c

* Exploring child Linked Cancellation Tokens

* Preliminary Timeout-minutes fix

* Final Solution for resolving cancellation token's timeout vs. cancellation

* Clean up + Fix error handling

* Use linked tokens instead

* Clean up

* one liner

* Remove JobExecutionContext => Replace with public Root accessor

* Move CreateLinkedTokenSource in the CreateCompositeStep Function

.github/workflows/build.yml

@@ -1,9 +1,10 @@
 name: Runner CI
 
 on:
+  workflow_dispatch:
   push:
     branches:
-    - master
+    - main
     - releases/*
     paths-ignore:
     - '**.md'    
@@ -17,28 +18,12 @@ jobs:
   build:
     strategy:
       matrix:
-        runtime: [ linux-x64, linux-arm64, linux-arm, win-x64, osx-x64 ]
+        runtime: [ linux-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
@@ -49,13 +34,6 @@ jobs:
         ${{ matrix.devScript }} layout Release ${{ matrix.runtime }}
       working-directory: src
 
-    # Run tests
-    - name: L0
-      run: |
-        ${{ matrix.devScript }} test
-      working-directory: src
-      if: matrix.runtime != 'linux-arm64' && matrix.runtime != 'linux-arm'
-
     # Create runner package tar.gz/zip
     - name: Package Release
       if: github.event_name != 'pull_request'
@@ -70,3 +48,18 @@ jobs:
       with:
         name: runner-package-${{ matrix.runtime }}
         path: _package
+    
+    - name: Build old version
+      run: |
+        echo 2.270.0 > runnerversion
+        ${{ matrix.devScript }} layout Release ${{ matrix.runtime }}
+        ${{ matrix.devScript }} package Release
+      working-directory: src
+
+    # Upload runner package tar.gz/zip as artifact
+    - name: Publish Artifact old
+      if: github.event_name != 'pull_request'
+      uses: actions/upload-artifact@v1
+      with:
+        name: runner-package-${{ matrix.runtime }}-old
+        path: _package

.github/workflows/release.yml

@@ -7,7 +7,7 @@ on:
   
 jobs:
   check:
-    if: startsWith(github.ref, 'refs/heads/releases/') || github.ref == 'refs/heads/master'
+    if: startsWith(github.ref, 'refs/heads/releases/') || github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2

Dockerfile

@@ -0,0 +1,57 @@
+FROM mcr.microsoft.com/dotnet/core/runtime-deps:3.1-buster-slim
+
+ENV RUNNER_CONFIG_URL=""
+ENV GITHUB_PAT=""
+ENV RUNNER_NAME=""
+ENV RUNNER_GROUP=""
+ENV RUNNER_LABELS=""
+# ENV GITHUB_RUNNER_SCOPE=""
+# ENV GITHUB_SERVER_URL=""
+# ENV GITHUB_API_URL=""
+# ENV K8S_HOST_IP=""
+
+RUN apt-get update --fix-missing \
+    && apt-get install -y --no-install-recommends \
+    curl \
+    jq \
+    apt-utils \
+    apt-transport-https \
+    unzip \
+    net-tools\
+    gnupg2\
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install kubectl
+RUN curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - && \
+    echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | tee -a /etc/apt/sources.list.d/kubernetes.list && \
+    apt-get update && apt-get -y install --no-install-recommends kubectl
+
+# Install docker
+RUN curl -fsSL https://get.docker.com -o get-docker.sh
+RUN sh get-docker.sh
+
+
+# Allow runner to run as root
+ENV RUNNER_ALLOW_RUNASROOT=1
+
+# Directory for runner to operate in
+RUN mkdir /actions-runner
+WORKDIR /actions-runner
+COPY ./src/Misc/download-runner.sh /actions-runner/download-runner.sh
+COPY ./src/Misc/entrypoint.sh /actions-runner/entrypoint.sh
+# COPY ./src/Misc/jobstart.sh /actions-runner/jobstart.sh
+# COPY ./src/Misc/jobrunning.sh /actions-runner/jobrunning.sh
+# COPY ./src/Misc/jobcomplete.sh /actions-runner/jobcomplete.sh
+COPY ./src/Misc/runner_lifecycle.sh /actions-runner/runner_lifecycle.sh
+
+RUN /actions-runner/download-runner.sh
+RUN rm -f /actions-runner/download-runner.sh
+
+# ENV _INTERNAL_JOBSTART_NOTIFICATION=/actions-runner/jobstart.sh
+# ENV _INTERNAL_JOBRUNNING_NOTIFICATION=/actions-runner/jobrunning.sh
+# ENV _INTERNAL_JOBCOMPLETE_NOTIFICATION=/actions-runner/jobcomplete.sh
+ENV _INTERNAL_RUNNER_LIFECYCLE_NOTIFICATION=/actions-runner/runner_lifecycle.sh
+
+
+ENTRYPOINT ["./entrypoint.sh"] 

Dockerfile.dind

@@ -0,0 +1,46 @@
+FROM docker:19.03
+
+# https://github.com/docker/docker/blob/master/project/PACKAGERS.md#runtime-dependencies
+RUN set -eux; \
+	apk add --no-cache \
+		btrfs-progs \
+		e2fsprogs \
+		e2fsprogs-extra \
+		iptables \
+		openssl \
+		shadow-uidmap \
+		xfsprogs \
+		xz \
+# pigz: https://github.com/moby/moby/pull/35697 (faster gzip implementation)
+		pigz \
+	; \
+# only install zfs if it's available for the current architecture
+# https://git.alpinelinux.org/cgit/aports/tree/main/zfs/APKBUILD?h=3.6-stable#n9 ("all !armhf !ppc64le" as of 2017-11-01)
+# "apk info XYZ" exits with a zero exit code but no output when the package exists but not for this arch
+	if zfs="$(apk info --no-cache --quiet zfs)" && [ -n "$zfs" ]; then \
+		apk add --no-cache zfs; \
+	fi
+
+# TODO aufs-tools
+
+# set up subuid/subgid so that "--userns-remap=default" works out-of-the-box
+RUN set -x \
+	&& addgroup -S dockremap \
+	&& adduser -S -G dockremap dockremap \
+	&& echo 'dockremap:165536:65536' >> /etc/subuid \
+	&& echo 'dockremap:165536:65536' >> /etc/subgid
+
+# https://github.com/docker/docker/tree/master/hack/dind
+ENV DIND_COMMIT ed89041433a031cafc0a0f19cfe573c31688d377
+
+RUN set -eux; \
+	wget -O /usr/local/bin/dind "https://raw.githubusercontent.com/docker/docker/${DIND_COMMIT}/hack/dind"; \
+	chmod +x /usr/local/bin/dind
+
+COPY dockerd-entrypoint.sh /usr/local/bin/
+
+VOLUME /var/lib/docker
+EXPOSE 6788 6789
+
+ENTRYPOINT ["dockerd-entrypoint.sh"]
+CMD []

autoscalev0.yaml

@@ -0,0 +1,14 @@
+apiVersion: actions.summerwind.dev/v1alpha1
+kind: RunnerDeployment
+metadata:
+  name: auto-scale-runners
+spec:
+  replicas: 1
+  maxRunnerLimit: 5
+  template:
+    spec:
+      configURL: https://github.com/bbq-beets/ting-test
+      githubTokenSecretKeyRef:
+        name: githubtoken
+        key: GITHUB_PAT
+

deployment.yaml

@@ -0,0 +1,63 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: runner-pod
+  labels:
+    name: runner-pod
+spec:
+  containers:
+  - name: runner-pod
+    image: huangtingluo/autoscale-runner:v0.0
+    imagePullPolicy: Always
+    env:
+      - name: GITHUB_PAT
+        value: 62c13e14e947958516c103a9584f66227697c447
+      - name: GITHUB_RUNNER_SCOPE
+        value: monalisa/main123
+      - name: K8S_HOST_IP
+        value: "192.168.120.1"
+
+# apiVersion: apps/v1
+# kind: Deployment
+# metadata:
+#   name: runner-deployment
+# spec:
+#   replicas: 1
+#   selector:
+#     matchLabels:
+#       app: runners
+#   template:
+#     metadata:
+#       labels:
+#         app: runners
+#     spec:
+#       # hostNetwork: true
+#       # volumes:
+#       # - name: docker-storage
+#       #   emptyDir: {}
+#       # containers:
+#       # - name: docker-host
+#       #   image: docker:18.05-dind
+#       #   imagePullPolicy: Always
+#       #   securityContext:
+#       #     privileged: true
+#       #   volumeMounts:
+#       #   - name: docker-storage
+#       #     mountPath: /var/lib/docker
+
+#       # hostNetwork: true
+#       containers:
+#       - name: runner
+#         image: huangtingluo/autoscale-runner:v0.0
+#         imagePullPolicy: Always
+#         env:
+#           - name: GITHUB_PAT
+#             value: 62c13e14e947958516c103a9584f66227697c447
+#           - name: GITHUB_RUNNER_SCOPE
+#             value: monalisa/main123
+#           - name: K8S_HOST_IP
+#             value: "192.168.120.1"
+#         resources:
+#           limits:
+#             memory: "128Mi"
+#             cpu: "500m"

