             batchedLines = batchedLines.TakeLast(2).ToList();
-                            batchedLines[0].Insert(0, "...");
                         }
 
                         int errorCount = 0;
@@ -284,7 +283,15 @@ namespace GitHub.Runner.Common
                             try
                             {
                                 // we will not requeue failed batch, since the web console lines are time sensitive.
-                                await _jobServer.AppendTimelineRecordFeedAsync(_scopeIdentifier, _hubName, _planId, _jobTimelineId, _jobTimelineRecordId, stepRecordId, batch, default(CancellationToken));
+                                if (batch[0].LineNumber.HasValue)
+                                {
+                                    await _jobServer.AppendTimelineRecordFeedAsync(_scopeIdentifier, _hubName, _planId, _jobTimelineId, _jobTimelineRecordId, stepRecordId, batch.Select(logLine => logLine.Line).ToList(), batch[0].LineNumber.Value, default(CancellationToken));
+                                }
+                                else 
+                                {
+                                    await _jobServer.AppendTimelineRecordFeedAsync(_scopeIdentifier, _hubName, _planId, _jobTimelineId, _jobTimelineRecordId, stepRecordId, batch.Select(logLine => logLine.Line).ToList(), default(CancellationToken));
+                                }
+                                
                                 if (_firstConsoleOutputs)
                                 {
                                     HostContext.WritePerfCounter($"WorkerJobServerQueueAppendFirstConsoleOutput_{_planId.ToString()}");
@@ -653,13 +660,15 @@ namespace GitHub.Runner.Common
 
     internal class ConsoleLineInfo
     {
-        public ConsoleLineInfo(Guid recordId, string line)
+        public ConsoleLineInfo(Guid recordId, string line, long? lineNumber)
         {
             this.StepRecordId = recordId;
             this.Line = line;
+            this.LineNumber = lineNumber;
         }
 
         public Guid StepRecordId { get; set; }
         public string Line { get; set; }
+        public long? LineNumber { get; set; }
     }
 }

src/Runner.Common/RunnerServer.cs

@@ -50,10 +50,6 @@ namespace GitHub.Runner.Common
 
         // agent update
         Task<TaskAgent> UpdateAgentUpdateStateAsync(int agentPoolId, int agentId, string currentState);
-
-        // runner authorization url
-        Task<string> GetRunnerAuthUrlAsync(int runnerPoolId, int runnerId);
-        Task ReportRunnerAuthUrlErrorAsync(int runnerPoolId, int runnerId, string error);
     }
 
     public sealed class RunnerServer : RunnerService, IRunnerServer

src/Runner.Common/Terminal.cs

@@ -96,13 +96,14 @@ namespace GitHub.Runner.Common
             Trace.Info($"WRITE: {message}");
             if (!Silent)
             {
-                if(colorCode != null)
+                if (colorCode != null)
                 {
                     Console.ForegroundColor = colorCode.Value;
                     Console.Write(message);
                     Console.ResetColor();
                 }
-                else {
+                else
+                {
                     Console.Write(message);
                 }
             }
@@ -120,13 +121,14 @@ namespace GitHub.Runner.Common
             Trace.Info($"WRITE LINE: {line}");
             if (!Silent)
             {
-                if(colorCode != null)
+                if (colorCode != null)
                 {
                     Console.ForegroundColor = colorCode.Value;
                     Console.WriteLine(line);
                     Console.ResetColor();
                 }
-                else {
+                else
+                {
                     Console.WriteLine(line);
                 }
             }

src/Runner.Common/Util/EncodingUtil.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Runner.Sdk;
+using GitHub.Runner.Common;
+
+namespace GitHub.Runner.Common.Util
+{
+    public static class EncodingUtil
+    {
+        public static async Task SetEncoding(IHostContext hostContext, Tracing trace, CancellationToken cancellationToken)
+        {
+#if OS_WINDOWS
+            try
+            {
+                if (Console.InputEncoding.CodePage != 65001)
+                {
+                    using (var p = hostContext.CreateService<IProcessInvoker>())
+                    {
+                        // Use UTF8 code page
+                        int exitCode = await p.ExecuteAsync(workingDirectory: hostContext.GetDirectory(WellKnownDirectory.Work),
+                                                fileName: WhichUtil.Which("chcp", true, trace),
+                                                arguments: "65001",
+                                                environment: null,
+                                                requireExitCodeZero: false,
+                                                outputEncoding: null,
+                                                killProcessOnCancel: false,
+                                                redirectStandardIn: null,
+                                                inheritConsoleHandler: true,
+                                                cancellationToken: cancellationToken);
+                        if (exitCode == 0)
+                        {
+                            trace.Info("Successfully returned to code page 65001 (UTF8)");
+                        }
+                        else
+                        {
+                            trace.Warning($"'chcp 65001' failed with exit code {exitCode}");
+                        }
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                trace.Warning($"'chcp 65001' failed with exception {ex.Message}");
+            }
+#endif
+            // Dummy variable to prevent compiler error CS1998: "This async method lacks 'await' operators and will run synchronously..."
+            await Task.CompletedTask;
+        }
+    }
+}

src/Runner.Listener/Checks/ActionsCheck.cs

@@ -0,0 +1,90 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public sealed class ActionsCheck : RunnerService, ICheckExtension
+    {
+        private string _logFile = null;
+
+        public int Order => 2;
+
+        public string CheckName => "GitHub Actions Connection";
+
+        public string CheckDescription => "Make sure the actions runner have access to the GitHub Actions Service.";
+
+        public string CheckLog => _logFile;
+
+        public string HelpLink => "https://github.com/actions/runner/blob/main/docs/checks/actions.md";
+
+        public Type ExtensionType => typeof(ICheckExtension);
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _logFile = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Diag), StringUtil.Format("{0}_{1:yyyyMMdd-HHmmss}-utc.log", nameof(ActionsCheck), DateTime.UtcNow));
+        }
+
+        // runner access to actions service
+        public async Task<bool> RunCheck(string url, string pat)
+        {
+            await File.AppendAllLinesAsync(_logFile, HostContext.WarnLog());
+            await File.AppendAllLinesAsync(_logFile, HostContext.CheckProxy());
+
+            var checkTasks = new List<Task<CheckResult>>();
+            string githubApiUrl = null;
+            string actionsTokenServiceUrl = null;
+            string actionsPipelinesServiceUrl = null;
+            var urlBuilder = new UriBuilder(url);
+            if (UrlUtil.IsHostedServer(urlBuilder))
+            {
+                urlBuilder.Host = $"api.{urlBuilder.Host}";
+                urlBuilder.Path = "";
+                githubApiUrl = urlBuilder.Uri.AbsoluteUri;
+                actionsTokenServiceUrl = "https://vstoken.actions.githubusercontent.com/_apis/health";
+                actionsPipelinesServiceUrl = "https://pipelines.actions.githubusercontent.com/_apis/health";
+            }
+            else
+            {
+                urlBuilder.Path = "api/v3";
+                githubApiUrl = urlBuilder.Uri.AbsoluteUri;
+                urlBuilder.Path = "_services/vstoken/_apis/health";
+                actionsTokenServiceUrl = urlBuilder.Uri.AbsoluteUri;
+                urlBuilder.Path = "_services/pipelines/_apis/health";
+                actionsPipelinesServiceUrl = urlBuilder.Uri.AbsoluteUri;
+            }
+
+            // check github api
+            checkTasks.Add(CheckUtil.CheckDns(githubApiUrl));
+            checkTasks.Add(CheckUtil.CheckPing(githubApiUrl));
+            checkTasks.Add(HostContext.CheckHttpsRequests(githubApiUrl, pat, expectedHeader: "X-GitHub-Request-Id"));
+
+            // check actions token service
+            checkTasks.Add(CheckUtil.CheckDns(actionsTokenServiceUrl));
+            checkTasks.Add(CheckUtil.CheckPing(actionsTokenServiceUrl));
+            checkTasks.Add(HostContext.CheckHttpsRequests(actionsTokenServiceUrl, pat, expectedHeader: "x-vss-e2eid"));
+
+            // check actions pipelines service
+            checkTasks.Add(CheckUtil.CheckDns(actionsPipelinesServiceUrl));
+            checkTasks.Add(CheckUtil.CheckPing(actionsPipelinesServiceUrl));
+            checkTasks.Add(HostContext.CheckHttpsRequests(actionsPipelinesServiceUrl, pat, expectedHeader: "x-vss-e2eid"));
+
+            var result = true;
+            while (checkTasks.Count > 0)
+            {
+                var finishedCheckTask = await Task.WhenAny<CheckResult>(checkTasks);
+                var finishedCheck = await finishedCheckTask;
+                result = result && finishedCheck.Pass;
+                await File.AppendAllLinesAsync(_logFile, finishedCheck.Logs);
+                checkTasks.Remove(finishedCheckTask);
+            }
+
+            await Task.WhenAll(checkTasks);
+            return result;
+        }
+    }
+}

src/Runner.Listener/Checks/CheckUtil.cs

@@ -0,0 +1,351 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.Tracing;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Net.NetworkInformation;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+using GitHub.Services.Common;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public static class CheckUtil
+    {
+        public static List<string> WarnLog(this IHostContext hostContext)
+        {
+            var logs = new List<string>();
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****     !!! WARNING !!! ");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****     DO NOT share the log in public place! The log may contains secrets in plain text. ");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****     !!! WARNING !!! ");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+            logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            return logs;
+        }
+
+        public static List<string> CheckProxy(this IHostContext hostContext)
+        {
+            var logs = new List<string>();
+            if (!string.IsNullOrEmpty(hostContext.WebProxy.HttpProxyAddress) ||
+                !string.IsNullOrEmpty(hostContext.WebProxy.HttpsProxyAddress))
+            {
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Runner is behind web proxy {hostContext.WebProxy.HttpsProxyAddress ?? hostContext.WebProxy.HttpProxyAddress} ");
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return logs;
+        }
+
+        public static async Task<CheckResult> CheckDns(string targetUrl)
+        {
+            var result = new CheckResult();
+            var url = new Uri(targetUrl);
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Try DNS lookup for {url.Host} ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                IPHostEntry host = await Dns.GetHostEntryAsync(url.Host);
+                foreach (var address in host.AddressList)
+                {
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Resolved DNS for {url.Host} to '{address}'");
+                }
+
+                result.Pass = true;
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Resolved DNS for {url.Host} failed with error: {ex}");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+
+        public static async Task<CheckResult> CheckPing(string targetUrl)
+        {
+            var result = new CheckResult();
+            var url = new Uri(targetUrl);
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Try ping {url.Host} ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                using (var ping = new Ping())
+                {
+                    var reply = await ping.SendPingAsync(url.Host);
+                    if (reply.Status == IPStatus.Success)
+                    {
+                        result.Pass = true;
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Ping {url.Host} ({reply.Address}) succeed within to '{reply.RoundtripTime} ms'");
+                    }
+                    else
+                    {
+                        result.Pass = false;
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Ping {url.Host} ({reply.Address}) failed with '{reply.Status}'");
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Ping api.github.com failed with error: {ex}");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+
+        public static async Task<CheckResult> CheckHttpsRequests(this IHostContext hostContext, string url, string pat, string expectedHeader)
+        {
+            var result = new CheckResult();
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Send HTTPS Request to {url} ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                using (var _ = new HttpEventSourceListener(result.Logs))
+                using (var httpClientHandler = hostContext.CreateHttpClientHandler())
+                using (var httpClient = new HttpClient(httpClientHandler))
+                {
+                    httpClient.DefaultRequestHeaders.UserAgent.AddRange(hostContext.UserAgents);
+                    if (!string.IsNullOrEmpty(pat))
+                    {
+                        httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("token", pat);
+                    }
+
+                    var response = await httpClient.GetAsync(url);
+
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http status code: {response.StatusCode}");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http response headers: {response.Headers}");
+
+                    var responseContent = await response.Content.ReadAsStringAsync();
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http response body: {responseContent}");
+                    if (response.IsSuccessStatusCode)
+                    {
+                        if (response.Headers.Contains(expectedHeader))
+                        {
+                            result.Pass = true;
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http request 'GET' to {url} succeed");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                        }
+                        else
+                        {
+                            result.Pass = false;
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http request 'GET' to {url} succeed but doesn't have expected HTTP Header.");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                        }
+                    }
+                    else
+                    {
+                        result.Pass = false;
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Http request 'GET' to {url} failed with {response.StatusCode}");
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                        result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ");
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Https request 'GET' to {url} failed with error: {ex}");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+
+        public static async Task<CheckResult> DownloadExtraCA(this IHostContext hostContext, string url, string pat)
+        {
+            var result = new CheckResult();
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Download SSL Certificate from {url} ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+
+                var uri = new Uri(url);
+                var env = new Dictionary<string, string>()
+                {
+                    { "HOSTNAME", uri.Host },
+                    { "PORT", uri.IsDefaultPort ? (uri.Scheme.ToLowerInvariant() == "https" ? "443" : "80") : uri.Port.ToString() },
+                    { "PATH", uri.AbsolutePath },
+                    { "PAT", pat }
+                };
+
+                var proxy = hostContext.WebProxy.GetProxy(uri);
+                if (proxy != null)
+                {
+                    env["PROXYHOST"] = proxy.Host;
+                    env["PROXYPORT"] = proxy.IsDefaultPort ? (proxy.Scheme.ToLowerInvariant() == "https" ? "443" : "80") : proxy.Port.ToString();
+                    if (hostContext.WebProxy.HttpProxyUsername != null ||
+                        hostContext.WebProxy.HttpsProxyUsername != null)
+                    {
+                        env["PROXYUSERNAME"] = hostContext.WebProxy.HttpProxyUsername ?? hostContext.WebProxy.HttpsProxyUsername;
+                        env["PROXYPASSWORD"] = hostContext.WebProxy.HttpProxyPassword ?? hostContext.WebProxy.HttpsProxyPassword;
+                    }
+                    else
+                    {
+                        env["PROXYUSERNAME"] = "";
+                        env["PROXYPASSWORD"] = "";
+                    }
+                }
+                else
+                {
+                    env["PROXYHOST"] = "";
+                    env["PROXYPORT"] = "";
+                    env["PROXYUSERNAME"] = "";
+                    env["PROXYPASSWORD"] = "";
+                }
+
+                using (var processInvoker = hostContext.CreateService<IProcessInvoker>())
+                {
+                    processInvoker.OutputDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} [STDOUT] {args.Data}");
+                        }
+                    });
+
+                    processInvoker.ErrorDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} [STDERR] {args.Data}");
+                        }
+                    });
+
+                    var downloadCertScript = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Bin), "checkScripts", "downloadCert");
+                    var node12 = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Externals), "node12", "bin", $"node{IOUtil.ExeExtension}");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Run '{node12} \"{downloadCertScript}\"' ");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {StringUtil.ConvertToJson(env)}");
+                    await processInvoker.ExecuteAsync(
+                        hostContext.GetDirectory(WellKnownDirectory.Root),
+                        node12,
+                        $"\"{downloadCertScript}\"",
+                        env,
+                        true,
+                        CancellationToken.None);
+                }
+
+                result.Pass = true;
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Download SSL Certificate from '{url}' failed with error: {ex}");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+    }
+
+    // EventSource listener for dotnet debug trace for HTTP and SSL
+    public sealed class HttpEventSourceListener : EventListener
+    {
+        private readonly List<string> _logs;
+        private readonly object _lock = new object();
+        private readonly Dictionary<string, HashSet<string>> _ignoredEvent = new Dictionary<string, HashSet<string>>
+        {
+            {
+                "Private.InternalDiagnostics.System.Net.Http",
+                new HashSet<string>
+                {
+                    "Info",
+                    "Associate"
+                }
+            },
+            {
+                "Private.InternalDiagnostics.System.Net.Security",
+                new HashSet<string>
+                {
+                    "Info",
+                    "SslStreamCtor",
+                    "SecureChannelCtor",
+                    "NoDelegateNoClientCert",
+                    "CertsAfterFiltering",
+                    "UsingCachedCredential",
+                    "SspiSelectedCipherSuite"
+                }
+            }
+        };
+
+        public HttpEventSourceListener(List<string> logs)
+        {
+            _logs = logs;
+            if (Environment.GetEnvironmentVariable("ACTIONS_RUNNER_TRACE_ALL_HTTP_EVENT") == "1")
+            {
+                _ignoredEvent.Clear();
+            }
+        }
+
+        protected override void OnEventSourceCreated(EventSource eventSource)
+        {
+            base.OnEventSourceCreated(eventSource);
+
+            if (eventSource.Name == "Private.InternalDiagnostics.System.Net.Http" ||
+                eventSource.Name == "Private.InternalDiagnostics.System.Net.Security")
+            {
+                EnableEvents(eventSource, EventLevel.Verbose, EventKeywords.All);
+            }
+        }
+
+        protected override void OnEventWritten(EventWrittenEventArgs eventData)
+        {
+            base.OnEventWritten(eventData);
+            lock (_lock)
+            {
+                if (_ignoredEvent.TryGetValue(eventData.EventSource.Name, out var ignored) &&
+                    ignored.Contains(eventData.EventName))
+                {
+                    return;
+                }
+
+                _logs.Add($"{DateTime.UtcNow.ToString("O")} [START {eventData.EventSource.Name} - {eventData.EventName}]");
+                _logs.AddRange(eventData.Payload.Select(x => string.Join(Environment.NewLine, x.ToString().Split(Environment.NewLine).Select(y => $"{DateTime.UtcNow.ToString("O")} {y}"))));
+                _logs.Add($"{DateTime.UtcNow.ToString("O")} [END {eventData.EventSource.Name} - {eventData.EventName}]");
+            }
+        }
+    }
+}

src/Runner.Listener/Checks/GitCheck.cs

@@ -0,0 +1,171 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public sealed class GitCheck : RunnerService, ICheckExtension
+    {
+        private string _logFile = null;
+        private string _gitPath = null;
+
+        public int Order => 3;
+
+        public string CheckName => "Git Certificate/Proxy Validation";
+
+        public string CheckDescription => "Make sure the git cli can access to GitHub.com or the GitHub Enterprise Server.";
+
+        public string CheckLog => _logFile;
+
+        public string HelpLink => "https://github.com/actions/runner/blob/main/docs/checks/git.md";
+
+        public Type ExtensionType => typeof(ICheckExtension);
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _logFile = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Diag), StringUtil.Format("{0}_{1:yyyyMMdd-HHmmss}-utc.log", nameof(GitCheck), DateTime.UtcNow));
+            _gitPath = WhichUtil.Which("git");
+        }
+
+        // git access to ghes/gh 
+        public async Task<bool> RunCheck(string url, string pat)
+        {
+            await File.AppendAllLinesAsync(_logFile, HostContext.WarnLog());
+            await File.AppendAllLinesAsync(_logFile, HostContext.CheckProxy());
+
+            if (string.IsNullOrEmpty(_gitPath))
+            {
+                await File.AppendAllLinesAsync(_logFile, new[] { $"{DateTime.UtcNow.ToString("O")} Can't verify git with GitHub.com or GitHub Enterprise Server since git is not installed." });
+                return false;
+            }
+
+            var checkGit = await CheckGit(url, pat);
+            var result = checkGit.Pass;
+            await File.AppendAllLinesAsync(_logFile, checkGit.Logs);
+
+            // try fix SSL error by providing extra CA certificate.
+            if (checkGit.SslError)
+            {
+                await File.AppendAllLinesAsync(_logFile, new[] { $"{DateTime.UtcNow.ToString("O")} Try fix SSL error by providing extra CA certificate." });
+                var downloadCert = await HostContext.DownloadExtraCA(url, pat);
+                await File.AppendAllLinesAsync(_logFile, downloadCert.Logs);
+
+                if (downloadCert.Pass)
+                {
+                    var recheckGit = await CheckGit(url, pat, extraCA: true);
+                    await File.AppendAllLinesAsync(_logFile, recheckGit.Logs);
+                    if (recheckGit.Pass)
+                    {
+                        await File.AppendAllLinesAsync(_logFile, new[] { $"{DateTime.UtcNow.ToString("O")} Fixed SSL error by providing extra CA certs." });
+                    }
+                }
+            }
+
+            return result;
+        }
+
+        private async Task<CheckResult> CheckGit(string url, string pat, bool extraCA = false)
+        {
+            var result = new CheckResult();
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Validate server cert and proxy configuration with Git ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                var repoUrlBuilder = new UriBuilder(url);
+                repoUrlBuilder.Path = "actions/checkout";
+                repoUrlBuilder.UserName = "gh";
+                repoUrlBuilder.Password = pat;
+
+                var gitProxy = "";
+                var proxy = HostContext.WebProxy.GetProxy(repoUrlBuilder.Uri);
+                if (proxy != null)
+                {
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Runner is behind http proxy '{proxy.AbsoluteUri}'");
+                    if (HostContext.WebProxy.HttpProxyUsername != null ||
+                        HostContext.WebProxy.HttpsProxyUsername != null)
+                    {
+                        var proxyUrlWithCred = UrlUtil.GetCredentialEmbeddedUrl(
+                            proxy,
+                            HostContext.WebProxy.HttpProxyUsername ?? HostContext.WebProxy.HttpsProxyUsername,
+                            HostContext.WebProxy.HttpProxyPassword ?? HostContext.WebProxy.HttpsProxyPassword);
+                        gitProxy = $"-c http.proxy={proxyUrlWithCred}";
+                    }
+                    else
+                    {
+                        gitProxy = $"-c http.proxy={proxy.AbsoluteUri}";
+                    }
+                }
+
+                using (var processInvoker = HostContext.CreateService<IProcessInvoker>())
+                {
+                    processInvoker.OutputDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {args.Data}");
+                        }
+                    });
+
+                    processInvoker.ErrorDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {args.Data}");
+                        }
+                    });
+
+                    var gitArgs = $"{gitProxy} ls-remote --exit-code {repoUrlBuilder.Uri.AbsoluteUri} HEAD";
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Run 'git {gitArgs}' ");
+
+                    var env = new Dictionary<string, string>
+                    {
+                        { "GIT_TRACE", "1" },
+                        { "GIT_CURL_VERBOSE", "1" }
+                    };
+
+                    if (extraCA)
+                    {
+                        env["GIT_SSL_CAINFO"] = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), "download_ca_cert.pem");
+                    }
+
+                    await processInvoker.ExecuteAsync(
+                        HostContext.GetDirectory(WellKnownDirectory.Root),
+                        _gitPath,
+                        gitArgs,
+                        env,
+                        true,
+                        CancellationToken.None);
+                }
+
+                result.Pass = true;
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     git ls-remote failed with error: {ex}");
+                if (result.Logs.Any(x => x.Contains("SSL Certificate problem", StringComparison.OrdinalIgnoreCase)))
+                {
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     git ls-remote failed due to SSL cert issue.");
+                    result.SslError = true;
+                }
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+
+            }
+
+            return result;
+        }
+    }
+}

src/Runner.Listener/Checks/ICheckExtension.cs

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public interface ICheckExtension : IExtension
+    {
+        int Order { get; }
+        string CheckName { get; }
+        string CheckDescription { get; }
+        string CheckLog { get; }
+        string HelpLink { get; }
+        Task<bool> RunCheck(string url, string pat);
+    }
+
+    public class CheckResult
+    {
+        public CheckResult()
+        {
+            Logs = new List<string>();
+        }
+
+        public bool Pass { get; set; }
+
+        public bool SslError { get; set; }
+
+        public List<string> Logs { get; set; }
+    }
+}

src/Runner.Listener/Checks/InternetCheck.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public sealed class InternetCheck : RunnerService, ICheckExtension
+    {
+        private string _logFile = null;
+
+        public int Order => 1;
+
+        public string CheckName => "Internet Connection";
+
+        public string CheckDescription => "Make sure the actions runner have access to public internet.";
+
+        public string CheckLog => _logFile;
+
+        public string HelpLink => "https://github.com/actions/runner/blob/main/docs/checks/internet.md";
+
+        public Type ExtensionType => typeof(ICheckExtension);
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _logFile = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Diag), StringUtil.Format("{0}_{1:yyyyMMdd-HHmmss}-utc.log", nameof(InternetCheck), DateTime.UtcNow));
+        }
+
+        // check runner access to api.github.com
+        public async Task<bool> RunCheck(string url, string pat)
+        {
+            await File.AppendAllLinesAsync(_logFile, HostContext.WarnLog());
+            await File.AppendAllLinesAsync(_logFile, HostContext.CheckProxy());
+
+            var checkTasks = new List<Task<CheckResult>>();
+            checkTasks.Add(CheckUtil.CheckDns("https://api.github.com"));
+            checkTasks.Add(CheckUtil.CheckPing("https://api.github.com"));
+
+            // We don't need to pass a PAT since it might be a token for GHES.
+            checkTasks.Add(HostContext.CheckHttpsRequests("https://api.github.com", pat: null, expectedHeader: "X-GitHub-Request-Id"));
+
+            var result = true;
+            while (checkTasks.Count > 0)
+            {
+                var finishedCheckTask = await Task.WhenAny<CheckResult>(checkTasks);
+                var finishedCheck = await finishedCheckTask;
+                result = result && finishedCheck.Pass;
+                await File.AppendAllLinesAsync(_logFile, finishedCheck.Logs);
+                checkTasks.Remove(finishedCheckTask);
+            }
+
+            await Task.WhenAll(checkTasks);
+            return result;
+        }
+    }
+}

src/Runner.Listener/Checks/NodeJsCheck.cs

@@ -0,0 +1,181 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+
+namespace GitHub.Runner.Listener.Check
+{
+    public sealed class NodeJsCheck : RunnerService, ICheckExtension
+    {
+        private string _logFile = null;
+
+        public int Order => 4;
+
+        public string CheckName => "Node.js Certificate/Proxy Validation";
+
+        public string CheckDescription => "Make sure the node.js have access to GitHub.com or the GitHub Enterprise Server.";
+
+        public string CheckLog => _logFile;
+
+        public string HelpLink => "https://github.com/actions/runner/blob/main/docs/checks/nodejs.md";
+
+        public Type ExtensionType => typeof(ICheckExtension);
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _logFile = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Diag), StringUtil.Format("{0}_{1:yyyyMMdd-HHmmss}-utc.log", nameof(NodeJsCheck), DateTime.UtcNow));
+        }
+
+        // node access to ghes/gh
+        public async Task<bool> RunCheck(string url, string pat)
+        {
+            await File.AppendAllLinesAsync(_logFile, HostContext.WarnLog());
+            await File.AppendAllLinesAsync(_logFile, HostContext.CheckProxy());
+
+            // Request to github.com or ghes server
+            var urlBuilder = new UriBuilder(url);
+            if (UrlUtil.IsHostedServer(urlBuilder))
+            {
+                urlBuilder.Host = $"api.{urlBuilder.Host}";
+                urlBuilder.Path = "";
+            }
+            else
+            {
+                urlBuilder.Path = "api/v3";
+            }
+
+            var checkNode = await CheckNodeJs(urlBuilder.Uri.AbsoluteUri, pat);
+            var result = checkNode.Pass;
+            await File.AppendAllLinesAsync(_logFile, checkNode.Logs);
+
+            // try fix SSL error by providing extra CA certificate.
+            if (checkNode.SslError)
+            {
+                var downloadCert = await HostContext.DownloadExtraCA(urlBuilder.Uri.AbsoluteUri, pat);
+                await File.AppendAllLinesAsync(_logFile, downloadCert.Logs);
+
+                if (downloadCert.Pass)
+                {
+                    var recheckNode = await CheckNodeJs(urlBuilder.Uri.AbsoluteUri, pat, extraCA: true);
+                    await File.AppendAllLinesAsync(_logFile, recheckNode.Logs);
+                    if (recheckNode.Pass)
+                    {
+                        await File.AppendAllLinesAsync(_logFile, new[] { $"{DateTime.UtcNow.ToString("O")} Fixed SSL error by providing extra CA certs." });
+                    }
+                }
+            }
+
+            return result;
+        }
+
+        private async Task<CheckResult> CheckNodeJs(string url, string pat, bool extraCA = false)
+        {
+            var result = new CheckResult();
+            try
+            {
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Make Http request to {url} using node.js ");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+
+                // Request to github.com or ghes server
+                Uri requestUrl = new Uri(url);
+                var env = new Dictionary<string, string>()
+                {
+                    { "HOSTNAME", requestUrl.Host },
+                    { "PORT", requestUrl.IsDefaultPort ? (requestUrl.Scheme.ToLowerInvariant() == "https" ? "443" : "80") : requestUrl.Port.ToString() },
+                    { "PATH", requestUrl.AbsolutePath },
+                    { "PAT", pat }
+                };
+
+                var proxy = HostContext.WebProxy.GetProxy(requestUrl);
+                if (proxy != null)
+                {
+                    env["PROXYHOST"] = proxy.Host;
+                    env["PROXYPORT"] = proxy.IsDefaultPort ? (proxy.Scheme.ToLowerInvariant() == "https" ? "443" : "80") : proxy.Port.ToString();
+                    if (HostContext.WebProxy.HttpProxyUsername != null ||
+                        HostContext.WebProxy.HttpsProxyUsername != null)
+                    {
+                        env["PROXYUSERNAME"] = HostContext.WebProxy.HttpProxyUsername ?? HostContext.WebProxy.HttpsProxyUsername;
+                        env["PROXYPASSWORD"] = HostContext.WebProxy.HttpProxyPassword ?? HostContext.WebProxy.HttpsProxyPassword;
+                    }
+                    else
+                    {
+                        env["PROXYUSERNAME"] = "";
+                        env["PROXYPASSWORD"] = "";
+                    }
+                }
+                else
+                {
+                    env["PROXYHOST"] = "";
+                    env["PROXYPORT"] = "";
+                    env["PROXYUSERNAME"] = "";
+                    env["PROXYPASSWORD"] = "";
+                }
+
+                if (extraCA)
+                {
+                    env["NODE_EXTRA_CA_CERTS"] = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), "download_ca_cert.pem");
+                }
+
+                using (var processInvoker = HostContext.CreateService<IProcessInvoker>())
+                {
+                    processInvoker.OutputDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} [STDOUT] {args.Data}");
+                        }
+                    });
+
+                    processInvoker.ErrorDataReceived += new EventHandler<ProcessDataReceivedEventArgs>((sender, args) =>
+                    {
+                        if (!string.IsNullOrEmpty(args.Data))
+                        {
+                            result.Logs.Add($"{DateTime.UtcNow.ToString("O")} [STDERR] {args.Data}");
+                        }
+                    });
+
+                    var makeWebRequestScript = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Bin), "checkScripts", "makeWebRequest.js");
+                    var node12 = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), "node12", "bin", $"node{IOUtil.ExeExtension}");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} Run '{node12} \"{makeWebRequestScript}\"' ");
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} {StringUtil.ConvertToJson(env)}");
+                    await processInvoker.ExecuteAsync(
+                        HostContext.GetDirectory(WellKnownDirectory.Root),
+                        node12,
+                        $"\"{makeWebRequestScript}\"",
+                        env,
+                        true,
+                        CancellationToken.None);
+                }
+
+                result.Pass = true;
+            }
+            catch (Exception ex)
+            {
+                result.Pass = false;
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Make https request to {url} using node.js failed with error: {ex}");
+                if (result.Logs.Any(x => x.Contains("UNABLE_TO_VERIFY_LEAF_SIGNATURE") ||
+                                         x.Contains("UNABLE_TO_GET_ISSUER_CERT_LOCALLY") ||
+                                         x.Contains("SELF_SIGNED_CERT_IN_CHAIN")))
+                {
+                    result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****     Https request failed due to SSL cert issue.");
+                    result.SslError = true;
+                }
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ****                                                                                                       ****");
+                result.Logs.Add($"{DateTime.UtcNow.ToString("O")} ***************************************************************************************************************");
+            }
+
+            return result;
+        }
+    }
+}

src/Runner.Listener/CommandSettings.cs

@@ -27,6 +27,7 @@ namespace GitHub.Runner.Listener
 
         private readonly string[] validFlags =
         {
+            Constants.Runner.CommandLine.Flags.Check,
             Constants.Runner.CommandLine.Flags.Commit,
             Constants.Runner.CommandLine.Flags.Help,
             Constants.Runner.CommandLine.Flags.Replace,
@@ -42,7 +43,8 @@ namespace GitHub.Runner.Listener
             Constants.Runner.CommandLine.Args.Labels,
             Constants.Runner.CommandLine.Args.MonitorSocketAddress,
             Constants.Runner.CommandLine.Args.Name,
-            Constants.Runner.CommandLine.Args.Pool,
+            Constants.Runner.CommandLine.Args.PAT,
+            Constants.Runner.CommandLine.Args.RunnerGroup,
             Constants.Runner.CommandLine.Args.StartupType,
             Constants.Runner.CommandLine.Args.Token,
             Constants.Runner.CommandLine.Args.Url,
@@ -59,6 +61,7 @@ namespace GitHub.Runner.Listener
         public bool Warmup => TestCommand(Constants.Runner.CommandLine.Commands.Warmup);
 
