Update ldd check with dotnet 5.

From February 2021, in order to provide feedback on pull requests, Code Scanning workflows must be configured with both `push` and `pull_request` triggers. This is because Code Scanning compares the results from a pull request against the results for the base branch to tell you only what has changed between the two.

Early in the beta period we supported displaying results on pull requests for workflows with only `push` triggers, but have discontinued support as this proved to be less robust.

See https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#scanning-pull-requests for more information on how best to configure your Code Scanning workflows.

.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/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

@@ -16,11 +16,32 @@ We don't want the workflow author to need to know how the internal workings of t
 
 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`
@@ -49,7 +70,9 @@ runs:
   using: "composite"
   steps:
     - run: pip install -r requirements.txt
+      shell: bash
     - run: npm install
+      shell: bash
 ```
 
 Example Output
@@ -63,6 +86,69 @@ 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`:
@@ -86,6 +172,7 @@ runs:
   using: "composite"
   steps: 
     - run: echo hello ${{ inputs.your_name }}
+      shell: bash
 ```
 
 Example Output:
@@ -106,6 +193,7 @@ steps:
   - id: foo
     uses: user/composite@v1
   - run: echo random-number ${{ steps.foo.outputs.random-number }} 
+    shell: bash
 ```
 
 Example `user/composite/action.yml`:
@@ -119,7 +207,8 @@ runs:
   using: "composite"
   steps: 
     - id: random-number-generator
-      run: echo "::set-output name=random-number::$(echo $RANDOM)"
+      run: echo "::set-output name=random-id::$(echo $RANDOM)"
+      shell: bash
 ```
 
 Example Output:
@@ -143,13 +232,17 @@ In the Composite Action, you'll only be able to use `::set-env::` to set environ
 
 ### Secrets
 
-**Note** : This feature will be focused on in a future ADR.
+**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
@@ -166,12 +259,18 @@ 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()`.
@@ -203,13 +302,18 @@ runs:
     - 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).
@@ -243,36 +347,17 @@ runs:
   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. 
 
-### 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. These attributes are optional for each run step - by default, the `shell` is set to whatever default value is associated with the runner os (ex: bash =\> Mac). 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).
-
 ### 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. 
 

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)

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

@@ -1,15 +1,17 @@
 ## Features
-  - Composite Actions Support for Multiple Run Steps (#549, #557, #564, #568, #569, #578, #591, #599, #605, #609, #610, #615, #624) 
+  - Support config runner via GitHub PAT. (#874)
-  - Prepare to switch GITHUB_ACTION to use ContextName instead of refname (#593)
+  - Update runner to .NET 5 (#799)
-  - Fold logs for intermediate docker commands (#608)
+  - Add new ANDROID_SDK_ROOT environment variable (#892)
-  - Add ability to register a runner to the non-default self-hosted runner group (#613)
+  - Add warning when running out of disk. (#873)
-  
+  - Always use FIPS Cryptography (#896)
+  - Add `--check` to run a serials network test against GitHub or GHES. (#900)
+
 ## Bugs
-  - Double quotes around variable so CD works if path contains spaces (#602)
+  - Ignore certain scenarios so they are not counted as infra failures (#889)
-  - Bump lodash in /src/Misc/expressionFunc/hashFiles (#603) 
+
-  - Fix poor performance of process spawned from svc daemon (#614)
 ## Misc
-  - Move shared ExecutionContext properties under .Global (#594)
+  - Add runner e2e test workflow (#885)
+  - Add on: pull_request trigger to CodeQL workflow (#907)
 
 ## 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>
+2.276.0

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
@@ -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

@@ -69,6 +69,8 @@
 .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 +98,7 @@ param(
    [string]$FeedCredential,
    [string]$ProxyAddress,
    [switch]$ProxyUseDefaultCredentials,
+   [string[]]$ProxyBypassList=@(),
    [switch]$SkipNonVersionedFiles,
    [switch]$NoCdn
 )
@@ -119,11 +122,27 @@ $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-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($Invocation) {
@@ -176,7 +195,7 @@ function Get-CLIArchitecture-From-Architecture([string]$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" }
     }
 }
 
@@ -237,7 +256,11 @@ 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 $HttpClientHandler
             }
             else {
@@ -372,17 +395,20 @@ function Get-Specific-Version-From-Version([string]$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"
@@ -390,7 +416,7 @@ 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]$CLIArchitecture) {
@@ -411,6 +437,51 @@ function Get-LegacyDownload-Link([string]$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
 
@@ -564,9 +635,14 @@ 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 $InstallDir
@@ -592,6 +668,11 @@ if ($DryRun) {
         }
     }
     Say "Repeatable invocation: $RepeatableCommand"
+    if ($SpecificVersion -ne $EffectiveVersion)
+    {
+        Say "NOTE: Due to finding a version manifest with this runtime, it would actually install with version '$EffectiveVersion'"
+    }
+
     exit 0
 }
 