dockerd-entrypoint.sh

@@ -0,0 +1,186 @@
+#!/bin/sh
+set -eu
+
+_tls_ensure_private() {
+	local f="$1"; shift
+	[ -s "$f" ] || openssl genrsa -out "$f" 4096
+}
+_tls_san() {
+	{
+		ip -oneline address | awk '{ gsub(/\/.+$/, "", $4); print "IP:" $4 }'
+		{
+			cat /etc/hostname
+			echo 'docker'
+			echo 'localhost'
+			hostname -f
+			hostname -s
+		} | sed 's/^/DNS:/'
+		[ -z "${DOCKER_TLS_SAN:-}" ] || echo "$DOCKER_TLS_SAN"
+	} | sort -u | xargs printf '%s,' | sed "s/,\$//"
+}
+_tls_generate_certs() {
+	local dir="$1"; shift
+
+	# if ca/key.pem || !ca/cert.pem, generate CA public if necessary
+	# if ca/key.pem, generate server public
+	# if ca/key.pem, generate client public
+	# (regenerating public certs every startup to account for SAN/IP changes and/or expiration)
+
+	# https://github.com/FiloSottile/mkcert/issues/174
+	local certValidDays='825'
+
+	if [ -s "$dir/ca/key.pem" ] || [ ! -s "$dir/ca/cert.pem" ]; then
+		# if we either have a CA private key or do *not* have a CA public key, then we should create/manage the CA
+		mkdir -p "$dir/ca"
+		_tls_ensure_private "$dir/ca/key.pem"
+		openssl req -new -key "$dir/ca/key.pem" \
+			-out "$dir/ca/cert.pem" \
+			-subj '/CN=docker:dind CA' -x509 -days "$certValidDays"
+	fi
+
+	if [ -s "$dir/ca/key.pem" ]; then
+		# if we have a CA private key, we should create/manage a server key
+		mkdir -p "$dir/server"
+		_tls_ensure_private "$dir/server/key.pem"
+		openssl req -new -key "$dir/server/key.pem" \
+			-out "$dir/server/csr.pem" \
+			-subj '/CN=docker:dind server'
+		cat > "$dir/server/openssl.cnf" <<-EOF
+			[ x509_exts ]
+			subjectAltName = $(_tls_san)
+		EOF
+		openssl x509 -req \
+				-in "$dir/server/csr.pem" \
+				-CA "$dir/ca/cert.pem" \
+				-CAkey "$dir/ca/key.pem" \
+				-CAcreateserial \
+				-out "$dir/server/cert.pem" \
+				-days "$certValidDays" \
+				-extfile "$dir/server/openssl.cnf" \
+				-extensions x509_exts
+		cp "$dir/ca/cert.pem" "$dir/server/ca.pem"
+		openssl verify -CAfile "$dir/server/ca.pem" "$dir/server/cert.pem"
+	fi
+
+	if [ -s "$dir/ca/key.pem" ]; then
+		# if we have a CA private key, we should create/manage a client key
+		mkdir -p "$dir/client"
+		_tls_ensure_private "$dir/client/key.pem"
+		chmod 0644 "$dir/client/key.pem" # openssl defaults to 0600 for the private key, but this one needs to be shared with arbitrary client contexts
+		openssl req -new \
+				-key "$dir/client/key.pem" \
+				-out "$dir/client/csr.pem" \
+				-subj '/CN=docker:dind client'
+		cat > "$dir/client/openssl.cnf" <<-'EOF'
+			[ x509_exts ]
+			extendedKeyUsage = clientAuth
+		EOF
+		openssl x509 -req \
+				-in "$dir/client/csr.pem" \
+				-CA "$dir/ca/cert.pem" \
+				-CAkey "$dir/ca/key.pem" \
+				-CAcreateserial \
+				-out "$dir/client/cert.pem" \
+				-days "$certValidDays" \
+				-extfile "$dir/client/openssl.cnf" \
+				-extensions x509_exts
+		cp "$dir/ca/cert.pem" "$dir/client/ca.pem"
+		openssl verify -CAfile "$dir/client/ca.pem" "$dir/client/cert.pem"
+	fi
+}
+
+# no arguments passed
+# or first arg is `-f` or `--some-option`
+if [ "$#" -eq 0 ] || [ "${1#-}" != "$1" ]; then
+	# set "dockerSocket" to the default "--host" *unix socket* value (for both standard or rootless)
+	uid="$(id -u)"
+	if [ "$uid" = '0' ]; then
+		dockerSocket='unix:///var/run/docker.sock'
+	else
+		# if we're not root, we must be trying to run rootless
+		: "${XDG_RUNTIME_DIR:=/run/user/$uid}"
+		dockerSocket="unix://$XDG_RUNTIME_DIR/docker.sock"
+	fi
+	case "${DOCKER_HOST:-}" in
+		unix://*)
+			dockerSocket="$DOCKER_HOST"
+			;;
+	esac
+
+	# add our default arguments
+	if [ -n "${DOCKER_TLS_CERTDIR:-}" ] \
+		&& _tls_generate_certs "$DOCKER_TLS_CERTDIR" \
+		&& [ -s "$DOCKER_TLS_CERTDIR/server/ca.pem" ] \
+		&& [ -s "$DOCKER_TLS_CERTDIR/server/cert.pem" ] \
+		&& [ -s "$DOCKER_TLS_CERTDIR/server/key.pem" ] \
+	; then
+		# generate certs and use TLS if requested/possible (default in 19.03+)
+		set -- dockerd \
+			--host="$dockerSocket" \
+			--host=tcp://0.0.0.0:6789 \
+			--tlsverify \
+			--tlscacert "$DOCKER_TLS_CERTDIR/server/ca.pem" \
+			--tlscert "$DOCKER_TLS_CERTDIR/server/cert.pem" \
+			--tlskey "$DOCKER_TLS_CERTDIR/server/key.pem" \
+			"$@"
+		DOCKERD_ROOTLESS_ROOTLESSKIT_FLAGS="${DOCKERD_ROOTLESS_ROOTLESSKIT_FLAGS:-} -p 0.0.0.0:6789:6789/tcp"
+	else
+		# TLS disabled (-e DOCKER_TLS_CERTDIR='') or missing certs
+		set -- dockerd \
+			--host="$dockerSocket" \
+			--host=tcp://0.0.0.0:6788 \
+			"$@"
+		DOCKERD_ROOTLESS_ROOTLESSKIT_FLAGS="${DOCKERD_ROOTLESS_ROOTLESSKIT_FLAGS:-} -p 0.0.0.0:6788:6788/tcp"
+	fi
+fi
+
+if [ "$1" = 'dockerd' ]; then
+	# explicitly remove Docker's default PID file to ensure that it can start properly if it was stopped uncleanly (and thus didn't clean up the PID file)
+	find /run /var/run -iname 'docker*.pid' -delete || :
+
+	uid="$(id -u)"
+	if [ "$uid" != '0' ]; then
+		# if we're not root, we must be trying to run rootless
+		if ! command -v rootlesskit > /dev/null; then
+			echo >&2 "error: attempting to run rootless dockerd but missing 'rootlesskit' (perhaps the 'docker:dind-rootless' image variant is intended?)"
+			exit 1
+		fi
+		user="$(id -un 2>/dev/null || :)"
+		if ! grep -qE "^($uid${user:+|$user}):" /etc/subuid || ! grep -qE "^($uid${user:+|$user}):" /etc/subgid; then
+			echo >&2 "error: attempting to run rootless dockerd but missing necessary entries in /etc/subuid and/or /etc/subgid for $uid"
+			exit 1
+		fi
+		: "${XDG_RUNTIME_DIR:=/run/user/$uid}"
+		export XDG_RUNTIME_DIR
+		if ! mkdir -p "$XDG_RUNTIME_DIR" || [ ! -w "$XDG_RUNTIME_DIR" ] || ! mkdir -p "$HOME/.local/share/docker" || [ ! -w "$HOME/.local/share/docker" ]; then
+			echo >&2 "error: attempting to run rootless dockerd but need writable HOME ($HOME) and XDG_RUNTIME_DIR ($XDG_RUNTIME_DIR) for user $uid"
+			exit 1
+		fi
+		if [ -f /proc/sys/kernel/unprivileged_userns_clone ] && unprivClone="$(cat /proc/sys/kernel/unprivileged_userns_clone)" && [ "$unprivClone" != '1' ]; then
+			echo >&2 "error: attempting to run rootless dockerd but need 'kernel.unprivileged_userns_clone' (/proc/sys/kernel/unprivileged_userns_clone) set to 1"
+			exit 1
+		fi
+		if [ -f /proc/sys/user/max_user_namespaces ] && maxUserns="$(cat /proc/sys/user/max_user_namespaces)" && [ "$maxUserns" = '0' ]; then
+			echo >&2 "error: attempting to run rootless dockerd but need 'user.max_user_namespaces' (/proc/sys/user/max_user_namespaces) set to a sufficiently large value"
+			exit 1
+		fi
+		# TODO overlay support detection?
+		exec rootlesskit \
+			--net="${DOCKERD_ROOTLESS_ROOTLESSKIT_NET:-vpnkit}" \
+			--mtu="${DOCKERD_ROOTLESS_ROOTLESSKIT_MTU:-1500}" \
+			--disable-host-loopback \
+			--port-driver=builtin \
+			--copy-up=/etc \
+			--copy-up=/run \
+			${DOCKERD_ROOTLESS_ROOTLESSKIT_FLAGS:-} \
+			"$@"
+	elif [ -x '/usr/local/bin/dind' ]; then
+		# if we have the (mostly defunct now) Docker-in-Docker wrapper script, use it
+		set -- '/usr/local/bin/dind' "$@"
+	fi
+else
+	# if it isn't `dockerd` we're trying to run, pass it through `docker-entrypoint.sh` so it gets `DOCKER_HOST` set appropriately too
+	set -- docker-entrypoint.sh "$@"
+fi
+
+exec "$@"