         // Flags.
+        public bool Check => TestFlag(Constants.Runner.CommandLine.Flags.Check);
         public bool Commit => TestFlag(Constants.Runner.CommandLine.Flags.Commit);
         public bool Help => TestFlag(Constants.Runner.CommandLine.Flags.Help);
         public bool Unattended => TestFlag(Constants.Runner.CommandLine.Flags.Unattended);
@@ -169,6 +172,15 @@ namespace GitHub.Runner.Listener
                 validator: Validators.NonEmptyValidator);
         }
 
+        public string GetRunnerGroupName(string defaultPoolName = null)
+        {
+            return GetArgOrPrompt(
+                name: Constants.Runner.CommandLine.Args.RunnerGroup,
+                description: "Enter the name of the runner group to add this runner to:",
+                defaultValue: defaultPoolName ?? "default",
+                validator: Validators.NonEmptyValidator);
+        }
+
         public string GetToken()
         {
             return GetArgOrPrompt(
@@ -178,6 +190,22 @@ namespace GitHub.Runner.Listener
                 validator: Validators.NonEmptyValidator);
         }
 
+        public string GetGitHubPersonalAccessToken(bool required = false)
+        {
+            if (required)
+            {
+                return GetArgOrPrompt(
+                    name: Constants.Runner.CommandLine.Args.PAT,
+                    description: "What is your GitHub personal access token?",
+                    defaultValue: string.Empty,
+                    validator: Validators.NonEmptyValidator);
+            }
+            else
+            {
+                return GetArg(name: Constants.Runner.CommandLine.Args.PAT);
+            }
+        }
+
         public string GetRunnerRegisterToken()
         {
             return GetArgOrPrompt(

src/Runner.Listener/Configuration/ConfigurationManager.cs

@@ -4,7 +4,6 @@ using GitHub.Runner.Common.Util;
 using GitHub.Runner.Sdk;
 using GitHub.Services.Common;
 using GitHub.Services.OAuth;
-using GitHub.Services.WebApi;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -12,6 +11,7 @@ using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Runtime.InteropServices;
 using System.Security.Cryptography;
+using System.Text;
 using System.Threading.Tasks;
 
 namespace GitHub.Runner.Listener.Configuration
@@ -92,9 +92,11 @@ namespace GitHub.Runner.Listener.Configuration
             _term.WriteSection("Authentication");
             while (true)
             {
-                // Get the URL
+                // When testing against a dev deployment of Actions Service, set this environment variable
+                var useDevActionsServiceUrl = Environment.GetEnvironmentVariable("USE_DEV_ACTIONS_SERVICE_URL");
                 var inputUrl = command.GetUrl();
-                if (inputUrl.Contains("codedev.ms", StringComparison.OrdinalIgnoreCase))
+                if (inputUrl.Contains("codedev.ms", StringComparison.OrdinalIgnoreCase)
+                    || useDevActionsServiceUrl != null)
                 {
                     runnerSettings.ServerUrl = inputUrl;
                     // Get the credentials
@@ -105,8 +107,8 @@ namespace GitHub.Runner.Listener.Configuration
                 else
                 {
                     runnerSettings.GitHubUrl = inputUrl;
-                    var githubToken = command.GetRunnerRegisterToken();
+                    var registerToken = await GetRunnerTokenAsync(command, inputUrl, "registration");
-                    GitHubAuthResult authResult = await GetTenantCredential(inputUrl, githubToken, Constants.RunnerEvent.Register);
+                    GitHubAuthResult authResult = await GetTenantCredential(inputUrl, registerToken, Constants.RunnerEvent.Register);
                     runnerSettings.ServerUrl = authResult.TenantUrl;
                     creds = authResult.ToVssCredentials();
                     Trace.Info("cred retrieved via GitHub auth");
@@ -115,7 +117,20 @@ namespace GitHub.Runner.Listener.Configuration
                 try
                 {
                     // Determine the service deployment type based on connection data. (Hosted/OnPremises)
-                    runnerSettings.IsHostedServer = runnerSettings.GitHubUrl == null || IsHostedServer(new UriBuilder(runnerSettings.GitHubUrl));
+                    runnerSettings.IsHostedServer = runnerSettings.GitHubUrl == null || UrlUtil.IsHostedServer(new UriBuilder(runnerSettings.GitHubUrl));
+
+                    // Warn if the Actions server url and GHES server url has different Host
+                    if (!runnerSettings.IsHostedServer)
+                    {
+                        // Example actionsServerUrl is https://my-ghes/_services/pipelines/[...]
+                        // Example githubServerUrl is https://my-ghes
+                        var actionsServerUrl = new Uri(runnerSettings.ServerUrl);
+                        var githubServerUrl = new Uri(runnerSettings.GitHubUrl);
+                        if (!string.Equals(actionsServerUrl.Authority, githubServerUrl.Authority, StringComparison.OrdinalIgnoreCase))
+                        {
+                            throw new InvalidOperationException($"GitHub Actions is not properly configured in GHES. GHES url: {runnerSettings.GitHubUrl}, Actions url: {runnerSettings.ServerUrl}.");
+                        }
+                    }
 
                     // Validate can connect.
                     await _runnerServer.ConnectAsync(new Uri(runnerSettings.ServerUrl), creds);
@@ -144,17 +159,34 @@ namespace GitHub.Runner.Listener.Configuration
 
             _term.WriteSection("Runner Registration");
 
-            //Get all the agent pools, and select the first private pool
+            // If we have more than one runner group available, allow the user to specify which one to be added into
+            string poolName = null;
+            TaskAgentPool agentPool = null;
             List<TaskAgentPool> agentPools = await _runnerServer.GetAgentPoolsAsync();
-            TaskAgentPool agentPool = agentPools?.Where(x => x.IsHosted == false).FirstOrDefault();
+            TaskAgentPool defaultPool = agentPools?.Where(x => x.IsInternal).FirstOrDefault();
 
-            if (agentPool == null)
+            if (agentPools?.Where(x => !x.IsHosted).Count() > 1)
             {
-                throw new TaskAgentPoolNotFoundException($"Could not find any private pool. Contact support.");
+                poolName = command.GetRunnerGroupName(defaultPool?.Name);
+                _term.WriteLine();
+                agentPool = agentPools.Where(x => string.Equals(poolName, x.Name, StringComparison.OrdinalIgnoreCase) && !x.IsHosted).FirstOrDefault();
             }
             else
             {
-                Trace.Info("Found a private pool with id {1} and name {2}", agentPool.Id, agentPool.Name);
+                agentPool = defaultPool;
+            }
+
+            if (agentPool == null && poolName == null)
+            {
+                throw new TaskAgentPoolNotFoundException($"Could not find any self-hosted runner groups. Contact support.");
+            }
+            else if (agentPool == null && poolName != null)
+            {
+                throw new TaskAgentPoolNotFoundException($"Could not find any self-hosted runner group named \"{poolName}\".");
+            }
+            else
+            {
+                Trace.Info("Found a self-hosted runner group with id {1} and name {2}", agentPool.Id, agentPool.Name);
                 runnerSettings.PoolId = agentPool.Id;
                 runnerSettings.PoolName = agentPool.Name;
             }
@@ -195,7 +227,7 @@ namespace GitHub.Runner.Listener.Configuration
                     else if (command.Unattended)
                     {
                         // if not replace and it is unattended config.
-                        throw new TaskAgentExistsException($"Pool {runnerSettings.PoolId} already contains a runner with name {runnerSettings.AgentName}.");
+                        throw new TaskAgentExistsException($"A runner exists with the same name {runnerSettings.AgentName}.");
                     }
                 }
                 else
@@ -219,36 +251,11 @@ namespace GitHub.Runner.Listener.Configuration
             // Add Agent Id to settings
             runnerSettings.AgentId = agent.Id;
 
-            // respect the serverUrl resolve by server.
-            // in case of agent configured using collection url instead of account url.
-            string agentServerUrl;
-            if (agent.Properties.TryGetValidatedValue<string>("ServerUrl", out agentServerUrl) &&
-                !string.IsNullOrEmpty(agentServerUrl))
-            {
-                Trace.Info($"Agent server url resolve by server: '{agentServerUrl}'.");
-
-                // we need make sure the Schema/Host/Port component of the url remain the same.
-                UriBuilder inputServerUrl = new UriBuilder(runnerSettings.ServerUrl);
-                UriBuilder serverReturnedServerUrl = new UriBuilder(agentServerUrl);
-                if (Uri.Compare(inputServerUrl.Uri, serverReturnedServerUrl.Uri, UriComponents.SchemeAndServer, UriFormat.Unescaped, StringComparison.OrdinalIgnoreCase) != 0)
-                {
-                    inputServerUrl.Path = serverReturnedServerUrl.Path;
-                    Trace.Info($"Replace server returned url's scheme://host:port component with user input server url's scheme://host:port: '{inputServerUrl.Uri.AbsoluteUri}'.");
-                    runnerSettings.ServerUrl = inputServerUrl.Uri.AbsoluteUri;
-                }
-                else
-                {
-                    runnerSettings.ServerUrl = agentServerUrl;
-                }
-            }
-
             // See if the server supports our OAuth key exchange for credentials
             if (agent.Authorization != null &&
                 agent.Authorization.ClientId != Guid.Empty &&
                 agent.Authorization.AuthorizationUrl != null)
             {
-                UriBuilder configServerUrl = new UriBuilder(runnerSettings.ServerUrl);
-                UriBuilder oauthEndpointUrlBuilder = new UriBuilder(agent.Authorization.AuthorizationUrl);
                 var credentialData = new CredentialData
                 {
                     Scheme = Constants.Configuration.OAuth,
@@ -256,7 +263,7 @@ namespace GitHub.Runner.Listener.Configuration
                     {
                         { "clientId", agent.Authorization.ClientId.ToString("D") },
                         { "authorizationUrl", agent.Authorization.AuthorizationUrl.AbsoluteUri },
-                        { "oauthEndpointUrl", oauthEndpointUrlBuilder.Uri.AbsoluteUri },
+                        { "requireFipsCryptography", agent.Properties.GetValue("RequireFipsCryptography", false).ToString() }
                     },
                 };
 
@@ -367,8 +374,8 @@ namespace GitHub.Runner.Listener.Configuration
                     }
                     else
                     {
-                        var githubToken = command.GetRunnerDeletionToken();
+                        var deletionToken = await GetRunnerTokenAsync(command, settings.GitHubUrl, "remove");
-                        GitHubAuthResult authResult = await GetTenantCredential(settings.GitHubUrl, githubToken, Constants.RunnerEvent.Remove);
+                        GitHubAuthResult authResult = await GetTenantCredential(settings.GitHubUrl, deletionToken, Constants.RunnerEvent.Remove);
                         creds = authResult.ToVssCredentials();
                         Trace.Info("cred retrieved via GitHub auth");
                     }
@@ -462,7 +469,7 @@ namespace GitHub.Runner.Listener.Configuration
             // update should replace the existing labels
             agent.Version = BuildConstants.RunnerPackage.Version;
             agent.OSDescription = RuntimeInformation.OSDescription;
-            
+
             agent.Labels.Clear();
 
             agent.Labels.Add(new AgentLabel("self-hosted", LabelType.System));
@@ -473,7 +480,7 @@ namespace GitHub.Runner.Listener.Configuration
             {
                 agent.Labels.Add(new AgentLabel(userLabel, LabelType.User));
             }
-            
+
             return agent;
         }
 
@@ -502,18 +509,107 @@ namespace GitHub.Runner.Listener.Configuration
             return agent;
         }
 
-        private bool IsHostedServer(UriBuilder gitHubUrl)
+        private async Task<string> GetRunnerTokenAsync(CommandSettings command, string githubUrl, string tokenType)
         {
-            return string.Equals(gitHubUrl.Host, "github.com", StringComparison.OrdinalIgnoreCase) ||
+            var githubPAT = command.GetGitHubPersonalAccessToken();
-                string.Equals(gitHubUrl.Host, "www.github.com", StringComparison.OrdinalIgnoreCase) ||
+            var runnerToken = string.Empty;
-                string.Equals(gitHubUrl.Host, "github.localhost", StringComparison.OrdinalIgnoreCase);
+            if (!string.IsNullOrEmpty(githubPAT))
+            {
+                Trace.Info($"Retriving runner {tokenType} token using GitHub PAT.");
+                var jitToken = await GetJITRunnerTokenAsync(githubUrl, githubPAT, tokenType);
+                Trace.Info($"Retrived runner {tokenType} token is good to {jitToken.ExpiresAt}.");
+                HostContext.SecretMasker.AddValue(jitToken.Token);
+                runnerToken = jitToken.Token;
+            }
+
+            if (string.IsNullOrEmpty(runnerToken))
+            {
+                if (string.Equals("registration", tokenType, StringComparison.OrdinalIgnoreCase))
+                {
+                    runnerToken = command.GetRunnerRegisterToken();
+                }
+                else
+                {
+                    runnerToken = command.GetRunnerDeletionToken();
+                }
+            }
+
+            return runnerToken;
+        }
+
+        private async Task<GitHubRunnerRegisterToken> GetJITRunnerTokenAsync(string githubUrl, string githubToken, string tokenType)
+        {
+            var githubApiUrl = "";
+            var gitHubUrlBuilder = new UriBuilder(githubUrl);
+            var path = gitHubUrlBuilder.Path.Split('/', '\\', StringSplitOptions.RemoveEmptyEntries);
+            if (path.Length == 1)
+            {
+                // org runner
+                if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/orgs/{path[0]}/actions/runners/{tokenType}-token";
+                }
+                else
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://{gitHubUrlBuilder.Host}/api/v3/orgs/{path[0]}/actions/runners/{tokenType}-token";
+                }
+            }
+            else if (path.Length == 2)
+            {
+                // repo or enterprise runner.
+                var repoScope = "repos/";
+                if (string.Equals(path[0], "enterprises", StringComparison.OrdinalIgnoreCase))
+                {
+                    repoScope = "";
+                }
+
+                if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/{repoScope}{path[0]}/{path[1]}/actions/runners/{tokenType}-token";
+                }
+                else
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://{gitHubUrlBuilder.Host}/api/v3/{repoScope}{path[0]}/{path[1]}/actions/runners/{tokenType}-token";
+                }
+            }
+            else
+            {
+                throw new ArgumentException($"'{githubUrl}' should point to an org or repository.");
+            }
+
+            using (var httpClientHandler = HostContext.CreateHttpClientHandler())
+            using (var httpClient = new HttpClient(httpClientHandler))
+            {
+                var base64EncodingToken = Convert.ToBase64String(Encoding.UTF8.GetBytes($"github:{githubToken}"));
+                HostContext.SecretMasker.AddValue(base64EncodingToken);
+                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("basic", base64EncodingToken);
+                httpClient.DefaultRequestHeaders.UserAgent.AddRange(HostContext.UserAgents);
+                httpClient.DefaultRequestHeaders.Accept.ParseAdd("application/vnd.github.v3+json");
+
+                var response = await httpClient.PostAsync(githubApiUrl, new StringContent(string.Empty));
+
+                if (response.IsSuccessStatusCode)
+                {
+                    Trace.Info($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}'");
+                    var jsonResponse = await response.Content.ReadAsStringAsync();
+                    return StringUtil.ConvertFromJson<GitHubRunnerRegisterToken>(jsonResponse);
+                }
+                else
+                {
+                    _term.WriteError($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}'");
+                    var errorResponse = await response.Content.ReadAsStringAsync();
+                    _term.WriteError(errorResponse);
+                    response.EnsureSuccessStatusCode();
+                    return null;
+                }
+            }
         }
 
         private async Task<GitHubAuthResult> GetTenantCredential(string githubUrl, string githubToken, string runnerEvent)
         {
             var githubApiUrl = "";
             var gitHubUrlBuilder = new UriBuilder(githubUrl);
-            if (IsHostedServer(gitHubUrlBuilder))
+            if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
             {
                 githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/actions/runner-registration";
             }

src/Runner.Listener/Configuration/CredentialManager.cs

@@ -13,7 +13,7 @@ namespace GitHub.Runner.Listener.Configuration
     public interface ICredentialManager : IRunnerService
     {
         ICredentialProvider GetCredentialProvider(string credType);
-        VssCredentials LoadCredentials(bool preferMigrated = true);
+        VssCredentials LoadCredentials();
     }
 
     public class CredentialManager : RunnerService, ICredentialManager
@@ -40,7 +40,7 @@ namespace GitHub.Runner.Listener.Configuration
             return creds;
         }
 
-        public VssCredentials LoadCredentials(bool preferMigrated = true)
+        public VssCredentials LoadCredentials()
         {
             IConfigurationStore store = HostContext.GetService<IConfigurationStore>();
 
@@ -50,14 +50,16 @@ namespace GitHub.Runner.Listener.Configuration
             }
 
             CredentialData credData = store.GetCredentials();
-
+            var migratedCred = store.GetMigratedCredentials();
-            if (preferMigrated)
+            if (migratedCred != null)
             {
-                var migratedCred = store.GetMigratedCredentials();
+                credData = migratedCred;
-                if (migratedCred != null)
+
-                {
+                // Re-write .credentials with Token URL
-                    credData = migratedCred;
+                store.SaveCredential(credData);
-                }
+
+                // Delete .credentials_migrated
+                store.DeleteMigratedCredential();
             }
 
             ICredentialProvider credProv = GetCredentialProvider(credData.Scheme);
@@ -69,6 +71,16 @@ namespace GitHub.Runner.Listener.Configuration
         }
     }
 
+    [DataContract]
+    public sealed class GitHubRunnerRegisterToken
+    {
+        [DataMember(Name = "token")]
+        public string Token { get; set; }
+
+        [DataMember(Name = "expires_at")]
+        public string ExpiresAt { get; set; }
+    }
+
     [DataContract]
     public sealed class GitHubAuthResult
     {

src/Runner.Listener/Configuration/IRSAKeyManager.cs

@@ -20,7 +20,7 @@ namespace GitHub.Runner.Listener.Configuration
         /// key is returned to the caller.
         /// </summary>
         /// <returns>An <c>RSACryptoServiceProvider</c> instance representing the key for the runner</returns>
-        RSACryptoServiceProvider CreateKey();
+        RSA CreateKey();
 
         /// <summary>
         /// Deletes the RSA key managed by the key manager.
@@ -32,7 +32,7 @@ namespace GitHub.Runner.Listener.Configuration
         /// </summary>
         /// <returns>An <c>RSACryptoServiceProvider</c> instance representing the key for the runner</returns>
         /// <exception cref="CryptographicException">No key exists in the store</exception>
-        RSACryptoServiceProvider GetKey();
+        RSA GetKey();
     }
 
     // Newtonsoft 10 is not working properly with dotnet RSAParameters class

src/Runner.Listener/Configuration/OAuthCredential.cs

@@ -36,7 +36,7 @@ namespace GitHub.Runner.Listener.Configuration
             // We expect the key to be in the machine store at this point. Configuration should have set all of
             // this up correctly so we can use the key to generate access tokens.
             var keyManager = context.GetService<IRSAKeyManager>();
-            var signingCredentials = VssSigningCredentials.Create(() => keyManager.GetKey());
+            var signingCredentials = VssSigningCredentials.Create(() => keyManager.GetKey(), StringUtil.ConvertToBoolean(CredentialData.Data.GetValueOrDefault("requireFipsCryptography"), false));
             var clientCredential = new VssOAuthJwtBearerClientCredential(clientId, authorizationUrl, signingCredentials);
             var agentCredential = new VssOAuthCredential(new Uri(oauthEndpointUrl, UriKind.Absolute), VssOAuthGrant.ClientCredentials, clientCredential);
 

src/Runner.Listener/Configuration/RSAEncryptedFileKeyManager.cs

@@ -13,14 +13,14 @@ namespace GitHub.Runner.Listener.Configuration
         private string _keyFile;
         private IHostContext _context;
 
-        public RSACryptoServiceProvider CreateKey()
+        public RSA CreateKey()
         {
-            RSACryptoServiceProvider rsa = null;
+            RSA rsa = null;
             if (!File.Exists(_keyFile))
             {
                 Trace.Info("Creating new RSA key using 2048-bit key length");
 
-                rsa = new RSACryptoServiceProvider(2048);
+                rsa = RSA.Create(2048);
 
                 // Now write the parameters to disk
                 SaveParameters(rsa.ExportParameters(true));
@@ -30,7 +30,7 @@ namespace GitHub.Runner.Listener.Configuration
             {
                 Trace.Info("Found existing RSA key parameters file {0}", _keyFile);
 
-                rsa = new RSACryptoServiceProvider();
+                rsa = RSA.Create();
                 rsa.ImportParameters(LoadParameters());
             }
 
@@ -46,7 +46,7 @@ namespace GitHub.Runner.Listener.Configuration
             }
         }
 
-        public RSACryptoServiceProvider GetKey()
+        public RSA GetKey()
         {
             if (!File.Exists(_keyFile))
             {
@@ -55,7 +55,7 @@ namespace GitHub.Runner.Listener.Configuration
 
             Trace.Info("Loading RSA key parameters from file {0}", _keyFile);
 
-            var rsa = new RSACryptoServiceProvider();
+            var rsa = RSA.Create();
             rsa.ImportParameters(LoadParameters());
             return rsa;
         }

src/Runner.Listener/Configuration/RSAFileKeyManager.cs

@@ -14,14 +14,14 @@ namespace GitHub.Runner.Listener.Configuration
         private string _keyFile;
         private IHostContext _context;
 
-        public RSACryptoServiceProvider CreateKey()
+        public RSA CreateKey()
         {
-            RSACryptoServiceProvider rsa = null;
+            RSA rsa = null;
             if (!File.Exists(_keyFile))
             {
                 Trace.Info("Creating new RSA key using 2048-bit key length");
 
-                rsa = new RSACryptoServiceProvider(2048);
+                rsa = RSA.Create(2048);
 
                 // Now write the parameters to disk
                 IOUtil.SaveObject(new RSAParametersSerializable(rsa.ExportParameters(true)), _keyFile);
@@ -54,7 +54,7 @@ namespace GitHub.Runner.Listener.Configuration
             {
                 Trace.Info("Found existing RSA key parameters file {0}", _keyFile);
 
-                rsa = new RSACryptoServiceProvider();
+                rsa = RSA.Create();
                 rsa.ImportParameters(IOUtil.LoadObject<RSAParametersSerializable>(_keyFile).RSAParameters);
             }
 
@@ -70,7 +70,7 @@ namespace GitHub.Runner.Listener.Configuration
             }
         }
 
-        public RSACryptoServiceProvider GetKey()
+        public RSA GetKey()
         {
             if (!File.Exists(_keyFile))
             {
@@ -80,7 +80,7 @@ namespace GitHub.Runner.Listener.Configuration
             Trace.Info("Loading RSA key parameters from file {0}", _keyFile);
 
             var parameters = IOUtil.LoadObject<RSAParametersSerializable>(_keyFile).RSAParameters;
-            var rsa = new RSACryptoServiceProvider();
+            var rsa = RSA.Create();
             rsa.ImportParameters(parameters);
             return rsa;
         }

src/Runner.Listener/MessageListener.cs

@@ -13,10 +13,7 @@ using System.Diagnostics;
 using System.Runtime.InteropServices;
 using GitHub.Runner.Common;
 using GitHub.Runner.Sdk;
-using GitHub.Services.WebApi;
-using System.Runtime.CompilerServices;
 
-[assembly: InternalsVisibleTo("Test")]
 namespace GitHub.Runner.Listener
 {
     [ServiceLocator(Default = typeof(MessageListener))]
@@ -35,30 +32,18 @@ namespace GitHub.Runner.Listener
         private ITerminal _term;
         private IRunnerServer _runnerServer;
         private TaskAgentSession _session;
-        private ICredentialManager _credMgr;
-        private IConfigurationStore _configStore;
         private TimeSpan _getNextMessageRetryInterval;
         private readonly TimeSpan _sessionCreationRetryInterval = TimeSpan.FromSeconds(30);
         private readonly TimeSpan _sessionConflictRetryLimit = TimeSpan.FromMinutes(4);
         private readonly TimeSpan _clockSkewRetryLimit = TimeSpan.FromMinutes(30);
         private readonly Dictionary<string, int> _sessionCreationExceptionTracker = new Dictionary<string, int>();
 
-        // Whether load credentials from .credentials_migrated file
-        internal bool _useMigratedCredentials;
-
-        // need to check auth url if there is only .credentials and auth schema is OAuth
-        internal bool _needToCheckAuthorizationUrlUpdate;
-        internal Task<VssCredentials> _authorizationUrlMigrationBackgroundTask;
-        internal Task _authorizationUrlRollbackReattemptDelayBackgroundTask;
-
         public override void Initialize(IHostContext hostContext)
         {
             base.Initialize(hostContext);
 
             _term = HostContext.GetService<ITerminal>();
             _runnerServer = HostContext.GetService<IRunnerServer>();
-            _credMgr = HostContext.GetService<ICredentialManager>();
-            _configStore = HostContext.GetService<IConfigurationStore>();
         }
 
         public async Task<Boolean> CreateSessionAsync(CancellationToken token)
@@ -73,8 +58,8 @@ namespace GitHub.Runner.Listener
 
             // Create connection.
             Trace.Info("Loading Credentials");
-            _useMigratedCredentials = !StringUtil.ConvertToBoolean(Environment.GetEnvironmentVariable("GITHUB_ACTIONS_RUNNER_SPSAUTHURL"));
+            var credMgr = HostContext.GetService<ICredentialManager>();
-            VssCredentials creds = _credMgr.LoadCredentials(_useMigratedCredentials);
+            VssCredentials creds = credMgr.LoadCredentials();
 
             var agent = new TaskAgentReference
             {
@@ -89,17 +74,6 @@ namespace GitHub.Runner.Listener
             string errorMessage = string.Empty;
             bool encounteringError = false;
 
-            var originalCreds = _configStore.GetCredentials();
-            var migratedCreds = _configStore.GetMigratedCredentials();
-            if (migratedCreds == null)
-            {
-                _useMigratedCredentials = false;
-                if (originalCreds.Scheme == Constants.Configuration.OAuth)
-                {
-                    _needToCheckAuthorizationUrlUpdate = true;
-                }
-            }
-
             while (true)
             {
                 token.ThrowIfCancellationRequested();
@@ -127,12 +101,6 @@ namespace GitHub.Runner.Listener
                         encounteringError = false;
                     }
 