@@ -615,6 +696,12 @@ 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) {
@@ -691,14 +778,15 @@ Remove-Item $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
-# MIIjhwYJKoZIhvcNAQcCoIIjeDCCI3QCAQExDzANBglghkgBZQMEAgEFADB5Bgor
+# MIIjlgYJKoZIhvcNAQcCoIIjhzCCI4MCAQExDzANBglghkgBZQMEAgEFADB5Bgor
 # BgEEAYI3AgEEoGswaTA0BgorBgEEAYI3AgEeMCYCAwEAAAQQH8w7YFlLCE63JNLG
-# KX7zUQIBAAIBAAIBAAIBAAIBADAxMA0GCWCGSAFlAwQCAQUABCAiKYSY4KtkeThH
+# KX7zUQIBAAIBAAIBAAIBAAIBADAxMA0GCWCGSAFlAwQCAQUABCA+isugNMwZSGLd
-# d5M1aXqv1K0/pff07QwfUbYZ/qX5LqCCDYUwggYDMIID66ADAgECAhMzAAABiK9S
+# kfBd0C2Ud//U2Nbj31s1jg3Yf9gh4KCCDYUwggYDMIID66ADAgECAhMzAAABiK9S
 # 1rmSbej5AAAAAAGIMA0GCSqGSIb3DQEBCwUAMH4xCzAJBgNVBAYTAlVTMRMwEQYD
 # VQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNy
 # b3NvZnQgQ29ycG9yYXRpb24xKDAmBgNVBAMTH01pY3Jvc29mdCBDb2RlIFNpZ25p
@@ -770,119 +858,119 @@ exit 0
 # BL7fQccOKO7eZS/sl/ahXJbYANahRr1Z85elCUtIEJmAH9AAKcWxm6U/RXceNcbS
 # oqKfenoi+kiVH6v7RyOA9Z74v2u3S5fi63V4GuzqN5l5GEv/1rMjaHXmr/r8i+sL
 # gOppO6/8MO0ETI7f33VtY5E90Z1WTk+/gFcioXgRMiF670EKsT/7qMykXcGhiJtX
-# cVZOSEXAQsmbdlsKgEhr/Xmfwb1tbWrJUnMTDXpQzTGCFVgwghVUAgEBMIGVMH4x
+# cVZOSEXAQsmbdlsKgEhr/Xmfwb1tbWrJUnMTDXpQzTGCFWcwghVjAgEBMIGVMH4x
 # CzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRt
 # b25kMR4wHAYDVQQKExVNaWNyb3NvZnQgQ29ycG9yYXRpb24xKDAmBgNVBAMTH01p
 # Y3Jvc29mdCBDb2RlIFNpZ25pbmcgUENBIDIwMTECEzMAAAGIr1LWuZJt6PkAAAAA
 # AYgwDQYJYIZIAWUDBAIBBQCgga4wGQYJKoZIhvcNAQkDMQwGCisGAQQBgjcCAQQw
-# HAYKKwYBBAGCNwIBCzEOMAwGCisGAQQBgjcCARUwLwYJKoZIhvcNAQkEMSIEIFxZ
+# HAYKKwYBBAGCNwIBCzEOMAwGCisGAQQBgjcCARUwLwYJKoZIhvcNAQkEMSIEIK4I
-# Yezh3liQqiGQuXNa+zYfoSIbLqOpdEn2ZKskBkisMEIGCisGAQQBgjcCAQwxNDAy
+# CDH7/r/eeMqTtDETJ67ogfneVRo0/P6ogV2vy4tXMEIGCisGAQQBgjcCAQwxNDAy
 # oBSAEgBNAGkAYwByAG8AcwBvAGYAdKEagBhodHRwOi8vd3d3Lm1pY3Jvc29mdC5j
-# b20wDQYJKoZIhvcNAQEBBQAEggEAjLUrwCXJCPHZulZuKAQSX+MfnIRFAhlN7ru2
+# b20wDQYJKoZIhvcNAQEBBQAEggEAOnmVmILEjI6ZiuuSOvvTvijidkBez61Vz97A
-# 6H8rudvhkWgqMISkLb9gFDPR5FhR4sqdYgKW4P0ERao9ypCGi1FWDLqygC2XBbHj
+# jV3AOsfmUvLpVaTVa1Mt2iPDuq1QLqRPaT7BD8PAUwr91pYllVgEd8NqivCIaCZg
-# NEQHBxHJs5SMsMAXNSIcYHqVAvhF3nXoseaNBkhOTrkQ1FS/fW7AfDGRbsiiESzv
+# QyIRiTmHQxbozWsLcjxMvX2VxSmNKDw7IOHzUbXtmiEGhygyZpdh/uiCj7ziSxp3
-# lebf92shZylBFKOsKQLAL0mF/B7xrxHJIj5dgQoD1phATRNHOEQj3jgmkidFWowV
+# lQBR8mUE1NL9dxaxKWLhGeORqAepw6nId9oO+mHRh4JRK7uqZOFAES7/21M9vPZi
-# 4r8MzbxRhAEORbnJexlUoDQJQH3YwxuUyXkTvrYMTKSbGJLlwRaZQbrcBU0k4gCH
+# XYilJLgIoyMkvqYSdoouzn6+m74kgzkNkyK9GYz2mmO2BCMnai9Njze2d0+kY+37
-# y8Sci+p9Rq+aOTzLCoNrZyh9E7OdwVDm1FJAtY30bV50T2WSFKGCEuIwghLeBgor
+# kt10BmJDw3FHaZ+/fH/TMTgo0ZcAOicP9ccdIh/CzzpU52o+Q6GCEvEwghLtBgor
-# BgEEAYI3AwMBMYISzjCCEsoGCSqGSIb3DQEHAqCCErswghK3AgEDMQ8wDQYJYIZI
+# BgEEAYI3AwMBMYIS3TCCEtkGCSqGSIb3DQEHAqCCEsowghLGAgEDMQ8wDQYJYIZI
-# AWUDBAIBBQAwggFRBgsqhkiG9w0BCRABBKCCAUAEggE8MIIBOAIBAQYKKwYBBAGE
+# AWUDBAIBBQAwggFVBgsqhkiG9w0BCRABBKCCAUQEggFAMIIBPAIBAQYKKwYBBAGE
-# WQoDATAxMA0GCWCGSAFlAwQCAQUABCD7JNcBBSfhlKPL1tN3CEKRKJuT/dZ8RO9K
+# WQoDATAxMA0GCWCGSAFlAwQCAQUABCBSbhMJwNER+BICn3iLUnPrP8dptyUphcFC
-# orYLXJeLTwIGXvN89YD7GBMyMDIwMDcwMTE0MTYyMC40MDVaMASAAgH0oIHQpIHN
+# A/NsIgnPLwIGX4hEzP6WGBMyMDIwMTEwOTE0NDY1Mi4yMzNaMASAAgH0oIHUpIHR
-# MIHKMQswCQYDVQQGEwJVUzELMAkGA1UECBMCV0ExEDAOBgNVBAcTB1JlZG1vbmQx
+# MIHOMQswCQYDVQQGEwJVUzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMH
-# HjAcBgNVBAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEtMCsGA1UECxMkTWljcm9z
+# UmVkbW9uZDEeMBwGA1UEChMVTWljcm9zb2Z0IENvcnBvcmF0aW9uMSkwJwYDVQQL
-# b2Z0IElyZWxhbmQgT3BlcmF0aW9ucyBMaW1pdGVkMSYwJAYDVQQLEx1UaGFsZXMg
+# EyBNaWNyb3NvZnQgT3BlcmF0aW9ucyBQdWVydG8gUmljbzEmMCQGA1UECxMdVGhh
-# VFNTIEVTTjoxNzlFLTRCQjAtODI0NjElMCMGA1UEAxMcTWljcm9zb2Z0IFRpbWUt
+# bGVzIFRTUyBFU046MEE1Ni1FMzI5LTRENEQxJTAjBgNVBAMTHE1pY3Jvc29mdCBU
-# U3RhbXAgU2VydmljZaCCDjkwggTxMIID2aADAgECAhMzAAABDKp4btzMQkzBAAAA
+# aW1lLVN0YW1wIFNlcnZpY2Wggg5EMIIE9TCCA92gAwIBAgITMwAAAScvbqPvkagZ
-# AAEMMA0GCSqGSIb3DQEBCwUAMHwxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpXYXNo
+# qAAAAAABJzANBgkqhkiG9w0BAQsFADB8MQswCQYDVQQGEwJVUzETMBEGA1UECBMK
-# aW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNyb3NvZnQgQ29y
+# V2FzaGluZ3RvbjEQMA4GA1UEBxMHUmVkbW9uZDEeMBwGA1UEChMVTWljcm9zb2Z0
-# cG9yYXRpb24xJjAkBgNVBAMTHU1pY3Jvc29mdCBUaW1lLVN0YW1wIFBDQSAyMDEw
+# IENvcnBvcmF0aW9uMSYwJAYDVQQDEx1NaWNyb3NvZnQgVGltZS1TdGFtcCBQQ0Eg
-# MB4XDTE5MTAyMzIzMTkxNloXDTIxMDEyMTIzMTkxNlowgcoxCzAJBgNVBAYTAlVT
+# MjAxMDAeFw0xOTEyMTkwMTE0NTlaFw0yMTAzMTcwMTE0NTlaMIHOMQswCQYDVQQG
-# MQswCQYDVQQIEwJXQTEQMA4GA1UEBxMHUmVkbW9uZDEeMBwGA1UEChMVTWljcm9z
+# EwJVUzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMHUmVkbW9uZDEeMBwG
-# b2Z0IENvcnBvcmF0aW9uMS0wKwYDVQQLEyRNaWNyb3NvZnQgSXJlbGFuZCBPcGVy
+# A1UEChMVTWljcm9zb2Z0IENvcnBvcmF0aW9uMSkwJwYDVQQLEyBNaWNyb3NvZnQg
-# YXRpb25zIExpbWl0ZWQxJjAkBgNVBAsTHVRoYWxlcyBUU1MgRVNOOjE3OUUtNEJC
+# T3BlcmF0aW9ucyBQdWVydG8gUmljbzEmMCQGA1UECxMdVGhhbGVzIFRTUyBFU046
-# MC04MjQ2MSUwIwYDVQQDExxNaWNyb3NvZnQgVGltZS1TdGFtcCBTZXJ2aWNlMIIB
+# MEE1Ni1FMzI5LTRENEQxJTAjBgNVBAMTHE1pY3Jvc29mdCBUaW1lLVN0YW1wIFNl
-# IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq5011+XqVJmQKtiw39igeEMv
+# cnZpY2UwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQD4Ad5xEZ5On0uN
-# CLcZ1forbmxsDkpnCN1SrThKI+n2Pr3zqTzJVgdJFCoKm1ks1gtRJ7HaL6tDkrOw
+# L71ng9xwoDPRKeMUyEIj5yVxPRPh5GVbU7D3pqDsoXzQMhfeRP61L1zlU1HCRS+1
-# 8XJmfJaxyQAluCQ+e40NI+A4w+u59Gy89AVY5lJNrmCva6gozfg1kxw6abV5WWr+
+# 29eo0yj1zjbAlmPAwosUgyIonesWt9E4hFlXCGUcIg5XMdvQ+Ouzk2r+awNRuk8A
-# PjEpNCshO4hxv3UqgMcCKnT2YVSZzF1Gy7APub1fY0P1vNEuOFKrNCEEvWIKRrqs
+# BGOa0I4VBy6zqCYHyX2pGauiB43frJSNP6pcrO0CBmpBZNjgepof5Z/50vBuJDUS