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

@@ -0,0 +1,293 @@
+# ADR 0549: Composite Run Steps
+
+**Date**: 2020-06-17
+
+**Status**: Accepted
+
+## Context
+
+Customers want to be able to compose actions from actions (ex: https://github.com/actions/runner/issues/438)
+
+An important step towards meeting this goal is to build in functionality for actions where users can simply execute any number of steps. 
+
+### Guiding Principles
+
+We don't want the workflow author to need to know how the internal workings of the action work. Users shouldn't know the internal workings of the composite action (for example, `default.shell` and `default.workingDir` should not be inherited from the workflow file to the action file). When deciding how to design certain parts of composite run steps, we want to think one logical step from the consumer.
+
+A composite action is treated as **one** individual job step (this is known as encapsulation).
+
+
+## Decision
+
+**In this ADR, we only support running multiple run steps in an Action.** In doing so, we build in support for mapping and flowing the inputs, outputs, and env variables (ex: All nested steps should have access to its parents' input variables and nested steps can overwrite the input variables).
+
+### Steps
+
+Example `workflow.yml`
+
+```yaml
+jobs:
+  build:
+    runs-on: self-hosted
+    steps:
+    - id: step1
+      uses: actions/setup-python@v1
+    - id: step2
+      uses: actions/setup-node@v2
+    - uses: actions/checkout@v2
+    - uses: user/composite@v1
+    - name: workflow step 1
+      run: echo hello world 3
+    - name: workflow step 2
+      run: echo hello world 4
+```
+
+Example `user/composite/action.yml`
+
+```yaml
+runs:
+  using: "composite"
+  steps:
+    - run: pip install -r requirements.txt
+    - run: npm install
+```
+
+Example Output
+
+```yaml
+[npm installation output]
+[pip requirements output]
+echo hello world 3
+echo hello world 4
+```
+
+We add a token called "composite" which allows our Runner code to process composite actions. By invoking "using: composite", our Runner code then processes the "steps" attribute, converts this template code to a list of steps, and finally runs each run step sequentially. If any step fails and there are no `if` conditions defined, the whole composite action job fails. 
+
+### Inputs
+
+Example `workflow.yml`:
+
+```yaml
+steps: 
+  - id: foo
+    uses: user/composite@v1
+    with:
+      your_name: "Octocat"
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+inputs:
+  your_name:
+    description: 'Your name'
+    default: 'Ethan'
+runs:
+  using: "composite"
+  steps: 
+    - run: echo hello ${{ inputs.your_name }}
+```
+
+Example Output:
+
+```
+hello Octocat
+```
+
+Each input variable in the composite action is only viewable in its own scope.
+
+### Outputs
+
+Example `workflow.yml`:
+
+```yaml
+...
+steps: 
+  - id: foo
+    uses: user/composite@v1
+  - run: echo random-number ${{ steps.foo.outputs.random-number }} 
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+outputs:
+  random-number: 
+    description: "Random number"
+    value: ${{ steps.random-number-generator.outputs.random-id }}
+runs:
+  using: "composite"
+  steps: 
+    - id: random-number-generator
+      run: echo "::set-output name=random-number::$(echo $RANDOM)"
+```
+
+Example Output:
+
+```
+::set-output name=my-output::43243
+random-number 43243
+```
+
+Each of the output variables from the composite action is viewable from the workflow file that uses the composite action. In other words, every child action output(s) is viewable only by its parent using dot notation (ex `steps.foo.outputs.random-number`).
+
+Moreover, the output ids are only accessible within the scope where it was defined. Note that in the example above, in our `workflow.yml` file, it should not have access to output id (i.e. `random-id`). The reason why we are doing this is because we don't want to require the workflow author to know the internal workings of the composite action.
+
+### Context
+
+Similar to the workflow file, the composite action has access to the [same context objects](https://help.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#contexts) (ex: `github`, `env`, `strategy`). 
+
+### Environment
+
+In the Composite Action, you'll only be able to use `::set-env::` to set environment variables just like you could with other actions.
+
+### Secrets
+
+**Note** : This feature 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
+
+Example `workflow.yml`:
+
+```yaml
+steps:
+  - run: exit 1
+  - uses: user/composite@v1  # <--- this will run, as it's marked as always runing
+    if: always()
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+runs:
+  using: "composite"
+  steps:
+    - run: echo "just succeeding"
+    - run: echo "I will run, as my current scope is succeeding"
+      if: success()
+    - run: exit 1
+    - run: echo "I will not run, as my current scope is now failing"
+```
+
+See the paragraph below for a rudimentary approach (thank you to @cybojenix for the idea, example, and explanation for this approach):
+
+The `if` statement in the parent (in the example above, this is the `workflow.yml`) shows whether or not we should run the composite action. So, our composite action will run since the `if` condition for running the composite action is `always()`.
+
+**Note that the if condition on the parent does not propagate to the rest of its children though.**
+
+In the child action (in this example, this is the `action.yml`), it starts with a clean slate (in other words, no imposing if conditions). Similar to the logic in the paragraph above, `echo "I will run, as my current scope is succeeding"` will run since the `if` condition checks if the previous steps **within this composite action** has not failed. `run: echo "I will not run, as my current scope is now failing"` will not run since the previous step resulted in an error and by default, the if expression is set to `success()` if the if condition is not set for a step.
+
+
+What if a step has `cancelled()`? We do the opposite of our approach above if `cancelled()` is used for any of our composite run steps. We will cancel any step that has this condition if the workflow is cancelled at all.
+    
+### Timeout-minutes
+
+Example `workflow.yml`:
+
+```yaml
+steps: 
+  - id: bar
+    uses: user/test@v1
+    timeout-minutes: 50
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+runs:
+  using: "composite"
+  steps: 
+    - id: foo1
+      run: echo test 1
+      timeout-minutes: 10
+    - id: foo2
+      run: echo test 2
+    - id: foo3
+      run: echo test 3
+      timeout-minutes: 10
+```
+
+A composite action in its entirety is a job. You can set both timeout-minutes for the whole composite action or its steps as long as the the sum of the `timeout-minutes` for each composite action step that has the attribute `timeout-minutes` is less than or equals to `timeout-minutes` for the composite action. There is no default timeout-minutes for each composite action step. 
+
+If the time taken for any of the steps in combination or individually exceed the whole composite action `timeout-minutes` attribute, the whole job will fail (1). If an individual step exceeds its own `timeout-minutes` attribute but the total time that has been used including this step is below the overall composite action `timeout-minutes`, the individual step will fail but the rest of the steps will run based on their own `timeout-minutes` attribute (they will still abide by condition (1) though).
+
+For reference, in the example above, if the composite step `foo1` takes 11 minutes to run, that step will fail but the rest of the steps, `foo1` and `foo2`, will proceed as long as their total runtime with the previous failed `foo1` action is less than the composite action's `timeout-minutes` (50 minutes). If the composite step `foo2` takes 51 minutes to run, it will cause the whole composite action job to fail. I
+
+The rationale behind this is that users can configure their steps with the `if` condition to conditionally set how steps rely on each other. Due to the additional capabilities that are offered with combining `timeout-minutes` and/or `if`, we wanted the `timeout-minutes` condition to be as dumb as possible and not effect other steps. 
+
+[Usage limits still apply](https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions?query=if%28%29#usage-limits)
+
+
+### Continue-on-error
+
+Example `workflow.yml`:
+
+```yaml
+steps: 
+  - run: exit 1
+  - id: bar
+    uses: user/test@v1
+    continue-on-error: false
+  - id: foo
+    run: echo "Hello World" <------- This step will not run
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+runs:
+  using: "composite"
+  steps: 
+    - run: exit 1
+      continue-on-error: true
+    - run: echo "Hello World 2" <----- This step will run
+```
+
+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. 
+
+Here is a visual represenation of the [first example](#Steps)
+
+```yaml
+| composite_action_node |
+    | echo hello world 1 | 
+    | echo hello world 2 |
+| echo hello world 3 | 
+| echo hello world 4 |
+
+```
+
+
+## Consequences
+
+This ADR lays the framework for eventually supporting nested Composite Actions within Composite Actions. This ADR allows for users to run multiple run steps within a GitHub Composite Action with the support of inputs, outputs, environment, and context for use in any steps as well as the if, timeout-minutes, and the continue-on-error attributes for each Composite Action step. 

ephemeralJob.yaml

@@ -0,0 +1,48 @@
+apiVersion: batch.github.actions/v1
+kind: CronJob
+metadata:
+    name: cronjob-sample
+spec:
+  schedule: "*/1 * * * *"
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          hostNetwork: true
+          containers:
+          - name: k8srunner
+            image: huangtingluo/autoscale-runner:v0.0
+            imagePullPolicy: Always
+            env:
+              - name: GITHUB_PAT
+                value: 62c13e14e947958516c103a9584f66227697c447
+              - name: GITHUB_RUNNER_SCOPE
+                value: monalisa/main123
+          restartPolicy: Never
+        # spec:
+        #   containers:
+        #   - name: hello
+        #     image: busybox
+        #     args:
+        #     - /bin/sh
+        #     - -c
+        #     - date; echo Hello from the Kubernetes cluster
+        #   restartPolicy: Never
+  # jobTemplate:
+  #   spec:
+  #     template:
+  #       spec:
+  #         hostNetwork: true
+  #         containers:
+  #         - name: k8srunner
+  #           image: huangtingluo/autoscale-runner:v0.0
+  #           imagePullPolicy: Always
+  #           env:
+  #             - name: GITHUB_PAT
+  #               value: 62c13e14e947958516c103a9584f66227697c447
+  #             - name: GITHUB_RUNNER_SCOPE
+  #               value: monalisa/main123
+  #         restartPolicy: Never
+  #     backoffLimit: 1
+  #     completions: 0
+  #     parallelism: 3