-                    if (_needToCheckAuthorizationUrlUpdate)
-                    {
-                        // start background task try to get new authorization url
-                        _authorizationUrlMigrationBackgroundTask = GetNewOAuthAuthorizationSetting(token);
-                    }
-
                     return true;
                 }
                 catch (OperationCanceledException) when (token.IsCancellationRequested)
@@ -164,44 +132,10 @@ namespace GitHub.Runner.Listener
                         }
                     }
 
-                    if (ex is TaskAgentSessionConflictException)
-                    {
-                        try
-                        {
-                            var newCred = await GetNewOAuthAuthorizationSetting(token, true);
-                            if (newCred != null)
-                            {
-                                await _runnerServer.ConnectAsync(new Uri(_settings.ServerUrl), newCred);
-                                Trace.Info("Updated connection to use migrated credential for next CreateSession call.");
-                                _useMigratedCredentials = true;
-                                _authorizationUrlMigrationBackgroundTask = null;
-                                _needToCheckAuthorizationUrlUpdate = false;
-                            }
-                        }
-                        catch (Exception e)
-                        {
-                            Trace.Error("Fail to refresh connection with new authorization url.");
-                            Trace.Error(e);
-                        }
-                    }
-
                     if (!IsSessionCreationExceptionRetriable(ex))
                     {
-                        if (_useMigratedCredentials && !(ex is TaskAgentSessionConflictException))
+                        _term.WriteError($"Failed to create session. {ex.Message}");
-                        {
+                        return false;
-                            // migrated credentials might cause lose permission during permission check,
-                            // we will force to use original credential and try again
-                            _useMigratedCredentials = false;
-                            var reattemptBackoff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromHours(24), TimeSpan.FromHours(36));
-                            _authorizationUrlRollbackReattemptDelayBackgroundTask = HostContext.Delay(reattemptBackoff, token); // retry migrated creds in 24-36 hours.
-                            creds = _credMgr.LoadCredentials(false);
-                            Trace.Error("Fallback to original credentials and try again.");
-                        }
-                        else
-                        {
-                            _term.WriteError($"Failed to create session. {ex.Message}");
-                            return false;
-                        }
                     }
 
                     if (!encounteringError) //print the message only on the first error
@@ -262,51 +196,6 @@ namespace GitHub.Runner.Listener
                         encounteringError = false;
                         continuousError = 0;
                     }
-
-                    if (_needToCheckAuthorizationUrlUpdate &&
-                        _authorizationUrlMigrationBackgroundTask?.IsCompleted == true)
-                    {
-                        if (HostContext.GetService<IJobDispatcher>().Busy ||
-                            HostContext.GetService<ISelfUpdater>().Busy)
-                        {
-                            Trace.Info("Job or runner updates in progress, update credentials next time.");
-                        }
-                        else
-                        {
-                            try
-                            {
-                                var newCred = await _authorizationUrlMigrationBackgroundTask;
-                                await _runnerServer.ConnectAsync(new Uri(_settings.ServerUrl), newCred);
-                                Trace.Info("Updated connection to use migrated credential for next GetMessage call.");
-                                _useMigratedCredentials = true;
-                                _authorizationUrlMigrationBackgroundTask = null;
-                                _needToCheckAuthorizationUrlUpdate = false;
-                            }
-                            catch (Exception ex)
-                            {
-                                Trace.Error("Fail to refresh connection with new authorization url.");
-                                Trace.Error(ex);
-                            }
-                        }
-                    }
-
-                    if (_authorizationUrlRollbackReattemptDelayBackgroundTask?.IsCompleted == true)
-                    {
-                        try
-                        {
-                            // we rolled back to use original creds about 2 days before, now it's a good time to try migrated creds again.
-                            Trace.Info("Re-attempt to use migrated credential");
-                            var migratedCreds = _credMgr.LoadCredentials();
-                            await _runnerServer.ConnectAsync(new Uri(_settings.ServerUrl), migratedCreds);
-                            _useMigratedCredentials = true;
-                            _authorizationUrlRollbackReattemptDelayBackgroundTask = null;
-                        }
-                        catch (Exception ex)
-                        {
-                            Trace.Error("Fail to refresh connection with new authorization url on rollback reattempt.");
-                            Trace.Error(ex);
-                        }
-                    }
                 }
                 catch (OperationCanceledException) when (token.IsCancellationRequested)
                 {
@@ -330,21 +219,7 @@ namespace GitHub.Runner.Listener
                     }
                     else if (!IsGetNextMessageExceptionRetriable(ex))
                     {
-                        if (_useMigratedCredentials)
+                        throw;
-                        {
-                            // migrated credentials might cause lose permission during permission check,
-                            // we will force to use original credential and try again
-                            _useMigratedCredentials = false;
-                            var reattemptBackoff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromHours(24), TimeSpan.FromHours(36));
-                            _authorizationUrlRollbackReattemptDelayBackgroundTask = HostContext.Delay(reattemptBackoff, token); // retry migrated creds in 24-36 hours.
-                            var originalCreds = _credMgr.LoadCredentials(false);
-                            await _runnerServer.ConnectAsync(new Uri(_settings.ServerUrl), originalCreds);
-                            Trace.Error("Fallback to original credentials and try again.");
-                        }
-                        else
-                        {
-                            throw;
-                        }
                     }
                     else
                     {
@@ -444,7 +319,8 @@ namespace GitHub.Runner.Listener
                 var keyManager = HostContext.GetService<IRSAKeyManager>();
                 using (var rsa = keyManager.GetKey())
                 {
-                    return aes.CreateDecryptor(rsa.Decrypt(_session.EncryptionKey.Value, RSAEncryptionPadding.OaepSHA1), message.IV);
+                    var padding = _session.UseFipsEncryption ? RSAEncryptionPadding.OaepSHA256 : RSAEncryptionPadding.OaepSHA1;
+                    return aes.CreateDecryptor(rsa.Decrypt(_session.EncryptionKey.Value, padding), message.IV);
                 }
             }
             else
@@ -536,94 +412,5 @@ namespace GitHub.Runner.Listener
                 return true;
             }
         }
-
-        private async Task<VssCredentials> GetNewOAuthAuthorizationSetting(CancellationToken token, bool adhoc = false)
-        {
-            Trace.Info("Start checking oauth authorization url update.");
-            while (true)
-            {
-                try
-                {
-                    var migratedAuthorizationUrl = await _runnerServer.GetRunnerAuthUrlAsync(_settings.PoolId, _settings.AgentId);
-                    if (!string.IsNullOrEmpty(migratedAuthorizationUrl))
-                    {
-                        var credData = _configStore.GetCredentials();
-                        var clientId = credData.Data.GetValueOrDefault("clientId", null);
-                        var currentAuthorizationUrl = credData.Data.GetValueOrDefault("authorizationUrl", null);
-                        Trace.Info($"Current authorization url: {currentAuthorizationUrl}, new authorization url: {migratedAuthorizationUrl}");
-
-                        if (string.Equals(currentAuthorizationUrl, migratedAuthorizationUrl, StringComparison.OrdinalIgnoreCase))
-                        {
-                            // We don't need to update credentials.
-                            Trace.Info("No needs to update authorization url");
-                            if (adhoc)
-                            {
-                                return null;
-                            }
-                            else
-                            {
-                                await Task.Delay(TimeSpan.FromMilliseconds(-1), token);
-                            }
-                        }
-
-                        var keyManager = HostContext.GetService<IRSAKeyManager>();
-                        var signingCredentials = VssSigningCredentials.Create(() => keyManager.GetKey());
-
-                        var migratedClientCredential = new VssOAuthJwtBearerClientCredential(clientId, migratedAuthorizationUrl, signingCredentials);
-                        var migratedRunnerCredential = new VssOAuthCredential(new Uri(migratedAuthorizationUrl, UriKind.Absolute), VssOAuthGrant.ClientCredentials, migratedClientCredential);
-
-                        Trace.Info("Try connect service with Token Service OAuth endpoint.");
-                        var runnerServer = HostContext.CreateService<IRunnerServer>();
-                        await runnerServer.ConnectAsync(new Uri(_settings.ServerUrl), migratedRunnerCredential);
-                        await runnerServer.GetAgentPoolsAsync();
-                        Trace.Info($"Successfully connected service with new authorization url.");
-
-                        var migratedCredData = new CredentialData
-                        {
-                            Scheme = Constants.Configuration.OAuth,
-                            Data =
-                            {
-                                { "clientId", clientId },
-                                { "authorizationUrl", migratedAuthorizationUrl },
-                                { "oauthEndpointUrl", migratedAuthorizationUrl },
-                            },
-                        };
-
-                        _configStore.SaveMigratedCredential(migratedCredData);
-                        return migratedRunnerCredential;
-                    }
-                    else
-                    {
-                        Trace.Verbose("No authorization url updates");
-                    }
-                }
-                catch (Exception ex) when (!token.IsCancellationRequested)
-                {
-                    Trace.Error("Fail to get/test new authorization url.");
-                    Trace.Error(ex);
-
-                    try
-                    {
-                        await _runnerServer.ReportRunnerAuthUrlErrorAsync(_settings.PoolId, _settings.AgentId, ex.ToString());
-                    }
-                    catch (Exception e)
-                    {
-                        // best effort
-                        Trace.Error("Fail to report the migration error");
-                        Trace.Error(e);
-                    }
-                }
-
-                if (adhoc)
-                {
-                    return null;
-                }
-                else
-                {
-                    var backoff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromMinutes(30), TimeSpan.FromMinutes(45));
-                    await HostContext.Delay(backoff, token);
-                }
-            }
-        }
     }
 }

src/Runner.Listener/Program.cs

@@ -102,7 +102,9 @@ namespace GitHub.Runner.Listener
                 IRunner runner = context.GetService<IRunner>();
                 try
                 {
-                    return await runner.ExecuteCommand(command);
+                    var returnCode = await runner.ExecuteCommand(command);
+                    trace.Info($"Runner execution has finished with return code {returnCode}");
+                    return returnCode;
                 }
                 catch (OperationCanceledException) when (context.RunnerShutdownToken.IsCancellationRequested)
                 {

src/Runner.Listener/Runner.cs

@@ -1,6 +1,5 @@
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Listener.Configuration;
-using GitHub.Runner.Common.Util;
 using System;
 using System.Threading;
 using System.Threading.Tasks;
@@ -11,6 +10,8 @@ using System.Reflection;
 using System.Runtime.CompilerServices;
 using GitHub.Runner.Common;
 using GitHub.Runner.Sdk;
+using System.Linq;
+using GitHub.Runner.Listener.Check;
 
 namespace GitHub.Runner.Listener
 {
@@ -72,6 +73,46 @@ namespace GitHub.Runner.Listener
                     return Constants.Runner.ReturnCode.Success;
                 }
 
+                if (command.Check)
+                {
+                    var url = command.GetUrl();
+                    var pat = command.GetGitHubPersonalAccessToken(required: true);
+                    var checkExtensions = HostContext.GetService<IExtensionManager>().GetExtensions<ICheckExtension>();
+                    var sortedChecks = checkExtensions.OrderBy(x => x.Order);
+                    foreach (var check in sortedChecks)
+                    {
+                        _term.WriteLine($"**********************************************************************************************************************");
+                        _term.WriteLine($"**  Check:               {check.CheckName}");
+                        _term.WriteLine($"**  Description:         {check.CheckDescription}");
+                        _term.WriteLine($"**********************************************************************************************************************");
+                        var result = await check.RunCheck(url, pat);
+                        if (!result)
+                        {
+                            _term.WriteLine($"**                                                                                                                  **");
+                            _term.WriteLine($"**                                            F A I L                                                               **");
+                            _term.WriteLine($"**                                                                                                                  **");
+                            _term.WriteLine($"**********************************************************************************************************************");
+                            _term.WriteLine($"** Log: {check.CheckLog}");
+                            _term.WriteLine($"** Help Doc: {check.HelpLink}");
+                            _term.WriteLine($"**********************************************************************************************************************");
+                        }
+                        else
+                        {
+                            _term.WriteLine($"**                                                                                                                  **");
+                            _term.WriteLine($"**                                            P A S S                                                               **");
+                            _term.WriteLine($"**                                                                                                                  **");
+                            _term.WriteLine($"**********************************************************************************************************************");
+                            _term.WriteLine($"** Log: {check.CheckLog}");
+                            _term.WriteLine($"**********************************************************************************************************************");
+                        }
+
+                        _term.WriteLine();
+                        _term.WriteLine();
+                    }
+
+                    return Constants.Runner.ReturnCode.Success;
+                }
+
                 // Configure runner prompt for args if not supplied
                 // Unattended configure mode will not prompt for args if not supplied and error on any missing or invalid value.
                 if (command.Configure)
@@ -462,13 +503,14 @@ Options:
  --commit   Prints the runner commit
 
 Config Options:
- --unattended     Disable interactive prompts for missing arguments. Defaults will be used for missing options
+ --unattended           Disable interactive prompts for missing arguments. Defaults will be used for missing options
- --url string     Repository to add the runner to. Required if unattended
+ --url string           Repository to add the runner to. Required if unattended
- --token string   Registration token. Required if unattended
+ --token string         Registration token. Required if unattended
- --name string    Name of the runner to configure (default {Environment.MachineName ?? "myrunner"})
+ --name string          Name of the runner to configure (default {Environment.MachineName ?? "myrunner"})
- --labels string  Extra labels in addition to the default: 'self-hosted,{Constants.Runner.Platform},{Constants.Runner.PlatformArchitecture}'
+ --runnergroup string   Name of the runner group to add this runner to (defaults to the default runner group)
- --work string    Relative runner work directory (default {Constants.Path.WorkDirectory})
+ --labels string        Extra labels in addition to the default: 'self-hosted,{Constants.Runner.Platform},{Constants.Runner.PlatformArchitecture}'
- --replace        Replace any existing runner with the same name (default false)");
+ --work string          Relative runner work directory (default {Constants.Path.WorkDirectory})
+ --replace              Replace any existing runner with the same name (default false)");
 #if OS_WINDOWS
     _term.WriteLine($@" --runasservice   Run the runner as a service");
     _term.WriteLine($@" --windowslogonaccount string   Account to run the service as. Requires runasservice");

src/Runner.Plugins/Repository/v1.0/GitSourceProvider.cs

@@ -82,7 +82,7 @@ namespace GitHub.Runner.Plugins.Repository.v1_0
             executionContext.Output($"Syncing repository: {repoFullName}");
 
             // Repository URL
-            var githubUrl = executionContext.GetGitHubContext("url");
+            var githubUrl = executionContext.GetGitHubContext("server_url");
             var githubUri = new Uri(!string.IsNullOrEmpty(githubUrl) ? githubUrl : "https://github.com");
             var portInfo = githubUri.IsDefaultPort ? string.Empty : $":{githubUri.Port}";
             Uri repositoryUrl = new Uri($"{githubUri.Scheme}://{githubUri.Host}{portInfo}/{repoFullName}");

src/Runner.Sdk/ProcessInvoker.cs

@@ -318,7 +318,12 @@ namespace GitHub.Runner.Sdk
                 }
             }
 
-            using (var registration = cancellationToken.Register(async () => await CancelAndKillProcessTree(killProcessOnCancel)))
+            var cancellationFinished = new TaskCompletionSource<bool>();
+            using (var registration = cancellationToken.Register(async () =>
+            {
+                await CancelAndKillProcessTree(killProcessOnCancel);
+                cancellationFinished.TrySetResult(true);
+            }))
             {
                 Trace.Info($"Process started with process id {_proc.Id}, waiting for process exit.");
                 while (true)
@@ -341,6 +346,13 @@ namespace GitHub.Runner.Sdk
                 // data buffers one last time before returning
                 ProcessOutput();
 
+                if (cancellationToken.IsCancellationRequested)
+                {
+                    // Ensure cancellation also finish on the cancellationToken.Register thread.
+                    await cancellationFinished.Task;
+                    Trace.Info($"Process Cancellation finished.");
+                }
+
                 Trace.Info($"Finished process {_proc.Id} with exit code {_proc.ExitCode}, and elapsed time {_stopWatch.Elapsed}.");
             }
 

src/Runner.Sdk/RunnerWebProxy.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Net;
 using System.Text.RegularExpressions;
@@ -71,7 +71,7 @@ namespace GitHub.Runner.Sdk
 
             if (!string.IsNullOrEmpty(httpProxyAddress) && Uri.TryCreate(httpProxyAddress, UriKind.Absolute, out var proxyHttpUri))
             {
-                _httpProxyAddress = proxyHttpUri.AbsoluteUri;
+                _httpProxyAddress = proxyHttpUri.OriginalString;
 
                 // Set both environment variables since there are tools support both casing (curl, wget) and tools support only one casing (docker)
                 Environment.SetEnvironmentVariable("HTTP_PROXY", _httpProxyAddress);
@@ -101,7 +101,7 @@ namespace GitHub.Runner.Sdk
 
             if (!string.IsNullOrEmpty(httpsProxyAddress) && Uri.TryCreate(httpsProxyAddress, UriKind.Absolute, out var proxyHttpsUri))
             {
-                _httpsProxyAddress = proxyHttpsUri.AbsoluteUri;
+                _httpsProxyAddress = proxyHttpsUri.OriginalString;
 
                 // Set both environment variables since there are tools support both casing (curl, wget) and tools support only one casing (docker)
                 Environment.SetEnvironmentVariable("HTTPS_PROXY", _httpsProxyAddress);

src/Runner.Sdk/Util/StringUtil.cs

@@ -30,7 +30,7 @@ namespace GitHub.Runner.Sdk
             //
             // For example, on an en-US box, this is required for loading the encoding for the
             // default console output code page '437'. Without loading the correct encoding for
-            // code page IBM437, some characters cannot be translated correctly, e.g. write 'ç'
+            // code page IBM437, some characters cannot be translated correctly, e.g. write 'ç'
             // from powershell.exe.
             Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
 #endif

src/Runner.Sdk/Util/UrlUtil.cs

@@ -4,6 +4,13 @@ namespace GitHub.Runner.Sdk
 {
     public static class UrlUtil
     {
+        public static bool IsHostedServer(UriBuilder gitHubUrl)
+        {
+            return string.Equals(gitHubUrl.Host, "github.com", StringComparison.OrdinalIgnoreCase) ||
+                string.Equals(gitHubUrl.Host, "www.github.com", StringComparison.OrdinalIgnoreCase) ||
+                string.Equals(gitHubUrl.Host, "github.localhost", StringComparison.OrdinalIgnoreCase);
+        }
+
         public static Uri GetCredentialEmbeddedUrl(Uri baseUrl, string username, string password)
         {
             ArgUtil.NotNull(baseUrl, nameof(baseUrl));

src/Runner.Sdk/Util/WhichUtil.cs

@@ -11,6 +11,11 @@ namespace GitHub.Runner.Sdk
         {
             ArgUtil.NotNullOrEmpty(command, nameof(command));
             trace?.Info($"Which: '{command}'");
+            if (Path.IsPathFullyQualified(command) && File.Exists(command))
+            {
+                trace?.Info($"Fully qualified path: '{command}'");
+                return command;
+            }
             string path = Environment.GetEnvironmentVariable(PathUtil.PathVariable);
             if (string.IsNullOrEmpty(path))
             {

src/Runner.Worker/ActionCommandManager.cs

@@ -1,4 +1,5 @@
 using GitHub.DistributedTask.Pipelines;
+using GitHub.DistributedTask.Pipelines.ContextData;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Common.Util;
 using GitHub.Runner.Worker.Container;
@@ -183,12 +184,49 @@ namespace GitHub.Runner.Worker
 
         public void ProcessCommand(IExecutionContext context, string line, ActionCommand command, ContainerInfo container)
         {
+            var allowUnsecureCommands = false;
+            bool.TryParse(Environment.GetEnvironmentVariable(Constants.Variables.Actions.AllowUnsupportedCommands), out allowUnsecureCommands);
+
+            // Apply environment from env context, env context contains job level env and action's env block
+#if OS_WINDOWS
+            var envContext = context.ExpressionValues["env"] as DictionaryContextData;
+#else
+            var envContext = context.ExpressionValues["env"] as CaseSensitiveDictionaryContextData;
+#endif
+            if (!allowUnsecureCommands && envContext.ContainsKey(Constants.Variables.Actions.AllowUnsupportedCommands))
+            {
+                bool.TryParse(envContext[Constants.Variables.Actions.AllowUnsupportedCommands].ToString(), out allowUnsecureCommands);
+            }
+
+            if (!allowUnsecureCommands)
+            {
+                throw new Exception(String.Format(Constants.Runner.UnsupportedCommandMessageDisabled, this.Command));
+            }
+
             if (!command.Properties.TryGetValue(SetEnvCommandProperties.Name, out string envName) || string.IsNullOrEmpty(envName))
             {
                 throw new Exception("Required field 'name' is missing in ##[set-env] command.");
             }
 
-            context.EnvironmentVariables[envName] = command.Data;
+
+            foreach (var blocked in _setEnvBlockList)
+            {
+                if (string.Equals(blocked, envName, StringComparison.OrdinalIgnoreCase))
+                {
+                    // Log Telemetry and let user know they shouldn't do this
+                    var issue = new Issue()
+                    {
+                        Type = IssueType.Error,
+                        Message = $"Can't update {blocked} environment variable using ::set-env:: command."
+                    };
+                    issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = $"{Constants.Runner.UnsupportedCommand}_{envName}";
+                    context.AddIssue(issue);
+
+                    return;
+                }
+            }
+
+            context.Global.EnvironmentVariables[envName] = command.Data;
             context.SetEnvContext(envName, command.Data);
             context.Debug($"{envName}='{command.Data}'");
         }
@@ -197,6 +235,11 @@ namespace GitHub.Runner.Worker
         {
             public const String Name = "name";
         }
+
+        private string[] _setEnvBlockList = 
+        {
+            "NODE_OPTIONS"
+        };
     }
 
     public sealed class SetOutputCommandExtension : RunnerService, IActionCommandExtension
@@ -281,10 +324,29 @@ namespace GitHub.Runner.Worker
         public Type ExtensionType => typeof(IActionCommandExtension);
 
         public void ProcessCommand(IExecutionContext context, string line, ActionCommand command, ContainerInfo container)
-        {
+        {          
+            var allowUnsecureCommands = false;
+            bool.TryParse(Environment.GetEnvironmentVariable(Constants.Variables.Actions.AllowUnsupportedCommands), out allowUnsecureCommands);
+
+            // Apply environment from env context, env context contains job level env and action's env block
+#if OS_WINDOWS
+            var envContext = context.ExpressionValues["env"] as DictionaryContextData;
+#else
+            var envContext = context.ExpressionValues["env"] as CaseSensitiveDictionaryContextData;
+#endif
+            if (!allowUnsecureCommands && envContext.ContainsKey(Constants.Variables.Actions.AllowUnsupportedCommands))
+            {
+                bool.TryParse(envContext[Constants.Variables.Actions.AllowUnsupportedCommands].ToString(), out allowUnsecureCommands);
+            }
+
+            if (!allowUnsecureCommands)
+            {
+                throw new Exception(String.Format(Constants.Runner.UnsupportedCommandMessageDisabled, this.Command));
+            }
+
             ArgUtil.NotNullOrEmpty(command.Data, "path");
-            context.PrependPath.RemoveAll(x => string.Equals(x, command.Data, StringComparison.CurrentCulture));
+            context.Global.PrependPath.RemoveAll(x => string.Equals(x, command.Data, StringComparison.CurrentCulture));
-            context.PrependPath.Add(command.Data);
+            context.Global.PrependPath.Add(command.Data);
         }
     }
 

src/Runner.Worker/ActionManager.cs

@@ -14,6 +14,7 @@ using GitHub.Runner.Common;
 using GitHub.Runner.Sdk;
 using GitHub.Runner.Worker.Container;
 using GitHub.Services.Common;
+using WebApi = GitHub.DistributedTask.WebApi;
 using Pipelines = GitHub.DistributedTask.Pipelines;
 using PipelineTemplateConstants = GitHub.DistributedTask.Pipelines.ObjectTemplating.PipelineTemplateConstants;
 
@@ -65,7 +66,7 @@ namespace GitHub.Runner.Worker
 
             // TODO: Deprecate the PREVIEW_ACTION_TOKEN
             // Log even if we aren't using it to ensure users know.
-            if (!string.IsNullOrEmpty(executionContext.Variables.Get("PREVIEW_ACTION_TOKEN")))
+            if (!string.IsNullOrEmpty(executionContext.Global.Variables.Get("PREVIEW_ACTION_TOKEN")))
             {
                 executionContext.Warning("The 'PREVIEW_ACTION_TOKEN' secret is deprecated. Please remove it from the repository's secrets");
             }
@@ -73,6 +74,11 @@ namespace GitHub.Runner.Worker
             // Clear the cache (for self-hosted runners)
             IOUtil.DeleteDirectory(HostContext.GetDirectory(WellKnownDirectory.Actions), executionContext.CancellationToken);
 
+            // todo: Remove when feature flag DistributedTask.NewActionMetadata is removed
+            var newActionMetadata = executionContext.Global.Variables.GetBoolean("DistributedTask.NewActionMetadata") ?? false;
+
+            var repositoryActions = new List<Pipelines.ActionStep>();
+
             foreach (var action in actions)
             {
                 if (action.Reference.Type == Pipelines.ActionSourceType.ContainerRegistry)
@@ -90,7 +96,8 @@ namespace GitHub.Runner.Worker
                     Trace.Info($"Action {action.Name} ({action.Id}) needs to pull image '{containerReference.Image}'");
                     imagesToPull[containerReference.Image].Add(action.Id);
                 }
-                else if (action.Reference.Type == Pipelines.ActionSourceType.Repository)
+                // todo: Remove when feature flag DistributedTask.NewActionMetadata is removed
+                else if (action.Reference.Type == Pipelines.ActionSourceType.Repository && !newActionMetadata)
                 {
                     // only download the repository archive
                     await DownloadRepositoryActionAsync(executionContext, action);
@@ -124,6 +131,81 @@ namespace GitHub.Runner.Worker
                         }
                     }
 
+                    var repoAction = action.Reference as Pipelines.RepositoryPathReference;
+                    if (repoAction.RepositoryType != Pipelines.PipelineConstants.SelfAlias)
+                    {
+                        var definition = LoadAction(executionContext, action);
+                        if (definition.Data.Execution.HasPre)
+                        {
+                            var actionRunner = HostContext.CreateService<IActionRunner>();
+                            actionRunner.Action = action;
+                            actionRunner.Stage = ActionRunStage.Pre;
+                            actionRunner.Condition = definition.Data.Execution.InitCondition;
+
+                            Trace.Info($"Add 'pre' execution for {action.Id}");
+                            preStepTracker[action.Id] = actionRunner;
+                        }
+                    }
+                }
+                else if (action.Reference.Type == Pipelines.ActionSourceType.Repository && newActionMetadata)
+                {
+                    repositoryActions.Add(action);
+                }
+            }
+
+            if (repositoryActions.Count > 0)
+            {
+                // Get the download info
+                var downloadInfos = await GetDownloadInfoAsync(executionContext, repositoryActions);
+
+                // Download each action
+                foreach (var action in repositoryActions)
+                {
+                    var lookupKey = GetDownloadInfoLookupKey(action);
+                    if (string.IsNullOrEmpty(lookupKey))
+                    {
+                        continue;
+                    }
+
+                    if (!downloadInfos.TryGetValue(lookupKey, out var downloadInfo))
+                    {
+                        throw new Exception($"Missing download info for {lookupKey}");
+                    }
+
+                    await DownloadRepositoryActionAsync(executionContext, downloadInfo);
+                }
+
+                // More preparation based on content in the repository (action.yml)
+                foreach (var action in repositoryActions)
+                {
+                    var setupInfo = PrepareRepositoryActionAsync(executionContext, action);
+                    if (setupInfo != null)
+                    {
+                        if (!string.IsNullOrEmpty(setupInfo.Image))
+                        {
+                            if (!imagesToPull.ContainsKey(setupInfo.Image))
+                            {
+                                imagesToPull[setupInfo.Image] = new List<Guid>();
+                            }
+
+                            Trace.Info($"Action {action.Name} ({action.Id}) from repository '{setupInfo.ActionRepository}' needs to pull image '{setupInfo.Image}'");
+                            imagesToPull[setupInfo.Image].Add(action.Id);
+                        }
+                        else
+                        {
+                            ArgUtil.NotNullOrEmpty(setupInfo.ActionRepository, nameof(setupInfo.ActionRepository));
+
+                            if (!imagesToBuild.ContainsKey(setupInfo.ActionRepository))
+                            {
+                                imagesToBuild[setupInfo.ActionRepository] = new List<Guid>();
+                            }
+
+                            Trace.Info($"Action {action.Name} ({action.Id}) from repository '{setupInfo.ActionRepository}' needs to build image '{setupInfo.Dockerfile}'");
+                            imagesToBuild[setupInfo.ActionRepository].Add(action.Id);
+                            imagesToBuildInfo[setupInfo.ActionRepository] = setupInfo;
+                        }
+                    }
+
                     var repoAction = action.Reference as Pipelines.RepositoryPathReference;
                     if (repoAction.RepositoryType != Pipelines.PipelineConstants.SelfAlias)
                     {
@@ -313,6 +395,14 @@ namespace GitHub.Runner.Worker
                             Trace.Info($"Action cleanup plugin: {plugin.PluginTypeName}.");
                         }
                     }
+                    else if (definition.Data.Execution.ExecutionType == ActionExecutionType.Composite)
+                    {
+                        var compositeAction = definition.Data.Execution as CompositeActionExecutionData;
+                        Trace.Info($"Load {compositeAction.Steps?.Count ?? 0} action steps.");
+                        Trace.Verbose($"Details: {StringUtil.ConvertToJson(compositeAction?.Steps)}");
+                        Trace.Info($"Load: {compositeAction.Outputs?.Count ?? 0} number of outputs");
+                        Trace.Info($"Details: {StringUtil.ConvertToJson(compositeAction?.Outputs)}");
+                    }
                     else
                     {
                         throw new NotSupportedException(definition.Data.Execution.ExecutionType.ToString());
@@ -378,7 +468,7 @@ namespace GitHub.Runner.Worker
             ArgUtil.NotNull(setupInfo, nameof(setupInfo));
             ArgUtil.NotNullOrEmpty(setupInfo.Container.Image, nameof(setupInfo.Container.Image));
 