-# eyBB73G8KD2yw6jfz0VKxNSRAdhJV/ghOyrDt5a+L6C3m1rpr8sqiof3iohv3ANI
+# ug6OIMQ7ZwUhSzX4bEmZUUjAycBb62dhQpGqHsXe6ypVDTgAEnGONdSBKkHiNT8H
-# gNqw6ex+4+G+B7JMbIHbGpPdebedL6ePbuBCnbgJoDn340k0aw6ij21GvvUnkQID
+# 0Zt2lm0vCLwHyTwtgIdi67T/LCp+X2mlPHqXsY3u72X3GYn/3G8YFCkrSc6m3b0w
-# AQABo4IBGzCCARcwHQYDVR0OBBYEFAlCOq9DDIa0A0oqgKtM5vjuZeK+MB8GA1Ud
+# TXPd5/2fAgMBAAGjggEbMIIBFzAdBgNVHQ4EFgQU5fSWVYBfOTEkW2JTiV24WNNt
-# IwQYMBaAFNVjOlyKMZDzQ3t8RhvFM2hahW1VMFYGA1UdHwRPME0wS6BJoEeGRWh0
+# lfIwHwYDVR0jBBgwFoAU1WM6XIoxkPNDe3xGG8UzaFqFbVUwVgYDVR0fBE8wTTBL
-# dHA6Ly9jcmwubWljcm9zb2Z0LmNvbS9wa2kvY3JsL3Byb2R1Y3RzL01pY1RpbVN0
+# oEmgR4ZFaHR0cDovL2NybC5taWNyb3NvZnQuY29tL3BraS9jcmwvcHJvZHVjdHMv
-# YVBDQV8yMDEwLTA3LTAxLmNybDBaBggrBgEFBQcBAQROMEwwSgYIKwYBBQUHMAKG
+# TWljVGltU3RhUENBXzIwMTAtMDctMDEuY3JsMFoGCCsGAQUFBwEBBE4wTDBKBggr
-# Pmh0dHA6Ly93d3cubWljcm9zb2Z0LmNvbS9wa2kvY2VydHMvTWljVGltU3RhUENB
+# BgEFBQcwAoY+aHR0cDovL3d3dy5taWNyb3NvZnQuY29tL3BraS9jZXJ0cy9NaWNU
-# XzIwMTAtMDctMDEuY3J0MAwGA1UdEwEB/wQCMAAwEwYDVR0lBAwwCgYIKwYBBQUH
+# aW1TdGFQQ0FfMjAxMC0wNy0wMS5jcnQwDAYDVR0TAQH/BAIwADATBgNVHSUEDDAK
-# AwgwDQYJKoZIhvcNAQELBQADggEBAET3xBg/IZ9zdOfwbDGK7cK3qKYt/qUOlbRB
+# BggrBgEFBQcDCDANBgkqhkiG9w0BAQsFAAOCAQEACsqNfNFVxwalZ42cEMuzZc12
-# zgeNjb32K86nGeRGkBee10dVOEGWUw6KtBeWh1LQ70b64/tLtiLcsf9JzaAyDYb1
+# 6Nvluanx8UewDVeUQZEZHRmppMFHAzS/g6RzmxTyR2tKE3mChNGW5dTL730vEbRh
-# sRmMi5fjRZ753TquaT8V7NJ7RfEuYfvZlubfQD0MVbU4tzsdZdYuxE37V2J9pN89
+# nYRmBgiX/gT3f4AQrOPnZGXY7zszcrlbgzxpakOX+x0u4rkP3Ashh3B2CdJ11XsB
-# j7GoFNtAnSnCn1MRxENAILgt9XzeQzTEDhFYW0N2DNphTkRPXGjpDmwi6WtkJ5fv
+# di5PiZa1spB6U5S8D15gqTUfoIniLT4v1DBdkWExsKI1vsiFcDcjGJ4xRlMRF+fw
-# 0iTyB4dwEC+/ed0lGbFLcytJoMwfTNMdH6gcnHlMzsniornGFZa5PPiV78XoZ9Fe
+# 7SY0WZoOzwRzKxDTdg4DusAXpaeKbch9iithLFk/vIxQrqCr/niW8tEA+eSzeX/E
-# upKo8ZKNGhLLLB5GTtqfHex5no3ioVSq+NthvhX0I/V+iXJsopowggZxMIIEWaAD
+# q1D0ZyvOn4e2lTnwoJUKH6OQAWSBogyK4OCbFeJOqdKAUiBTgHKkQIYh/tbKQjCC
-# AgECAgphCYEqAAAAAAACMA0GCSqGSIb3DQEBCwUAMIGIMQswCQYDVQQGEwJVUzET
+# BnEwggRZoAMCAQICCmEJgSoAAAAAAAIwDQYJKoZIhvcNAQELBQAwgYgxCzAJBgNV
-# MBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMHUmVkbW9uZDEeMBwGA1UEChMV
+# BAYTAlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4w
-# TWljcm9zb2Z0IENvcnBvcmF0aW9uMTIwMAYDVQQDEylNaWNyb3NvZnQgUm9vdCBD
+# HAYDVQQKExVNaWNyb3NvZnQgQ29ycG9yYXRpb24xMjAwBgNVBAMTKU1pY3Jvc29m
-# ZXJ0aWZpY2F0ZSBBdXRob3JpdHkgMjAxMDAeFw0xMDA3MDEyMTM2NTVaFw0yNTA3
+# dCBSb290IENlcnRpZmljYXRlIEF1dGhvcml0eSAyMDEwMB4XDTEwMDcwMTIxMzY1
-# MDEyMTQ2NTVaMHwxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAw
+# NVoXDTI1MDcwMTIxNDY1NVowfDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCldhc2hp
-# DgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNyb3NvZnQgQ29ycG9yYXRpb24x
+# bmd0b24xEDAOBgNVBAcTB1JlZG1vbmQxHjAcBgNVBAoTFU1pY3Jvc29mdCBDb3Jw
-# JjAkBgNVBAMTHU1pY3Jvc29mdCBUaW1lLVN0YW1wIFBDQSAyMDEwMIIBIjANBgkq
+# b3JhdGlvbjEmMCQGA1UEAxMdTWljcm9zb2Z0IFRpbWUtU3RhbXAgUENBIDIwMTAw
-# hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqR0NvHcRijog7PwTl/X6f2mUa3RUENWl
+# ggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCpHQ28dxGKOiDs/BOX9fp/
-# CgCChfvtfGhLLF/Fw+Vhwna3PmYrW/AVUycEMR9BGxqVHc4JE458YTBZsTBED/Fg
+# aZRrdFQQ1aUKAIKF++18aEssX8XD5WHCdrc+Zitb8BVTJwQxH0EbGpUdzgkTjnxh
-# iIRUQwzXTbg4CLNC3ZOs1nMwVyaCo0UN0Or1R4HNvyRgMlhgRvJYR4YyhB50YWeR
+# MFmxMEQP8WCIhFRDDNdNuDgIs0Ldk6zWczBXJoKjRQ3Q6vVHgc2/JGAyWGBG8lhH
-# X4FUsc+TTJLBxKZd0WETbijGGvmGgLvfYfxGwScdJGcSchohiq9LZIlQYrFd/Xcf
+# hjKEHnRhZ5FfgVSxz5NMksHEpl3RYRNuKMYa+YaAu99h/EbBJx0kZxJyGiGKr0tk
-# PfBXday9ikJNQFHRD5wGPmd/9WbAA5ZEfu/QS/1u5ZrKsajyeioKMfDaTgaRtogI
+# iVBisV39dx898Fd1rL2KQk1AUdEPnAY+Z3/1ZsADlkR+79BL/W7lmsqxqPJ6Kgox
-# Neh4HLDpmc085y9Euqf03GS9pAHBIAmTeM38vMDJRF1eFpwBBU8iTQIDAQABo4IB
+# 8NpOBpG2iAg16HgcsOmZzTznL0S6p/TcZL2kAcEgCZN4zfy8wMlEXV4WnAEFTyJN
-# 5jCCAeIwEAYJKwYBBAGCNxUBBAMCAQAwHQYDVR0OBBYEFNVjOlyKMZDzQ3t8RhvF
+# AgMBAAGjggHmMIIB4jAQBgkrBgEEAYI3FQEEAwIBADAdBgNVHQ4EFgQU1WM6XIox
-# M2hahW1VMBkGCSsGAQQBgjcUAgQMHgoAUwB1AGIAQwBBMAsGA1UdDwQEAwIBhjAP
+# kPNDe3xGG8UzaFqFbVUwGQYJKwYBBAGCNxQCBAweCgBTAHUAYgBDAEEwCwYDVR0P
-# BgNVHRMBAf8EBTADAQH/MB8GA1UdIwQYMBaAFNX2VsuP6KJcYmjRPZSQW9fOmhjE
+# BAQDAgGGMA8GA1UdEwEB/wQFMAMBAf8wHwYDVR0jBBgwFoAU1fZWy4/oolxiaNE9
-# MFYGA1UdHwRPME0wS6BJoEeGRWh0dHA6Ly9jcmwubWljcm9zb2Z0LmNvbS9wa2kv
+# lJBb186aGMQwVgYDVR0fBE8wTTBLoEmgR4ZFaHR0cDovL2NybC5taWNyb3NvZnQu
-# Y3JsL3Byb2R1Y3RzL01pY1Jvb0NlckF1dF8yMDEwLTA2LTIzLmNybDBaBggrBgEF
+# Y29tL3BraS9jcmwvcHJvZHVjdHMvTWljUm9vQ2VyQXV0XzIwMTAtMDYtMjMuY3Js
-# BQcBAQROMEwwSgYIKwYBBQUHMAKGPmh0dHA6Ly93d3cubWljcm9zb2Z0LmNvbS9w
+# MFoGCCsGAQUFBwEBBE4wTDBKBggrBgEFBQcwAoY+aHR0cDovL3d3dy5taWNyb3Nv
-# a2kvY2VydHMvTWljUm9vQ2VyQXV0XzIwMTAtMDYtMjMuY3J0MIGgBgNVHSABAf8E
+# ZnQuY29tL3BraS9jZXJ0cy9NaWNSb29DZXJBdXRfMjAxMC0wNi0yMy5jcnQwgaAG
-# gZUwgZIwgY8GCSsGAQQBgjcuAzCBgTA9BggrBgEFBQcCARYxaHR0cDovL3d3dy5t
+# A1UdIAEB/wSBlTCBkjCBjwYJKwYBBAGCNy4DMIGBMD0GCCsGAQUFBwIBFjFodHRw
-# aWNyb3NvZnQuY29tL1BLSS9kb2NzL0NQUy9kZWZhdWx0Lmh0bTBABggrBgEFBQcC
+# Oi8vd3d3Lm1pY3Jvc29mdC5jb20vUEtJL2RvY3MvQ1BTL2RlZmF1bHQuaHRtMEAG
-# AjA0HjIgHQBMAGUAZwBhAGwAXwBQAG8AbABpAGMAeQBfAFMAdABhAHQAZQBtAGUA
+# CCsGAQUFBwICMDQeMiAdAEwAZQBnAGEAbABfAFAAbwBsAGkAYwB5AF8AUwB0AGEA
-# bgB0AC4gHTANBgkqhkiG9w0BAQsFAAOCAgEAB+aIUQ3ixuCYP4FxAz2do6Ehb7Pr
+# dABlAG0AZQBuAHQALiAdMA0GCSqGSIb3DQEBCwUAA4ICAQAH5ohRDeLG4Jg/gXED
-# psz1Mb7PBeKp/vpXbRkws8LFZslq3/Xn8Hi9x6ieJeP5vO1rVFcIK1GCRBL7uVOM
+# PZ2joSFvs+umzPUxvs8F4qn++ldtGTCzwsVmyWrf9efweL3HqJ4l4/m87WtUVwgr
-# zPRgEop2zEBAQZvcXBf/XPleFzWYJFZLdO9CEMivv3/Gf/I3fVo/HPKZeUqRUgCv
+# UYJEEvu5U4zM9GASinbMQEBBm9xcF/9c+V4XNZgkVkt070IQyK+/f8Z/8jd9Wj8c