hpa-v2.yaml

@@ -0,0 +1,56 @@
+apiVersion: v1
+items:
+- apiVersion: autoscaling/v2beta2
+  kind: HorizontalPodAutoscaler
+  metadata:
+    creationTimestamp: "2020-08-05T19:14:04Z"
+    name: runner-deployment
+    namespace: default
+    resourceVersion: "167447"
+    selfLink: /apis/autoscaling/v2beta2/namespaces/default/horizontalpodautoscalers/runner-deployment
+    uid: 54d86943-eca9-468c-9698-c843f6b6183a
+  spec:
+    maxReplicas: 10
+    metrics:
+    - type: Object
+      object:
+        metric:
+          name: test-metric
+        describedObject:
+          apiVersion: v1
+          kind: Service
+          name: kubernetes
+        target:
+          type: Value
+          value: 300m
+    - resource:
+        name: cpu
+        target:
+          averageUtilization: 50
+          type: Utilization
+      type: Resource
+    minReplicas: 1
+    scaleTargetRef:
+      apiVersion: apps/v1
+      kind: Deployment
+      name: runner-deployment
+  status:
+    conditions:
+    - lastTransitionTime: "2020-08-05T19:14:19Z"
+      message: the HPA controller was able to get the target's current scale
+      reason: SucceededGetScale
+      status: "True"
+      type: AbleToScale
+    - lastTransitionTime: "2020-08-05T19:14:19Z"
+      message: 'the HPA was unable to compute the replica count: unable to get metrics
+        for resource cpu: no metrics returned from resource metrics API'
+      reason: FailedGetResourceMetric
+      status: "False"
+      type: ScalingActive
+    currentMetrics: null
+    currentReplicas: 1
+    desiredReplicas: 0
+kind: List
+metadata:
+  resourceVersion: ""
+  selfLink: ""

job.yaml

@@ -0,0 +1,92 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: pod-admin
+  namespace: default
+rules:
+- apiGroups: [ "" ]
+  resources: [ "pods", "pods/ephemeralcontainers", "pods/log", "pods/attach", "pods/exec"]
+  verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
+
+---
+
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: default-pod-admin
+  namespace: default
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: pod-admin
+subjects:
+- kind: ServiceAccount
+  name: default
+  namespace: default
+
+---
+
+apiVersion: batch/v1
+kind: Job
+metadata:
+    namespace: default
+    name: actions-runners
+spec:
+  template:
+    spec:
+      # hostNetwork: true
+      volumes:
+      - name: docker-storage
+        emptyDir: {}
+      - name: runner-working
+        emptyDir: {}
+      containers:
+      - name: docker-host
+        image: docker:18.05-dind
+        imagePullPolicy: Always
+        securityContext:
+          privileged: true
+        volumeMounts:
+        - name: docker-storage
+          mountPath: /var/lib/docker
+        - mountPath: /actions-runner/_work
+          name: runner-working
+      - name: k8srunner
+        image: huangtingluo/autoscale-runner:v0.0
+        volumeMounts:
+          - mountPath: /actions-runner/_work
+            name: runner-working
+        imagePullPolicy: Always
+        env:
+          - name: GITHUB_PAT
+            value: 62c13e14e947958516c103a9584f66227697c447
+          - name: GITHUB_RUNNER_SCOPE
+            value: monalisa/main123
+          - name: K8S_HOST_IP
+            value: "192.168.120.1"
+          - name: DOCKER_HOST
+            value: tcp://localhost:2375
+          - name: K8S_NODE_NAME
+            valueFrom:
+              fieldRef:
+                fieldPath: spec.nodeName
+          - name: K8S_POD_NAME
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.name
+          - name: K8S_POD_NAMESPACE
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.namespace
+          - name: K8S_POD_IP
+            valueFrom:
+              fieldRef:
+                fieldPath: status.podIP
+          - name: K8S_POD_SERVICE_ACCOUNT
+            valueFrom:
+              fieldRef:
+                fieldPath: spec.serviceAccountName
+      restartPolicy: Never
+  backoffLimit: 1
+  completions: 20
+  parallelism: 3

prereq.yaml

@@ -0,0 +1,34 @@
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  namespace: default
+  name: pod-patcher
+rules:
+- apiGroups: [""] # "" indicates the core API group
+  resources: ["pods"]
+  verbs: ["get", "watch", "list", "patch"]
+
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: default-pod-patcher
+  namespace: default
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: pod-patcher
+subjects:
+- kind: ServiceAccount
+  name: default
+  namespace: default
+
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: githubtoken
+type: Opaque
+stringData:
+  GITHUB_PAT: "xxx"

runner.yaml

@@ -0,0 +1,12 @@
+apiVersion: actions.github.com/v1alpha1
+kind: Runner
+metadata:
+  name: auto-scale-runners
+spec:
+  organization: monalisa
+  group: default
+  repository: main123
+  githubAdminToken: 62c13e14e947958516c103a9584f66227697c447
+  env:
+    - name: K8S_HOST_IP
+      value: "192.168.120.1"

runners.yaml

@@ -0,0 +1,46 @@
+apiVersion: actions.github.com/v1alpha1
+kind: AutoScaleRunner
+metadata:
+  name: auto-scale-runners
+spec:
+  minReplicas: 1
+  maxReplicas: 5
+  configURL: https://github.com/TingluoHuang/example-services
+  githubTokenSecretKeyRef:
+    name: githubtoken
+    key: GITHUB_PAT
+  template:
+    spec:
+      setupDockerInDocker: true
+      imagePullPolicy: Always
+  runnerUpdateHandler:
+    containers:
+    - name: update-image
+      image: huangtingluo/workflow_dispatch:latest
+      imagePullPolicy: Always
+      env:
+        - name: GITHUB_TOKEN
+          valueFrom: 
+            secretKeyRef:
+              name: githubtoken
+              key: GITHUB_PAT
+        - name: GITHUB_OWNER
+          value: tingluohuang
+        - name: GITHUB_REPO
+          value: "workflow_dispatch"
+        - name: GITHUB_EXTRA_CURL_ARG
+          value: "-v"
+        - name: GITHUB_WORKFLOW
+          value: "2539181"
+        - name: GITHUB_WORKFLOW_INPUTS
+          value: "{\"test_input\":\"test\"}"
+    
+        # - name: GITHUB_REPO
+        #   value: "k8s-runner-image"
+        # - name: GITHUB_EXTRA_CURL_ARG
+        #   value: "-v"
+        # - name: GITHUB_WORKFLOW
+        #   value: "docker-publish.yml"
+        # - name: GITHUB_WORKFLOW_INPUTS
+        #   value: "{\"runnerDownloadUrl\":\"https://github.com/TingluoHuang/runner/releases/download/test/actions-runner-linux-x64-2.299.0.tar.gz\"}"
+    

src/Misc/download-runner.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -e
+
+# if the scope has a slash, it's a repo runner
+# orgs_or_repos="orgs"
+# if [[ "$GITHUB_RUNNER_SCOPE" == *\/* ]]; then
+#     orgs_or_repos="repos"
+# fi
+
+#RUNNER_DOWNLOAD_URL=$(curl -s -X GET ${GITHUB_API_URL}/${orgs_or_repos}/${GITHUB_RUNNER_SCOPE}/actions/runners/downloads -H "authorization: token $GITHUB_PAT" -H "accept: application/vnd.github.everest-preview+json" | jq -r '.[]|select(.os=="linux" and .architecture=="x64")|.download_url')
+
+# download actions and unzip it
+#curl -Ls ${RUNNER_DOWNLOAD_URL} | tar xz \
+
+curl -Ls https://github.com/TingluoHuang/runner/releases/download/test/actions-runner-linux-x64-2.299.0.tar.gz | tar xz
+
+# delete the download tar.gz file
+rm -f ${RUNNER_DOWNLOAD_URL##*/}

src/Misc/entrypoint.sh

@@ -0,0 +1,77 @@
+#!/bin/bash
+
+set -euo pipefail
+
+function fatal() {
+   echo "error: $1" >&2
+   exit 1
+}
+
+[ -n "${GITHUB_PAT:-""}" ] || fatal "GITHUB_PAT variable must be set"
+[ -n "${RUNNER_CONFIG_URL:-""}" ] || fatal "RUNNER_CONFIG_URL variable must be set"
+[ -n "${RUNNER_NAME:-""}" ] || fatal "RUNNER_NAME variable must be set"
+
+# if [ -n "${RUNNER_NAME}" ]; then
+#     # Use container id to gen unique runner name if name not provide
+#     CONTAINER_ID=$(cat /proc/self/cgroup | head -n 1 | tr '/' '\n' | tail -1 | cut -c1-12)
+#     RUNNER_NAME="actions-runner-${CONTAINER_ID}"
+# fi
+
+# if the scope has a slash, it's a repo runner
+# orgs_or_repos="orgs"
+# if [[ "$GITHUB_RUNNER_SCOPE" == *\/* ]]; then
+#     orgs_or_repos="repos"
+# fi
+
+# RUNNER_REG_URL="${GITHUB_SERVER_URL:=https://github.com}/${GITHUB_RUNNER_SCOPE}"
+
+echo "Runner Name      : ${RUNNER_NAME}"
+echo "Registration URL : ${RUNNER_CONFIG_URL}"
+# echo "GitHub API URL   : ${GITHUB_API_URL:=https://api.github.com}"
+echo "Runner Labels    : ${RUNNER_LABELS:=""}"
+
+# TODO: if api url is not default, validate it ends in /api/v3
+
+RUNNER_LABELS_ARG=""
+if [ -n "${RUNNER_LABELS}" ]; then
+    RUNNER_LABELS_ARG="--labels ${RUNNER_LABELS}"
+fi
+
+RUNNER_GROUP_ARG=""
+if [ -n "${RUNNER_GROUP}" ]; then
+    RUNNER_GROUP_ARG="--runnergroup ${RUNNER_GROUP}"
+fi
+
+# if [ -n "${K8S_HOST_IP}" ]; then
+#     export http_proxy=http://$K8S_HOST_IP:9090
+# fi
+
+# curl -v -s -X POST ${GITHUB_API_URL}/${orgs_or_repos}/${GITHUB_RUNNER_SCOPE}/actions/runners/registration-token -H "authorization: token $GITHUB_PAT" -H "accept: application/vnd.github.everest-preview+json"
+
+# Generate registration token
+# RUNNER_REG_TOKEN=$(curl -s -X POST ${GITHUB_API_URL}/${orgs_or_repos}/${GITHUB_RUNNER_SCOPE}/actions/runners/registration-token -H "authorization: token $GITHUB_PAT" -H "accept: application/vnd.github.everest-preview+json" | jq -r '.token')
+
+# Create the runner and configure it
+./config.sh --unattended --name $RUNNER_NAME --url $RUNNER_CONFIG_URL --pat $GITHUB_PAT $RUNNER_LABELS_ARG $RUNNER_GROUP_ARG --replace --ephemeral
+
+# while (! docker version ); do
+#   # Docker takes a few seconds to initialize
+#   echo "Waiting for Docker to launch..."
+#   sleep 1
+# done
+
+# unset env
+unset RUNNER_CONFIG_URL
+unset GITHUB_PAT
+unset RUNNER_NAME
+unset RUNNER_GROUP
+unset RUNNER_LABELS
+unset RUNNER_LABELS_ARG
+unset RUNNER_GROUP_ARG
+
+# Run it
+./bin/runsvc.sh interactive
+
+# export http_proxy=""
+# dockerdpid=$(kubectl exec $K8S_POD_NAME --container docker-host -- pidof dockerd)
+# kubectl exec $K8S_POD_NAME --container docker-host -- kill -SIGINT $dockerdpid