-            executionContext.Output($"Pull down action image '{setupInfo.Container.Image}'");
+            executionContext.Output($"##[group]Pull down action image '{setupInfo.Container.Image}'");
 
             // Pull down docker image with retry up to 3 times
             var dockerManger = HostContext.GetService<IDockerCommandManager>();
@@ -402,6 +492,7 @@ namespace GitHub.Runner.Worker
                     }
                 }
             }
+            executionContext.Output("##[endgroup]");
 
             if (retryCount == 3 && pullExitCode != 0)
             {
@@ -421,7 +512,7 @@ namespace GitHub.Runner.Worker
             ArgUtil.NotNull(setupInfo, nameof(setupInfo));
             ArgUtil.NotNullOrEmpty(setupInfo.Container.Dockerfile, nameof(setupInfo.Container.Dockerfile));
 
-            executionContext.Output($"Build container for action use: '{setupInfo.Container.Dockerfile}'.");
+            executionContext.Output($"##[group]Build container for action use: '{setupInfo.Container.Dockerfile}'.");
 
             // Build docker image with retry up to 3 times
             var dockerManger = HostContext.GetService<IDockerCommandManager>();
@@ -451,6 +542,7 @@ namespace GitHub.Runner.Worker
                     }
                 }
             }
+            executionContext.Output("##[endgroup]");
 
             if (retryCount == 3 && buildExitCode != 0)
             {
@@ -464,6 +556,98 @@ namespace GitHub.Runner.Worker
             }
         }
 
+        // This implementation is temporary and will be replaced with a REST API call to the service to resolve
+        private async Task<IDictionary<string, WebApi.ActionDownloadInfo>> GetDownloadInfoAsync(IExecutionContext executionContext, List<Pipelines.ActionStep> actions)
+        {
+            executionContext.Output("Getting action download info");
+
+            // Convert to action reference
+            var actionReferences = actions
+                .GroupBy(x => GetDownloadInfoLookupKey(x))
+                .Where(x => !string.IsNullOrEmpty(x.Key))
+                .Select(x =>
+                {
+                    var action = x.First();
+                    var repositoryReference = action.Reference as Pipelines.RepositoryPathReference;
+                    ArgUtil.NotNull(repositoryReference, nameof(repositoryReference));
+                    return new WebApi.ActionReference
+                    {
+                        NameWithOwner = repositoryReference.Name,
+                        Ref = repositoryReference.Ref,
+                    };
+                })
+                .ToList();
+
+            // Nothing to resolve?
+            if (actionReferences.Count == 0)
+            {
+                return new Dictionary<string, WebApi.ActionDownloadInfo>();
+            }
+
+            // Resolve download info
+            var jobServer = HostContext.GetService<IJobServer>();
+            var actionDownloadInfos = default(WebApi.ActionDownloadInfoCollection);
+            for (var attempt = 1; attempt <= 3; attempt++)
+            {
+                try
+                {
+                    actionDownloadInfos = await jobServer.ResolveActionDownloadInfoAsync(executionContext.Global.Plan.ScopeIdentifier, executionContext.Global.Plan.PlanType, executionContext.Global.Plan.PlanId, new WebApi.ActionReferenceList { Actions = actionReferences }, executionContext.CancellationToken);
+                    break;
+                }
+                catch (Exception ex) when (!executionContext.CancellationToken.IsCancellationRequested) // Do not retry if the run is canceled.
+                {
+                    if (attempt < 3)
+                    {
+                        executionContext.Output($"Failed to resolve action download info. Error: {ex.Message}");
+                        executionContext.Debug(ex.ToString());
+                        if (String.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GITHUB_ACTION_DOWNLOAD_NO_BACKOFF")))
+                        {
+                            var backoff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(30));
+                            executionContext.Output($"Retrying in {backoff.TotalSeconds} seconds");
+                            await Task.Delay(backoff);
+                        }
+                    }
+                    else
+                    {
+                        // Some possible cases are:
+                        // * Repo is rate limited
+                        // * Repo or tag doesn't exist, or isn't public
+                        if (ex is WebApi.UnresolvableActionDownloadInfoException)
+                        {
+                            throw;
+                        }
+                        else
+                        {
+                            // This exception will be traced as an infrastructure failure
+                            throw new WebApi.FailedToResolveActionDownloadInfoException("Failed to resolve action download info.", ex);
+                        }
+                    }
+                }
+            }
+
+            ArgUtil.NotNull(actionDownloadInfos, nameof(actionDownloadInfos));
+            ArgUtil.NotNull(actionDownloadInfos.Actions, nameof(actionDownloadInfos.Actions));
+            var apiUrl = GetApiUrl(executionContext);
+            var defaultAccessToken = executionContext.GetGitHubContext("token");
+            var configurationStore = HostContext.GetService<IConfigurationStore>();
+            var runnerSettings = configurationStore.GetSettings();
+
+            foreach (var actionDownloadInfo in actionDownloadInfos.Actions.Values)
+            {
+                // Add secret
+                HostContext.SecretMasker.AddValue(actionDownloadInfo.Authentication?.Token);
+
+                // Default auth token
+                if (string.IsNullOrEmpty(actionDownloadInfo.Authentication?.Token))
+                {
+                    actionDownloadInfo.Authentication = new WebApi.ActionDownloadAuthentication { Token = defaultAccessToken };
+                }
+            }
+
+            return actionDownloadInfos.Actions;
+        }
+
+        // todo: Remove when feature flag DistributedTask.NewActionMetadata is removed
         private async Task DownloadRepositoryActionAsync(IExecutionContext executionContext, Pipelines.ActionStep repositoryAction)
         {
             Trace.Entering();
@@ -507,9 +691,8 @@ namespace GitHub.Runner.Worker
             {
                 string apiUrl = GetApiUrl(executionContext);
                 string archiveLink = BuildLinkToActionArchive(apiUrl, repositoryReference.Name, repositoryReference.Ref);
-                Trace.Info($"Download archive '{archiveLink}' to '{destDirectory}'.");
                 var downloadDetails = new ActionDownloadDetails(archiveLink, ConfigureAuthorizationFromContext);
-                await DownloadRepositoryActionAsync(executionContext, downloadDetails, destDirectory);
+                await DownloadRepositoryActionAsync(executionContext, downloadDetails, null, destDirectory);
                 return;
             }
             else
@@ -533,10 +716,9 @@ namespace GitHub.Runner.Worker
 
                 foreach (var downloadAttempt in downloadAttempts)
                 {
-                    Trace.Info($"Download archive '{downloadAttempt.ArchiveLink}' to '{destDirectory}'.");
                     try
                     {
-                        await DownloadRepositoryActionAsync(executionContext, downloadAttempt, destDirectory);
+                        await DownloadRepositoryActionAsync(executionContext, downloadAttempt, null, destDirectory);
                         return;
                     }
                     catch (ActionNotFoundException)
@@ -549,6 +731,32 @@ namespace GitHub.Runner.Worker
             }
         }
 
+        private async Task DownloadRepositoryActionAsync(IExecutionContext executionContext, WebApi.ActionDownloadInfo downloadInfo)
+        {
+            Trace.Entering();
+            ArgUtil.NotNull(executionContext, nameof(executionContext));
+            ArgUtil.NotNull(downloadInfo, nameof(downloadInfo));
+            ArgUtil.NotNullOrEmpty(downloadInfo.NameWithOwner, nameof(downloadInfo.NameWithOwner));
+            ArgUtil.NotNullOrEmpty(downloadInfo.Ref, nameof(downloadInfo.Ref));
+
+            string destDirectory = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Actions), downloadInfo.NameWithOwner.Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar), downloadInfo.Ref);
+            string watermarkFile = GetWatermarkFilePath(destDirectory);
+            if (File.Exists(watermarkFile))
+            {
+                executionContext.Debug($"Action '{downloadInfo.NameWithOwner}@{downloadInfo.Ref}' already downloaded at '{destDirectory}'.");
+                return;
+            }
+            else
+            {
+                // make sure we get a clean folder ready to use.
+                IOUtil.DeleteDirectory(destDirectory, executionContext.CancellationToken);
+                Directory.CreateDirectory(destDirectory);
+                executionContext.Output($"Download action repository '{downloadInfo.NameWithOwner}@{downloadInfo.Ref}'");
+            }
+
+            await DownloadRepositoryActionAsync(executionContext, null, downloadInfo, destDirectory);
+        }
+
         private string GetApiUrl(IExecutionContext executionContext)
         {
             string apiUrl = executionContext.GetGitHubContext("api_url");
@@ -569,7 +777,8 @@ namespace GitHub.Runner.Worker
 #endif
         }
 
-        private async Task DownloadRepositoryActionAsync(IExecutionContext executionContext, ActionDownloadDetails actionDownloadDetails, string destDirectory)
+        // todo: Remove the parameter "actionDownloadDetails" when feature flag DistributedTask.NewActionMetadata is removed
+        private async Task DownloadRepositoryActionAsync(IExecutionContext executionContext, ActionDownloadDetails actionDownloadDetails, WebApi.ActionDownloadInfo downloadInfo, string destDirectory)
         {
             //download and extract action in a temp folder and rename it on success
             string tempDirectory = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Actions), "_temp_" + Guid.NewGuid());
@@ -577,11 +786,12 @@ namespace GitHub.Runner.Worker
 
 #if OS_WINDOWS
             string archiveFile = Path.Combine(tempDirectory, $"{Guid.NewGuid()}.zip");
+            string link = downloadInfo?.ZipballUrl ?? actionDownloadDetails.ArchiveLink;
 #else
             string archiveFile = Path.Combine(tempDirectory, $"{Guid.NewGuid()}.tar.gz");
+            string link = downloadInfo?.TarballUrl ?? actionDownloadDetails.ArchiveLink;
 #endif
 
-            string link = actionDownloadDetails.ArchiveLink;
             Trace.Info($"Save archive '{link}' into {archiveFile}.");
             try
             {
@@ -601,7 +811,16 @@ namespace GitHub.Runner.Worker
                             using (var httpClientHandler = HostContext.CreateHttpClientHandler())
                             using (var httpClient = new HttpClient(httpClientHandler))
                             {
-                                actionDownloadDetails.ConfigureAuthorization(executionContext, httpClient);
+                                // Legacy
+                                if (downloadInfo == null)
+                                {
+                                    actionDownloadDetails.ConfigureAuthorization(executionContext, httpClient);
+                                }
+                                // FF DistributedTask.NewActionMetadata
+                                else
+                                {
+                                    httpClient.DefaultRequestHeaders.Authorization = CreateAuthHeader(downloadInfo.Authentication?.Token);
+                                }
 
                                 httpClient.DefaultRequestHeaders.UserAgent.AddRange(HostContext.UserAgents);
                                 using (var response = await httpClient.GetAsync(link))
@@ -741,13 +960,14 @@ namespace GitHub.Runner.Worker
             }
         }
 
+        // todo: Remove when feature flag DistributedTask.NewActionMetadata is removed
         private void ConfigureAuthorizationFromContext(IExecutionContext executionContext, HttpClient httpClient)
         {
             var authToken = Environment.GetEnvironmentVariable("_GITHUB_ACTION_TOKEN");
             if (string.IsNullOrEmpty(authToken))
             {
                 // TODO: Deprecate the PREVIEW_ACTION_TOKEN
-                authToken = executionContext.Variables.Get("PREVIEW_ACTION_TOKEN");
+                authToken = executionContext.Global.Variables.Get("PREVIEW_ACTION_TOKEN");
             }
 
             if (!string.IsNullOrEmpty(authToken))
@@ -846,6 +1066,11 @@ namespace GitHub.Runner.Worker
                     Trace.Info($"Action plugin: {(actionDefinitionData.Execution as PluginActionExecutionData).Plugin}, no more preparation.");
                     return null;
                 }
+                else if (actionDefinitionData.Execution.ExecutionType == ActionExecutionType.Composite)
+                {
+                    Trace.Info($"Action composite: {(actionDefinitionData.Execution as CompositeActionExecutionData).Steps}, no more preparation.");
+                    return null;
+                }
                 else
                 {
                     throw new NotSupportedException(actionDefinitionData.Execution.ExecutionType.ToString());
@@ -872,6 +1097,51 @@ namespace GitHub.Runner.Worker
             }
         }
 
+        private static string GetDownloadInfoLookupKey(Pipelines.ActionStep action)
+        {
+            if (action.Reference.Type != Pipelines.ActionSourceType.Repository)
+            {
+                return null;
+            }
+
+            var repositoryReference = action.Reference as Pipelines.RepositoryPathReference;
+            ArgUtil.NotNull(repositoryReference, nameof(repositoryReference));
+
+            if (string.Equals(repositoryReference.RepositoryType, Pipelines.PipelineConstants.SelfAlias, StringComparison.OrdinalIgnoreCase))
+            {
+                return null;
+            }
+
+            if (!string.Equals(repositoryReference.RepositoryType, Pipelines.RepositoryTypes.GitHub, StringComparison.OrdinalIgnoreCase))
+            {
+                throw new NotSupportedException(repositoryReference.RepositoryType);
+            }
+
+            ArgUtil.NotNullOrEmpty(repositoryReference.Name, nameof(repositoryReference.Name));
+            ArgUtil.NotNullOrEmpty(repositoryReference.Ref, nameof(repositoryReference.Ref));
+            return $"{repositoryReference.Name}@{repositoryReference.Ref}";
+        }
+
+        private static string GetDownloadInfoLookupKey(WebApi.ActionDownloadInfo info)
+        {
+            ArgUtil.NotNullOrEmpty(info.NameWithOwner, nameof(info.NameWithOwner));
+            ArgUtil.NotNullOrEmpty(info.Ref, nameof(info.Ref));
+            return $"{info.NameWithOwner}@{info.Ref}";
+        }
+
+        private AuthenticationHeaderValue CreateAuthHeader(string token)
+        {
+            if (string.IsNullOrEmpty(token))
+            {
+                return null;
+            }
+
+            var base64EncodingToken = Convert.ToBase64String(Encoding.UTF8.GetBytes($"x-access-token:{token}"));
+            HostContext.SecretMasker.AddValue(base64EncodingToken);
+            return new AuthenticationHeaderValue("Basic", base64EncodingToken);
+        }
+
+        // todo: Remove when feature flag DistributedTask.NewActionMetadata is removed
         private class ActionDownloadDetails
         {
             public string ArchiveLink { get; }
@@ -911,6 +1181,7 @@ namespace GitHub.Runner.Worker
         NodeJS,
         Plugin,
         Script,
+        Composite,
     }
 
     public sealed class ContainerActionExecutionData : ActionExecutionData
@@ -967,6 +1238,15 @@ namespace GitHub.Runner.Worker
         public override bool HasPost => false;
     }
 
+    public sealed class CompositeActionExecutionData : ActionExecutionData
+    {
+        public override ActionExecutionType ExecutionType => ActionExecutionType.Composite;
+        public override bool HasPre => false;
+        public override bool HasPost => false;
+        public List<Pipelines.ActionStep> Steps { get; set; }
+        public MappingToken Outputs { get; set; }
+    }
+
     public abstract class ActionExecutionData
     {
         private string _initCondition = $"{Constants.Expressions.Always}()";

src/Runner.Worker/ActionManifestManager.cs

@@ -14,6 +14,7 @@ using YamlDotNet.Core;
 using YamlDotNet.Core.Events;
 using System.Globalization;
 using System.Linq;
+using Pipelines = GitHub.DistributedTask.Pipelines;
 
 namespace GitHub.Runner.Worker
 {
@@ -22,6 +23,8 @@ namespace GitHub.Runner.Worker
     {
         ActionDefinitionData Load(IExecutionContext executionContext, string manifestFile);
 
+        DictionaryContextData EvaluateCompositeOutputs(IExecutionContext executionContext, TemplateToken token, IDictionary<string, PipelineContextData> extraExpressionValues);
+
         List<string> EvaluateContainerArguments(IExecutionContext executionContext, SequenceToken token, IDictionary<string, PipelineContextData> extraExpressionValues);
 
         Dictionary<string, string> EvaluateContainerEnvironment(IExecutionContext executionContext, MappingToken token, IDictionary<string, PipelineContextData> extraExpressionValues);
@@ -32,8 +35,6 @@ namespace GitHub.Runner.Worker
     public sealed class ActionManifestManager : RunnerService, IActionManifestManager
     {
         private TemplateSchema _actionManifestSchema;
-        private IReadOnlyList<String> _fileTable;
-
         public override void Initialize(IHostContext hostContext)
         {
             base.Initialize(hostContext);
@@ -54,25 +55,45 @@ namespace GitHub.Runner.Worker
 
         public ActionDefinitionData Load(IExecutionContext executionContext, string manifestFile)
         {
-            var context = CreateContext(executionContext);
+            var templateContext = CreateTemplateContext(executionContext);
             ActionDefinitionData actionDefinition = new ActionDefinitionData();
+
+            // Clean up file name real quick
+            // Instead of using Regex which can be computationally expensive, 
+            // we can just remove the # of characters from the fileName according to the length of the basePath
+            string basePath = HostContext.GetDirectory(WellKnownDirectory.Actions);
+            string fileRelativePath = manifestFile;
+            if (manifestFile.Contains(basePath))
+            {
+                fileRelativePath = manifestFile.Remove(0, basePath.Length + 1);
+            }
+
             try
             {
                 var token = default(TemplateToken);
 
                 // Get the file ID
-                var fileId = context.GetFileId(manifestFile);
+                var fileId = templateContext.GetFileId(fileRelativePath);
-                _fileTable = context.GetFileTable();
+
+                // Add this file to the FileTable in executionContext if it hasn't been added already
+                // we use > since fileID is 1 indexed
+                if (fileId > executionContext.Global.FileTable.Count)
+                {
+                    executionContext.Global.FileTable.Add(fileRelativePath);
+                }
 
                 // Read the file
                 var fileContent = File.ReadAllText(manifestFile);
                 using (var stringReader = new StringReader(fileContent))
                 {
-                    var yamlObjectReader = new YamlObjectReader(null, stringReader);
+                    var yamlObjectReader = new YamlObjectReader(fileId, stringReader);
-                    token = TemplateReader.Read(context, "action-root", yamlObjectReader, fileId, out _);
+                    token = TemplateReader.Read(templateContext, "action-root", yamlObjectReader, fileId, out _);
                 }
 
                 var actionMapping = token.AssertMapping("action manifest root");
+                var actionOutputs = default(MappingToken);
+                var actionRunValueToken = default(TemplateToken);
+
                 foreach (var actionPair in actionMapping)
                 {
                     var propertyName = actionPair.Key.AssertString($"action.yml property key");
@@ -83,44 +104,56 @@ namespace GitHub.Runner.Worker
                             actionDefinition.Name = actionPair.Value.AssertString("name").Value;
                             break;
 
+                        case "outputs":
+                            actionOutputs = actionPair.Value.AssertMapping("outputs");
+                            break;
+
                         case "description":
                             actionDefinition.Description = actionPair.Value.AssertString("description").Value;
                             break;
 
                         case "inputs":
-                            ConvertInputs(context, actionPair.Value, actionDefinition);
+                            ConvertInputs(actionPair.Value, actionDefinition);
                             break;
 
                         case "runs":
-                            actionDefinition.Execution = ConvertRuns(context, actionPair.Value);
+                            // Defer runs token evaluation to after for loop to ensure that order of outputs doesn't matter.
+                            actionRunValueToken = actionPair.Value;
                             break;
+
                         default:
                             Trace.Info($"Ignore action property {propertyName}.");
                             break;
                     }
                 }
+
+                // Evaluate Runs Last
+                if (actionRunValueToken != null)
+                {
+                    actionDefinition.Execution = ConvertRuns(executionContext, templateContext, actionRunValueToken, fileRelativePath, actionOutputs);
+                }
             }
             catch (Exception ex)
             {
                 Trace.Error(ex);
-                context.Errors.Add(ex);
+                templateContext.Errors.Add(ex);
             }
 
-            if (context.Errors.Count > 0)
+            if (templateContext.Errors.Count > 0)
             {
-                foreach (var error in context.Errors)
+                foreach (var error in templateContext.Errors)
                 {
                     Trace.Error($"Action.yml load error: {error.Message}");
                     executionContext.Error(error.Message);
                 }
 
-                throw new ArgumentException($"Fail to load {manifestFile}");
+                throw new ArgumentException($"Fail to load {fileRelativePath}");
             }
 
             if (actionDefinition.Execution == null)
             {
                 executionContext.Debug($"Loaded action.yml file: {StringUtil.ConvertToJson(actionDefinition)}");
-                throw new ArgumentException($"Top level 'runs:' section is required for {manifestFile}");
+                throw new ArgumentException($"Top level 'runs:' section is required for {fileRelativePath}");
             }
             else
             {
@@ -130,6 +163,33 @@ namespace GitHub.Runner.Worker
             return actionDefinition;
         }
 
+        public DictionaryContextData EvaluateCompositeOutputs(
+            IExecutionContext executionContext,
+            TemplateToken token,
+            IDictionary<string, PipelineContextData> extraExpressionValues)
+        {
+            var result = default(DictionaryContextData);
+
+            if (token != null)
+            {
+                var templateContext = CreateTemplateContext(executionContext, extraExpressionValues);
+                try
+                {
+                    token = TemplateEvaluator.Evaluate(templateContext, "outputs", token, 0, null, omitHeader: true);
+                    templateContext.Errors.Check();
+                    result = token.ToContextData().AssertDictionary("composite outputs");
+                }
+                catch (Exception ex) when (!(ex is TemplateValidationException))
+                {
+                    templateContext.Errors.Add(ex);
+                }
+
+                templateContext.Errors.Check();
+            }
+
+            return result ?? new DictionaryContextData();
+        }
+
         public List<string> EvaluateContainerArguments(
             IExecutionContext executionContext,
             SequenceToken token,
@@ -139,11 +199,11 @@ namespace GitHub.Runner.Worker
 
             if (token != null)
             {
-                var context = CreateContext(executionContext, extraExpressionValues);
+                var templateContext = CreateTemplateContext(executionContext, extraExpressionValues);
                 try
                 {
-                    var evaluateResult = TemplateEvaluator.Evaluate(context, "container-runs-args", token, 0, null, omitHeader: true);
+                    var evaluateResult = TemplateEvaluator.Evaluate(templateContext, "container-runs-args", token, 0, null, omitHeader: true);
-                    context.Errors.Check();
+                    templateContext.Errors.Check();
 
                     Trace.Info($"Arguments evaluate result: {StringUtil.ConvertToJson(evaluateResult)}");
 
@@ -160,10 +220,10 @@ namespace GitHub.Runner.Worker
                 catch (Exception ex) when (!(ex is TemplateValidationException))
                 {
                     Trace.Error(ex);
-                    context.Errors.Add(ex);
+                    templateContext.Errors.Add(ex);
                 }
 
-                context.Errors.Check();
+                templateContext.Errors.Check();
             }
 
             return result;
@@ -178,11 +238,11 @@ namespace GitHub.Runner.Worker
 
             if (token != null)
             {
-                var context = CreateContext(executionContext, extraExpressionValues);
+                var templateContext = CreateTemplateContext(executionContext, extraExpressionValues);
                 try
                 {
-                    var evaluateResult = TemplateEvaluator.Evaluate(context, "container-runs-env", token, 0, null, omitHeader: true);
+                    var evaluateResult = TemplateEvaluator.Evaluate(templateContext, "container-runs-env", token, 0, null, omitHeader: true);
-                    context.Errors.Check();
+                    templateContext.Errors.Check();
 
                     Trace.Info($"Environments evaluate result: {StringUtil.ConvertToJson(evaluateResult)}");
 
@@ -204,10 +264,10 @@ namespace GitHub.Runner.Worker
                 catch (Exception ex) when (!(ex is TemplateValidationException))
                 {
                     Trace.Error(ex);
-                    context.Errors.Add(ex);
+                    templateContext.Errors.Add(ex);
                 }
 
-                context.Errors.Check();
+                templateContext.Errors.Check();
             }
 
             return result;
@@ -221,11 +281,11 @@ namespace GitHub.Runner.Worker
             string result = "";
             if (token != null)
             {
-                var context = CreateContext(executionContext);
+                var templateContext = CreateTemplateContext(executionContext);
                 try
                 {
-                    var evaluateResult = TemplateEvaluator.Evaluate(context, "input-default-context", token, 0, null, omitHeader: true);
+                    var evaluateResult = TemplateEvaluator.Evaluate(templateContext, "input-default-context", token, 0, null, omitHeader: true);
-                    context.Errors.Check();
+                    templateContext.Errors.Check();
 
                     Trace.Info($"Input '{inputName}': default value evaluate result: {StringUtil.ConvertToJson(evaluateResult)}");
 
@@ -235,16 +295,16 @@ namespace GitHub.Runner.Worker
                 catch (Exception ex) when (!(ex is TemplateValidationException))
                 {
                     Trace.Error(ex);
-                    context.Errors.Add(ex);
+                    templateContext.Errors.Add(ex);
                 }
 
-                context.Errors.Check();
+                templateContext.Errors.Check();
             }
 
             return result;
         }
 
-        private TemplateContext CreateContext(
+        private TemplateContext CreateTemplateContext(
             IExecutionContext executionContext,
             IDictionary<string, PipelineContextData> extraExpressionValues = null)
         {
@@ -281,21 +341,21 @@ namespace GitHub.Runner.Worker
                 result.ExpressionFunctions.Add(item);
             }
 
-            // Add the file table
+            // Add the file table from the Execution Context
-            if (_fileTable?.Count > 0)
+            for (var i = 0; i < executionContext.Global.FileTable.Count; i++)
             {
-                for (var i = 0 ; i < _fileTable.Count ; i++)
+                result.GetFileId(executionContext.Global.FileTable[i]);
-                {
-                    result.GetFileId(_fileTable[i]);
-                }
             }
 
             return result;
         }
 
         private ActionExecutionData ConvertRuns(
-            TemplateContext context,
+            IExecutionContext executionContext,
-            TemplateToken inputsToken)
+            TemplateContext templateContext,
+            TemplateToken inputsToken,
+            String fileRelativePath,
+            MappingToken outputs = null)
         {
             var runsMapping = inputsToken.AssertMapping("runs");
             var usingToken = default(StringToken);
@@ -311,6 +371,8 @@ namespace GitHub.Runner.Worker
             var postToken = default(StringToken);
             var postEntrypointToken = default(StringToken);
             var postIfToken = default(StringToken);
+            var steps = default(List<Pipelines.Step>);
+
             foreach (var run in runsMapping)
             {
                 var runsKey = run.Key.AssertString("runs key").Value;
@@ -355,6 +417,11 @@ namespace GitHub.Runner.Worker
                     case "pre-if":
                         preIfToken = run.Value.AssertString("pre-if");
                         break;
+                    case "steps":
+                        var stepsToken = run.Value.AssertSequence("steps");
+                        steps = PipelineTemplateConverter.ConvertToSteps(templateContext, stepsToken);
+                        templateContext.Errors.Check();
+                        break;
                     default:
                         Trace.Info($"Ignore run property {runsKey}.");
                         break;
@@ -367,7 +434,7 @@ namespace GitHub.Runner.Worker
                 {
                     if (string.IsNullOrEmpty(imageToken?.Value))
                     {
-                        throw new ArgumentNullException($"Image is not provided.");
+                        throw new ArgumentNullException($"You are using a Container Action but an image is not provided in {fileRelativePath}.");
                     }
                     else
                     {
@@ -388,7 +455,7 @@ namespace GitHub.Runner.Worker
                 {
                     if (string.IsNullOrEmpty(mainToken?.Value))
                     {
-                        throw new ArgumentNullException($"Entry javascript file is not provided.");
+                        throw new ArgumentNullException($"You are using a JavaScript Action but there is not an entry JavaScript file provided in {fileRelativePath}.");
                     }
                     else
                     {
@@ -402,6 +469,21 @@ namespace GitHub.Runner.Worker
                         };
                     }
                 }
+                else if (string.Equals(usingToken.Value, "composite", StringComparison.OrdinalIgnoreCase))
+                {
+                    if (steps == null)
+                    {
+                        throw new ArgumentNullException($"You are using a composite action but there are no steps provided in {fileRelativePath}.");
+                    }
+                    else
+                    {
+                        return new CompositeActionExecutionData()
+                        {
+                            Steps = steps.Cast<Pipelines.ActionStep>().ToList(),
+                            Outputs = outputs
+                        };
+                    }
+                }
                 else
                 {
                     throw new ArgumentOutOfRangeException($"'using: {usingToken.Value}' is not supported, use 'docker' or 'node12' instead.");
@@ -419,7 +501,6 @@ namespace GitHub.Runner.Worker
         }
 
         private void ConvertInputs(
-            TemplateContext context,
             TemplateToken inputsToken,
             ActionDefinitionData actionDefinition)
         {

src/Runner.Worker/ActionRunner.cs

@@ -94,6 +94,13 @@ namespace GitHub.Runner.Worker
             if (handlerData.HasPost && (Stage == ActionRunStage.Pre || Stage == ActionRunStage.Main))
             {
                 string postDisplayName = $"Post {this.DisplayName}";
+                if (Stage == ActionRunStage.Pre &&
+                    this.DisplayName.StartsWith("Pre ", StringComparison.OrdinalIgnoreCase))
+                {
+                    // Trim the leading `Pre ` from the display name.
+                    // Otherwise, we will get `Post Pre xxx` as DisplayName for the Post step.
+                    postDisplayName = $"Post {this.DisplayName.Substring("Pre ".Length)}";
+                }
                 var repositoryReference = Action.Reference as RepositoryPathReference;
                 var pathString = string.IsNullOrEmpty(repositoryReference.Path) ? string.Empty : $"/{repositoryReference.Path}";
                 var repoString = string.IsNullOrEmpty(repositoryReference.Ref) ? $"{repositoryReference.Name}{pathString}" :
@@ -128,16 +135,33 @@ namespace GitHub.Runner.Worker
                 ExecutionContext.SetGitHubContext("event_path", workflowFile);
             }
 