-# OA8X9S95gWXZqbVr5MfO9sp6AG9LMEQkIjzP7QOllo9ZKby2/QThcJ8ySif9Va8v
+# 8pl5SpFSAK84Dxf1L3mBZdmptWvkx872ynoAb0swRCQiPM/tA6WWj1kpvLb9BOFw
-# /rbljjO7Yl+a21dA6fHOmWaQjP9qYn/dxUoLkSbiOewZSnFjnXshbcOco6I8+n99
+# nzJKJ/1Vry/+tuWOM7tiX5rbV0Dp8c6ZZpCM/2pif93FSguRJuI57BlKcWOdeyFt
-# lmqQeKZt0uGc+R38ONiU9MalCpaGpL2eGq4EQoO4tYCbIjggtSXlZOz39L9+Y1kl
+# w5yjojz6f32WapB4pm3S4Zz5Hfw42JT0xqUKloakvZ4argRCg7i1gJsiOCC1JeVk
-# D3ouOVd2onGqBooPiRa6YacRy5rYDkeagMXQzafQ732D8OE7cQnfXXSYIghh2rBQ
+# 7Pf0v35jWSUPei45V3aicaoGig+JFrphpxHLmtgOR5qAxdDNp9DvfYPw4TtxCd9d
-# Hm+98eEA3+cxB6STOvdlR3jo+KhIq/fecn5ha293qYHLpwmsObvsxsvYgrRyzR30
+# dJgiCGHasFAeb73x4QDf5zEHpJM692VHeOj4qEir995yfmFrb3epgcunCaw5u+zG
-# uIUBHoD7G4kqVDmyW9rIDVWZeodzOwjmmC3qjeAzLhIp9cAvVCch98isTtoouLGp
+# y9iCtHLNHfS4hQEegPsbiSpUObJb2sgNVZl6h3M7COaYLeqN4DMuEin1wC9UJyH3
-# 25ayp0Kiyc8ZQU3ghvkqmqMRZjDTu3QyS99je/WZii8bxyGvWbWu3EQ8l1Bx16HS
+# yKxO2ii4sanblrKnQqLJzxlBTeCG+SqaoxFmMNO7dDJL32N79ZmKLxvHIa9Zta7c
-# xVXjad5XwdHeMMD9zOZN+w2/XU/pnR4ZOC+8z1gFLu8NoFA12u8JJxzVs341Hgi6
+# RDyXUHHXodLFVeNp3lfB0d4wwP3M5k37Db9dT+mdHhk4L7zPWAUu7w2gUDXa7wkn
-# 2jbb01+P3nSISRKhggLLMIICNAIBATCB+KGB0KSBzTCByjELMAkGA1UEBhMCVVMx
+# HNWzfjUeCLraNtvTX4/edIhJEqGCAtIwggI7AgEBMIH8oYHUpIHRMIHOMQswCQYD
-# CzAJBgNVBAgTAldBMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNyb3Nv
+# VQQGEwJVUzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMHUmVkbW9uZDEe
-# ZnQgQ29ycG9yYXRpb24xLTArBgNVBAsTJE1pY3Jvc29mdCBJcmVsYW5kIE9wZXJh
+# MBwGA1UEChMVTWljcm9zb2Z0IENvcnBvcmF0aW9uMSkwJwYDVQQLEyBNaWNyb3Nv
-# dGlvbnMgTGltaXRlZDEmMCQGA1UECxMdVGhhbGVzIFRTUyBFU046MTc5RS00QkIw
+# ZnQgT3BlcmF0aW9ucyBQdWVydG8gUmljbzEmMCQGA1UECxMdVGhhbGVzIFRTUyBF
-# LTgyNDYxJTAjBgNVBAMTHE1pY3Jvc29mdCBUaW1lLVN0YW1wIFNlcnZpY2WiIwoB
+# U046MEE1Ni1FMzI5LTRENEQxJTAjBgNVBAMTHE1pY3Jvc29mdCBUaW1lLVN0YW1w
-# ATAHBgUrDgMCGgMVAMsg9FQ9pgPLXI2Ld5z7xDS0QAZ9oIGDMIGApH4wfDELMAkG
+# IFNlcnZpY2WiIwoBATAHBgUrDgMCGgMVALOVuE5sgxzETO4s+poBqI6r1x8zoIGD
-# A1UEBhMCVVMxEzARBgNVBAgTCldhc2hpbmd0b24xEDAOBgNVBAcTB1JlZG1vbmQx
+# MIGApH4wfDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCldhc2hpbmd0b24xEDAOBgNV
-# HjAcBgNVBAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEmMCQGA1UEAxMdTWljcm9z
+# BAcTB1JlZG1vbmQxHjAcBgNVBAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEmMCQG
-# b2Z0IFRpbWUtU3RhbXAgUENBIDIwMTAwDQYJKoZIhvcNAQEFBQACBQDipo0MMCIY
+# A1UEAxMdTWljcm9zb2Z0IFRpbWUtU3RhbXAgUENBIDIwMTAwDQYJKoZIhvcNAQEF
-# DzIwMjAwNzAxMTIxODIwWhgPMjAyMDA3MDIxMjE4MjBaMHQwOgYKKwYBBAGEWQoE
+# BQACBQDjU7byMCIYDzIwMjAxMTA5MTYzOTE0WhgPMjAyMDExMTAxNjM5MTRaMHcw
-# ATEsMCowCgIFAOKmjQwCAQAwBwIBAAICE70wBwIBAAICEeIwCgIFAOKn3owCAQAw
+# PQYKKwYBBAGEWQoEATEvMC0wCgIFAONTtvICAQAwCgIBAAICIt0CAf8wBwIBAAIC
-# NgYKKwYBBAGEWQoEAjEoMCYwDAYKKwYBBAGEWQoDAqAKMAgCAQACAwehIKEKMAgC
+# EcQwCgIFAONVCHICAQAwNgYKKwYBBAGEWQoEAjEoMCYwDAYKKwYBBAGEWQoDAqAK
-# AQACAwGGoDANBgkqhkiG9w0BAQUFAAOBgQCOPjlHOH8nYtgt2XnpKXenxPUR03ED
+# MAgCAQACAwehIKEKMAgCAQACAwGGoDANBgkqhkiG9w0BAQUFAAOBgQAQhyIIAC/A
-# xPBm8XR5Z1vIq53RU9jG6yYcYNTdK+q38SGZtu0W/SgagTfKCQhjhRakuv7rGSs2
+# P+VJdbhL9IQgm8WTa1DmPPE+BQSuRbBy2MmzC1KostixdEkr2OaNSjcYuZBNIJgv
-# dlhx9LGCoc/q1vqmZpRSjkqWVcc/NzmldUWIWnLlV6rmLGoDmfCH5BcsiU6Eo6wU
+# vE8CWhVDD+sbBpVcOdoSfoBwHXKfvqSTiWvovoexkF0X5aon7yr3PkJ/kEqoLyUM
-# iUVwnnXoqsCaBzGCAw0wggMJAgEBMIGTMHwxCzAJBgNVBAYTAlVTMRMwEQYDVQQI
+# xRvdWKJdHOL1sT0/aWHn048c6aGin/zc8DGCAw0wggMJAgEBMIGTMHwxCzAJBgNV
-# EwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4wHAYDVQQKExVNaWNyb3Nv
+# BAYTAlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdSZWRtb25kMR4w
-# ZnQgQ29ycG9yYXRpb24xJjAkBgNVBAMTHU1pY3Jvc29mdCBUaW1lLVN0YW1wIFBD
+# HAYDVQQKExVNaWNyb3NvZnQgQ29ycG9yYXRpb24xJjAkBgNVBAMTHU1pY3Jvc29m
-# QSAyMDEwAhMzAAABDKp4btzMQkzBAAAAAAEMMA0GCWCGSAFlAwQCAQUAoIIBSjAa
+# dCBUaW1lLVN0YW1wIFBDQSAyMDEwAhMzAAABJy9uo++RqBmoAAAAAAEnMA0GCWCG
-# BgkqhkiG9w0BCQMxDQYLKoZIhvcNAQkQAQQwLwYJKoZIhvcNAQkEMSIEIDpwhjyu
+# SAFlAwQCAQUAoIIBSjAaBgkqhkiG9w0BCQMxDQYLKoZIhvcNAQkQAQQwLwYJKoZI
-# zgu3Kmxpnpz86ZlthBqEzG5vaEMOkYRyuFCaMIH6BgsqhkiG9w0BCRACLzGB6jCB
+# hvcNAQkEMSIEIJZkrbvF4R8oqYYpN6ZPGOj+QEZTQriEi/Yw9gW6zMqRMIH6Bgsq
-# 5zCB5DCBvQQgg5AWKX7M1+m2//+V7qmRvt1K/ww5Muu8XzGJBqygVCkwgZgwgYCk
+# hkiG9w0BCRACLzGB6jCB5zCB5DCBvQQgG5LoSxKGHWoW/wVMlbMztlQ4upAdzEmq
-# fjB8MQswCQYDVQQGEwJVUzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMH
+# H//vLu0jPiIwgZgwgYCkfjB8MQswCQYDVQQGEwJVUzETMBEGA1UECBMKV2FzaGlu
-# UmVkbW9uZDEeMBwGA1UEChMVTWljcm9zb2Z0IENvcnBvcmF0aW9uMSYwJAYDVQQD
+# Z3RvbjEQMA4GA1UEBxMHUmVkbW9uZDEeMBwGA1UEChMVTWljcm9zb2Z0IENvcnBv
-# Ex1NaWNyb3NvZnQgVGltZS1TdGFtcCBQQ0EgMjAxMAITMwAAAQyqeG7czEJMwQAA
+# cmF0aW9uMSYwJAYDVQQDEx1NaWNyb3NvZnQgVGltZS1TdGFtcCBQQ0EgMjAxMAIT
-# AAABDDAiBCD11urvv5vgo4gFVQ2NMVrzgxT87Yuiq16YdswYbaYeITANBgkqhkiG
+# MwAAAScvbqPvkagZqAAAAAABJzAiBCDwhEViCRvqKwQV3MxociF2iGYrDP4p1BK+
-# 9w0BAQsFAASCAQAi3q8hwcT2ft4b2EleaiyZxOImV/cKusmth1dtCh5/Jb0GbOld
+# s4tStO4vSDANBgkqhkiG9w0BAQsFAASCAQAkgmDo8lVmar0ZIqTG1it3skG8PZC9
-# f5cSalrjf42MNPodWAtgmWozkYrQF6HxnsOiYiamfRA8E3E7xyRMy7AFfAhjcwMi
+# iqEEC1vxcz8OSfsjl2QSkQ5T2+3xWpxWA4uy2+Byv0bi8EsfQEnnn4vtdthS6/kb
-# xaW4Iye6E1Ec6LtULANxfDtG/KIdCWdZxKqOezL3nzFNQWmm1mXPV+UnKpnJkA3E
+# vB/LLQiqoMhJ0rasf3/y/4KnQZEtztpg1+cCaNwFUgI6o+E8YEFt1frhLwFs/0WH
-# DsQOUWk8J6ojDurhrP536WI+3arg8PcnppHBLd/xNKYdlsTb+6qndgzKXkDDt1CV
+# 5pyBFx9ECEs0M22SLIpW13gexv9fgk6ZboIfSreAI28DLveeJpkgwggxHRpuVOVD
-# 4zCyuZ7bO8eyZAmNoSZz22k7vus9UjBz/CDhXylo20N43nr29rWPItUgH4uvOGQn
+# 4D7QQJAvJ0VU6p+yJlbvQXR9iltwb1REhlsJ5mADJ/FkzPVX/swMSUIoyE2inlxK
-# t26Y/yjBaQImz32psrfJEMbQ7cl789s8WOx8
+# LEiPkkZYwiFYCifFYUTnQjWU1Ls0EV+ysosL+jhzCxO8S6oRdp5TAi4F
-# SIG # End signature block
+# SIG # End signature block