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

@@ -1683,9 +1683,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.15",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
-      "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
+      "version": "4.17.19",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.19.tgz",
+      "integrity": "sha512-JNvd8XER9GQX0v2qJgsaN/mzFCNA5BRe/j8JN9d+tWyGLSodKQHKFicdwNYzWwI3wjRnaKPsGj1XkBjx/F96DQ==",
       "dev": true
     },
     "lodash.unescape": {

src/Misc/jobcomplete.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+echo "Test-0"
+set -euo pipefail
+
+echo "Test-1"
+function fatal() {
+   echo "error: $1" >&2
+   exit 1
+}
+
+echo "Test-2"
+[ -n "${K8S_POD_NAME:-""}" ] || fatal "K8S_POD_NAME variable must be set"
+
+echo "Test-3"
+# echo $http_proxy
+# unset http_proxy
+# unset https_proxy
+# export http_proxy=
+# export HTTP_PROXY=
+
+echo "Test-4"
+kubectl annotate pods $K8S_POD_NAME JOBCOMPLETE=$(date +%s) || fatal "Can't annotate job complete"
+
+echo "Test-5"
+exit 0

src/Misc/jobrunning.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+echo "Test-0"
+set -euo pipefail
+
+echo "Test-1"
+function fatal() {
+   echo "error: $1" >&2
+   exit 1
+}
+
+echo "Test-2"
+[ -n "${K8S_POD_NAME:-""}" ] || fatal "K8S_POD_NAME variable must be set"
+
+echo "Test-3"
+# echo $http_proxy
+# unset http_proxy
+# unset https_proxy
+# export http_proxy=
+# export HTTP_PROXY=
+
+echo "Test-4"
+kubectl annotate pods $K8S_POD_NAME JOBRUNNING=$(date +%s) --overwrite || fatal "Can't annotate job running"
+
+echo "Test-5"
+exit 0

src/Misc/jobstart.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+echo "Test-0"
+
+set -euo pipefail
+
+echo "Test-1"
+function fatal() {
+   echo "error: $1" >&2
+   exit 1
+}
+
+echo "Test-2"
+[ -n "${K8S_POD_NAME:-""}" ] || fatal "K8S_POD_NAME variable must be set"
+
+echo "Test-3"
+# echo $http_proxy
+# # unset http_proxy
+# # unset https_proxy
+# export http_proxy=
+# export HTTP_PROXY=
+
+echo "Test-4"
+kubectl -v9 get pod
+
+echo "Test-5"
+echo $K8S_POD_NAME
+timestamp=$(date +%s)
+echo $timestamp
+
+kubectl annotate pods $K8S_POD_NAME JOBSTART=$timestamp
+
+echo "Test-5"

src/Misc/layoutroot/config.sh

@@ -67,7 +67,7 @@ while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symli
   [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
 done
 DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
-cd $DIR
+cd "$DIR"
 
 source ./env.sh
 

src/Misc/runner_lifecycle.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -euo pipefail
+
+EVENT=$1
+TIMESTAMP=$2
+
+echo $EVENT
+echo $TIMESTAMP
+
+function fatal() {
+   echo "error: $1" >&2
+   exit 1
+}
+
+[ -n "${K8S_POD_NAME:-""}" ] || fatal "K8S_POD_NAME variable must be set"
+echo $K8S_POD_NAME
+
+kubectl get pod
+
+kubectl annotate pods $K8S_POD_NAME $EVENT=$TIMESTAMP
+
+echo "DONE"

src/Runner.Common/ConfigurationStore.cs

@@ -33,6 +33,9 @@ namespace GitHub.Runner.Common
         [DataMember(EmitDefaultValue = false)]
         public string PoolName { get; set; }
 
+        [DataMember(EmitDefaultValue = false)]
+        public bool Ephemeral { get; set; }
+
         [DataMember(EmitDefaultValue = false)]
         public string ServerUrl { get; set; }
 

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,
                     };
@@ -120,9 +122,9 @@ namespace GitHub.Runner.Common
                 public static class Flags
                 {
                     public static readonly string Commit = "commit";
+                    public static readonly string Ephemeral = "ephemeral";
                     public static readonly string Help = "help";
                     public static readonly string Replace = "replace";
-                    public static readonly string Once = "once";
                     public static readonly string RunAsService = "runasservice";
                     public static readonly string Unattended = "unattended";
                     public static readonly string Version = "version";

src/Runner.Common/Util/EncodingUtil.cs

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

src/Runner.Listener/CommandSettings.cs

@@ -28,10 +28,10 @@ namespace GitHub.Runner.Listener
         private readonly string[] validFlags =
         {
             Constants.Runner.CommandLine.Flags.Commit,
+            Constants.Runner.CommandLine.Flags.Ephemeral,
             Constants.Runner.CommandLine.Flags.Help,
             Constants.Runner.CommandLine.Flags.Replace,
             Constants.Runner.CommandLine.Flags.RunAsService,
-            Constants.Runner.CommandLine.Flags.Once,
             Constants.Runner.CommandLine.Flags.Unattended,
             Constants.Runner.CommandLine.Flags.Version
         };
@@ -42,6 +42,7 @@ 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.Pool,
             Constants.Runner.CommandLine.Args.StartupType,
             Constants.Runner.CommandLine.Args.Token,
@@ -63,8 +64,7 @@ namespace GitHub.Runner.Listener
         public bool Help => TestFlag(Constants.Runner.CommandLine.Flags.Help);
         public bool Unattended => TestFlag(Constants.Runner.CommandLine.Flags.Unattended);
         public bool Version => TestFlag(Constants.Runner.CommandLine.Flags.Version);
-
-        public bool RunOnce => TestFlag(Constants.Runner.CommandLine.Flags.Once);
+        public bool Ephemeral => TestFlag(Constants.Runner.CommandLine.Flags.Ephemeral);
 
         // Constructor.
         public CommandSettings(IHostContext context, string[] args)
@@ -178,6 +178,11 @@ namespace GitHub.Runner.Listener
                 validator: Validators.NonEmptyValidator);
         }
 
+        public string GetGitHubPersonalAccessToken()
+        {
+            return GetArg(name: Constants.Runner.CommandLine.Args.PAT);
+        }
+
         public string GetRunnerRegisterToken()
         {
             return GetArgOrPrompt(

src/Runner.Listener/Configuration/ConfigurationManager.cs

@@ -7,11 +7,13 @@ using GitHub.Services.OAuth;
 using GitHub.Services.WebApi;
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 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 +109,21 @@ namespace GitHub.Runner.Listener.Configuration
                 else
                 {
                     runnerSettings.GitHubUrl = inputUrl;
-                    var githubToken = command.GetRunnerRegisterToken();
-                    GitHubAuthResult authResult = await GetTenantCredential(inputUrl, githubToken, Constants.RunnerEvent.Register);
+                    var githubPAT = command.GetGitHubPersonalAccessToken();
+                    var registerToken = string.Empty;
+                    if (!string.IsNullOrEmpty(githubPAT))
+                    {
+                        Trace.Info("Retriving runner register token using GitHub PAT.");
+                        var jitToken = await GetJITRunnerTokenAsync(inputUrl, githubPAT, "registration");
+                        Trace.Info($"Retrived runner register token is good to {jitToken.ExpiresAt}.");
+                        HostContext.SecretMasker.AddValue(jitToken.Token);
+                        registerToken = jitToken.Token;
+                    }
+                    if (string.IsNullOrEmpty(registerToken))
+                    {
+                        registerToken = command.GetRunnerRegisterToken();
+                    }
+                    GitHubAuthResult authResult = await GetTenantCredential(inputUrl, registerToken, Constants.RunnerEvent.Register);
                     runnerSettings.ServerUrl = authResult.TenantUrl;
                     creds = authResult.ToVssCredentials();
                     Trace.Info("cred retrieved via GitHub auth");
@@ -177,6 +192,7 @@ namespace GitHub.Runner.Listener.Configuration
             TaskAgent agent;
             while (true)
             {
+                runnerSettings.Ephemeral = command.Ephemeral;
                 runnerSettings.AgentName = command.GetRunnerName();
 