+            // Set GITHUB_ACTION_REPOSITORY if this Action is from a repository
+            if (Action.Reference is Pipelines.RepositoryPathReference repoPathReferenceAction &&
+                !string.Equals(repoPathReferenceAction.RepositoryType, Pipelines.PipelineConstants.SelfAlias, StringComparison.OrdinalIgnoreCase))
+            {
+                ExecutionContext.SetGitHubContext("action_repository", repoPathReferenceAction.Name);
+                ExecutionContext.SetGitHubContext("action_ref", repoPathReferenceAction.Ref);
+            }
+            else
+            {
+                ExecutionContext.SetGitHubContext("action_repository", null);
+                ExecutionContext.SetGitHubContext("action_ref", null);
+            }
+
             // Setup container stephost for running inside the container.
-            if (ExecutionContext.Container != null)
+            if (ExecutionContext.Global.Container != null)
             {
                 // Make sure required container is already created.
-                ArgUtil.NotNullOrEmpty(ExecutionContext.Container.ContainerId, nameof(ExecutionContext.Container.ContainerId));
+                ArgUtil.NotNullOrEmpty(ExecutionContext.Global.Container.ContainerId, nameof(ExecutionContext.Global.Container.ContainerId));
                 var containerStepHost = HostContext.CreateService<IContainerStepHost>();
-                containerStepHost.Container = ExecutionContext.Container;
+                containerStepHost.Container = ExecutionContext.Global.Container;
                 stepHost = containerStepHost;
             }
 
+            // Setup File Command Manager
+            var fileCommandManager = HostContext.CreateService<IFileCommandManager>();
+            fileCommandManager.InitializeFiles(ExecutionContext, null);
+
             // Load the inputs.
             ExecutionContext.Debug("Loading inputs");
             var templateEvaluator = ExecutionContext.ToPipelineTemplateEvaluator();
@@ -155,6 +179,13 @@ namespace GitHub.Runner.Worker
             }
 
             var validInputs = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+            if (handlerData.ExecutionType == ActionExecutionType.Container)
+            {
+                // container action always accept 'entryPoint' and 'args' as inputs
+                // https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idstepswithargs
+                validInputs.Add("entryPoint");
+                validInputs.Add("args");
+            }
             // Merge the default inputs from the definition
             if (definition.Data?.Inputs != null)
             {
@@ -170,11 +201,21 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            foreach (var input in userInputs)
+            // Validate inputs only for actions with action.yml
+            if (Action.Reference.Type == Pipelines.ActionSourceType.Repository)
             {
-                if (!validInputs.Contains(input))
+                var unexpectedInputs = new List<string>();
+                foreach (var input in userInputs)
                 {
-                    ExecutionContext.Warning($"Unexpected input '{input}', valid inputs are ['{string.Join("', '", validInputs)}']");
+                    if (!validInputs.Contains(input))
+                    {
+                        unexpectedInputs.Add(input);
+                    }
+                }
+
+                if (unexpectedInputs.Count > 0)
+                {
+                    ExecutionContext.Warning($"Unexpected input(s) '{string.Join("', '", unexpectedInputs)}', valid inputs are ['{string.Join("', '", validInputs)}']");
                 }
             }
 
@@ -207,14 +248,22 @@ namespace GitHub.Runner.Worker
                             handlerData,
                             inputs,
                             environment,
-                            ExecutionContext.Variables,
+                            ExecutionContext.Global.Variables,
                             actionDirectory: definition.Directory);
 
             // Print out action details
             handler.PrintActionDetails(Stage);
 
             // Run the task.
-            await handler.RunAsync(Stage);
+            try
+            {
+                await handler.RunAsync(Stage);
+            }
+            finally
+            {
+                fileCommandManager.ProcessFiles(ExecutionContext, ExecutionContext.Global.Container);
+            }
+
         }
 
         public bool TryEvaluateDisplayName(DictionaryContextData contextData, IExecutionContext context)

src/Runner.Worker/Container/ContainerInfo.cs

@@ -21,6 +21,11 @@ namespace GitHub.Runner.Worker.Container
         {
         }
 
+        public ContainerInfo(IHostContext hostContext)
+        {
+            UpdateWebProxyEnv(hostContext.WebProxy);
+        }
+
         public ContainerInfo(IHostContext hostContext, Pipelines.JobContainer container, bool isJobContainer = true, string networkAlias = null)
         {
             this.ContainerName = container.Alias;
@@ -34,6 +39,9 @@ namespace GitHub.Runner.Worker.Container
             _environmentVariables = container.Environment;
             this.IsJobContainer = isJobContainer;
             this.ContainerNetworkAlias = networkAlias;
+            this.RegistryAuthUsername = container.Credentials?.Username;
+            this.RegistryAuthPassword = container.Credentials?.Password;
+            this.RegistryServer = DockerUtil.ParseRegistryHostnameFromImageName(this.ContainerImage);
 
 #if OS_WINDOWS
             _pathMappings.Add(new PathMapping(hostContext.GetDirectory(WellKnownDirectory.Work), "C:\\__w"));
@@ -79,6 +87,9 @@ namespace GitHub.Runner.Worker.Container
         public string ContainerWorkDirectory { get; set; }
         public string ContainerCreateOptions { get; private set; }
         public string ContainerRuntimePath { get; set; }
+        public string RegistryServer { get; set; }
+        public string RegistryAuthUsername { get; set; }
+        public string RegistryAuthPassword { get; set; }
         public bool IsJobContainer { get; set; }
 
         public IDictionary<string, string> ContainerEnvironmentVariables

src/Runner.Worker/Container/DockerCommandManager.cs

@@ -4,6 +4,7 @@ using System.IO;
 using System.Linq;
 using System.Text.RegularExpressions;
 using System.Threading;
+using System.Threading.Channels;
 using System.Threading.Tasks;
 using GitHub.Runner.Common;
 using GitHub.Runner.Sdk;
@@ -17,6 +18,7 @@ namespace GitHub.Runner.Worker.Container
         string DockerInstanceLabel { get; }
         Task<DockerVersion> DockerVersion(IExecutionContext context);
         Task<int> DockerPull(IExecutionContext context, string image);
+        Task<int> DockerPull(IExecutionContext context, string image, string configFileDirectory);
         Task<int> DockerBuild(IExecutionContext context, string workingDirectory, string dockerFile, string dockerContext, string tag);
         Task<string> DockerCreate(IExecutionContext context, ContainerInfo container);
         Task<int> DockerRun(IExecutionContext context, ContainerInfo container, EventHandler<ProcessDataReceivedEventArgs> stdoutDataReceived, EventHandler<ProcessDataReceivedEventArgs> stderrDataReceived);
@@ -31,6 +33,7 @@ namespace GitHub.Runner.Worker.Container
         Task<int> DockerExec(IExecutionContext context, string containerId, string options, string command, List<string> outputs);
         Task<List<string>> DockerInspect(IExecutionContext context, string dockerObject, string options);
         Task<List<PortMapping>> DockerPort(IExecutionContext context, string containerId);
+        Task<int> DockerLogin(IExecutionContext context, string configFileDirectory, string registry, string username, string password);
     }
 
     public class DockerCommandManager : RunnerService, IDockerCommandManager
@@ -82,9 +85,18 @@ namespace GitHub.Runner.Worker.Container
             return new DockerVersion(serverVersion, clientVersion);
         }
 
-        public async Task<int> DockerPull(IExecutionContext context, string image)
+        public Task<int> DockerPull(IExecutionContext context, string image)
         {
-            return await ExecuteDockerCommandAsync(context, "pull", image, context.CancellationToken);
+            return DockerPull(context, image, null);
+        }
+
+        public async Task<int> DockerPull(IExecutionContext context, string image, string configFileDirectory)
+        {
+            if (string.IsNullOrEmpty(configFileDirectory))
+            {
+                return await ExecuteDockerCommandAsync(context, $"pull", image, context.CancellationToken);
+            }
+            return await ExecuteDockerCommandAsync(context, $"--config {configFileDirectory} pull", image, context.CancellationToken);
         }
 
         public async Task<int> DockerBuild(IExecutionContext context, string workingDirectory, string dockerFile, string dockerContext, string tag)
@@ -346,6 +358,28 @@ namespace GitHub.Runner.Worker.Container
             return DockerUtil.ParseDockerPort(portMappingLines);
         }
 
+        public Task<int> DockerLogin(IExecutionContext context, string configFileDirectory, string registry, string username, string password)
+        {
+            string args = $"--config {configFileDirectory} login {registry} -u {username} --password-stdin";
+            context.Command($"{DockerPath} {args}");
+
+            var input = Channel.CreateBounded<string>(new BoundedChannelOptions(1) { SingleReader = true, SingleWriter = true });
+            input.Writer.TryWrite(password);
+
+            var processInvoker = HostContext.CreateService<IProcessInvoker>();
+
+            return processInvoker.ExecuteAsync(
+                workingDirectory: context.GetGitHubContext("workspace"),
+                fileName: DockerPath,
+                arguments: args,
+                environment: null,
+                requireExitCodeZero: false,
+                outputEncoding: null,
+                killProcessOnCancel: false,
+                redirectStandardIn: input,
+                cancellationToken: context.CancellationToken);
+        }
+
         private Task<int> ExecuteDockerCommandAsync(IExecutionContext context, string command, string options, CancellationToken cancellationToken = default(CancellationToken))
         {
             return ExecuteDockerCommandAsync(context, command, options, null, cancellationToken);

src/Runner.Worker/Container/DockerUtil.cs

@@ -45,5 +45,21 @@ namespace GitHub.Runner.Worker.Container
             }
             return "";
         }
+
+        public static string ParseRegistryHostnameFromImageName(string name)
+        {
+            var nameSplit = name.Split('/');
+            // Single slash is implictly from Dockerhub, unless first part has .tld or :port
+            if (nameSplit.Length == 2 && (nameSplit[0].Contains(":") || nameSplit[0].Contains(".")))
+            {
+                return nameSplit[0];
+            }
+            // All other non Dockerhub registries
+            else if (nameSplit.Length > 2)
+            {
+                return nameSplit[0];
+            }
+            return "";
+        }
     }
 }

src/Runner.Worker/ContainerOperationProvider.cs

@@ -91,7 +91,10 @@ namespace GitHub.Runner.Worker
 #endif
 
             // Check docker client/server version
+            executionContext.Output("##[group]Checking docker version");
             DockerVersion dockerVersion = await _dockerManger.DockerVersion(executionContext);
+            executionContext.Output("##[endgroup]");
+
             ArgUtil.NotNull(dockerVersion.ServerVersion, nameof(dockerVersion.ServerVersion));
             ArgUtil.NotNull(dockerVersion.ClientVersion, nameof(dockerVersion.ClientVersion));
 
@@ -111,7 +114,7 @@ namespace GitHub.Runner.Worker
             }
 
             // Clean up containers left by previous runs
-            executionContext.Debug($"Delete stale containers from previous jobs");
+            executionContext.Output("##[group]Clean up resources from previous jobs");
             var staleContainers = await _dockerManger.DockerPS(executionContext, $"--all --quiet --no-trunc --filter \"label={_dockerManger.DockerInstanceLabel}\"");
             foreach (var staleContainer in staleContainers)
             {
@@ -122,18 +125,20 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            executionContext.Debug($"Delete stale container networks from previous jobs");
             int networkPruneExitCode = await _dockerManger.DockerNetworkPrune(executionContext);
             if (networkPruneExitCode != 0)
             {
                 executionContext.Warning($"Delete stale container networks failed, docker network prune fail with exit code {networkPruneExitCode}");
             }
+            executionContext.Output("##[endgroup]");
 
             // Create local docker network for this job to avoid port conflict when multiple runners run on same machine.
             // All containers within a job join the same network
+            executionContext.Output("##[group]Create local container network");
             var containerNetwork = $"github_network_{Guid.NewGuid().ToString("N")}";
             await CreateContainerNetworkAsync(executionContext, containerNetwork);
             executionContext.JobContext.Container["network"] = new StringContextData(containerNetwork);
+            executionContext.Output("##[endgroup]");
 
             foreach (var container in containers)
             {
@@ -141,10 +146,12 @@ namespace GitHub.Runner.Worker
                 await StartContainerAsync(executionContext, container);
             }
 
+            executionContext.Output("##[group]Waiting for all services to be ready");
             foreach (var container in containers.Where(c => !c.IsJobContainer))
             {
                 await ContainerHealthcheck(executionContext, container);
             }
+            executionContext.Output("##[endgroup]");
         }
 
         public async Task StopContainersAsync(IExecutionContext executionContext, object data)
@@ -173,6 +180,10 @@ namespace GitHub.Runner.Worker
             Trace.Info($"Container name: {container.ContainerName}");
             Trace.Info($"Container image: {container.ContainerImage}");
             Trace.Info($"Container options: {container.ContainerCreateOptions}");
+
+            var groupName = container.IsJobContainer ? "Starting job container" : $"Starting {container.ContainerNetworkAlias} service container";
+            executionContext.Output($"##[group]{groupName}");
+
             foreach (var port in container.UserPortMappings)
             {
                 Trace.Info($"User provided port: {port.Value}");
@@ -187,12 +198,18 @@ namespace GitHub.Runner.Worker
                 }
             }
 
+            // TODO: Add at a later date. This currently no local package registry to test with
+            // UpdateRegistryAuthForGitHubToken(executionContext, container);
+
+            // Before pulling, generate client authentication if required
+            var configLocation = await ContainerRegistryLogin(executionContext, container);
+
             // Pull down docker image with retry up to 3 times
             int retryCount = 0;
             int pullExitCode = 0;
             while (retryCount < 3)
             {
-                pullExitCode = await _dockerManger.DockerPull(executionContext, container.ContainerImage);
+                pullExitCode = await _dockerManger.DockerPull(executionContext, container.ContainerImage, configLocation);
                 if (pullExitCode == 0)
                 {
                     break;
@@ -209,6 +226,9 @@ namespace GitHub.Runner.Worker
                 }
             }
 
+            // Remove credentials after pulling
+            ContainerRegistryLogout(configLocation);
+
             if (retryCount == 3 && pullExitCode != 0)
             {
                 throw new InvalidOperationException($"Docker pull failed with exit code {pullExitCode}");
@@ -304,6 +324,7 @@ namespace GitHub.Runner.Worker
                 container.ContainerRuntimePath = DockerUtil.ParsePathFromConfigEnv(containerEnv);
                 executionContext.JobContext.Container["id"] = new StringContextData(container.ContainerId);
             }
+            executionContext.Output("##[endgroup]");
         }
 
         private async Task StopContainerAsync(IExecutionContext executionContext, ContainerInfo container)
@@ -425,5 +446,83 @@ namespace GitHub.Runner.Worker
                 throw new InvalidOperationException($"Failed to initialize, {container.ContainerNetworkAlias} service is {serviceHealth}.");
             }
         }
+
+        private async Task<string> ContainerRegistryLogin(IExecutionContext executionContext, ContainerInfo container)
+        {
+            if (string.IsNullOrEmpty(container.RegistryAuthUsername) || string.IsNullOrEmpty(container.RegistryAuthPassword))
+            {
+                // No valid client config can be generated
+                return "";
+            }
+            var configLocation = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Temp), $".docker_{Guid.NewGuid()}");
+            try
+            {
+                var dirInfo = Directory.CreateDirectory(configLocation);
+            }
+            catch (Exception e)
+            {
+                throw new InvalidOperationException($"Failed to create directory to store registry client credentials: {e.Message}");
+            }
+            var loginExitCode = await _dockerManger.DockerLogin(
+                executionContext,
+                configLocation,
+                container.RegistryServer,
+                container.RegistryAuthUsername,
+                container.RegistryAuthPassword);
+
+            if (loginExitCode != 0)
+            {
+                throw new InvalidOperationException($"Docker login for '{container.RegistryServer}' failed with exit code {loginExitCode}");
+            }
+            return configLocation;
+        }
+
+        private void ContainerRegistryLogout(string configLocation)
+        {
+            try
+            {
+                if (!string.IsNullOrEmpty(configLocation) && Directory.Exists(configLocation))
+                {
+                    Directory.Delete(configLocation, recursive: true);
+                }
+            }
+            catch (Exception e)
+            {
+                throw new InvalidOperationException($"Failed to remove directory containing Docker client credentials: {e.Message}");
+            }
+        }
+
+        private void UpdateRegistryAuthForGitHubToken(IExecutionContext executionContext, ContainerInfo container)
+        {
+            var registryIsTokenCompatible = container.RegistryServer.Equals("docker.pkg.github.com", StringComparison.OrdinalIgnoreCase);
+            if (!registryIsTokenCompatible)
+            {
+                return;
+            }
+
+            var registryMatchesWorkflow = false;
+
+            // REGISTRY/OWNER/REPO/IMAGE[:TAG]
+            var imageParts = container.ContainerImage.Split('/');
+            if (imageParts.Length != 4)
+            {
+                executionContext.Warning($"Could not identify owner and repo for container image {container.ContainerImage}. Skipping automatic token auth");
+                return;
+            }
+            var owner = imageParts[1];
+            var repo = imageParts[2];
+            var nwo = $"{owner}/{repo}";
+            if (nwo.Equals(executionContext.GetGitHubContext("repository"), StringComparison.OrdinalIgnoreCase))
+            {
+                registryMatchesWorkflow = true;
+            }
+
+            var registryCredentialsNotSupplied = string.IsNullOrEmpty(container.RegistryAuthUsername) && string.IsNullOrEmpty(container.RegistryAuthPassword);
+            if (registryCredentialsNotSupplied && registryMatchesWorkflow)
+            {
+                container.RegistryAuthUsername = executionContext.GetGitHubContext("actor");
+                container.RegistryAuthPassword = executionContext.GetGitHubContext("token");
+            }
+        }
     }
 }

src/Runner.Worker/DiagnosticLogManager.cs

@@ -86,9 +86,9 @@ namespace GitHub.Runner.Worker
 
             executionContext.Debug("Zipping diagnostic files.");
 
-            string buildNumber = executionContext.Variables.Build_Number ?? "UnknownBuildNumber";
+            string buildNumber = executionContext.Global.Variables.Build_Number ?? "UnknownBuildNumber";
             string buildName = $"Build {buildNumber}";
-            string phaseName = executionContext.Variables.System_PhaseDisplayName ?? "UnknownPhaseName";
+            string phaseName = executionContext.Global.Variables.System_PhaseDisplayName ?? "UnknownPhaseName";
 
             // zip the files
             string diagnosticsZipFileName = $"{buildName}-{phaseName}.zip";

src/Runner.Worker/ExecutionContext.cs

@@ -6,6 +6,7 @@ using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Text;
+using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Web;
@@ -43,22 +44,13 @@ namespace GitHub.Runner.Worker
         string ResultCode { get; set; }
         TaskResult? CommandResult { get; set; }
         CancellationToken CancellationToken { get; }
-        List<ServiceEndpoint> Endpoints { get; }
+        GlobalContext Global { get; }
 
-        PlanFeatures Features { get; }
-        Variables Variables { get; }
         Dictionary<string, string> IntraActionState { get; }
-        IDictionary<String, IDictionary<String, String>> JobDefaults { get; }
         Dictionary<string, VariableValue> JobOutputs { get; }
-        IDictionary<String, String> EnvironmentVariables { get; }
+        ActionsEnvironmentReference ActionsEnvironment { get; }
-        IDictionary<String, ContextScope> Scopes { get; }
-        IList<String> FileTable { get; }
-        StepsContext StepsContext { get; }
         DictionaryContextData ExpressionValues { get; }
         IList<IFunctionInfo> ExpressionFunctions { get; }
-        List<string> PrependPath { get; }
-        ContainerInfo Container { get; set; }
-        List<ContainerInfo> ServiceContainers { get; }
         JobContext JobContext { get; }
 
         // Only job level ExecutionContext has JobSteps
@@ -69,13 +61,16 @@ namespace GitHub.Runner.Worker
 
         bool EchoOnActionCommand { get; set; }
 
+        bool InsideComposite { get; }
+
+        ExecutionContext Root { get; }
+
         // Initialize
         void InitializeJob(Pipelines.AgentJobRequestMessage message, CancellationToken token);
         void CancelToken();
-        IExecutionContext CreateChild(Guid recordId, string displayName, string refName, string scopeName, string contextName, Dictionary<string, string> intraActionState = null, int? recordOrder = null);
+        IExecutionContext CreateChild(Guid recordId, string displayName, string refName, string scopeName, string contextName, Dictionary<string, string> intraActionState = null, int? recordOrder = null, IPagingLogger logger = null, bool insideComposite = false, CancellationTokenSource cancellationTokenSource = null);
 
         // logging
-        bool WriteDebug { get; }
         long Write(string tag, string message);
         void QueueAttachFile(string type, string name, string filePath);
 
@@ -104,11 +99,13 @@ namespace GitHub.Runner.Worker
         // others
         void ForceTaskComplete();
         void RegisterPostJobStep(IStep step);
+        IStep CreateCompositeStep(string scopeName, IActionRunner step, DictionaryContextData inputsData, Dictionary<string, string> envData);
     }
 
     public sealed class ExecutionContext : RunnerService, IExecutionContext
     {
         private const int _maxIssueCount = 10;
+        private const int _throttlingDelayReportThreshold = 10 * 1000; // Don't report throttling with less than 10 seconds delay
 
         private readonly TimelineRecord _record = new TimelineRecord();
         private readonly Dictionary<Guid, TimelineRecord> _detailRecords = new Dictionary<Guid, TimelineRecord>();
@@ -139,21 +136,15 @@ namespace GitHub.Runner.Worker
         public string ContextName { get; private set; }
         public Task ForceCompleted => _forceCompleted.Task;
         public CancellationToken CancellationToken => _cancellationTokenSource.Token;
-        public List<ServiceEndpoint> Endpoints { get; private set; }
-        public Variables Variables { get; private set; }
         public Dictionary<string, string> IntraActionState { get; private set; }
-        public IDictionary<String, IDictionary<String, String>> JobDefaults { get; private set; }
         public Dictionary<string, VariableValue> JobOutputs { get; private set; }
-        public IDictionary<String, String> EnvironmentVariables { get; private set; }
+
-        public IDictionary<String, ContextScope> Scopes { get; private set; }
+        public ActionsEnvironmentReference ActionsEnvironment { get; private set; }
-        public IList<String> FileTable { get; private set; }
-        public StepsContext StepsContext { get; private set; }
         public DictionaryContextData ExpressionValues { get; } = new DictionaryContextData();
         public IList<IFunctionInfo> ExpressionFunctions { get; } = new List<IFunctionInfo>();
-        public bool WriteDebug { get; private set; }
+
-        public List<string> PrependPath { get; private set; }
+        // Shared pointer across job-level execution context and step-level execution contexts
-        public ContainerInfo Container { get; set; }
+        public GlobalContext Global { get; private set; }
-        public List<ContainerInfo> ServiceContainers { get; private set; }
 
         // Only job level ExecutionContext has JobSteps
         public Queue<IStep> JobSteps { get; private set; }
@@ -166,6 +157,7 @@ namespace GitHub.Runner.Worker
 
         public bool EchoOnActionCommand { get; set; }
 
+        public bool InsideComposite { get; private set; }
 
         public TaskResult? Result
         {
@@ -197,9 +189,7 @@ namespace GitHub.Runner.Worker
             }
         }
 
-        public PlanFeatures Features { get; private set; }
+        public ExecutionContext Root
-
-        private ExecutionContext Root
         {
             get
             {
@@ -263,17 +253,44 @@ namespace GitHub.Runner.Worker
             Root.PostJobSteps.Push(step);
         }
 
-        public IExecutionContext CreateChild(Guid recordId, string displayName, string refName, string scopeName, string contextName, Dictionary<string, string> intraActionState = null, int? recordOrder = null)
+        /// <summary>
+        /// Helper function used in CompositeActionHandler::RunAsync to
+        /// add a child node, aka a step, to the current job to the Root.JobSteps based on the location.
+        /// </summary>
+        public IStep CreateCompositeStep(
+            string scopeName,
+            IActionRunner step,
+            DictionaryContextData inputsData,
+            Dictionary<string, string> envData)
+        {
+            step.ExecutionContext = Root.CreateChild(_record.Id, _record.Name, _record.Id.ToString("N"), scopeName, step.Action.ContextName, logger: _logger, insideComposite: true, cancellationTokenSource: CancellationTokenSource.CreateLinkedTokenSource(_cancellationTokenSource.Token));
+            step.ExecutionContext.ExpressionValues["inputs"] = inputsData;
+            step.ExecutionContext.ExpressionValues["steps"] = Global.StepsContext.GetScope(step.ExecutionContext.GetFullyQualifiedContextName());
+
+            // Add the composite action environment variables to each step.
+#if OS_WINDOWS
+            var envContext = new DictionaryContextData();
+#else
+            var envContext = new CaseSensitiveDictionaryContextData();
+#endif
+            foreach (var pair in envData)
+            {
+                envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
+            }
+            step.ExecutionContext.ExpressionValues["env"] = envContext;
+
+            return step;
+        }
+
+        public IExecutionContext CreateChild(Guid recordId, string displayName, string refName, string scopeName, string contextName, Dictionary<string, string> intraActionState = null, int? recordOrder = null, IPagingLogger logger = null, bool insideComposite = false, CancellationTokenSource cancellationTokenSource = null)
         {
             Trace.Entering();
 
             var child = new ExecutionContext();
             child.Initialize(HostContext);
+            child.Global = Global;
             child.ScopeName = scopeName;
             child.ContextName = contextName;
-            child.Features = Features;
-            child.Variables = Variables;
-            child.Endpoints = Endpoints;
             if (intraActionState == null)
             {
                 child.IntraActionState = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
@@ -282,11 +299,6 @@ namespace GitHub.Runner.Worker
             {
                 child.IntraActionState = intraActionState;
             }
-            child.EnvironmentVariables = EnvironmentVariables;
-            child.JobDefaults = JobDefaults;
-            child.Scopes = Scopes;
-            child.FileTable = FileTable;
-            child.StepsContext = StepsContext;
             foreach (var pair in ExpressionValues)
             {
                 child.ExpressionValues[pair.Key] = pair.Value;
@@ -295,12 +307,8 @@ namespace GitHub.Runner.Worker
             {
                 child.ExpressionFunctions.Add(item);
             }
-            child._cancellationTokenSource = new CancellationTokenSource();
+            child._cancellationTokenSource = cancellationTokenSource ?? new CancellationTokenSource();
-            child.WriteDebug = WriteDebug;
             child._parentExecutionContext = this;
-            child.PrependPath = PrependPath;
-            child.Container = Container;
-            child.ServiceContainers = ServiceContainers;
             child.EchoOnActionCommand = EchoOnActionCommand;
 
             if (recordOrder != null)
@@ -311,9 +319,17 @@ namespace GitHub.Runner.Worker
             {
                 child.InitializeTimelineRecord(_mainTimelineId, recordId, _record.Id, ExecutionContextType.Task, displayName, refName, ++_childTimelineRecordOrder);
             }
+            if (logger != null)
+            {
+                child._logger = logger;
+            }
+            else
+            {
+                child._logger = HostContext.CreateService<IPagingLogger>();
+                child._logger.Setup(_mainTimelineId, recordId);
+            }
 
-            child._logger = HostContext.CreateService<IPagingLogger>();
+            child.InsideComposite = insideComposite;
-            child._logger.Setup(_mainTimelineId, recordId);
 
             return child;
         }
@@ -335,7 +351,7 @@ namespace GitHub.Runner.Worker
             }
 
             // report total delay caused by server throttling.
-            if (_totalThrottlingDelayInMilliseconds > 0)
+            if (_totalThrottlingDelayInMilliseconds > _throttlingDelayReportThreshold)
             {
                 this.Warning($"The job has experienced {TimeSpan.FromMilliseconds(_totalThrottlingDelayInMilliseconds).TotalSeconds} seconds total delay caused by server throttling.");
             }
@@ -363,14 +379,19 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            _cancellationTokenSource?.Dispose();
+            if (Root != this)
+            {
+                // only dispose TokenSource for step level ExecutionContext
+                _cancellationTokenSource?.Dispose();
+            }
 
             _logger.End();
 
-            if (!string.IsNullOrEmpty(ContextName))
+            // Skip if generated context name. Generated context names start with "__". After M271-ish the server will never send an empty context name.
+            if (!string.IsNullOrEmpty(ContextName) && !ContextName.StartsWith("__", StringComparison.Ordinal))
             {
-                StepsContext.SetOutcome(ScopeName, ContextName, (Outcome ?? Result ?? TaskResult.Succeeded).ToActionResult());
+                Global.StepsContext.SetOutcome(ScopeName, ContextName, (Outcome ?? Result ?? TaskResult.Succeeded).ToActionResult());
-                StepsContext.SetConclusion(ScopeName, ContextName, (Result ?? TaskResult.Succeeded).ToActionResult());
+                Global.StepsContext.SetConclusion(ScopeName, ContextName, (Result ?? TaskResult.Succeeded).ToActionResult());
             }
 
             return Result.Value;
@@ -429,7 +450,8 @@ namespace GitHub.Runner.Worker
         {
             ArgUtil.NotNullOrEmpty(name, nameof(name));
 
-            if (String.IsNullOrEmpty(ContextName))
+            // Skip if generated context name. Generated context names start with "__". After M271-ish the server will never send an empty context name.
+            if (string.IsNullOrEmpty(ContextName) || ContextName.StartsWith("__", StringComparison.Ordinal))
             {
                 reference = null;
                 return;
@@ -437,7 +459,7 @@ namespace GitHub.Runner.Worker
 
             // todo: restrict multiline?
 