src/Misc/dotnet-install.sh

@@ -241,42 +241,6 @@ 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() {
@@ -373,7 +337,7 @@ 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
 }
 
@@ -468,7 +432,6 @@ 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
@@ -545,17 +508,18 @@ 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
     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 +528,50 @@ 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 - $2
@@ -771,6 +779,7 @@ calculate_vars() {
     say_verbose "normalized_architecture=$normalized_architecture"
 
     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."
@@ -869,12 +878,12 @@ 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 = $specific_version failed to install with an unknown error."
+    say_err "\`$asset_name\` with version = $specific_product_version failed to install with an unknown error."
     return 1
 }
 
@@ -1058,6 +1067,11 @@ 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 "$0")
@@ -1079,7 +1093,6 @@ if [ "$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 +1103,6 @@ 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",

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/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: libicu66 -> libicu63 -> libicu60 -> libicu57 -> libicu55 -> libicu52
-            apt install -y libicu66 || 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: libicu66 -> libicu63 -> libicu60 -> libicu57 -> libicu55 -> libicu52
-                apt-get install -y libicu66 || 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/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

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/Constants.cs

@@ -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

@@ -16,6 +16,7 @@ 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);
@@ -79,6 +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();

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/Runner.Common.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <OutputType>Library</OutputType>
     <RuntimeIdentifiers>win-x64;win-x86;linux-x64;linux-arm64;linux-arm;osx-x64</RuntimeIdentifiers>
     <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>

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,
@@ -42,6 +43,7 @@ namespace GitHub.Runner.Listener
             Constants.Runner.CommandLine.Args.Labels,
             Constants.Runner.CommandLine.Args.MonitorSocketAddress,
             Constants.Runner.CommandLine.Args.Name,
+            Constants.Runner.CommandLine.Args.PAT,
             Constants.Runner.CommandLine.Args.RunnerGroup,
             Constants.Runner.CommandLine.Args.StartupType,
             Constants.Runner.CommandLine.Args.Token,
@@ -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);
@@ -187,6 +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
@@ -107,8 +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");
@@ -117,7 +117,7 @@ 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)
@@ -373,8 +373,8 @@ 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");
                     }
@@ -508,18 +508,107 @@ 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

@@ -71,6 +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(), requireFipsCryptography: true);
             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

@@ -319,7 +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

src/Runner.Listener/Runner.Listener.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <OutputType>Exe</OutputType>
     <RuntimeIdentifiers>win-x64;win-x86;linux-x64;linux-arm64;linux-arm;osx-x64</RuntimeIdentifiers>
     <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>

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)

src/Runner.PluginHost/Runner.PluginHost.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <OutputType>Exe</OutputType>
     <RuntimeIdentifiers>win-x64;win-x86;linux-x64;linux-arm64;linux-arm;osx-x64</RuntimeIdentifiers>
     <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>

src/Runner.Plugins/Artifact/FileContainerServer.cs

@@ -444,7 +444,7 @@ namespace GitHub.Runner.Plugins.Artifact
                 {
                     // We should never
                     context.Error($"Error '{ex.Message}' when downloading file '{fileToDownload}'. (Downloader {downloaderId})");
-                    throw ex;
+                    throw;
                 }
             }
 
@@ -528,7 +528,7 @@ namespace GitHub.Runner.Plugins.Artifact
                 catch (Exception ex)
                 {
                     context.Output($"File error '{ex.Message}' when uploading file '{fileToUpload}'.");
-                    throw ex;
+                    throw;
                 }
             }
 
@@ -682,4 +682,4 @@ namespace GitHub.Runner.Plugins.Artifact
             : base(message, inner)
         { }
     }
-}
+}

src/Runner.Plugins/Runner.Plugins.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <OutputType>Library</OutputType>
     <RuntimeIdentifiers>win-x64;win-x86;linux-x64;linux-arm64;linux-arm;osx-x64</RuntimeIdentifiers>
     <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>

src/Runner.Sdk/Runner.Sdk.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <OutputType>Library</OutputType>
     <RuntimeIdentifiers>win-x64;win-x86;linux-x64;linux-arm64;linux-arm;osx-x64</RuntimeIdentifiers>
     <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>

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/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.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;
@@ -183,11 +184,48 @@ 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.");
             }
 
+
+            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
@@ -281,7 +324,26 @@ 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.Global.PrependPath.RemoveAll(x => string.Equals(x, command.Data, StringComparison.CurrentCulture));
             context.Global.PrependPath.Add(command.Data);

src/Runner.Worker/ActionManager.cs

@@ -492,7 +492,7 @@ namespace GitHub.Runner.Worker
                     }
                 }
             }
-            executionContext.Output("##[endgroup");
+            executionContext.Output("##[endgroup]");
 
             if (retryCount == 3 && pullExitCode != 0)
             {
@@ -594,15 +594,33 @@ namespace GitHub.Runner.Worker
                     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 (attempt < 3)
+                catch (Exception ex) when (!executionContext.CancellationToken.IsCancellationRequested) // Do not retry if the run is canceled.
                 {
-                    executionContext.Output($"Failed to resolve action download info. Error: {ex.Message}");
+                    if (attempt < 3)
-                    executionContext.Debug(ex.ToString());
-                    if (String.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GITHUB_ACTION_DOWNLOAD_NO_BACKOFF")))
                     {
-                        var backoff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(30));
+                        executionContext.Output($"Failed to resolve action download info. Error: {ex.Message}");
-                        executionContext.Output($"Retrying in {backoff.TotalSeconds} seconds");
+                        executionContext.Debug(ex.ToString());
-                        await Task.Delay(backoff);
+                        if (String.IsNullOrEmpty(Environment.GetEnvironmentVariable("_GITHUB_ACTION_DOWNLOAD_NO_BACKOFF")))
+                        {
+                            var backoff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(30));
+                            executionContext.Output($"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);
+                        }
                     }
                 }
             }

src/Runner.Worker/ActionRunner.cs

@@ -135,6 +135,19 @@ 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.Global.Container != null)
             {
@@ -145,6 +158,10 @@ namespace GitHub.Runner.Worker
                 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();
@@ -238,7 +255,15 @@ namespace GitHub.Runner.Worker
             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

@@ -198,12 +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;
@@ -220,6 +226,9 @@ namespace GitHub.Runner.Worker
                 }
             }
 
+            // Remove credentials after pulling
+            ContainerRegistryLogout(configLocation);
+
             if (retryCount == 3 && pullExitCode != 0)
             {
                 throw new InvalidOperationException($"Docker pull failed with exit code {pullExitCode}");
@@ -437,5 +446,83 @@ namespace GitHub.Runner.Worker
                 throw new InvalidOperationException($"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/ExecutionContext.cs