                 _term.WriteLine();
@@ -193,7 +209,7 @@ namespace GitHub.Runner.Listener.Configuration
                     if (command.GetReplace())
                     {
                         // Update existing agent with new PublicKey, agent version.
-                        agent = UpdateExistingAgent(agent, publicKey, userLabels);
+                        agent = UpdateExistingAgent(agent, publicKey, userLabels, runnerSettings.Ephemeral);
 
                         try
                         {
@@ -216,7 +232,7 @@ namespace GitHub.Runner.Listener.Configuration
                 else
                 {
                     // Create a new agent.
-                    agent = CreateNewAgent(runnerSettings.AgentName, publicKey, userLabels);
+                    agent = CreateNewAgent(runnerSettings.AgentName, publicKey, userLabels, runnerSettings.Ephemeral);
 
                     try
                     {
@@ -356,8 +372,22 @@ namespace GitHub.Runner.Listener.Configuration
                     }
                     else
                     {
-                        var githubToken = command.GetRunnerDeletionToken();
-                        GitHubAuthResult authResult = await GetTenantCredential(settings.GitHubUrl, githubToken, Constants.RunnerEvent.Remove);
+                        var githubPAT = command.GetGitHubPersonalAccessToken();
+                        var deletionToken = string.Empty;
+                        if (!string.IsNullOrEmpty(githubPAT))
+                        {
+                            Trace.Info("Retriving runner deletion token using GitHub PAT.");
+                            var jitToken = await GetJITRunnerTokenAsync(settings.GitHubUrl, githubPAT, "remove");
+                            Trace.Info($"Retrived runner deletion token is good to {jitToken.ExpiresAt}.");
+                            HostContext.SecretMasker.AddValue(jitToken.Token);
+                            deletionToken = jitToken.Token;
+                        }
+                        if (string.IsNullOrEmpty(deletionToken))
+                        {
+                            deletionToken = command.GetRunnerDeletionToken();
+                        }
+
+                        GitHubAuthResult authResult = await GetTenantCredential(settings.GitHubUrl, deletionToken, Constants.RunnerEvent.Remove);
                         creds = authResult.ToVssCredentials();
                         Trace.Info("cred retrieved via GitHub auth");
                     }
@@ -440,7 +470,7 @@ namespace GitHub.Runner.Listener.Configuration
         }
 
 
-        private TaskAgent UpdateExistingAgent(TaskAgent agent, RSAParameters publicKey, ISet<string> userLabels)
+        private TaskAgent UpdateExistingAgent(TaskAgent agent, RSAParameters publicKey, ISet<string> userLabels, bool ephemeral)
         {
             ArgUtil.NotNull(agent, nameof(agent));
             agent.Authorization = new TaskAgentAuthorization
@@ -451,6 +481,8 @@ namespace GitHub.Runner.Listener.Configuration
             // update should replace the existing labels
             agent.Version = BuildConstants.RunnerPackage.Version;
             agent.OSDescription = RuntimeInformation.OSDescription;
+            agent.Ephemeral = ephemeral;
+            agent.MaxParallelism = 1;
 
             agent.Labels.Clear();
 
@@ -466,7 +498,7 @@ namespace GitHub.Runner.Listener.Configuration
             return agent;
         }
 
-        private TaskAgent CreateNewAgent(string agentName, RSAParameters publicKey, ISet<string> userLabels)
+        private TaskAgent CreateNewAgent(string agentName, RSAParameters publicKey, ISet<string> userLabels, bool ephemeral)
         {
             TaskAgent agent = new TaskAgent(agentName)
             {
@@ -477,6 +509,7 @@ namespace GitHub.Runner.Listener.Configuration
                 MaxParallelism = 1,
                 Version = BuildConstants.RunnerPackage.Version,
                 OSDescription = RuntimeInformation.OSDescription,
+                Ephemeral = ephemeral,
             };
 
             agent.Labels.Add(new AgentLabel("self-hosted", LabelType.System));
@@ -498,6 +531,72 @@ namespace GitHub.Runner.Listener.Configuration
                 string.Equals(gitHubUrl.Host, "github.localhost", StringComparison.OrdinalIgnoreCase);
         }
 
+        private async Task<GitHubRunnerRegisterToken> GetJITRunnerTokenAsync(string githubUrl, string githubToken, string tokenType)
+        {
+            var githubApiUrl = "";
+            var gitHubUrlBuilder = new UriBuilder(githubUrl);
+            var path = gitHubUrlBuilder.Path.Split(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar, StringSplitOptions.RemoveEmptyEntries);
+            if (path.Length == 1)
+            {
+                if (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";
+                }
+            }
+            if (path.Length == 2)
+            {
+                var repoScope = "repos/";
+                if (string.Equals(path[0], "enterprises", StringComparison.OrdinalIgnoreCase))
+                {
+                    repoScope = "";
+                }
+
+                if (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 = "";

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/JobDispatcher.cs

@@ -477,6 +477,53 @@ namespace GitHub.Runner.Listener
                         var systemConnection = message.Resources.Endpoints.SingleOrDefault(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
                         var accessToken = systemConnection?.Authorization?.Parameters["AccessToken"];
                         notification.JobStarted(message.JobId, accessToken, systemConnection.Url);
+                        var jobStartNotification = Environment.GetEnvironmentVariable("_INTERNAL_RUNNER_LIFECYCLE_NOTIFICATION");
+                        if (!string.IsNullOrEmpty(jobStartNotification))
+                        {
+                            term.WriteLine($"{DateTime.UtcNow:u}: Publish JobStart to {jobStartNotification}");
+                            using (var jobStartInvoker = HostContext.CreateService<IProcessInvoker>())
+                            {
+                                jobStartInvoker.OutputDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stdout)
+                                {
+                                    if (!string.IsNullOrEmpty(stdout.Data))
+                                    {
+                                        Trace.Info($"JobStartNotification: {stdout.Data}");
+                                    }
+                                };
+
+                                jobStartInvoker.ErrorDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stderr)
+                                {
+                                    if (!string.IsNullOrEmpty(stderr.Data))
+                                    {
+                                        if (!string.IsNullOrEmpty(stderr.Data))
+                                        {
+                                            Trace.Error($"JobStartNotification: {stderr.Data}");
+                                        }
+                                    }
+                                };
+
+                                try
+                                {
+                                    await jobStartInvoker.ExecuteAsync(
+                                        workingDirectory: HostContext.GetDirectory(WellKnownDirectory.Root),
+                                        fileName: WhichUtil.Which("bash"),
+                                        arguments: $"-c \"{jobStartNotification} JOBSTART {DateTime.UtcNow.ToString("O")}\"",
+                                        environment: null,
+                                        requireExitCodeZero: true,
+                                        outputEncoding: null,
+                                        killProcessOnCancel: true,
+                                        redirectStandardIn: null,
+                                        inheritConsoleHandler: false,
+                                        keepStandardInOpen: false,
+                                        highPriorityProcess: true,
+                                        cancellationToken: new CancellationTokenSource(10000).Token);
+                                }
+                                catch (Exception ex)
+                                {
+                                    Trace.Error($"Fail to publish JobStart notification: {ex}");
+                                }
+                            }
+                        }
 
                         HostContext.WritePerfCounter($"SentJobToWorker_{requestId.ToString()}");
 
@@ -613,6 +660,53 @@ namespace GitHub.Runner.Listener
                         {
                             // This should be the last thing to run so we don't notify external parties until actually finished
                             await notification.JobCompleted(message.JobId);
+                            var jobCompleteNotification = Environment.GetEnvironmentVariable("_INTERNAL_RUNNER_LIFECYCLE_NOTIFICATION");
+                            if (!string.IsNullOrEmpty(jobCompleteNotification))
+                            {
+                                term.WriteLine($"{DateTime.UtcNow:u}: Publish JobComplete to {jobCompleteNotification}");
+                                using (var jobCompleteInvoker = HostContext.CreateService<IProcessInvoker>())
+                                {
+                                    jobCompleteInvoker.OutputDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stdout)
+                                    {
+                                        if (!string.IsNullOrEmpty(stdout.Data))
+                                        {
+                                            Trace.Info($"jobCompleteNotification: {stdout.Data}");
+                                        }
+                                    };
+
+                                    jobCompleteInvoker.ErrorDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stderr)
+                                    {
+                                        if (!string.IsNullOrEmpty(stderr.Data))
+                                        {
+                                            if (!string.IsNullOrEmpty(stderr.Data))
+                                            {
+                                                Trace.Error($"jobCompleteNotification: {stderr.Data}");
+                                            }
+                                        }
+                                    };
+
+                                    try
+                                    {
+                                        await jobCompleteInvoker.ExecuteAsync(
+                                            workingDirectory: HostContext.GetDirectory(WellKnownDirectory.Root),
+                                            fileName: WhichUtil.Which("bash"),
+                                            arguments: $"-c \"{jobCompleteNotification} JOBCOMPLETE {DateTime.UtcNow.ToString("O")}\"",
+                                            environment: null,
+                                            requireExitCodeZero: true,
+                                            outputEncoding: null,
+                                            killProcessOnCancel: true,
+                                            redirectStandardIn: null,
+                                            inheritConsoleHandler: false,
+                                            keepStandardInOpen: false,
+                                            highPriorityProcess: true,
+                                            cancellationToken: new CancellationTokenSource(10000).Token);
+                                    }
+                                    catch (Exception ex)
+                                    {
+                                        Trace.Error($"Fail to publish JobComplete notification: {ex}");
+                                    }
+                                }
+                            }
                         }
                     }
                 }
@@ -645,7 +739,56 @@ namespace GitHub.Runner.Listener
                         // fire first renew succeed event.
                         firstJobRequestRenewed.TrySetResult(0);
                     }
+                    else
+                    {
+                        var jobRunningNotification = Environment.GetEnvironmentVariable("_INTERNAL_RUNNER_LIFECYCLE_NOTIFICATION");
+                        if (!string.IsNullOrEmpty(jobRunningNotification))
+                        {
+                            HostContext.GetService<ITerminal>().WriteLine($"{DateTime.UtcNow:u}: Publish JobRunning to {jobRunningNotification}");
+                            using (var jobRunningInvoker = HostContext.CreateService<IProcessInvoker>())
+                            {
+                                jobRunningInvoker.OutputDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stdout)
+                                {
+                                    if (!string.IsNullOrEmpty(stdout.Data))
+                                    {
+                                        Trace.Info($"JobRunningNotification: {stdout.Data}");
+                                    }
+                                };
 