-            StepsContext.SetOutput(ScopeName, ContextName, name, value, out reference);
+            Global.StepsContext.SetOutput(ScopeName, ContextName, name, value, out reference);
         }
 
         public void SetTimeout(TimeSpan? timeout)
@@ -571,42 +593,38 @@ namespace GitHub.Runner.Worker
 
             _cancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(token);
 
-            // Features
+            Global = new GlobalContext();
-            Features = PlanUtil.GetFeatures(message.Plan);
+
+            // Plan
+            Global.Plan = message.Plan;
+            Global.Features = PlanUtil.GetFeatures(message.Plan);
 
             // Endpoints
-            Endpoints = message.Resources.Endpoints;
+            Global.Endpoints = message.Resources.Endpoints;
 
             // Variables
-            Variables = new Variables(HostContext, message.Variables);
+            Global.Variables = new Variables(HostContext, message.Variables);
 
             // Environment variables shared across all actions
-            EnvironmentVariables = new Dictionary<string, string>(VarUtil.EnvironmentVariableKeyComparer);
+            Global.EnvironmentVariables = new Dictionary<string, string>(VarUtil.EnvironmentVariableKeyComparer);
 
             // Job defaults shared across all actions
-            JobDefaults = new Dictionary<string, IDictionary<string, string>>(StringComparer.OrdinalIgnoreCase);
+            Global.JobDefaults = new Dictionary<string, IDictionary<string, string>>(StringComparer.OrdinalIgnoreCase);
 
             // Job Outputs
             JobOutputs = new Dictionary<string, VariableValue>(StringComparer.OrdinalIgnoreCase);
 
+            // Actions environment
+            ActionsEnvironment = message.ActionsEnvironment;
+
             // Service container info
-            ServiceContainers = new List<ContainerInfo>();
+            Global.ServiceContainers = new List<ContainerInfo>();
 
             // Steps context (StepsRunner manages adding the scoped steps context)
-            StepsContext = new StepsContext();
+            Global.StepsContext = new StepsContext();
-
-            // Scopes
-            Scopes = new Dictionary<String, ContextScope>(StringComparer.OrdinalIgnoreCase);
-            if (message.Scopes?.Count > 0)
-            {
-                foreach (var scope in message.Scopes)
-                {
-                    Scopes[scope.Name] = scope;
-                }
-            }
 
             // File table
-            FileTable = new List<String>(message.FileTable ?? new string[0]);
+            Global.FileTable = new List<String>(message.FileTable ?? new string[0]);
 
             // Expression values
             if (message.ContextData?.Count > 0)
@@ -617,15 +635,15 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            ExpressionValues["secrets"] = Variables.ToSecretsContext();
+            ExpressionValues["secrets"] = Global.Variables.ToSecretsContext();
             ExpressionValues["runner"] = new RunnerContext();
             ExpressionValues["job"] = new JobContext();
 
             Trace.Info("Initialize GitHub context");
-            var githubAccessToken = new StringContextData(Variables.Get("system.github.token"));
+            var githubAccessToken = new StringContextData(Global.Variables.Get("system.github.token"));
             var base64EncodedToken = Convert.ToBase64String(Encoding.UTF8.GetBytes($"x-access-token:{githubAccessToken}"));
             HostContext.SecretMasker.AddValue(base64EncodedToken);
-            var githubJob = Variables.Get("system.github.job");
+            var githubJob = Global.Variables.Get("system.github.job");
             var githubContext = new GitHubContext();
             githubContext["token"] = githubAccessToken;
             if (!string.IsNullOrEmpty(githubJob))
@@ -648,7 +666,7 @@ namespace GitHub.Runner.Worker
 #endif
 
             // Prepend Path
-            PrependPath = new List<string>();
+            Global.PrependPath = new List<string>();
 
             // JobSteps for job ExecutionContext
             JobSteps = new Queue<IStep>();
@@ -674,10 +692,10 @@ namespace GitHub.Runner.Worker
             _logger.Setup(_mainTimelineId, _record.Id);
 
             // Initialize 'echo on action command success' property, default to false, unless Step_Debug is set
-            EchoOnActionCommand = Variables.Step_Debug ?? false;
+            EchoOnActionCommand = Global.Variables.Step_Debug ?? false;
 
             // Verbosity (from GitHub.Step_Debug).
-            WriteDebug = Variables.Step_Debug ?? false;
+            Global.WriteDebug = Global.Variables.Step_Debug ?? false;
 
             // Hook up JobServerQueueThrottling event, we will log warning on server tarpit.
             _jobServerQueue.JobServerQueueThrottling += JobServerQueueThrottling_EventReceived;
@@ -705,7 +723,7 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            _jobServerQueue.QueueWebConsoleLine(_record.Id, msg);
+            _jobServerQueue.QueueWebConsoleLine(_record.Id, msg, totalLines);
             return totalLines;
         }
 
@@ -851,7 +869,8 @@ namespace GitHub.Runner.Worker
         {
             Interlocked.Add(ref _totalThrottlingDelayInMilliseconds, Convert.ToInt64(data.Delay.TotalMilliseconds));
 
-            if (!_throttlingReported)
+            if (!_throttlingReported &&
+                _totalThrottlingDelayInMilliseconds > _throttlingDelayReportThreshold)
             {
                 this.Warning(string.Format("The job is currently being throttled by the server. You may experience delays in console line output, job status reporting, and action log uploads."));
 
@@ -877,6 +896,16 @@ namespace GitHub.Runner.Worker
     // Otherwise individual overloads would need to be implemented (depending on the unit test).
     public static class ExecutionContextExtension
     {
+        public static string GetFullyQualifiedContextName(this IExecutionContext context)
+        {
+            if (!string.IsNullOrEmpty(context.ScopeName))
+            {
+                return $"{context.ScopeName}.{context.ContextName}";
+            }
+
+            return context.ContextName;
+        }
+
         public static void Error(this IExecutionContext context, Exception ex)
         {
             context.Error(ex.Message);
@@ -889,6 +918,12 @@ namespace GitHub.Runner.Worker
             context.AddIssue(new Issue() { Type = IssueType.Error, Message = message });
         }
 
+        // Do not add a format string overload. See comment on ExecutionContext.Write().
+        public static void InfrastructureError(this IExecutionContext context, string message)
+        {
+            context.AddIssue(new Issue() { Type = IssueType.Error, Message = message, IsInfrastructureIssue = true});
+        }
+
         // Do not add a format string overload. See comment on ExecutionContext.Write().
         public static void Warning(this IExecutionContext context, string message)
         {
@@ -915,7 +950,7 @@ namespace GitHub.Runner.Worker
         // Do not add a format string overload. See comment on ExecutionContext.Write().
         public static void Debug(this IExecutionContext context, string message)
         {
-            if (context.WriteDebug)
+            if (context.Global.WriteDebug)
             {
                 var multilines = message?.Replace("\r\n", "\n")?.Split("\n");
                 if (multilines != null)
@@ -940,7 +975,7 @@ namespace GitHub.Runner.Worker
                 traceWriter = context.ToTemplateTraceWriter();
             }
             var schema = PipelineTemplateSchemaFactory.GetSchema();
-            return new PipelineTemplateEvaluator(traceWriter, schema, context.FileTable);
+            return new PipelineTemplateEvaluator(traceWriter, schema, context.Global.FileTable);
         }
 
         public static ObjectTemplating.ITraceWriter ToTemplateTraceWriter(this IExecutionContext context)

src/Runner.Worker/Expressions/HashFilesFunction.cs

@@ -12,6 +12,8 @@ namespace GitHub.Runner.Worker.Expressions
 {
     public sealed class HashFilesFunction : Function
     {
+        private const int _hashFileTimeoutSeconds = 120;
+
         protected sealed override Object EvaluateCore(
             EvaluationContext context,
             out ResultMemory resultMemory)
@@ -89,19 +91,29 @@ namespace GitHub.Runner.Worker.Expressions
             }
             env["patterns"] = string.Join(Environment.NewLine, patterns);
 
-            int exitCode = p.ExecuteAsync(workingDirectory: githubWorkspace,
+            using (var tokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(_hashFileTimeoutSeconds)))
-                                          fileName: node,
-                                          arguments: $"\"{hashFilesScript.Replace("\"", "\\\"")}\"",
-                                          environment: env,
-                                          requireExitCodeZero: false,
-                                          cancellationToken: new CancellationTokenSource(TimeSpan.FromSeconds(120)).Token).GetAwaiter().GetResult();
-
-            if (exitCode != 0)
             {
-                throw new InvalidOperationException($"hashFiles('{ExpressionUtility.StringEscape(string.Join(", ", patterns))}') failed. Fail to hash files under directory '{githubWorkspace}'");
+                try
-            }
+                {
+                    int exitCode = p.ExecuteAsync(workingDirectory: githubWorkspace,
+                                                  fileName: node,
+                                                  arguments: $"\"{hashFilesScript.Replace("\"", "\\\"")}\"",
+                                                  environment: env,
+                                                  requireExitCodeZero: false,
+                                                  cancellationToken: tokenSource.Token).GetAwaiter().GetResult();
 
-            return hashResult;
+                    if (exitCode != 0)
+                    {
+                        throw new InvalidOperationException($"hashFiles('{ExpressionUtility.StringEscape(string.Join(", ", patterns))}') failed. Fail to hash files under directory '{githubWorkspace}'");
+                    }
+                }
+                catch (OperationCanceledException) when (tokenSource.IsCancellationRequested)
+                {
+                    throw new TimeoutException($"hashFiles('{ExpressionUtility.StringEscape(string.Join(", ", patterns))}') couldn't finish within {_hashFileTimeoutSeconds} seconds.");
+                }
+
+                return hashResult;
+            }
         }
 
         private sealed class HashFilesTrace : ITraceWriter

src/Runner.Worker/FileCommandManager.cs

@@ -0,0 +1,262 @@
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Worker.Container;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+
+namespace GitHub.Runner.Worker
+{
+    [ServiceLocator(Default = typeof(FileCommandManager))]
+    public interface IFileCommandManager : IRunnerService
+    {
+        void InitializeFiles(IExecutionContext context, ContainerInfo container);
+        void ProcessFiles(IExecutionContext context, ContainerInfo container);
+    
+    }
+
+    public sealed class FileCommandManager : RunnerService, IFileCommandManager
+    {
+        private const string _folderName = "_runner_file_commands";
+        private List<IFileCommandExtension> _commandExtensions;
+        private string _fileSuffix = String.Empty;
+        private string _fileCommandDirectory;
+        private Tracing _trace;
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _trace = HostContext.GetTrace(nameof(FileCommandManager));
+
+            _fileCommandDirectory = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Temp), _folderName);
+            if (!Directory.Exists(_fileCommandDirectory))
+            {
+                Directory.CreateDirectory(_fileCommandDirectory);
+            }
+
+            var extensionManager = hostContext.GetService<IExtensionManager>();
+            _commandExtensions = extensionManager.GetExtensions<IFileCommandExtension>() ?? new List<IFileCommandExtension>();
+        }
+
+        public void InitializeFiles(IExecutionContext context, ContainerInfo container)
+        {
+            var oldSuffix = _fileSuffix;
+            _fileSuffix = Guid.NewGuid().ToString();
+            foreach (var fileCommand in _commandExtensions)
+            {
+                var oldPath = Path.Combine(_fileCommandDirectory, fileCommand.FilePrefix + oldSuffix);
+                if (oldSuffix != String.Empty && File.Exists(oldPath))
+                {
+                    TryDeleteFile(oldPath);
+                }
+
+                var newPath = Path.Combine(_fileCommandDirectory, fileCommand.FilePrefix + _fileSuffix);
+                TryDeleteFile(newPath);
+                File.Create(newPath).Dispose();
+
+                var pathToSet = container != null ? container.TranslateToContainerPath(newPath) : newPath; 
+                context.SetGitHubContext(fileCommand.ContextName, pathToSet);
+            }
+        }
+
+        public void ProcessFiles(IExecutionContext context, ContainerInfo container)
+        {
+            foreach (var fileCommand in _commandExtensions)
+            {
+                try 
+                {
+                    fileCommand.ProcessCommand(context, Path.Combine(_fileCommandDirectory, fileCommand.FilePrefix + _fileSuffix),container);
+                }
+                catch (Exception ex)
+                {
+                    context.Error($"Unable to process file command '{fileCommand.ContextName}' successfully.");
+                    context.Error(ex);
+                    context.CommandResult = TaskResult.Failed;
+                }
+            }
+        }
+
+        private bool TryDeleteFile(string path)
+        {
+            if (!File.Exists(path))
+            {
+                return true;
+            }
+            try
+            {
+                File.Delete(path);
+            }
+            catch (Exception e)
+            {
+                _trace.Warning($"Unable to delete file {path} for reason: {e.ToString()}");
+                return false;
+            }
+            return true;
+        }
+    }
+
+    public interface IFileCommandExtension : IExtension
+    {
+        string ContextName { get; }
+        string FilePrefix { get; }
+
+        void ProcessCommand(IExecutionContext context, string filePath, ContainerInfo container);
+    }
+
+    public sealed class AddPathFileCommand : RunnerService, IFileCommandExtension
+    {
+        public string ContextName => "path";
+        public string FilePrefix => "add_path_";
+
+        public Type ExtensionType => typeof(IFileCommandExtension);
+
+        public void ProcessCommand(IExecutionContext context, string filePath, ContainerInfo container)
+        {
+            if (File.Exists(filePath))
+            {
+                var lines = File.ReadAllLines(filePath, Encoding.UTF8);
+                foreach(var line in lines)
+                {
+                    if (line == string.Empty)
+                    {
+                        continue;
+                    }
+                    context.Global.PrependPath.RemoveAll(x => string.Equals(x, line, StringComparison.CurrentCulture));
+                    context.Global.PrependPath.Add(line);
+                }
+            }
+        }
+    }
+
+    public sealed class SetEnvFileCommand : RunnerService, IFileCommandExtension
+    {
+        public string ContextName => "env";
+        public string FilePrefix => "set_env_";
+
+        public Type ExtensionType => typeof(IFileCommandExtension);
+
+        public void ProcessCommand(IExecutionContext context, string filePath, ContainerInfo container)
+        {
+            try
+            {
+                var text = File.ReadAllText(filePath) ?? string.Empty;
+                var index = 0;
+                var line = ReadLine(text, ref index);
+                while (line != null)
+                {
+                    if (!string.IsNullOrEmpty(line))
+                    {
+                        var equalsIndex = line.IndexOf("=", StringComparison.Ordinal);
+                        var heredocIndex = line.IndexOf("<<", StringComparison.Ordinal);
+
+                        // Normal style NAME=VALUE
+                        if (equalsIndex >= 0 && (heredocIndex < 0 || equalsIndex < heredocIndex))
+                        {
+                            var split = line.Split(new[] { '=' }, 2, StringSplitOptions.None);
+                            if (string.IsNullOrEmpty(line))
+                            {
+                                throw new Exception($"Invalid environment variable format '{line}'. Environment variable name must not be empty");
+                            }
+                            SetEnvironmentVariable(context, split[0], split[1]);
+                        }
+                        // Heredoc style NAME<<EOF
+                        else if (heredocIndex >= 0 && (equalsIndex < 0 || heredocIndex < equalsIndex))
+                        {
+                            var split = line.Split(new[] { "<<" }, 2, StringSplitOptions.None);
+                            if (string.IsNullOrEmpty(split[0]) || string.IsNullOrEmpty(split[1]))
+                            {
+                                throw new Exception($"Invalid environment variable format '{line}'. Environment variable name must not be empty and delimiter must not be empty");
+                            }
+                            var name = split[0];
+                            var delimiter = split[1];
+                            var startIndex = index; // Start index of the value (inclusive)
+                            var endIndex = index;   // End index of the value (exclusive)
+                            var tempLine = ReadLine(text, ref index, out var newline);
+                            while (!string.Equals(tempLine, delimiter, StringComparison.Ordinal))
+                            {
+                                if (tempLine == null)
+                                {
+                                    throw new Exception($"Invalid environment variable value. Matching delimiter not found '{delimiter}'");
+                                }
+                                endIndex = index - newline.Length;
+                                tempLine = ReadLine(text, ref index, out newline);
+                            }
+
+                            var value = endIndex > startIndex ? text.Substring(startIndex, endIndex - startIndex) : string.Empty;
+                            SetEnvironmentVariable(context, name, value);
+                        }
+                        else
+                        {
+                            throw new Exception($"Invalid environment variable format '{line}'");
+                        }
+                    }
+
+                    line = ReadLine(text, ref index);
+                }
+            }
+            catch (DirectoryNotFoundException)
+            {
+                context.Debug($"Environment variables file does not exist '{filePath}'");
+            }
+            catch (FileNotFoundException)
+            {
+                context.Debug($"Environment variables file does not exist '{filePath}'");
+            }
+        }
+
+        private static void SetEnvironmentVariable(
+            IExecutionContext context,
+            string name,
+            string value)
+        {
+            context.Global.EnvironmentVariables[name] = value;
+            context.SetEnvContext(name, value);
+            context.Debug($"{name}='{value}'");
+        }
+
+        private static string ReadLine(
+            string text,
+            ref int index)
+        {
+            return ReadLine(text, ref index, out _);
+        }
+
+        private static string ReadLine(
+            string text,
+            ref int index,
+            out string newline)
+        {
+            if (index >= text.Length)
+            {
+                newline = null;
+                return null;
+            }
+
+            var originalIndex = index;
+            var lfIndex = text.IndexOf("\n", index, StringComparison.Ordinal);
+            if (lfIndex < 0)
+            {
+                index = text.Length;
+                newline = null;
+                return text.Substring(originalIndex);
+            }
+
+#if OS_WINDOWS
+            var crLFIndex = text.IndexOf("\r\n", index, StringComparison.Ordinal);
+            if (crLFIndex >= 0 && crLFIndex < lfIndex)
+            {
+                index = crLFIndex + 2; // Skip over CRLF
+                newline = "\r\n";
+                return text.Substring(originalIndex, crLFIndex - originalIndex);
+            }
+#endif
+
+            index = lfIndex + 1; // Skip over LF
+            newline = "\n";
+            return text.Substring(originalIndex, lfIndex - originalIndex);
+        }
+    }
+}

src/Runner.Worker/GitHubContext.cs

@@ -6,24 +6,30 @@ namespace GitHub.Runner.Worker
 {
     public sealed class GitHubContext : DictionaryContextData, IEnvironmentContextData
     {
-        private readonly HashSet<string> _contextEnvWhitelist = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        private readonly HashSet<string> _contextEnvAllowlist = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
         {
             "action",
+            "action_path",
+            "action_ref",
+            "action_repository",
             "actor",
             "api_url",
             "base_ref",
+            "env",
             "event_name",
             "event_path",
             "graphql_url",
             "head_ref",
             "job",
+            "path",
             "ref",
             "repository",
             "repository_owner",
+            "retention_days",
             "run_id",
             "run_number",
+            "server_url",
             "sha",
-            "url",
             "workflow",
             "workspace",
         };
@@ -32,11 +38,23 @@ namespace GitHub.Runner.Worker
         {
             foreach (var data in this)
             {
-                if (_contextEnvWhitelist.Contains(data.Key) && data.Value is StringContextData value)
+                if (_contextEnvAllowlist.Contains(data.Key) && data.Value is StringContextData value)
                 {
                     yield return new KeyValuePair<string, string>($"GITHUB_{data.Key.ToUpperInvariant()}", value);
                 }
             }
         }
+
+        public GitHubContext ShallowCopy()
+        {
+            var copy = new GitHubContext();
+
+            foreach (var pair in this)
+            {
+                copy[pair.Key] = pair.Value;
+            }
+
+            return copy;
+        }
     }
-}
+}

src/Runner.Worker/GlobalContext.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Common.Util;
+using GitHub.Runner.Worker.Container;
+
+namespace GitHub.Runner.Worker
+{
+    public sealed class GlobalContext
+    {
+        public ContainerInfo Container { get; set; }
+        public List<ServiceEndpoint> Endpoints { get; set; }
+        public IDictionary<String, String> EnvironmentVariables { get; set; }
+        public PlanFeatures Features { get; set; }
+        public IList<String> FileTable { get; set; }
+        public IDictionary<String, IDictionary<String, String>> JobDefaults { get; set; }
+        public TaskOrchestrationPlanReference Plan { get; set; }
+        public List<string> PrependPath { get; set; }
+        public List<ContainerInfo> ServiceContainers { get; set; }
+        public StepsContext StepsContext { get; set; }
+        public Variables Variables { get; set; }
+        public bool WriteDebug { get; set; }
+    }
+}

src/Runner.Worker/Handlers/CompositeActionHandler.cs

@@ -0,0 +1,282 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.DistributedTask.ObjectTemplating.Tokens;
+using GitHub.DistributedTask.Pipelines.ContextData;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Common;
+using GitHub.Runner.Sdk;
+using Pipelines = GitHub.DistributedTask.Pipelines;
+
+
+namespace GitHub.Runner.Worker.Handlers
+{
+    [ServiceLocator(Default = typeof(CompositeActionHandler))]
+    public interface ICompositeActionHandler : IHandler
+    {
+        CompositeActionExecutionData Data { get; set; }
+    }
+    public sealed class CompositeActionHandler : Handler, ICompositeActionHandler
+    {
+        public CompositeActionExecutionData Data { get; set; }
+
+        public async Task RunAsync(ActionRunStage stage)
+        {
+            // Validate args.
+            Trace.Entering();
+            ArgUtil.NotNull(ExecutionContext, nameof(ExecutionContext));
+            ArgUtil.NotNull(Inputs, nameof(Inputs));
+            ArgUtil.NotNull(Data.Steps, nameof(Data.Steps));
+
+            // Resolve action steps
+            var actionSteps = Data.Steps;
+
+            // Create Context Data to reuse for each composite action step
+            var inputsData = new DictionaryContextData();
+            foreach (var i in Inputs)
+            {
+                inputsData[i.Key] = new StringContextData(i.Value);
+            }
+
+            // Initialize Composite Steps List of Steps
+            var compositeSteps = new List<IStep>();
+
+            // Temporary hack until after M271-ish. After M271-ish the server will never send an empty
+            // context name. Generated context names start with "__"
+            var childScopeName = ExecutionContext.GetFullyQualifiedContextName();
+            if (string.IsNullOrEmpty(childScopeName))
+            {
+                childScopeName = $"__{Guid.NewGuid()}";
+            }
+
+            foreach (Pipelines.ActionStep actionStep in actionSteps)
+            {
+                var actionRunner = HostContext.CreateService<IActionRunner>();
+                actionRunner.Action = actionStep;
+                actionRunner.Stage = stage;
+                actionRunner.Condition = actionStep.Condition;
+
+                var step = ExecutionContext.CreateCompositeStep(childScopeName, actionRunner, inputsData, Environment);
+
+                // Shallow copy github context
+                var gitHubContext = step.ExecutionContext.ExpressionValues["github"] as GitHubContext;
+                ArgUtil.NotNull(gitHubContext, nameof(gitHubContext));
+                gitHubContext = gitHubContext.ShallowCopy();
+                step.ExecutionContext.ExpressionValues["github"] = gitHubContext;
+
+                // Set GITHUB_ACTION_PATH
+                step.ExecutionContext.SetGitHubContext("action_path", ActionDirectory);
+
+                compositeSteps.Add(step);
+            }
+
+            try
+            {
+                // This is where we run each step.
+                await RunStepsAsync(compositeSteps);
+
+                // Get the pointer of the correct "steps" object and pass it to the ExecutionContext so that we can process the outputs correctly
+                ExecutionContext.ExpressionValues["inputs"] = inputsData;
+                ExecutionContext.ExpressionValues["steps"] = ExecutionContext.Global.StepsContext.GetScope(ExecutionContext.GetFullyQualifiedContextName());
+
+                ProcessCompositeActionOutputs();
+
+                ExecutionContext.Global.StepsContext.ClearScope(childScopeName);
+            }
+            catch (Exception ex)
+            {
+                // Composite StepRunner should never throw exception out.
+                Trace.Error($"Caught exception from composite steps {nameof(CompositeActionHandler)}: {ex}");
+                ExecutionContext.Error(ex);
+                ExecutionContext.Result = TaskResult.Failed;
+            }
+        }
+
+        private void ProcessCompositeActionOutputs()
+        {
+            ArgUtil.NotNull(ExecutionContext, nameof(ExecutionContext));
+
+            // Evaluate the mapped outputs value
+            if (Data.Outputs != null)
+            {
+                // Evaluate the outputs in the steps context to easily retrieve the values
+                var actionManifestManager = HostContext.GetService<IActionManifestManager>();
+
+                // Format ExpressionValues to Dictionary<string, PipelineContextData>
+                var evaluateContext = new Dictionary<string, PipelineContextData>(StringComparer.OrdinalIgnoreCase);
+                foreach (var pair in ExecutionContext.ExpressionValues)
+                {
+                    evaluateContext[pair.Key] = pair.Value;
+                }
+
+                // Get the evluated composite outputs' values mapped to the outputs named
+                DictionaryContextData actionOutputs = actionManifestManager.EvaluateCompositeOutputs(ExecutionContext, Data.Outputs, evaluateContext);
+
+                // Set the outputs for the outputs object in the whole composite action
+                // Each pair is structured like this
+                // We ignore "description" for now
+                // {
+                //   "the-output-name": {
+                //     "description": "",
+                //     "value": "the value"
+                //   },
+                //   ...
+                // }
+                foreach (var pair in actionOutputs)
+                {
+                    var outputsName = pair.Key;
+                    var outputsAttributes = pair.Value as DictionaryContextData;
+                    outputsAttributes.TryGetValue("value", out var val);
+
+                    if (val != null)
+                    {
+                        var outputsValue = val as StringContextData;
+                        // Set output in the whole composite scope. 
+                        if (!String.IsNullOrEmpty(outputsValue))
+                        {
+                            ExecutionContext.SetOutput(outputsName, outputsValue, out _);
+                        }
+                        else
+                        {
+                            ExecutionContext.SetOutput(outputsName, "", out _);
+                        }
+                    }
+                }
+            }
+        }
+
+        private async Task RunStepsAsync(List<IStep> compositeSteps)
+        {
+            ArgUtil.NotNull(compositeSteps, nameof(compositeSteps));
+
+            // The parent StepsRunner of the whole Composite Action Step handles the cancellation stuff already. 
+            foreach (IStep step in compositeSteps)
+            {
+                Trace.Info($"Processing composite step: DisplayName='{step.DisplayName}'");
+
+                step.ExecutionContext.ExpressionValues["steps"] = ExecutionContext.Global.StepsContext.GetScope(step.ExecutionContext.ScopeName);
+
+                // Populate env context for each step
+                Trace.Info("Initialize Env context for step");
+#if OS_WINDOWS
+                var envContext = new DictionaryContextData();
+#else
+                var envContext = new CaseSensitiveDictionaryContextData();
+#endif
+
+                // Global env
+                foreach (var pair in ExecutionContext.Global.EnvironmentVariables)
+                {
+                    envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
+                }
+
+                // Stomps over with outside step env
+                if (step.ExecutionContext.ExpressionValues.TryGetValue("env", out var envContextData))
+                {
+#if OS_WINDOWS
+                    var dict = envContextData as DictionaryContextData;
+#else
+                    var dict = envContextData as CaseSensitiveDictionaryContextData;
+#endif
+                    foreach (var pair in dict)
+                    {
+                        envContext[pair.Key] = pair.Value;
+                    }
+                }
+
+                step.ExecutionContext.ExpressionValues["env"] = envContext;
+
+                var actionStep = step as IActionRunner;
+
+                try
+                {
+                    // Evaluate and merge action's env block to env context
+                    var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator();
+                    var actionEnvironment = templateEvaluator.EvaluateStepEnvironment(actionStep.Action.Environment, step.ExecutionContext.ExpressionValues, step.ExecutionContext.ExpressionFunctions, Common.Util.VarUtil.EnvironmentVariableKeyComparer);
+                    foreach (var env in actionEnvironment)
+                    {
+                        envContext[env.Key] = new StringContextData(env.Value ?? string.Empty);
+                    }
+                }
+                catch (Exception ex)
+                {
+                    // fail the step since there is an evaluate error.
+                    Trace.Info("Caught exception in Composite Steps Runner from expression for step.env");
+                    // evaluateStepEnvFailed = true;
+                    step.ExecutionContext.Error(ex);
+                    step.ExecutionContext.Complete(TaskResult.Failed);
+                }
+
+                await RunStepAsync(step);
+
+                // Directly after the step, check if the step has failed or cancelled
+                // If so, return that to the output
+                if (step.ExecutionContext.Result == TaskResult.Failed || step.ExecutionContext.Result == TaskResult.Canceled)
+                {
+                    ExecutionContext.Result = step.ExecutionContext.Result;
+                    break;
+                }
+
+                // TODO: Add compat for other types of steps.
+            }
+            // Completion Status handled by StepsRunner for the whole Composite Action Step
+        }
+
+        private async Task RunStepAsync(IStep step)
+        {
+            // Start the step.
+            Trace.Info("Starting the step.");
+            step.ExecutionContext.Debug($"Starting: {step.DisplayName}");
+
+            // TODO: Fix for Step Level Timeout Attributes for an individual Composite Run Step
+            // For now, we are not going to support this for an individual composite run step
+
+            var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator();
+
+            await Common.Util.EncodingUtil.SetEncoding(HostContext, Trace, step.ExecutionContext.CancellationToken);
+
+            try
+            {
+                await step.RunAsync();
+            }
+            catch (OperationCanceledException ex)
+            {
+                if (step.ExecutionContext.CancellationToken.IsCancellationRequested &&
+                    !ExecutionContext.Root.CancellationToken.IsCancellationRequested)
+                {
+                    Trace.Error($"Caught timeout exception from step: {ex.Message}");
+                    step.ExecutionContext.Error("The action has timed out.");
+                    step.ExecutionContext.Result = TaskResult.Failed;
+                }
+                else
+                {
+                    Trace.Error($"Caught cancellation exception from step: {ex}");
+                    step.ExecutionContext.Error(ex);
+                    step.ExecutionContext.Result = TaskResult.Canceled;
+                }
+            }
+            catch (Exception ex)
+            {
+                // Log the error and fail the step.
+                Trace.Error($"Caught exception from step: {ex}");
+                step.ExecutionContext.Error(ex);
+                step.ExecutionContext.Result = TaskResult.Failed;
+            }
+
+            // Merge execution context result with command result
+            if (step.ExecutionContext.CommandResult != null)
+            {
+                step.ExecutionContext.Result = Common.Util.TaskResultUtil.MergeTaskResults(step.ExecutionContext.Result, step.ExecutionContext.CommandResult.Value);
+            }
+
+            Trace.Info($"Step result: {step.ExecutionContext.Result}");
+
+            // Complete the step context.
+            step.ExecutionContext.Debug($"Finishing: {step.DisplayName}");
+        }
+    }
+}

src/Runner.Worker/Handlers/ContainerActionHandler.cs

@@ -49,8 +49,9 @@ namespace GitHub.Runner.Worker.Handlers
                 // ensure docker file exist
                 var dockerFile = Path.Combine(ActionDirectory, Data.Image);
                 ArgUtil.File(dockerFile, nameof(Data.Image));
-                ExecutionContext.Output($"Dockerfile for action: '{dockerFile}'.");
 