@@ -48,6 +48,7 @@ namespace GitHub.Runner.Worker
 
         Dictionary<string, string> IntraActionState { get; }
         Dictionary<string, VariableValue> JobOutputs { get; }
+        ActionsEnvironmentReference ActionsEnvironment { get; }
         DictionaryContextData ExpressionValues { get; }
         IList<IFunctionInfo> ExpressionFunctions { get; }
         JobContext JobContext { get; }
@@ -137,6 +138,8 @@ namespace GitHub.Runner.Worker
         public CancellationToken CancellationToken => _cancellationTokenSource.Token;
         public Dictionary<string, string> IntraActionState { get; private set; }
         public Dictionary<string, VariableValue> JobOutputs { get; private set; }
+
+        public ActionsEnvironmentReference ActionsEnvironment { get; private set; }
         public DictionaryContextData ExpressionValues { get; } = new DictionaryContextData();
         public IList<IFunctionInfo> ExpressionFunctions { get; } = new List<IFunctionInfo>();
 
@@ -252,7 +255,7 @@ namespace GitHub.Runner.Worker
 
         /// <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. 
+        /// 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,
@@ -260,7 +263,7 @@ namespace GitHub.Runner.Worker
             DictionaryContextData inputsData,
             Dictionary<string, string> envData)
         {
-            step.ExecutionContext = Root.CreateChild(_record.Id, step.DisplayName, _record.Id.ToString("N"), scopeName, step.Action.ContextName, logger: _logger, insideComposite: true, cancellationTokenSource: CancellationTokenSource.CreateLinkedTokenSource(_cancellationTokenSource.Token));
+            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());
 
@@ -378,14 +381,14 @@ namespace GitHub.Runner.Worker
 
             if (Root != this)
             {
-                // only dispose TokenSource for step level ExecutionContext 
+                // only dispose TokenSource for step level ExecutionContext
                 _cancellationTokenSource?.Dispose();
             }
 
             _logger.End();
 
-            // todo: Skip if generated context name. After M271-ish the server will never send an empty context name. Generated context names will start with "__"
+            // 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))
+            if (!string.IsNullOrEmpty(ContextName) && !ContextName.StartsWith("__", StringComparison.Ordinal))
             {
                 Global.StepsContext.SetOutcome(ScopeName, ContextName, (Outcome ?? Result ?? TaskResult.Succeeded).ToActionResult());
                 Global.StepsContext.SetConclusion(ScopeName, ContextName, (Result ?? TaskResult.Succeeded).ToActionResult());
@@ -447,8 +450,8 @@ namespace GitHub.Runner.Worker
         {
             ArgUtil.NotNullOrEmpty(name, nameof(name));
 
-            // todo: Skip if generated context name. After M271-ish the server will never send an empty context name. Generated context names will start with "__"
+            // 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))
+            if (string.IsNullOrEmpty(ContextName) || ContextName.StartsWith("__", StringComparison.Ordinal))
             {
                 reference = null;
                 return;
@@ -611,6 +614,9 @@ namespace GitHub.Runner.Worker
             // Job Outputs
             JobOutputs = new Dictionary<string, VariableValue>(StringComparer.OrdinalIgnoreCase);
 
+            // Actions environment
+            ActionsEnvironment = message.ActionsEnvironment;
+
             // Service container info
             Global.ServiceContainers = new List<ContainerInfo>();
 
@@ -717,7 +723,7 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            _jobServerQueue.QueueWebConsoleLine(_record.Id, msg);
+            _jobServerQueue.QueueWebConsoleLine(_record.Id, msg, totalLines);
             return totalLines;
         }
 
@@ -912,6 +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)
         {

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

@@ -6,21 +6,26 @@ 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",
@@ -33,11 +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/Handlers/CompositeActionHandler.cs

@@ -32,9 +32,6 @@ namespace GitHub.Runner.Worker.Handlers
             ArgUtil.NotNull(Inputs, nameof(Inputs));
             ArgUtil.NotNull(Data.Steps, nameof(Data.Steps));
 
-            var githubContext = ExecutionContext.ExpressionValues["github"] as GitHubContext;
-            ArgUtil.NotNull(githubContext, nameof(githubContext));
-
             // Resolve action steps
             var actionSteps = Data.Steps;
 
@@ -56,14 +53,6 @@ namespace GitHub.Runner.Worker.Handlers
                 childScopeName = $"__{Guid.NewGuid()}";
             }
 
-            // Copy the github context so that we don't modify the original pointer
-            // We can't use PipelineContextData.Clone() since that creates a null pointer exception for copying a GitHubContext
-            var compositeGitHubContext = new GitHubContext();
-            foreach (var pair in githubContext)
-            {
-                compositeGitHubContext[pair.Key] = pair.Value;
-            }
-
             foreach (Pipelines.ActionStep actionStep in actionSteps)
             {
                 var actionRunner = HostContext.CreateService<IActionRunner>();
@@ -73,8 +62,13 @@ namespace GitHub.Runner.Worker.Handlers
 
                 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.ExpressionValues["github"] = compositeGitHubContext;
                 step.ExecutionContext.SetGitHubContext("action_path", ActionDirectory);
 
                 compositeSteps.Add(step);
@@ -90,6 +84,8 @@ namespace GitHub.Runner.Worker.Handlers
                 ExecutionContext.ExpressionValues["steps"] = ExecutionContext.Global.StepsContext.GetScope(ExecutionContext.GetFullyQualifiedContextName());
 
                 ProcessCompositeActionOutputs();
+
+                ExecutionContext.Global.StepsContext.ClearScope(childScopeName);
             }
             catch (Exception ex)
             {
@@ -135,12 +131,19 @@ namespace GitHub.Runner.Worker.Handlers
                     var outputsName = pair.Key;
                     var outputsAttributes = pair.Value as DictionaryContextData;
                     outputsAttributes.TryGetValue("value", out var val);
-                    var outputsValue = val as StringContextData;
 
-                    // Set output in the whole composite scope. 
+                    if (val != null)
-                    if (!String.IsNullOrEmpty(outputsName) && !String.IsNullOrEmpty(outputsValue))
                     {
-                        ExecutionContext.SetOutput(outputsName, outputsValue, out _);
+                        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 _);
+                        }
                     }
                 }
             }

src/Runner.Worker/Handlers/ContainerActionHandler.cs

@@ -70,7 +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"),
@@ -161,16 +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";

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.
@@ -74,6 +77,10 @@ namespace GitHub.Runner.Worker
                         {
                             // 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}'");
                         }
                     }
@@ -321,6 +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)
@@ -331,6 +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.
@@ -361,6 +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)
                     {
@@ -370,21 +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.Global.EnvironmentVariables)
-                            {
-                                envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
-                            }
 
-                            Trace.Info("Initialize steps context for evaluating job outputs");
-                            context.ExpressionValues["steps"] = context.Global.StepsContext.GetScope(context.ScopeName);
-
-                            var templateEvaluator = context.ToPipelineTemplateEvaluator();
                             var outputs = templateEvaluator.EvaluateJobOutput(message.JobOutputs, context.ExpressionValues, context.ExpressionFunctions);
                             foreach (var output in outputs)
                             {
@@ -413,6 +438,34 @@ namespace GitHub.Runner.Worker
                         }
                     }
 
+                    // 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.");
@@ -485,6 +538,11 @@ namespace GitHub.Runner.Worker
                             }
                         }
                     }
+
+                    if (_diskSpaceCheckTask != null)
+                    {
+                        _diskSpaceCheckToken.Cancel();
+                    }
                 }
                 catch (Exception ex)
                 {
@@ -500,6 +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

@@ -216,7 +216,7 @@ namespace GitHub.Runner.Worker
             }
 
             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>();

src/Runner.Worker/Runner.Worker.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <OutputType>Exe</OutputType>
     <RuntimeIdentifiers>win-x64;win-x86;linux-x64;linux-arm64;linux-arm;osx-x64</RuntimeIdentifiers>
     <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>

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

@@ -104,16 +104,7 @@ namespace GitHub.Runner.Worker
                 if (step is IActionRunner actionStep)
                 {
                     // Set GITHUB_ACTION
-                    // Warning: Do not turn on FF DistributedTask.UseContextNameForGITHUBACTION until after M271-ish. After M271-ish
+                    step.ExecutionContext.SetGitHubContext("action", actionStep.Action.Name);
-                    // the server will never send an empty context name. Generated context names start with "__"
-                    if (step.ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseContextNameForGITHUBACTION") ?? false)
-                    {
-                        step.ExecutionContext.SetGitHubContext("action", actionStep.Action.Name);
-                    }
-                    else
-                    {
-                        step.ExecutionContext.SetGitHubContext("action", step.ExecutionContext.GetFullyQualifiedContextName());
-                    }
 
                     try
                     {

src/Sdk/Common/Common/Authentication/HttpRequestMessageWrapper.cs

@@ -12,29 +12,9 @@ namespace GitHub.Services.Common
             m_request = request;
         }
 
-        public IHttpHeaders Headers
+        public IHttpHeaders Headers => this;
-        {
+        public Uri RequestUri => m_request.RequestUri;
-            get
+        public IDictionary<string,object> Properties => m_request.Options;
-            {
-                return this;
-            }
-        }
-
-        public Uri RequestUri
-        {
-            get
-            {
-                return m_request.RequestUri;
-            }
-        }
-
-        public IDictionary<string, object> Properties
-        {
-            get
-            {
-                return m_request.Properties;
-            }
-        }
 