+                                jobRunningInvoker.ErrorDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stderr)
+                                {
+                                    if (!string.IsNullOrEmpty(stderr.Data))
+                                    {
+                                        if (!string.IsNullOrEmpty(stderr.Data))
+                                        {
+                                            Trace.Error($"JobRunningNotification: {stderr.Data}");
+                                        }
+                                    }
+                                };
+
+                                try
+                                {
+                                    await jobRunningInvoker.ExecuteAsync(
+                                        workingDirectory: HostContext.GetDirectory(WellKnownDirectory.Root),
+                                        fileName: WhichUtil.Which("bash"),
+                                        arguments: $"-c \"{jobRunningNotification} JOBRUNNING {DateTime.UtcNow.ToString("O")}\"",
+                                        environment: null,
+                                        requireExitCodeZero: true,
+                                        outputEncoding: null,
+                                        killProcessOnCancel: true,
+                                        redirectStandardIn: null,
+                                        inheritConsoleHandler: false,
+                                        keepStandardInOpen: false,
+                                        highPriorityProcess: true,
+                                        cancellationToken: new CancellationTokenSource(10000).Token);
+                                }
+                                catch (Exception ex)
+                                {
+                                    Trace.Error($"Fail to publish JobRunning notification: {ex}");
+                                }
+                            }
+                        }
+                    }
                     if (encounteringError > 0)
                     {
                         encounteringError = 0;

src/Runner.Listener/Runner.cs

@@ -193,7 +193,7 @@ namespace GitHub.Runner.Listener
                     HostContext.StartupType = startType;
 
                     // Run the runner interactively or as service
-                    return await RunAsync(settings, command.RunOnce);
+                    return await RunAsync(settings, settings.Ephemeral);
                 }
                 else
                 {
@@ -474,7 +474,7 @@ Config Options:
     _term.WriteLine($@" --windowslogonaccount string   Account to run the service as. Requires runasservice");
     _term.WriteLine($@" --windowslogonpassword string  Password for the service account. Requires runasservice");
 #endif
-    _term.WriteLine($@"
+            _term.WriteLine($@"
 Examples:
  Configure a runner non-interactively:
   .{separator}config.{ext} --unattended --url <url> --token <token>

src/Runner.Listener/SelfUpdater.cs

@@ -59,6 +59,53 @@ namespace GitHub.Runner.Listener
 
                 Trace.Info($"An update is available.");
 
+                var runnerUpdateNotification = Environment.GetEnvironmentVariable("_INTERNAL_RUNNER_LIFECYCLE_NOTIFICATION");
+                if (!string.IsNullOrEmpty(runnerUpdateNotification))
+                {
+                    HostContext.GetService<ITerminal>().WriteLine($"{DateTime.UtcNow:u}: Publish RunnerUpdate to {runnerUpdateNotification}");
+                    using (var runnerUpdateInvoker = HostContext.CreateService<IProcessInvoker>())
+                    {
+                        runnerUpdateInvoker.OutputDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stdout)
+                        {
+                            if (!string.IsNullOrEmpty(stdout.Data))
+                            {
+                                Trace.Info($"RunnerUpdateNotification: {stdout.Data}");
+                            }
+                        };
+
+                        runnerUpdateInvoker.ErrorDataReceived += delegate (object sender, ProcessDataReceivedEventArgs stderr)
+                        {
+                            if (!string.IsNullOrEmpty(stderr.Data))
+                            {
+                                if (!string.IsNullOrEmpty(stderr.Data))
+                                {
+                                    Trace.Error($"RunnerUpdateNotification: {stderr.Data}");
+                                }
+                            }
+                        };
+
+                        try
+                        {
+                            await runnerUpdateInvoker.ExecuteAsync(
+                                workingDirectory: HostContext.GetDirectory(WellKnownDirectory.Root),
+                                fileName: WhichUtil.Which("bash"),
+                                arguments: $"-c \"{runnerUpdateNotification} RUNNERUPDATE {DateTime.UtcNow.ToString("O")}\"",
+                                environment: null,
+                                requireExitCodeZero: true,
+                                outputEncoding: null,
+                                killProcessOnCancel: true,
+                                redirectStandardIn: null,
+                                inheritConsoleHandler: false,
+                                keepStandardInOpen: false,
+                                highPriorityProcess: true,
+                                cancellationToken: new CancellationTokenSource(10000).Token);
+                        }
+                        catch (Exception ex)
+                        {
+                            Trace.Error($"Fail to publish RunnerUpdate notification: {ex}");
+                        }
+                    }
+                }
                 // Print console line that warn user not shutdown runner.
                 await UpdateRunnerUpdateStateAsync("Runner update in progress, do not shutdown runner.");
                 await UpdateRunnerUpdateStateAsync($"Downloading {_targetPackage.Version} runner");

src/Runner.Sdk/Util/StringUtil.cs

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

src/Runner.Worker/ActionCommandManager.cs

@@ -188,7 +188,7 @@ namespace GitHub.Runner.Worker
                 throw new Exception("Required field 'name' is missing in ##[set-env] command.");
             }
 
-            context.EnvironmentVariables[envName] = command.Data;
+            context.Global.EnvironmentVariables[envName] = command.Data;
             context.SetEnvContext(envName, command.Data);
             context.Debug($"{envName}='{command.Data}'");
         }
@@ -283,8 +283,8 @@ namespace GitHub.Runner.Worker
         public void ProcessCommand(IExecutionContext context, string line, ActionCommand command, ContainerInfo container)
         {
             ArgUtil.NotNullOrEmpty(command.Data, "path");
-            context.PrependPath.RemoveAll(x => string.Equals(x, command.Data, StringComparison.CurrentCulture));
-            context.PrependPath.Add(command.Data);
+            context.Global.PrependPath.RemoveAll(x => string.Equals(x, command.Data, StringComparison.CurrentCulture));
+            context.Global.PrependPath.Add(command.Data);
         }
     }
 

src/Runner.Worker/ActionManager.cs

@@ -66,7 +66,7 @@ namespace GitHub.Runner.Worker
 
             // TODO: Deprecate the PREVIEW_ACTION_TOKEN
             // Log even if we aren't using it to ensure users know.
-            if (!string.IsNullOrEmpty(executionContext.Variables.Get("PREVIEW_ACTION_TOKEN")))
+            if (!string.IsNullOrEmpty(executionContext.Global.Variables.Get("PREVIEW_ACTION_TOKEN")))
             {
                 executionContext.Warning("The 'PREVIEW_ACTION_TOKEN' secret is deprecated. Please remove it from the repository's secrets");
             }
@@ -75,7 +75,7 @@ namespace GitHub.Runner.Worker
             IOUtil.DeleteDirectory(HostContext.GetDirectory(WellKnownDirectory.Actions), executionContext.CancellationToken);
 
             // todo: Remove when feature flag DistributedTask.NewActionMetadata is removed
-            var newActionMetadata = executionContext.Variables.GetBoolean("DistributedTask.NewActionMetadata") ?? false;
+            var newActionMetadata = executionContext.Global.Variables.GetBoolean("DistributedTask.NewActionMetadata") ?? false;
 
             var repositoryActions = new List<Pipelines.ActionStep>();
 
@@ -398,8 +398,10 @@ namespace GitHub.Runner.Worker
                     else if (definition.Data.Execution.ExecutionType == ActionExecutionType.Composite && !string.IsNullOrEmpty(Environment.GetEnvironmentVariable("TESTING_COMPOSITE_ACTIONS_ALPHA")))
                     {
                         var compositeAction = definition.Data.Execution as CompositeActionExecutionData;
-                        Trace.Info($"Load {compositeAction.Steps.Count} action steps.");
-                        Trace.Verbose($"Details: {StringUtil.ConvertToJson(compositeAction.Steps)}");
+                        Trace.Info($"Load {compositeAction.Steps?.Count ?? 0} action steps.");
+                        Trace.Verbose($"Details: {StringUtil.ConvertToJson(compositeAction?.Steps)}");
+                        Trace.Info($"Load: {compositeAction.Outputs?.Count ?? 0} number of outputs");
+                        Trace.Info($"Details: {StringUtil.ConvertToJson(compositeAction?.Outputs)}");
                     }
                     else
                     {
@@ -466,7 +468,7 @@ namespace GitHub.Runner.Worker
             ArgUtil.NotNull(setupInfo, nameof(setupInfo));
             ArgUtil.NotNullOrEmpty(setupInfo.Container.Image, nameof(setupInfo.Container.Image));
 
-            executionContext.Output($"Pull down action image '{setupInfo.Container.Image}'");
+            executionContext.Output($"##[group]Pull down action image '{setupInfo.Container.Image}'");
 