+                ExecutionContext.Output($"##[group]Building docker image");
+                ExecutionContext.Output($"Dockerfile for action: '{dockerFile}'.");
                 var imageName = $"{dockerManger.DockerInstanceLabel}:{ExecutionContext.Id.ToString("N")}";
                 var buildExitCode = await dockerManger.DockerBuild(
                     ExecutionContext,
@@ -58,6 +59,8 @@ namespace GitHub.Runner.Worker.Handlers
                     dockerFile,
                     Directory.GetParent(dockerFile).FullName,
                     imageName);
+                ExecutionContext.Output("##[endgroup]");
+
                 if (buildExitCode != 0)
                 {
                     throw new InvalidOperationException($"Docker build failed with exit code {buildExitCode}");
@@ -67,7 +70,7 @@ namespace GitHub.Runner.Worker.Handlers
             }
 
             // run container
-            var container = new ContainerInfo()
+            var container = new ContainerInfo(HostContext)
             {
                 ContainerImage = Data.Image,
                 ContainerName = ExecutionContext.Id.ToString("N"),
@@ -158,16 +161,21 @@ namespace GitHub.Runner.Worker.Handlers
             Directory.CreateDirectory(tempHomeDirectory);
             this.Environment["HOME"] = tempHomeDirectory;
 
+            var tempFileCommandDirectory = Path.Combine(tempDirectory, "_runner_file_commands");
+            ArgUtil.Directory(tempFileCommandDirectory, nameof(tempFileCommandDirectory));
+
             var tempWorkflowDirectory = Path.Combine(tempDirectory, "_github_workflow");
             ArgUtil.Directory(tempWorkflowDirectory, nameof(tempWorkflowDirectory));
 
             container.MountVolumes.Add(new MountVolume("/var/run/docker.sock", "/var/run/docker.sock"));
             container.MountVolumes.Add(new MountVolume(tempHomeDirectory, "/github/home"));
             container.MountVolumes.Add(new MountVolume(tempWorkflowDirectory, "/github/workflow"));
+            container.MountVolumes.Add(new MountVolume(tempFileCommandDirectory, "/github/file_commands"));
             container.MountVolumes.Add(new MountVolume(defaultWorkingDirectory, "/github/workspace"));
 
             container.AddPathTranslateMapping(tempHomeDirectory, "/github/home");
             container.AddPathTranslateMapping(tempWorkflowDirectory, "/github/workflow");
+            container.AddPathTranslateMapping(tempFileCommandDirectory, "/github/file_commands");
             container.AddPathTranslateMapping(defaultWorkingDirectory, "/github/workspace");
 
             container.ContainerWorkDirectory = "/github/workspace";
@@ -185,7 +193,7 @@ namespace GitHub.Runner.Worker.Handlers
             }
 
             // Add Actions Runtime server info
-            var systemConnection = ExecutionContext.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
+            var systemConnection = ExecutionContext.Global.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
             Environment["ACTIONS_RUNTIME_URL"] = systemConnection.Url.AbsoluteUri;
             Environment["ACTIONS_RUNTIME_TOKEN"] = systemConnection.Authorization.Parameters[EndpointAuthorizationParameters.AccessToken];
             if (systemConnection.Data.TryGetValue("CacheServerUrl", out var cacheUrl) && !string.IsNullOrEmpty(cacheUrl))

src/Runner.Worker/Handlers/Handler.cs

@@ -148,14 +148,14 @@ namespace GitHub.Runner.Worker.Handlers
         {
             // Validate args.
             Trace.Entering();
-            ArgUtil.NotNull(ExecutionContext.PrependPath, nameof(ExecutionContext.PrependPath));
+            ArgUtil.NotNull(ExecutionContext.Global.PrependPath, nameof(ExecutionContext.Global.PrependPath));
-            if (ExecutionContext.PrependPath.Count == 0)
+            if (ExecutionContext.Global.PrependPath.Count == 0)
             {
                 return;
             }
 
             // Prepend path.
-            string prepend = string.Join(Path.PathSeparator.ToString(), ExecutionContext.PrependPath.Reverse<string>());
+            string prepend = string.Join(Path.PathSeparator.ToString(), ExecutionContext.Global.PrependPath.Reverse<string>());
             var containerStepHost = StepHost as ContainerStepHost;
             if (containerStepHost != null)
             {

src/Runner.Worker/Handlers/HandlerFactory.cs

@@ -66,6 +66,11 @@ namespace GitHub.Runner.Worker.Handlers
                 handler = HostContext.CreateService<IRunnerPluginHandler>();
                 (handler as IRunnerPluginHandler).Data = data as PluginActionExecutionData;
             }
+            else if (data.ExecutionType == ActionExecutionType.Composite)
+            {
+                handler = HostContext.CreateService<ICompositeActionHandler>();
+                (handler as ICompositeActionHandler).Data = data as CompositeActionExecutionData;
+            }
             else
             {
                 // This should never happen.

src/Runner.Worker/Handlers/NodeScriptActionHandler.cs

@@ -46,7 +46,7 @@ namespace GitHub.Runner.Worker.Handlers
             }
 
             // Add Actions Runtime server info
-            var systemConnection = ExecutionContext.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
+            var systemConnection = ExecutionContext.Global.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
             Environment["ACTIONS_RUNTIME_URL"] = systemConnection.Url.AbsoluteUri;
             Environment["ACTIONS_RUNTIME_TOKEN"] = systemConnection.Authorization.Parameters[EndpointAuthorizationParameters.AccessToken];
             if (systemConnection.Data.TryGetValue("CacheServerUrl", out var cacheUrl) && !string.IsNullOrEmpty(cacheUrl))
@@ -113,7 +113,7 @@ namespace GitHub.Runner.Worker.Handlers
                                                 requireExitCodeZero: false,
                                                 outputEncoding: outputEncoding,
                                                 killProcessOnCancel: false,
-                                                inheritConsoleHandler: !ExecutionContext.Variables.Retain_Default_Encoding,
+                                                inheritConsoleHandler: !ExecutionContext.Global.Variables.Retain_Default_Encoding,
                                                 cancellationToken: ExecutionContext.CancellationToken);
 
                 // Wait for either the node exit or force finish through ##vso command

src/Runner.Worker/Handlers/OutputManager.cs

@@ -31,7 +31,7 @@ namespace GitHub.Runner.Worker.Handlers
         {
             _executionContext = executionContext;
             _commandManager = commandManager;
-            _container = container ?? executionContext.Container;
+            _container = container ?? executionContext.Global.Container;
 
             // Recursion failsafe (test override)
             var failsafeString = Environment.GetEnvironmentVariable("RUNNER_TEST_GET_REPOSITORY_PATH_FAILSAFE");
@@ -41,7 +41,7 @@ namespace GitHub.Runner.Worker.Handlers
             }
 
             // Determine the timeout
-            var timeoutStr = _executionContext.Variables.Get(_timeoutKey);
+            var timeoutStr = _executionContext.Global.Variables.Get(_timeoutKey);
             if (string.IsNullOrEmpty(timeoutStr) ||
                 !TimeSpan.TryParse(timeoutStr, CultureInfo.InvariantCulture, out _timeout) ||
                 _timeout <= TimeSpan.Zero)
@@ -352,15 +352,24 @@ namespace GitHub.Runner.Worker.Handlers
                 if (File.Exists(gitConfigPath))
                 {
                     // Check if the config contains the workflow repository url
-                    var qualifiedRepository = _executionContext.GetGitHubContext("repository");
+                    var serverUrl = _executionContext.GetGitHubContext("server_url");
-                    var configMatch = $"url = https://github.com/{qualifiedRepository}";
+                    serverUrl = !string.IsNullOrEmpty(serverUrl) ? serverUrl : "https://github.com";
+                    var host = new Uri(serverUrl, UriKind.Absolute).Host;
+                    var nameWithOwner = _executionContext.GetGitHubContext("repository");
+                    var patterns = new[] {
+                        $"url = {serverUrl}/{nameWithOwner}",
+                        $"url = git@{host}:{nameWithOwner}.git",
+                    };
                     var content = File.ReadAllText(gitConfigPath);
                     foreach (var line in content.Split("\n").Select(x => x.Trim()))
                     {
-                        if (String.Equals(line, configMatch, StringComparison.OrdinalIgnoreCase))
+                        foreach (var pattern in patterns)
                         {
-                            repositoryPath = directoryPath;
+                            if (String.Equals(line, pattern, StringComparison.OrdinalIgnoreCase))
-                            break;
+                            {
+                                repositoryPath = directoryPath;
+                                break;
+                            }
                         }
                     }
                 }

src/Runner.Worker/Handlers/ScriptHandler.cs

@@ -23,6 +23,19 @@ namespace GitHub.Runner.Worker.Handlers
 
         public override void PrintActionDetails(ActionRunStage stage)
         {
+            // We don't want to display the internal workings if composite (similar/equivalent information can be found in debug)
+            void writeDetails(string message)
+            {
+                if (ExecutionContext.InsideComposite)
+                {
+                    ExecutionContext.Debug(message);
+                }
+                else
+                {
+                    ExecutionContext.Output(message);
+                }
+            }
+
             if (stage == ActionRunStage.Post)
             {
                 throw new NotSupportedException("Script action should not have 'Post' job action.");
@@ -39,7 +52,7 @@ namespace GitHub.Runner.Worker.Handlers
                     firstLine = firstLine.Substring(0, firstNewLine);
                 }
 
-                ExecutionContext.Output($"##[group]Run {firstLine}");
+                writeDetails(ExecutionContext.InsideComposite ? $"Run {firstLine}" : $"##[group]Run {firstLine}");
             }
             else
             {
@@ -50,20 +63,20 @@ namespace GitHub.Runner.Worker.Handlers
             foreach (var line in multiLines)
             {
                 // Bright Cyan color
-                ExecutionContext.Output($"\x1b[36;1m{line}\x1b[0m");
+                writeDetails($"\x1b[36;1m{line}\x1b[0m");
             }
 
             string argFormat;
             string shellCommand;
             string shellCommandPath = null;
             bool validateShellOnHost = !(StepHost is ContainerStepHost);
-            string prependPath = string.Join(Path.PathSeparator.ToString(), ExecutionContext.PrependPath.Reverse<string>());
+            string prependPath = string.Join(Path.PathSeparator.ToString(), ExecutionContext.Global.PrependPath.Reverse<string>());
             string shell = null;
             if (!Inputs.TryGetValue("shell", out shell) || string.IsNullOrEmpty(shell))
             {
                 // TODO: figure out how defaults interact with template later
                 // for now, we won't check job.defaults if we are inside a template.
-                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.JobDefaults.TryGetValue("run", out var runDefaults))
+                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.Global.JobDefaults.TryGetValue("run", out var runDefaults))
                 {
                     runDefaults.TryGetValue("shell", out shell);
                 }
@@ -109,23 +122,23 @@ namespace GitHub.Runner.Worker.Handlers
 
             if (!string.IsNullOrEmpty(shellCommandPath))
             {
-                ExecutionContext.Output($"shell: {shellCommandPath} {argFormat}");
+                writeDetails($"shell: {shellCommandPath} {argFormat}");
             }
             else
             {
-                ExecutionContext.Output($"shell: {shellCommand} {argFormat}");
+                writeDetails($"shell: {shellCommand} {argFormat}");
             }
 
             if (this.Environment?.Count > 0)
             {
-                ExecutionContext.Output("env:");
+                writeDetails("env:");
                 foreach (var env in this.Environment)
                 {
-                    ExecutionContext.Output($"  {env.Key}: {env.Value}");
+                    writeDetails($"  {env.Key}: {env.Value}");
                 }
             }
 
-            ExecutionContext.Output("##[endgroup]");
+            writeDetails(ExecutionContext.InsideComposite ? "" : "##[endgroup]");
         }
 
         public async Task RunAsync(ActionRunStage stage)
@@ -151,9 +164,7 @@ namespace GitHub.Runner.Worker.Handlers
             string workingDirectory = null;
             if (!Inputs.TryGetValue("workingDirectory", out workingDirectory))
             {
-                // TODO: figure out how defaults interact with template later
+                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.Global.JobDefaults.TryGetValue("run", out var runDefaults))
-                // for now, we won't check job.defaults if we are inside a template.
-                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.JobDefaults.TryGetValue("run", out var runDefaults))
                 {
                     if (runDefaults.TryGetValue("working-directory", out workingDirectory))
                     {
@@ -167,9 +178,7 @@ namespace GitHub.Runner.Worker.Handlers
             string shell = null;
             if (!Inputs.TryGetValue("shell", out shell) || string.IsNullOrEmpty(shell))
             {
-                // TODO: figure out how defaults interact with template later
+                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.Global.JobDefaults.TryGetValue("run", out var runDefaults))
-                // for now, we won't check job.defaults if we are inside a template.
-                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.JobDefaults.TryGetValue("run", out var runDefaults))
                 {
                     if (runDefaults.TryGetValue("shell", out shell))
                     {
@@ -180,7 +189,7 @@ namespace GitHub.Runner.Worker.Handlers
 
             var isContainerStepHost = StepHost is ContainerStepHost;
 
-            string prependPath = string.Join(Path.PathSeparator.ToString(), ExecutionContext.PrependPath.Reverse<string>());
+            string prependPath = string.Join(Path.PathSeparator.ToString(), ExecutionContext.Global.PrependPath.Reverse<string>());
             string commandPath, argFormat, shellCommand;
             // Set up default command and arguments
             if (string.IsNullOrEmpty(shell))
@@ -232,7 +241,7 @@ namespace GitHub.Runner.Worker.Handlers
 #if OS_WINDOWS
             // Normalize Windows line endings
             contents = contents.Replace("\r\n", "\n").Replace("\n", "\r\n");
-            var encoding = ExecutionContext.Variables.Retain_Default_Encoding && Console.InputEncoding.CodePage != 65001
+            var encoding = ExecutionContext.Global.Variables.Retain_Default_Encoding && Console.InputEncoding.CodePage != 65001
                 ? Console.InputEncoding
                 : new UTF8Encoding(false);
 #else
@@ -285,7 +294,7 @@ namespace GitHub.Runner.Worker.Handlers
                                             requireExitCodeZero: false,
                                             outputEncoding: null,
                                             killProcessOnCancel: false,
-                                            inheritConsoleHandler: !ExecutionContext.Variables.Retain_Default_Encoding,
+                                            inheritConsoleHandler: !ExecutionContext.Global.Variables.Retain_Default_Encoding,
                                             cancellationToken: ExecutionContext.CancellationToken);
 
                 // Error

src/Runner.Worker/JobExtension.cs

@@ -5,6 +5,7 @@ using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Runtime.Serialization;
+using System.Threading;
 using System.Threading.Tasks;
 using GitHub.DistributedTask.Expressions2;
 using GitHub.DistributedTask.ObjectTemplating.Tokens;
@@ -41,6 +42,8 @@ namespace GitHub.Runner.Worker
         private readonly HashSet<string> _existingProcesses = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
         private bool _processCleanup;
         private string _processLookupId = $"github_{Guid.NewGuid()}";
+        private CancellationTokenSource _diskSpaceCheckToken = new CancellationTokenSource();
+        private Task _diskSpaceCheckTask = null;
 
         // Download all required actions.
         // Make sure all condition inputs are valid.
@@ -64,6 +67,24 @@ namespace GitHub.Runner.Worker
                     context.Debug($"Starting: Set up job");
                     context.Output($"Current runner version: '{BuildConstants.RunnerPackage.Version}'");
 
+                    var setting = HostContext.GetService<IConfigurationStore>().GetSettings();
+                    var credFile = HostContext.GetConfigFile(WellKnownConfigFile.Credentials);
+                    if (File.Exists(credFile))
+                    {
+                        var credData = IOUtil.LoadObject<CredentialData>(credFile);
+                        if (credData != null &&
+                            credData.Data.TryGetValue("clientId", out var clientId))
+                        {
+                            // print out HostName for self-hosted runner
+                            context.Output($"Runner name: '{setting.AgentName}'");
+                            if (message.Variables.TryGetValue("system.runnerGroupName", out VariableValue runnerGroupName))
+                            {
+                                context.Output($"Runner group name: '{runnerGroupName.Value}'");
+                            }
+                            context.Output($"Machine name: '{Environment.MachineName}'");
+                        }
+                    }
+
                     var setupInfoFile = HostContext.GetConfigFile(WellKnownConfigFile.SetupInfo);
                     if (File.Exists(setupInfoFile))
                     {
@@ -131,12 +152,13 @@ namespace GitHub.Runner.Worker
                     // Temporary hack for GHES alpha
                     var configurationStore = HostContext.GetService<IConfigurationStore>();
                     var runnerSettings = configurationStore.GetSettings();
-                    if (string.IsNullOrEmpty(context.GetGitHubContext("url")) && !runnerSettings.IsHostedServer && !string.IsNullOrEmpty(runnerSettings.GitHubUrl))
+                    if (string.IsNullOrEmpty(context.GetGitHubContext("server_url")) && !runnerSettings.IsHostedServer && !string.IsNullOrEmpty(runnerSettings.GitHubUrl))
                     {
                         var url = new Uri(runnerSettings.GitHubUrl);
                         var portInfo = url.IsDefaultPort ? string.Empty : $":{url.Port.ToString(CultureInfo.InvariantCulture)}";
-                        context.SetGitHubContext("url", $"{url.Scheme}://{url.Host}{portInfo}");
+                        context.SetGitHubContext("server_url", $"{url.Scheme}://{url.Host}{portInfo}");
                         context.SetGitHubContext("api_url", $"{url.Scheme}://{url.Host}{portInfo}/api/v3");
+                        context.SetGitHubContext("graphql_url", $"{url.Scheme}://{url.Host}{portInfo}/api/graphql");
                     }
 
                     // Evaluate the job-level environment variables
@@ -147,7 +169,7 @@ namespace GitHub.Runner.Worker
                         var environmentVariables = templateEvaluator.EvaluateStepEnvironment(token, jobContext.ExpressionValues, jobContext.ExpressionFunctions, VarUtil.EnvironmentVariableKeyComparer);
                         foreach (var pair in environmentVariables)
                         {
-                            context.EnvironmentVariables[pair.Key] = pair.Value ?? string.Empty;
+                            context.Global.EnvironmentVariables[pair.Key] = pair.Value ?? string.Empty;
                             context.SetEnvContext(pair.Key, pair.Value ?? string.Empty);
                         }
                     }
@@ -157,7 +179,7 @@ namespace GitHub.Runner.Worker
                     var container = templateEvaluator.EvaluateJobContainer(message.JobContainer, jobContext.ExpressionValues, jobContext.ExpressionFunctions);
                     if (container != null)
                     {
-                        jobContext.Container = new Container.ContainerInfo(HostContext, container);
+                        jobContext.Global.Container = new Container.ContainerInfo(HostContext, container);
                     }
 
                     // Evaluate the job service containers
@@ -169,7 +191,7 @@ namespace GitHub.Runner.Worker
                         {
                             var networkAlias = pair.Key;
                             var serviceContainer = pair.Value;
-                            jobContext.ServiceContainers.Add(new Container.ContainerInfo(HostContext, serviceContainer, false, networkAlias));
+                            jobContext.Global.ServiceContainers.Add(new Container.ContainerInfo(HostContext, serviceContainer, false, networkAlias));
                         }
                     }
 
@@ -180,14 +202,14 @@ namespace GitHub.Runner.Worker
                         var defaults = token.AssertMapping("defaults");
                         if (defaults.Any(x => string.Equals(x.Key.AssertString("defaults key").Value, "run", StringComparison.OrdinalIgnoreCase)))
                         {
-                            context.JobDefaults["run"] = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+                            context.Global.JobDefaults["run"] = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
                             var defaultsRun = defaults.First(x => string.Equals(x.Key.AssertString("defaults key").Value, "run", StringComparison.OrdinalIgnoreCase));
                             var jobDefaults = templateEvaluator.EvaluateJobDefaultsRun(defaultsRun.Value, jobContext.ExpressionValues, jobContext.ExpressionFunctions);
                             foreach (var pair in jobDefaults)
                             {
                                 if (!string.IsNullOrEmpty(pair.Value))
                                 {
-                                    context.JobDefaults["run"][pair.Key] = pair.Value;
+                                    context.Global.JobDefaults["run"][pair.Key] = pair.Value;
                                 }
                             }
                         }
@@ -201,15 +223,15 @@ namespace GitHub.Runner.Worker
                     preJobSteps.AddRange(prepareResult.ContainerSetupSteps);
 
                     // Add start-container steps, record and stop-container steps
-                    if (jobContext.Container != null || jobContext.ServiceContainers.Count > 0)
+                    if (jobContext.Global.Container != null || jobContext.Global.ServiceContainers.Count > 0)
                     {
                         var containerProvider = HostContext.GetService<IContainerOperationProvider>();
                         var containers = new List<Container.ContainerInfo>();
-                        if (jobContext.Container != null)
+                        if (jobContext.Global.Container != null)
                         {
-                            containers.Add(jobContext.Container);
+                            containers.Add(jobContext.Global.Container);
                         }
-                        containers.AddRange(jobContext.ServiceContainers);
+                        containers.AddRange(jobContext.Global.ServiceContainers);
 
                         preJobSteps.Add(new JobExtensionRunner(runAsync: containerProvider.StartContainersAsync,
                                                                           condition: $"{PipelineTemplateConstants.Success}()",
@@ -281,7 +303,7 @@ namespace GitHub.Runner.Worker
                         {
                             ArgUtil.NotNull(actionStep, step.DisplayName);
                             intraActionStates.TryGetValue(actionStep.Action.Id, out var intraActionState);
-                            actionStep.ExecutionContext = jobContext.CreateChild(actionStep.Action.Id, actionStep.DisplayName, actionStep.Action.Name, actionStep.Action.ScopeName, actionStep.Action.ContextName, intraActionState);
+                            actionStep.ExecutionContext = jobContext.CreateChild(actionStep.Action.Id, actionStep.DisplayName, actionStep.Action.Name, null, actionStep.Action.ContextName, intraActionState);
                         }
                     }
 
@@ -290,7 +312,7 @@ namespace GitHub.Runner.Worker
                     steps.AddRange(jobSteps);
 
                     // Prepare for orphan process cleanup
-                    _processCleanup = jobContext.Variables.GetBoolean("process.clean") ?? true;
+                    _processCleanup = jobContext.Global.Variables.GetBoolean("process.clean") ?? true;
                     if (_processCleanup)
                     {
                         // Set the RUNNER_TRACKING_ID env variable.
@@ -306,6 +328,12 @@ namespace GitHub.Runner.Worker
                         }
                     }
 
+                    jobContext.Global.EnvironmentVariables.TryGetValue(Constants.Runner.Features.DiskSpaceWarning, out var enableWarning);
+                    if (StringUtil.ConvertToBoolean(enableWarning, defaultValue: true))
+                    {
+                        _diskSpaceCheckTask = CheckDiskSpaceAsync(context, _diskSpaceCheckToken.Token);
+                    }
+
                     return steps;
                 }
                 catch (OperationCanceledException ex) when (jobContext.CancellationToken.IsCancellationRequested)
@@ -316,6 +344,14 @@ namespace GitHub.Runner.Worker
                     context.Result = TaskResult.Canceled;
                     throw;
                 }
+                catch (FailedToResolveActionDownloadInfoException ex)
+                {
+                    // Log the error and fail the JobExtension Initialization.
+                    Trace.Error($"Caught exception from JobExtenion Initialization: {ex}");
+                    context.InfrastructureError(ex.Message);
+                    context.Result = TaskResult.Failed;
+                    throw;
+                }
                 catch (Exception ex)
                 {
                     // Log the error and fail the JobExtension Initialization.
@@ -346,6 +382,24 @@ namespace GitHub.Runner.Worker
                     context.Start();
                     context.Debug("Starting: Complete job");
 
+                    Trace.Info("Initialize Env context");
+
+#if OS_WINDOWS
+                    var envContext = new DictionaryContextData();
+#else
+                    var envContext = new CaseSensitiveDictionaryContextData();
+#endif
+                    context.ExpressionValues["env"] = envContext;
+                    foreach (var pair in context.Global.EnvironmentVariables)
+                    {
+                        envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
+                    }
+
+                    // Populate env context for each step
+                    Trace.Info("Initialize steps context");
+                    context.ExpressionValues["steps"] = context.Global.StepsContext.GetScope(context.ScopeName);
+
+                    var templateEvaluator = context.ToPipelineTemplateEvaluator();
                     // Evaluate job outputs
                     if (message.JobOutputs != null && message.JobOutputs.Type != TokenType.Null)
                     {
@@ -355,21 +409,7 @@ namespace GitHub.Runner.Worker
 
                             // Populate env context for each step
                             Trace.Info("Initialize Env context for evaluating job outputs");
-#if OS_WINDOWS
-                            var envContext = new DictionaryContextData();
-#else
-                            var envContext = new CaseSensitiveDictionaryContextData();
-#endif
-                            context.ExpressionValues["env"] = envContext;
-                            foreach (var pair in context.EnvironmentVariables)
-                            {
-                                envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
-                            }
 
-                            Trace.Info("Initialize steps context for evaluating job outputs");
-                            context.ExpressionValues["steps"] = context.StepsContext.GetScope(context.ScopeName);
-
-                            var templateEvaluator = context.ToPipelineTemplateEvaluator();
                             var outputs = templateEvaluator.EvaluateJobOutput(message.JobOutputs, context.ExpressionValues, context.ExpressionFunctions);
                             foreach (var output in outputs)
                             {
@@ -398,7 +438,35 @@ namespace GitHub.Runner.Worker
                         }
                     }
 