         IEnumerable<String> IHttpHeaders.GetValues(String name)
         {

src/Sdk/Common/Common/Diagnostics/HttpRequestMessageExtensions.cs

@@ -21,7 +21,7 @@ namespace GitHub.Services.Common.Diagnostics
         public static VssTraceActivity GetActivity(this HttpRequestMessage message)
         {
             Object traceActivity;
-            if (!message.Properties.TryGetValue(VssTraceActivity.PropertyName, out traceActivity))
+            if (!message.Options.TryGetValue(VssTraceActivity.PropertyName, out traceActivity))
             {
                 return VssTraceActivity.Empty;
             }

src/Sdk/Common/Common/VssHttpMessageHandler.cs

@@ -169,7 +169,7 @@ namespace GitHub.Services.Common
             }
 
             // Add ourselves to the message so the underlying token issuers may use it if necessary
-            request.Properties[VssHttpMessageHandler.PropertyName] = this;
+            request.Options.Set(new HttpRequestOptionsKey<VssHttpMessageHandler>(VssHttpMessageHandler.PropertyName), this);
 
             Boolean succeeded = false;
             Boolean lastResponseDemandedProxyAuth = false;
@@ -409,7 +409,7 @@ namespace GitHub.Services.Common
             // Read the completion option provided by the caller. If we don't find the property then we
             // assume it is OK to buffer by default.
             HttpCompletionOption completionOption;
-            if (!request.Properties.TryGetValue(VssHttpRequestSettings.HttpCompletionOptionPropertyName, out completionOption))
+            if (!request.Options.TryGetValue(VssHttpRequestSettings.HttpCompletionOptionPropertyName, out completionOption))
             {
                 completionOption = HttpCompletionOption.ResponseContentRead;
             }

src/Sdk/Common/Common/VssHttpMessageHandlerTraceInfo.cs

@@ -77,9 +77,9 @@ namespace GitHub.Services.Common
         public static void SetTraceInfo(HttpRequestMessage message, VssHttpMessageHandlerTraceInfo traceInfo)
         {
             object existingTraceInfo;
-            if (!message.Properties.TryGetValue(TfsTraceInfoKey, out existingTraceInfo))
+            if (!message.Options.TryGetValue(TfsTraceInfoKey, out existingTraceInfo))
             {
-                message.Properties.Add(TfsTraceInfoKey, traceInfo);
+                message.Options.Set(new HttpRequestOptionsKey<VssHttpMessageHandlerTraceInfo>(TfsTraceInfoKey), traceInfo);
             }
         }
 
@@ -92,7 +92,7 @@ namespace GitHub.Services.Common
         {
             VssHttpMessageHandlerTraceInfo traceInfo = null;
 
-            if (message.Properties.TryGetValue(TfsTraceInfoKey, out object traceInfoObject))
+            if (message.Options.TryGetValue(TfsTraceInfoKey, out object traceInfoObject))
             {
                 traceInfo = traceInfoObject as VssHttpMessageHandlerTraceInfo;
             }

src/Sdk/Common/Common/VssHttpRequestSettings.cs

@@ -291,12 +291,12 @@ namespace GitHub.Services.Common
         protected internal virtual Boolean ApplyTo(HttpRequestMessage request)
         {
             // Make sure we only apply the settings to the request once
-            if (request.Properties.ContainsKey(PropertyName))
+            if (request.Options.TryGetValue(new HttpRequestOptionsKey<VssHttpRequestSettings>(PropertyName), out _))
             {
                 return false;
             }
 
-            request.Properties.Add(PropertyName, this);
+            request.Options.Set(new HttpRequestOptionsKey<VssHttpRequestSettings>(PropertyName), this);
 
             if (this.AcceptLanguages != null && this.AcceptLanguages.Count > 0)
             {

src/Sdk/Common/Common/VssHttpRetryMessageHandler.cs

@@ -55,7 +55,7 @@ namespace GitHub.Services.Common
             // Allow overriding default retry options per request
             VssHttpRetryOptions retryOptions = m_retryOptions;
             object retryOptionsObject;
-            if (request.Properties.TryGetValue(HttpRetryOptionsKey, out retryOptionsObject)) // NETSTANDARD compliant, TryGetValue<T> is not
+            if (request.Options.TryGetValue(HttpRetryOptionsKey, out retryOptionsObject)) // NETSTANDARD compliant, TryGetValue<T> is not
             {
                 // Fallback to default options if object of unexpected type was passed
                 retryOptions = retryOptionsObject as VssHttpRetryOptions ?? m_retryOptions;
@@ -66,7 +66,7 @@ namespace GitHub.Services.Common
 
             IVssHttpRetryInfo retryInfo = null;
             object retryInfoObject;
-            if (request.Properties.TryGetValue(HttpRetryInfoKey, out retryInfoObject)) // NETSTANDARD compliant, TryGetValue<T> is not
+            if (request.Options.TryGetValue(HttpRetryInfoKey, out retryInfoObject)) // NETSTANDARD compliant, TryGetValue<T> is not
             {
                 retryInfo = retryInfoObject as IVssHttpRetryInfo;
             }

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/AgentJobRequestMessage.cs

@@ -41,7 +41,8 @@ namespace GitHub.DistributedTask.Pipelines
             IEnumerable<JobStep> steps,
             IList<String> fileTable,
             TemplateToken jobOutputs,
-            IList<TemplateToken> defaults)
+            IList<TemplateToken> defaults,
+            ActionsEnvironmentReference actionsEnvironment)
         {
             this.MessageType = JobRequestMessageTypes.PipelineAgentJobRequest;
             this.Plan = plan;
@@ -54,7 +55,7 @@ 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);
@@ -228,6 +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>

src/Sdk/DTPipelines/Pipelines/JobContainer.cs

@@ -56,5 +56,36 @@ namespace GitHub.DistributedTask.Pipelines
             get;
             set;
         }
+
+        /// <summary>
+        /// Gets or sets the credentials used for pulling the container iamge.
+        /// </summary>
+        public ContainerRegistryCredentials Credentials
+        {
+            get;
+            set;
+        }
+    }
+
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public sealed class ContainerRegistryCredentials
+    {
+        /// <summary>
+        /// Gets or sets the user to authenticate to a registry with
+        /// </summary>
+        public String Username
+        {
+            get;
+            set;
+        }
+
+        /// <summary>
+        /// Gets or sets the password to authenticate to a registry with
+        /// </summary>
+        public String Password
+        {
+            get;
+            set;
+        }
     }
 }

src/Sdk/DTPipelines/Pipelines/ObjectTemplating/PipelineTemplateConstants.cs

@@ -14,8 +14,10 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String Clean= "clean";
         public const String Container = "container";
         public const String ContinueOnError = "continue-on-error";
+        public const String Credentials = "credentials";
         public const String Defaults = "defaults";
         public const String Env = "env";
+        public const String Environment = "environment";
         public const String Event = "event";
         public const String EventPattern = "github.event";
         public const String Exclude = "exclude";
@@ -45,6 +47,7 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String Options = "options";
         public const String Outputs = "outputs";
         public const String OutputsPattern = "needs.*.outputs";
+        public const String Password = "password";
         public const String Path = "path";
         public const String Pool = "pool";
         public const String Ports = "ports";
@@ -68,6 +71,7 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String Success = "success";
         public const String Template = "template";
         public const String TimeoutMinutes = "timeout-minutes";
+        public const String Username = "username";
         public const String Uses = "uses";
         public const String VmImage = "vmImage";
         public const String Volumes = "volumes";

src/Sdk/DTPipelines/Pipelines/ObjectTemplating/PipelineTemplateConverter.cs

@@ -209,6 +209,30 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             return (Int32)numberToken.Value;
         }
 
+        internal static ContainerRegistryCredentials ConvertToContainerCredentials(TemplateToken token)
+        {
+            var credentials = token.AssertMapping(PipelineTemplateConstants.Credentials);
+            var result = new ContainerRegistryCredentials();
+            foreach (var credentialProperty in credentials)
+            {
+                var propertyName = credentialProperty.Key.AssertString($"{PipelineTemplateConstants.Credentials} key");
+                switch (propertyName.Value)
+                {
+                    case PipelineTemplateConstants.Username:
+                        result.Username = credentialProperty.Value.AssertString(PipelineTemplateConstants.Username).Value;
+                        break;
+                    case PipelineTemplateConstants.Password:
+                        result.Password = credentialProperty.Value.AssertString(PipelineTemplateConstants.Password).Value;
+                        break;
+                    default:
+                        propertyName.AssertUnexpectedValue($"{PipelineTemplateConstants.Credentials} key {propertyName}");
+                        break;
+                }
+            }
+
+            return result;
+        }
+
         internal static JobContainer ConvertToJobContainer(
             TemplateContext context,
             TemplateToken value,
@@ -275,6 +299,9 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
                             }
                             result.Volumes = volumeList;
                             break;
+                        case PipelineTemplateConstants.Credentials:
+                            result.Credentials = ConvertToContainerCredentials(containerPropertyPair.Value);
+                            break;
                         default:
                             propertyName.AssertUnexpectedValue($"{PipelineTemplateConstants.Container} key");
                             break;

src/Sdk/DTPipelines/Pipelines/ObjectTemplating/PipelineTemplateEvaluator.cs

@@ -279,6 +279,33 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             return result;
         }
 