-                    if (context.Variables.GetBoolean(Constants.Variables.Actions.RunnerDebug) ?? false)
+                    // Evaluate environment data
+                    if (jobContext.ActionsEnvironment?.Url != null && jobContext.ActionsEnvironment?.Url.Type != TokenType.Null)
+                    {
+                        try
+                        {
+                            context.Output($"Evaluate and set environment url");
+
+                            var environmentUrlToken = templateEvaluator.EvaluateEnvironmentUrl(jobContext.ActionsEnvironment.Url, context.ExpressionValues, context.ExpressionFunctions);
+                            var environmentUrl = environmentUrlToken.AssertString("environment.url");
+                            if (!string.Equals(environmentUrl.Value, HostContext.SecretMasker.MaskSecrets(environmentUrl.Value)))
+                            {
+                                context.Warning($"Skip setting environment url as environment '{jobContext.ActionsEnvironment.Name}' may contain secret.");
+                            }
+                            else
+                            {
+                                context.Output($"Evaluated environment url: {environmentUrl}");
+                                jobContext.ActionsEnvironment.Url = environmentUrlToken;
+                            }
+                        }
+                        catch (Exception ex)
+                        {
+                            context.Result = TaskResult.Failed;
+                            context.Error($"Failed to evaluate environment url");
+                            context.Error(ex);
+                            jobContext.Result = TaskResultUtil.MergeTaskResults(jobContext.Result, TaskResult.Failed);
+                        }
+                    }
+
+                    if (context.Global.Variables.GetBoolean(Constants.Variables.Actions.RunnerDebug) ?? false)
                     {
                         Trace.Info("Support log upload starting.");
                         context.Output("Uploading runner diagnostic logs");
@@ -470,6 +538,11 @@ namespace GitHub.Runner.Worker
                             }
                         }
                     }
+
+                    if (_diskSpaceCheckTask != null)
+                    {
+                        _diskSpaceCheckToken.Cancel();
+                    }
                 }
                 catch (Exception ex)
                 {
@@ -485,6 +558,39 @@ namespace GitHub.Runner.Worker
             }
         }
 
+        private async Task CheckDiskSpaceAsync(IExecutionContext context, CancellationToken token)
+        {
+            while (!token.IsCancellationRequested)
+            {
+                // Add warning when disk is lower than system.runner.lowdiskspacethreshold from service (default to 100 MB on service side)
+                var lowDiskSpaceThreshold = context.Global.Variables.GetInt(WellKnownDistributedTaskVariables.RunnerLowDiskspaceThreshold);
+                if (lowDiskSpaceThreshold == null)
+                {
+                    Trace.Info($"Low diskspace warning is not enabled.");
+                    return;
+                }
+                var workDirRoot = Directory.GetDirectoryRoot(HostContext.GetDirectory(WellKnownDirectory.Work));
+                var driveInfo = new DriveInfo(workDirRoot);
+                var freeSpaceInMB = driveInfo.AvailableFreeSpace / 1024 / 1024;
+                if (freeSpaceInMB < lowDiskSpaceThreshold)
+                {
+                    var issue = new Issue() { Type = IssueType.Warning, Message = $"You are running out of disk space. The runner will stop working when the machine runs out of disk space. Free space left: {freeSpaceInMB} MB" };
+                    issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.LowDiskSpace;
+                    context.AddIssue(issue);
+                    return;
+                }
+
+                try
+                {
+                    await Task.Delay(10 * 1000, token);
+                }
+                catch (TaskCanceledException)
+                {
+                    // ignore
+                }
+            }
+        }
+
         private Dictionary<int, Process> SnapshotProcesses()
         {
             Dictionary<int, Process> snapshot = new Dictionary<int, Process>();

src/Runner.Worker/JobRunner.cs

@@ -5,21 +5,13 @@ using GitHub.Services.Common;
 using GitHub.Services.WebApi;
 using System;
 using System.Collections.Generic;
-using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Net.Http;
-using System.Text;
-using System.IO.Compression;
-using System.Diagnostics;
-using Newtonsoft.Json.Linq;
-using GitHub.DistributedTask.ObjectTemplating.Tokens;
 using GitHub.Runner.Common;
 using GitHub.Runner.Sdk;
-using GitHub.DistributedTask.Pipelines.ContextData;
-using GitHub.DistributedTask.ObjectTemplating;
 
 namespace GitHub.Runner.Worker
 {
@@ -107,7 +99,7 @@ namespace GitHub.Runner.Worker
                     return await CompleteJobAsync(jobServer, jobContext, message, TaskResult.Failed);
                 }
 
-                if (jobContext.WriteDebug)
+                if (jobContext.Global.WriteDebug)
                 {
                     jobContext.SetRunnerContext("debug", "1");
                 }
@@ -122,13 +114,6 @@ namespace GitHub.Runner.Worker
                 _tempDirectoryManager = HostContext.GetService<ITempDirectoryManager>();
                 _tempDirectoryManager.InitializeTempDirectory(jobContext);
 
-                // // Expand container properties
-                // jobContext.Container?.ExpandProperties(jobContext.Variables);
-                // foreach (var sidecar in jobContext.SidecarContainers)
-                // {
-                //     sidecar.ExpandProperties(jobContext.Variables);
-                // }
-
                 // Get the job extension.
                 Trace.Info("Getting job extension.");
                 IJobExtension jobExtension = HostContext.CreateService<IJobExtension>();
@@ -224,14 +209,14 @@ namespace GitHub.Runner.Worker
             // Clean TEMP after finish process jobserverqueue, since there might be a pending fileupload still use the TEMP dir.
             _tempDirectoryManager?.CleanupTempDirectory();
 
-            if (!jobContext.Features.HasFlag(PlanFeatures.JobCompletedPlanEvent))
+            if (!jobContext.Global.Features.HasFlag(PlanFeatures.JobCompletedPlanEvent))
             {
                 Trace.Info($"Skip raise job completed event call from worker because Plan version is {message.Plan.Version}");
                 return result;
             }
 
             Trace.Info("Raising job completed event.");
-            var jobCompletedEvent = new JobCompletedEvent(message.RequestId, message.JobId, result, jobContext.JobOutputs);
+            var jobCompletedEvent = new JobCompletedEvent(message.RequestId, message.JobId, result, jobContext.JobOutputs, jobContext.ActionsEnvironment);
 
             var completeJobRetryLimit = 5;
             var exceptions = new List<Exception>();
@@ -254,6 +239,12 @@ namespace GitHub.Runner.Worker
                     Trace.Error(ex);
                     return TaskResult.Failed;
                 }
+                catch (TaskOrchestrationPlanTerminatedException ex)
+                {
+                    Trace.Error($"TaskOrchestrationPlanTerminatedException received, while attempting to raise JobCompletedEvent for job {message.JobId}.");
+                    Trace.Error(ex);
+                    return TaskResult.Failed;
+                }
                 catch (Exception ex)
                 {
                     Trace.Error($"Catch exception while attempting to raise JobCompletedEvent for job {message.JobId}, job request {message.RequestId}.");

src/Runner.Worker/RunnerPluginManager.cs

@@ -100,12 +100,12 @@ namespace GitHub.Runner.Worker
             RunnerActionPluginExecutionContext pluginContext = new RunnerActionPluginExecutionContext
             {
                 Inputs = inputs,
-                Endpoints = context.Endpoints,
+                Endpoints = context.Global.Endpoints,
                 Context = context.ExpressionValues
             };
 
             // variables
-            foreach (var variable in context.Variables.AllVariables)
+            foreach (var variable in context.Global.Variables.AllVariables)
             {
                 pluginContext.Variables[variable.Name] = new VariableValue(variable.Value, variable.Secret);
             }

src/Runner.Worker/StepsContext.cs

@@ -15,6 +15,14 @@ namespace GitHub.Runner.Worker
         private static readonly Regex _propertyRegex = new Regex("^[a-zA-Z_][a-zA-Z0-9_]*$", RegexOptions.Compiled);
         private readonly DictionaryContextData _contextData = new DictionaryContextData();
 
+        public void ClearScope(string scopeName)
+        {
+            if (_contextData.TryGetValue(scopeName, out _))
+            {
+                _contextData[scopeName] = new DictionaryContextData();
+            } 
+        }
+
         public DictionaryContextData GetScope(string scopeName)
         {
             if (scopeName == null)

src/Runner.Worker/StepsRunner.cs

@@ -66,11 +66,11 @@ namespace GitHub.Runner.Worker
                 }
 
                 var step = jobContext.JobSteps.Dequeue();
-                var nextStep = jobContext.JobSteps.Count > 0 ? jobContext.JobSteps.Peek() : null;
 
                 Trace.Info($"Processing step: DisplayName='{step.DisplayName}'");
                 ArgUtil.NotNull(step.ExecutionContext, nameof(step.ExecutionContext));
-                ArgUtil.NotNull(step.ExecutionContext.Variables, nameof(step.ExecutionContext.Variables));
+                ArgUtil.NotNull(step.ExecutionContext.Global, nameof(step.ExecutionContext.Global));
+                ArgUtil.NotNull(step.ExecutionContext.Global.Variables, nameof(step.ExecutionContext.Global.Variables));
 
                 // Start
                 step.ExecutionContext.Start();
@@ -82,27 +82,32 @@ namespace GitHub.Runner.Worker
                 step.ExecutionContext.ExpressionFunctions.Add(new FunctionInfo<SuccessFunction>(PipelineTemplateConstants.Success, 0, 0));
                 step.ExecutionContext.ExpressionFunctions.Add(new FunctionInfo<HashFilesFunction>(PipelineTemplateConstants.HashFiles, 1, byte.MaxValue));
 
-                // Initialize scope
+                step.ExecutionContext.ExpressionValues["steps"] = step.ExecutionContext.Global.StepsContext.GetScope(step.ExecutionContext.ScopeName);
-                if (InitializeScope(step, scopeInputs))
+
-                {
+                // Populate env context for each step
-                    // Populate env context for each step
+                Trace.Info("Initialize Env context for step");
-                    Trace.Info("Initialize Env context for step");
 #if OS_WINDOWS
-                    var envContext = new DictionaryContextData();
+                var envContext = new DictionaryContextData();
 #else
-                    var envContext = new CaseSensitiveDictionaryContextData();
+                var envContext = new CaseSensitiveDictionaryContextData();
 #endif
-                    step.ExecutionContext.ExpressionValues["env"] = envContext;
-                    foreach (var pair in step.ExecutionContext.EnvironmentVariables)
-                    {
-                        envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
-                    }
 
-                    if (step is IActionRunner actionStep)
+                // Global env
-                    {
+                foreach (var pair in step.ExecutionContext.Global.EnvironmentVariables)
-                        // Set GITHUB_ACTION
+                {
-                        step.ExecutionContext.SetGitHubContext("action", actionStep.Action.Name);
+                    envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
+                }
 
+                step.ExecutionContext.ExpressionValues["env"] = envContext;
+
+                bool evaluateStepEnvFailed = false;
+                if (step is IActionRunner actionStep)
+                {
+                    // Set GITHUB_ACTION
+                    step.ExecutionContext.SetGitHubContext("action", actionStep.Action.Name);
+
+                    try
+                    {
                         // Evaluate and merge action's env block to env context
                         var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator();
                         var actionEnvironment = templateEvaluator.EvaluateStepEnvironment(actionStep.Action.Environment, step.ExecutionContext.ExpressionValues, step.ExecutionContext.ExpressionFunctions, VarUtil.EnvironmentVariableKeyComparer);
@@ -111,7 +116,18 @@ namespace GitHub.Runner.Worker
                             envContext[env.Key] = new StringContextData(env.Value ?? string.Empty);
                         }
                     }
+                    catch (Exception ex)
+                    {
+                        // fail the step since there is an evaluate error.
+                        Trace.Info("Caught exception from expression for step.env");
+                        evaluateStepEnvFailed = true;
+                        step.ExecutionContext.Error(ex);
+                        CompleteStep(step, TaskResult.Failed);
+                    }
+                }
 
+                if (!evaluateStepEnvFailed)
+                {
                     try
                     {
                         // Register job cancellation call back only if job cancellation token not been fire before each step run
@@ -195,19 +211,19 @@ namespace GitHub.Runner.Worker
                         {
                             // Condition == false
                             Trace.Info("Skipping step due to condition evaluation.");
-                            CompleteStep(step, nextStep, TaskResult.Skipped, resultCode: conditionTraceWriter.Trace);
+                            CompleteStep(step, TaskResult.Skipped, resultCode: conditionTraceWriter.Trace);
                         }
                         else if (conditionEvaluateError != null)
                         {
                             // fail the step since there is an evaluate error.
                             step.ExecutionContext.Error(conditionEvaluateError);
-                            CompleteStep(step, nextStep, TaskResult.Failed);
+                            CompleteStep(step, TaskResult.Failed);
                         }
                         else
                         {
                             // Run the step.
                             await RunStepAsync(step, jobContext.CancellationToken);
-                            CompleteStep(step, nextStep);
+                            CompleteStep(step);
                         }
                     }
                     finally
@@ -270,40 +286,7 @@ namespace GitHub.Runner.Worker
                 step.ExecutionContext.SetTimeout(timeout);
             }
 
-#if OS_WINDOWS
+            await EncodingUtil.SetEncoding(HostContext, Trace, step.ExecutionContext.CancellationToken);
-            try
-            {
-                if (Console.InputEncoding.CodePage != 65001)
-                {
-                    using (var p = HostContext.CreateService<IProcessInvoker>())
-                    {
-                        // Use UTF8 code page
-                        int exitCode = await p.ExecuteAsync(workingDirectory: HostContext.GetDirectory(WellKnownDirectory.Work),
-                                                fileName: WhichUtil.Which("chcp", true, Trace),
-                                                arguments: "65001",
-                                                environment: null,
-                                                requireExitCodeZero: false,
-                                                outputEncoding: null,
-                                                killProcessOnCancel: false,
-                                                redirectStandardIn: null,
-                                                inheritConsoleHandler: true,
-                                                cancellationToken: step.ExecutionContext.CancellationToken);
-                        if (exitCode == 0)
-                        {
-                            Trace.Info("Successfully returned to code page 65001 (UTF8)");
-                        }
-                        else
-                        {
-                            Trace.Warning($"'chcp 65001' failed with exit code {exitCode}");
-                        }
-                    }
-                }
-            }
-            catch (Exception ex)
-            {
-                Trace.Warning($"'chcp 65001' failed with exception {ex.Message}");
-            }
-#endif
 
             try
             {
@@ -369,117 +352,9 @@ namespace GitHub.Runner.Worker
             step.ExecutionContext.Debug($"Finishing: {step.DisplayName}");
         }
 
-        private bool InitializeScope(IStep step, Dictionary<string, PipelineContextData> scopeInputs)
+        private void CompleteStep(IStep step, TaskResult? result = null, string resultCode = null)
         {
             var executionContext = step.ExecutionContext;
-            var stepsContext = executionContext.StepsContext;
-            if (!string.IsNullOrEmpty(executionContext.ScopeName))
-            {
-                // Gather uninitialized current and ancestor scopes
-                var scope = executionContext.Scopes[executionContext.ScopeName];
-                var scopesToInitialize = default(Stack<ContextScope>);
-                while (scope != null && !scopeInputs.ContainsKey(scope.Name))
-                {
-                    if (scopesToInitialize == null)
-                    {
-                        scopesToInitialize = new Stack<ContextScope>();
-                    }
-                    scopesToInitialize.Push(scope);
-                    scope = string.IsNullOrEmpty(scope.ParentName) ? null : executionContext.Scopes[scope.ParentName];
-                }
-
-                // Initialize current and ancestor scopes
-                while (scopesToInitialize?.Count > 0)
-                {
-                    scope = scopesToInitialize.Pop();
-                    executionContext.Debug($"Initializing scope '{scope.Name}'");
-                    executionContext.ExpressionValues["steps"] = stepsContext.GetScope(scope.ParentName);
-                    executionContext.ExpressionValues["inputs"] = !String.IsNullOrEmpty(scope.ParentName) ? scopeInputs[scope.ParentName] : null;
-                    var templateEvaluator = executionContext.ToPipelineTemplateEvaluator();
-                    var inputs = default(DictionaryContextData);
-                    try
-                    {
-                        inputs = templateEvaluator.EvaluateStepScopeInputs(scope.Inputs, executionContext.ExpressionValues, executionContext.ExpressionFunctions);
-                    }
-                    catch (Exception ex)
-                    {
-                        Trace.Info($"Caught exception from initialize scope '{scope.Name}'");
-                        Trace.Error(ex);
-                        executionContext.Error(ex);
-                        executionContext.Complete(TaskResult.Failed);
-                        return false;
-                    }
-
-                    scopeInputs[scope.Name] = inputs;
-                }
-            }
-
-            // Setup expression values
-            var scopeName = executionContext.ScopeName;
-            executionContext.ExpressionValues["steps"] = stepsContext.GetScope(scopeName);
-            executionContext.ExpressionValues["inputs"] = string.IsNullOrEmpty(scopeName) ? null : scopeInputs[scopeName];
-
-            return true;
-        }
-
-        private void CompleteStep(IStep step, IStep nextStep, TaskResult? result = null, string resultCode = null)
-        {
-            var executionContext = step.ExecutionContext;
-            if (!string.IsNullOrEmpty(executionContext.ScopeName))
-            {
-                // Gather current and ancestor scopes to finalize
-                var scope = executionContext.Scopes[executionContext.ScopeName];
-                var scopesToFinalize = default(Queue<ContextScope>);
-                var nextStepScopeName = nextStep?.ExecutionContext.ScopeName;
-                while (scope != null &&
-                    !string.Equals(nextStepScopeName, scope.Name, StringComparison.OrdinalIgnoreCase) &&
-                    !(nextStepScopeName ?? string.Empty).StartsWith($"{scope.Name}.", StringComparison.OrdinalIgnoreCase))
-                {
-                    if (scopesToFinalize == null)
-                    {
-                        scopesToFinalize = new Queue<ContextScope>();
-                    }
-                    scopesToFinalize.Enqueue(scope);
-                    scope = string.IsNullOrEmpty(scope.ParentName) ? null : executionContext.Scopes[scope.ParentName];
-                }
-
-                // Finalize current and ancestor scopes
-                var stepsContext = step.ExecutionContext.StepsContext;
-                while (scopesToFinalize?.Count > 0)
-                {
-                    scope = scopesToFinalize.Dequeue();
-                    executionContext.Debug($"Finalizing scope '{scope.Name}'");
-                    executionContext.ExpressionValues["steps"] = stepsContext.GetScope(scope.Name);
-                    executionContext.ExpressionValues["inputs"] = null;
-                    var templateEvaluator = executionContext.ToPipelineTemplateEvaluator();
-                    var outputs = default(DictionaryContextData);
-                    try
-                    {
-                        outputs = templateEvaluator.EvaluateStepScopeOutputs(scope.Outputs, executionContext.ExpressionValues, executionContext.ExpressionFunctions);
-                    }
-                    catch (Exception ex)
-                    {
-                        Trace.Info($"Caught exception from finalize scope '{scope.Name}'");
-                        Trace.Error(ex);
-                        executionContext.Error(ex);
-                        executionContext.Complete(TaskResult.Failed);
-                        return;
-                    }
-
-                    if (outputs?.Count > 0)
-                    {
-                        var parentScopeName = scope.ParentName;
-                        var contextName = scope.ContextName;
-                        foreach (var pair in outputs)
-                        {
-                            var outputName = pair.Key;
-                            var outputValue = pair.Value.ToString();
-                            stepsContext.SetOutput(parentScopeName, contextName, outputName, outputValue, out var reference);
-                            executionContext.Debug($"{reference}='{outputValue}'");
-                        }
-                    }
-                }
-            }
 
             executionContext.Complete(result, resultCode: resultCode);
         }

src/Runner.Worker/action_yaml.json

@@ -7,7 +7,8 @@
                     "name": "string",
                     "description": "string",
                     "inputs": "inputs",
-                    "runs": "runs"
+                    "runs": "runs",
+                    "outputs": "outputs"
                 },
                 "loose-key-type": "non-empty-string",
                 "loose-value-type": "any"
@@ -28,11 +29,26 @@
                 "loose-value-type": "any"
             }
         },
+        "outputs": {
+            "mapping": {
+                "loose-key-type": "non-empty-string",
+                "loose-value-type": "outputs-attributes"
+            }
+        },
+        "outputs-attributes": {
+            "mapping": {
+                "properties": {
+                    "description": "string",
+                    "value": "output-value"
+                }
+            }
+        },
         "runs": {
             "one-of": [
                 "container-runs",
                 "node12-runs",
-                "plugin-runs"
+                "plugin-runs",
+                "composite-runs"
             ]
         },
         "container-runs": {
@@ -83,12 +99,56 @@
                 }
             }
         },
+        "composite-runs": {
+            "mapping": {
+                "properties": {
+                    "using": "non-empty-string",
+                    "steps": "composite-steps"
+                }
+            }
+        },
+        "composite-steps": {
+            "sequence": {
+                "item-type": "composite-step"
+            }
+        },
+        "composite-step": {
+            "mapping": {
+                "properties": {
+                    "name": "string-steps-context",
+                    "id": "non-empty-string",
+                    "run": {
+                        "type": "string-steps-context",
+                        "required": true
+                    },
+                    "env": "step-env",
+                    "working-directory": "string-steps-context",
+                    "shell": {
+                        "type": "non-empty-string",
+                        "required": true
+                    }
+                }
+            }
+        },
         "container-runs-context": {
             "context": [
                 "inputs"
             ],
             "string": {}
         },
+        "output-value": {
+            "context": [
+                "github",
+                "strategy",
+                "matrix",
+                "steps",
+                "inputs",
+                "job",
+                "runner",
+                "env"
+            ],
+            "string": {}
+        },
         "input-default-context": {
             "context": [
                 "github",
@@ -104,6 +164,37 @@
             "string": {
                 "require-non-empty": true
             }
+        },
+        "string-steps-context": {
+            "context": [
+                "github",
+                "inputs",
+                "strategy",
+                "matrix",
+                "steps",
+                "job",
+                "runner",
+                "env",
+                "hashFiles(1,255)"
+            ],
+            "string": {}
+        },
+        "step-env": {
+            "context": [
+                "github",
+                "inputs",
+                "strategy",
+                "matrix",
+                "steps",
+                "job",
+                "runner",
+                "env",
+                "hashFiles(1,255)"
+            ],
+            "mapping": {
+                "loose-key-type": "non-empty-string",
+                "loose-value-type": "string"
+            }
         }
     }
-}
+}

src/Sdk/DTGenerated/Generated/TaskHttpClientBase.cs

@@ -317,5 +317,37 @@ namespace GitHub.DistributedTask.WebApi
                 userState: userState,
                 cancellationToken: cancellationToken);
         }
+
+        /// <summary>
+        /// [Preview API] Resolves information required to download actions (URL, token) defined in an orchestration.
+        /// </summary>
+        /// <param name="scopeIdentifier">The project GUID to scope the request</param>
+        /// <param name="hubName">The name of the server hub: "build" for the Build server or "rm" for the Release Management server</param>
+        /// <param name="planId"></param>
+        /// <param name="actionReferenceList"></param>
+        /// <param name="userState"></param>
+        /// <param name="cancellationToken">The cancellation token to cancel operation.</param>
+        public virtual Task<ActionDownloadInfoCollection> ResolveActionDownloadInfoAsync(
+            Guid scopeIdentifier,
+            string hubName,
+            Guid planId,
+            ActionReferenceList actionReferenceList,
+            object userState = null,
+            CancellationToken cancellationToken = default)
+        {
+            HttpMethod httpMethod = new HttpMethod("POST");
+            Guid locationId = new Guid("27d7f831-88c1-4719-8ca1-6a061dad90eb");
+            object routeValues = new { scopeIdentifier = scopeIdentifier, hubName = hubName, planId = planId };
+            HttpContent content = new ObjectContent<ActionReferenceList>(actionReferenceList, new VssJsonMediaTypeFormatter(true));
+
+            return SendAsync<ActionDownloadInfoCollection>(
+                httpMethod,
+                locationId,
+                routeValues: routeValues,
+                version: new ApiResourceVersion(6.0, 1),
+                userState: userState,
+                cancellationToken: cancellationToken,
+                content: content);
+        }
     }
 }

src/Sdk/DTObjectTemplating/ObjectTemplating/TemplateConstants.cs

@@ -52,6 +52,7 @@ namespace GitHub.DistributedTask.ObjectTemplating
         internal const String String = "string";
         internal const String StringDefinition = "string-definition";
         internal const String StringDefinitionProperties = "string-definition-properties";
+        internal const String StringRunnerContextNoSecrets = "string-runner-context-no-secrets";
         internal const String Structure = "structure";
         internal const String TemplateSchema = "template-schema";
         internal const String True = "true";

src/Sdk/DTPipelines/Pipelines/ActionStep.cs

@@ -24,7 +24,6 @@ namespace GitHub.DistributedTask.Pipelines
             Environment = actionToClone.Environment?.Clone();
             Inputs = actionToClone.Inputs?.Clone();
             ContextName = actionToClone?.ContextName;
-            ScopeName = actionToClone?.ScopeName;
             DisplayNameToken = actionToClone.DisplayNameToken?.Clone();
         }
 
@@ -41,9 +40,6 @@ namespace GitHub.DistributedTask.Pipelines
         [DataMember(EmitDefaultValue = false)]
         public TemplateToken DisplayNameToken { get; set; }
 
-        [DataMember(EmitDefaultValue = false)]
-        public String ScopeName { get; set; }
-
         [DataMember(EmitDefaultValue = false)]
         public String ContextName { get; set; }
 

src/Sdk/DTPipelines/Pipelines/AgentJobRequestMessage.cs

@@ -39,10 +39,10 @@ namespace GitHub.DistributedTask.Pipelines
             DictionaryContextData contextData,
             WorkspaceOptions workspaceOptions,
             IEnumerable<JobStep> steps,
-            IEnumerable<ContextScope> scopes,
             IList<String> fileTable,
             TemplateToken jobOutputs,
-            IList<TemplateToken> defaults)
+            IList<TemplateToken> defaults,
+            ActionsEnvironmentReference actionsEnvironment)
         {
             this.MessageType = JobRequestMessageTypes.PipelineAgentJobRequest;
             this.Plan = plan;
@@ -55,16 +55,11 @@ namespace GitHub.DistributedTask.Pipelines
             this.Resources = jobResources;
             this.Workspace = workspaceOptions;
             this.JobOutputs = jobOutputs;
-
+            this.ActionsEnvironment = actionsEnvironment;
             m_variables = new Dictionary<String, VariableValue>(variables, StringComparer.OrdinalIgnoreCase);
             m_maskHints = new List<MaskHint>(maskHints);
             m_steps = new List<JobStep>(steps);
 
-            if (scopes != null)
-            {
-                m_scopes = new List<ContextScope>(scopes);
-            }
-
             if (environmentVariables?.Count > 0)
             {
                 m_environmentVariables = new List<TemplateToken>(environmentVariables);
@@ -234,6 +229,13 @@ namespace GitHub.DistributedTask.Pipelines
             }
         }
 
+        [DataMember(EmitDefaultValue = false)]
+        public ActionsEnvironmentReference ActionsEnvironment
+        {
+            get;
+            set;
+        }
+
         /// <summary>
         /// Gets the collection of variables associated with the current context.
         /// </summary>
@@ -261,18 +263,6 @@ namespace GitHub.DistributedTask.Pipelines
             }
         }
 
-        public IList<ContextScope> Scopes
-        {
-            get
-            {
-                if (m_scopes == null)
-                {
-                    m_scopes = new List<ContextScope>();
-                }
-                return m_scopes;
-            }
-        }
-
         /// <summary>
         /// Gets the table of files used when parsing the pipeline (e.g. yaml files)
         /// </summary>
@@ -415,11 +405,6 @@ namespace GitHub.DistributedTask.Pipelines
                 m_maskHints = new List<MaskHint>(this.m_maskHints.Distinct());
             }
 
-            if (m_scopes?.Count == 0)
-            {
-                m_scopes = null;
-            }
-
             if (m_variables?.Count == 0)
             {
                 m_variables = null;
@@ -447,9 +432,6 @@ namespace GitHub.DistributedTask.Pipelines
         [DataMember(Name = "Steps", EmitDefaultValue = false)]
         private List<JobStep> m_steps;
 
-        [DataMember(Name = "Scopes", EmitDefaultValue = false)]
-        private List<ContextScope> m_scopes;
-
         [DataMember(Name = "Variables", EmitDefaultValue = false)]
         private IDictionary<String, VariableValue> m_variables;
 

src/Sdk/DTPipelines/Pipelines/ContextData/NumberContextData.cs

@@ -42,7 +42,12 @@ namespace GitHub.DistributedTask.Pipelines.ContextData
             var floored = Math.Floor(m_value);
             if (m_value == floored && m_value <= (Double)Int32.MaxValue && m_value >= (Double)Int32.MinValue)
             {
-                Int32 flooredInt = (Int32)floored;
+                var flooredInt = (Int32)floored;
+                return (JToken)flooredInt;
+            }
+            else if (m_value == floored && m_value <= (Double)Int64.MaxValue && m_value >= (Double)Int64.MinValue)
+            {
+                var flooredInt = (Int64)floored;
                 return (JToken)flooredInt;
             }
             else

src/Sdk/DTPipelines/Pipelines/ContextScope.cs

@@ -1,53 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Runtime.Serialization;
-using GitHub.DistributedTask.ObjectTemplating.Tokens;
-using Newtonsoft.Json;
-
-namespace GitHub.DistributedTask.Pipelines
-{
-    [DataContract]
-    [EditorBrowsable(EditorBrowsableState.Never)]
-    public sealed class ContextScope
-    {
-        [DataMember(EmitDefaultValue = false)]
-        public String Name { get; set; }
-
-        [IgnoreDataMember]
-        public String ContextName
-        {
-            get
-            {
-                var index = Name.LastIndexOf('.');
-                if (index >= 0)
-                {
-                    return Name.Substring(index + 1);
-                }
-
-                return Name;
-            }
-        }
-
-        [IgnoreDataMember]
-        public String ParentName
-        {
-            get
-            {
-                var index = Name.LastIndexOf('.');
-                if (index >= 0)
-                {
-                    return Name.Substring(0, index);
-                }
-
-                return String.Empty;
-            }
-        }
-
-        [DataMember(EmitDefaultValue = false)]
-        public TemplateToken Inputs { get; set; }
-
-        [DataMember(EmitDefaultValue = false)]
-        public TemplateToken Outputs { get; set; }
-    }
-}