+        public TemplateToken EvaluateEnvironmentUrl(
+            TemplateToken token,
+            DictionaryContextData contextData,
+            IList<IFunctionInfo> expressionFunctions)
+        {
+            var result = default(TemplateToken);
+            if (token != null && token.Type != TokenType.Null)
+            {
+                var context = CreateContext(contextData, expressionFunctions);
+                try
+                {
+                    token = TemplateEvaluator.Evaluate(context, TemplateConstants.StringRunnerContextNoSecrets, token, 0, null, omitHeader: true);
+                    context.Errors.Check();
+                    result = token.AssertString("environment.url");
+                }
+                catch (Exception ex) when (!(ex is TemplateValidationException))
+                {
+                    context.Errors.Add(ex);
+                }
+
+                context.Errors.Check();
+            }
+
+            return result;
+        }
+
+
         public Dictionary<String, String> EvaluateJobDefaultsRun(
             TemplateToken token,
             DictionaryContextData contextData,

src/Sdk/DTPipelines/workflow-v1.0.json

@@ -373,7 +373,8 @@
           "options": "non-empty-string",
           "env": "container-env",
           "ports": "sequence-of-non-empty-string",
-          "volumes": "sequence-of-non-empty-string"
+          "volumes": "sequence-of-non-empty-string",
+          "credentials": "container-registry-credentials"
         }
       }
     },
@@ -404,6 +405,20 @@
       ]
     },
 
+    "container-registry-credentials": {
+      "context": [
+        "secrets",
+        "env",
+        "github"
+      ],
+      "mapping": {
+        "properties": {
+          "username": "non-empty-string",
+          "password": "non-empty-string"
+        }
+      }
+    },
+
     "container-env": {
       "mapping": {
         "loose-key-type": "non-empty-string",
@@ -500,6 +515,20 @@
       "string": {}
     },
 
+    "string-runner-context-no-secrets": {
+      "context": [
+        "github",
+        "needs",
+        "strategy",
+        "matrix",
+        "steps",
+        "job",
+        "runner",
+        "env"
+      ],
+      "string": {}
+    },
+
     "string-steps-context": {
       "context": [
         "github",
@@ -516,4 +545,4 @@
       "string": {}
     }
   }
-}
+}

src/Sdk/DTWebApi/WebApi/ActionsEnvironmentReference.cs

@@ -0,0 +1,23 @@
+using System.Runtime.Serialization;
+using GitHub.DistributedTask.ObjectTemplating.Tokens;
+
+namespace GitHub.DistributedTask.WebApi
+{
+    /// <summary>
+    /// Information about an environment parsed from YML with evaluated name, URL will be evaluated on runner
+    /// </summary>
+    [DataContract]
+    public class ActionsEnvironmentReference
+    {
+        public ActionsEnvironmentReference(string name)
+        {
+            Name = name;
+        }
+
+        [DataMember(EmitDefaultValue = false)]
+        public string Name { get; set; }
+
+        [DataMember(EmitDefaultValue = false)]
+        public TemplateToken Url { get; set; }
+    }
+}

src/Sdk/DTWebApi/WebApi/Exceptions.cs

@@ -2458,4 +2458,42 @@ namespace GitHub.DistributedTask.WebApi
         {
         }
     }
+
+    [Serializable]
+    public class UnresolvableActionDownloadInfoException : DistributedTaskException
+    {
+        public UnresolvableActionDownloadInfoException(String message)
+            : base(message)
+        {
+        }
+
+        public UnresolvableActionDownloadInfoException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        protected UnresolvableActionDownloadInfoException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
+    [Serializable]
+    public sealed class FailedToResolveActionDownloadInfoException : DistributedTaskException
+    {
+        public FailedToResolveActionDownloadInfoException(String message)
+            : base(message)
+        {
+        }
+
+        public FailedToResolveActionDownloadInfoException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        private FailedToResolveActionDownloadInfoException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
 }

src/Sdk/DTWebApi/WebApi/Issue.cs

@@ -17,6 +17,7 @@ namespace GitHub.DistributedTask.WebApi
             this.Type = issueToBeCloned.Type;
             this.Category = issueToBeCloned.Category;
             this.Message = issueToBeCloned.Message;
+            this.IsInfrastructureIssue = issueToBeCloned.IsInfrastructureIssue;
 
             if (issueToBeCloned.m_data != null)
             {
@@ -48,6 +49,13 @@ namespace GitHub.DistributedTask.WebApi
             set;
         }
 
+        [DataMember(Order = 4)]
+        public bool? IsInfrastructureIssue
+        {
+            get;
+            set;
+        }
+
         public IDictionary<String, String> Data
         {
             get

src/Sdk/DTWebApi/WebApi/JobEvent.cs

@@ -131,6 +131,17 @@ namespace GitHub.DistributedTask.WebApi
             this.Outputs = outputs;
         }
 
+        public JobCompletedEvent(
+            Int64 requestId,
+            Guid jobId,
+            TaskResult result,
+            Dictionary<String, VariableValue> outputs,
+            ActionsEnvironmentReference actionsEnvironment)
+            : this(requestId, jobId, result, outputs)
+        {
+            this.ActionsEnvironment = actionsEnvironment;
+        }
+
         [DataMember(EmitDefaultValue = false)]
         public Int64 RequestId
         {
@@ -151,6 +162,13 @@ namespace GitHub.DistributedTask.WebApi
             get;
             set;
         }
+
+        [DataMember(EmitDefaultValue = false)]
+        public ActionsEnvironmentReference ActionsEnvironment
+        {
+            get;
+            set;
+        }
     }
 
     [DataContract]

src/Sdk/DTWebApi/WebApi/TaskAgentSession.cs

@@ -65,5 +65,15 @@ namespace GitHub.DistributedTask.WebApi
             get;
             set;
         }
+
+        /// <summary>
+        /// Gets or sets whether to use FIPS compliant encryption scheme for job message key
+        /// </summary>
+        [DataMember]
+        public bool UseFipsEncryption
+        {
+            get;
+            set;
+        }
     }
 }

src/Sdk/DTWebApi/WebApi/TaskHttpClient.cs

@@ -50,7 +50,7 @@ namespace GitHub.DistributedTask.WebApi
             : base(baseUrl, pipeline, disposeHandler)
         {
         }
-
+        
         public Task AppendTimelineRecordFeedAsync(
             Guid scopeIdentifier,
             String planType,
@@ -91,6 +91,28 @@ namespace GitHub.DistributedTask.WebApi
                                                  userState,
                                                  cancellationToken);
         }
+        
+        public Task AppendTimelineRecordFeedAsync(
+            Guid scopeIdentifier,
+            String planType,
+            Guid planId,
+            Guid timelineId,
+            Guid recordId,
+            Guid stepId,
+            IList<String> lines,
+            long startLine,
+            CancellationToken cancellationToken = default(CancellationToken),
+            Object userState = null)
+        {
+            return AppendTimelineRecordFeedAsync(scopeIdentifier,
+                                                 planType,
+                                                 planId,
+                                                 timelineId,
+                                                 recordId,
+                                                 new TimelineRecordFeedLinesWrapper(stepId, lines, startLine),
+                                                 userState,
+                                                 cancellationToken);
+        }
 
         public async Task RaisePlanEventAsync<T>(
             Guid scopeIdentifier,

src/Sdk/DTWebApi/WebApi/TimelineRecordFeedLinesWrapper.cs

@@ -20,6 +20,12 @@ namespace GitHub.DistributedTask.WebApi
             this.Count = lines.Count;
         }
 
+        public TimelineRecordFeedLinesWrapper(Guid stepId, IList<string> lines, Int64 startLine)
+            : this(stepId, lines)
+        {
+            this.StartLine = startLine;
+        }
+
         [DataMember(Order = 0)]
         public Int32 Count { get; private set; }
 
@@ -31,5 +37,8 @@ namespace GitHub.DistributedTask.WebApi
 
         [DataMember(EmitDefaultValue = false)]
         public Guid StepId { get; set; }
+
+        [DataMember (EmitDefaultValue = false)]
+        public Int64? StartLine { get; private set; }
     }
 }

src/Sdk/DTWebApi/WebApi/TimelineRecordLogLine.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Runtime.Serialization;
+
+namespace GitHub.DistributedTask.WebApi
+{
+    [DataContract]
+    public sealed class TimelineRecordLogLine
+    {
+        public TimelineRecordLogLine(String line, long? lineNumber)
+        {
+            this.Line = line;
+            this.LineNumber = lineNumber;
+        }
+
+        [DataMember]
+        public String Line
+        {
+            get;
+            set;
+        }
+
+        [DataMember (EmitDefaultValue = false)]
+        public long? LineNumber
+        {
+            get;
+            set;
+        }
+    }
+}

src/Sdk/DTWebApi/WebApi/TimelineRecordState.cs

@@ -13,5 +13,8 @@ namespace GitHub.DistributedTask.WebApi
 
         [EnumMember]
         Completed,
+
+        [EnumMember]
+        Delayed,
     }
 }

src/Sdk/DTWebApi/WebApi/WellKnownDistributedTaskVariables.cs

@@ -5,5 +5,6 @@ namespace GitHub.DistributedTask.WebApi
     public static class WellKnownDistributedTaskVariables
     {
         public static readonly String JobId = "system.jobId";
+        public static readonly String RunnerLowDiskspaceThreshold = "system.runner.lowdiskspacethreshold";
     }
 }

src/Sdk/Sdk.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>netcoreapp3.1</TargetFramework>
+        <TargetFramework>net5.0</TargetFramework>
         <OutputType>Library</OutputType>
         <RuntimeIdentifiers>win-x64;win-x86;linux-x64;linux-arm64;linux-arm;osx-x64</RuntimeIdentifiers>
         <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>