             // Pull down docker image with retry up to 3 times
             var dockerManger = HostContext.GetService<IDockerCommandManager>();
@@ -490,6 +492,7 @@ namespace GitHub.Runner.Worker
                     }
                 }
             }
+            executionContext.Output("##[endgroup");
 
             if (retryCount == 3 && pullExitCode != 0)
             {
@@ -509,7 +512,7 @@ namespace GitHub.Runner.Worker
             ArgUtil.NotNull(setupInfo, nameof(setupInfo));
             ArgUtil.NotNullOrEmpty(setupInfo.Container.Dockerfile, nameof(setupInfo.Container.Dockerfile));
 
-            executionContext.Output($"Build container for action use: '{setupInfo.Container.Dockerfile}'.");
+            executionContext.Output($"##[group]Build container for action use: '{setupInfo.Container.Dockerfile}'.");
 
             // Build docker image with retry up to 3 times
             var dockerManger = HostContext.GetService<IDockerCommandManager>();
@@ -539,6 +542,7 @@ namespace GitHub.Runner.Worker
                     }
                 }
             }
+            executionContext.Output("##[endgroup]");
 
             if (retryCount == 3 && buildExitCode != 0)
             {
@@ -587,7 +591,7 @@ namespace GitHub.Runner.Worker
             {
                 try
                 {
-                    actionDownloadInfos = await jobServer.ResolveActionDownloadInfoAsync(executionContext.Plan.ScopeIdentifier, executionContext.Plan.PlanType, executionContext.Plan.PlanId, new WebApi.ActionReferenceList { Actions = actionReferences }, executionContext.CancellationToken);
+                    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)
@@ -945,7 +949,7 @@ namespace GitHub.Runner.Worker
             if (string.IsNullOrEmpty(authToken))
             {
                 // TODO: Deprecate the PREVIEW_ACTION_TOKEN
-                authToken = executionContext.Variables.Get("PREVIEW_ACTION_TOKEN");
+                authToken = executionContext.Global.Variables.Get("PREVIEW_ACTION_TOKEN");
             }
 
             if (!string.IsNullOrEmpty(authToken))
@@ -1222,6 +1226,7 @@ namespace GitHub.Runner.Worker
         public override bool HasPre => false;
         public override bool HasPost => false;
         public List<Pipelines.ActionStep> Steps { get; set; }
+        public MappingToken Outputs { get; set; }
     }
 
     public abstract class ActionExecutionData

src/Runner.Worker/ActionManifestManager.cs

@@ -23,6 +23,8 @@ namespace GitHub.Runner.Worker
     {
         ActionDefinitionData Load(IExecutionContext executionContext, string manifestFile);
 
+        DictionaryContextData EvaluateCompositeOutputs(IExecutionContext executionContext, TemplateToken token, IDictionary<string, PipelineContextData> extraExpressionValues);
+
         List<string> EvaluateContainerArguments(IExecutionContext executionContext, SequenceToken token, IDictionary<string, PipelineContextData> extraExpressionValues);
 
         Dictionary<string, string> EvaluateContainerEnvironment(IExecutionContext executionContext, MappingToken token, IDictionary<string, PipelineContextData> extraExpressionValues);
@@ -53,7 +55,7 @@ namespace GitHub.Runner.Worker
 
         public ActionDefinitionData Load(IExecutionContext executionContext, string manifestFile)
         {
-            var templateContext = CreateContext(executionContext);
+            var templateContext = CreateTemplateContext(executionContext);
             ActionDefinitionData actionDefinition = new ActionDefinitionData();
 
             // Clean up file name real quick
@@ -75,9 +77,9 @@ namespace GitHub.Runner.Worker
 
                 // Add this file to the FileTable in executionContext if it hasn't been added already
                 // we use > since fileID is 1 indexed
-                if (fileId > executionContext.FileTable.Count)
+                if (fileId > executionContext.Global.FileTable.Count)
                 {
-                    executionContext.FileTable.Add(fileRelativePath);
+                    executionContext.Global.FileTable.Add(fileRelativePath);
                 }
 
                 // Read the file
@@ -89,6 +91,9 @@ namespace GitHub.Runner.Worker
                 }
 
                 var actionMapping = token.AssertMapping("action manifest root");
+                var actionOutputs = default(MappingToken);
+                var actionRunValueToken = default(TemplateToken);
+
                 foreach (var actionPair in actionMapping)
                 {
                     var propertyName = actionPair.Key.AssertString($"action.yml property key");
@@ -99,22 +104,39 @@ namespace GitHub.Runner.Worker
                             actionDefinition.Name = actionPair.Value.AssertString("name").Value;
                             break;
 
+                        case "outputs":
+                            if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("TESTING_COMPOSITE_ACTIONS_ALPHA")))
+                            {
+                                actionOutputs = actionPair.Value.AssertMapping("outputs");
+                                break;
+                            }
+                            Trace.Info($"Ignore action property outputs. Outputs for a whole action is not supported yet.");
+                            break;
+
                         case "description":
                             actionDefinition.Description = actionPair.Value.AssertString("description").Value;
                             break;
 
                         case "inputs":
-                            ConvertInputs(templateContext, actionPair.Value, actionDefinition);
+                            ConvertInputs(actionPair.Value, actionDefinition);
                             break;
 
                         case "runs":
-                            actionDefinition.Execution = ConvertRuns(executionContext, templateContext, actionPair.Value);
+                            // Defer runs token evaluation to after for loop to ensure that order of outputs doesn't matter.
+                            actionRunValueToken = actionPair.Value;
                             break;
+
                         default:
                             Trace.Info($"Ignore action property {propertyName}.");
                             break;
                     }
                 }
+
+                // Evaluate Runs Last
+                if (actionRunValueToken != null)
+                {
+                    actionDefinition.Execution = ConvertRuns(executionContext, templateContext, actionRunValueToken, fileRelativePath, actionOutputs);
+                }
             }
             catch (Exception ex)
             {
@@ -146,6 +168,33 @@ namespace GitHub.Runner.Worker
             return actionDefinition;
         }
 
+        public DictionaryContextData EvaluateCompositeOutputs(
+            IExecutionContext executionContext,
+            TemplateToken token,
+            IDictionary<string, PipelineContextData> extraExpressionValues)
+        {
+            var result = default(DictionaryContextData);
+
+            if (token != null)
+            {
+                var templateContext = CreateTemplateContext(executionContext, extraExpressionValues);
+                try
+                {
+                    token = TemplateEvaluator.Evaluate(templateContext, "outputs", token, 0, null, omitHeader: true);
+                    templateContext.Errors.Check();
+                    result = token.ToContextData().AssertDictionary("composite outputs");
+                }
+                catch (Exception ex) when (!(ex is TemplateValidationException))
+                {
+                    templateContext.Errors.Add(ex);
+                }
+
+                templateContext.Errors.Check();
+            }
+
+            return result ?? new DictionaryContextData();
+        }
+
         public List<string> EvaluateContainerArguments(
             IExecutionContext executionContext,
             SequenceToken token,
@@ -155,11 +204,11 @@ namespace GitHub.Runner.Worker
 
             if (token != null)
             {
-                var context = CreateContext(executionContext, extraExpressionValues);
+                var templateContext = CreateTemplateContext(executionContext, extraExpressionValues);
                 try
                 {
-                    var evaluateResult = TemplateEvaluator.Evaluate(context, "container-runs-args", token, 0, null, omitHeader: true);
-                    context.Errors.Check();
+                    var evaluateResult = TemplateEvaluator.Evaluate(templateContext, "container-runs-args", token, 0, null, omitHeader: true);
+                    templateContext.Errors.Check();
 
                     Trace.Info($"Arguments evaluate result: {StringUtil.ConvertToJson(evaluateResult)}");
 
@@ -176,10 +225,10 @@ namespace GitHub.Runner.Worker
                 catch (Exception ex) when (!(ex is TemplateValidationException))
                 {
                     Trace.Error(ex);
-                    context.Errors.Add(ex);
+                    templateContext.Errors.Add(ex);
                 }
 
-                context.Errors.Check();
+                templateContext.Errors.Check();
             }
 
             return result;
@@ -194,11 +243,11 @@ namespace GitHub.Runner.Worker
 
             if (token != null)
             {
-                var context = CreateContext(executionContext, extraExpressionValues);
+                var templateContext = CreateTemplateContext(executionContext, extraExpressionValues);
                 try
                 {
-                    var evaluateResult = TemplateEvaluator.Evaluate(context, "container-runs-env", token, 0, null, omitHeader: true);
-                    context.Errors.Check();
+                    var evaluateResult = TemplateEvaluator.Evaluate(templateContext, "container-runs-env", token, 0, null, omitHeader: true);
+                    templateContext.Errors.Check();
 
                     Trace.Info($"Environments evaluate result: {StringUtil.ConvertToJson(evaluateResult)}");
 
@@ -220,10 +269,10 @@ namespace GitHub.Runner.Worker
                 catch (Exception ex) when (!(ex is TemplateValidationException))
                 {
                     Trace.Error(ex);
-                    context.Errors.Add(ex);
+                    templateContext.Errors.Add(ex);
                 }
 
-                context.Errors.Check();
+                templateContext.Errors.Check();
             }
 
             return result;
@@ -237,11 +286,11 @@ namespace GitHub.Runner.Worker
             string result = "";
             if (token != null)
             {
-                var context = CreateContext(executionContext);
+                var templateContext = CreateTemplateContext(executionContext);
                 try
                 {
-                    var evaluateResult = TemplateEvaluator.Evaluate(context, "input-default-context", token, 0, null, omitHeader: true);
-                    context.Errors.Check();
+                    var evaluateResult = TemplateEvaluator.Evaluate(templateContext, "input-default-context", token, 0, null, omitHeader: true);
+                    templateContext.Errors.Check();
 
                     Trace.Info($"Input '{inputName}': default value evaluate result: {StringUtil.ConvertToJson(evaluateResult)}");
 
@@ -251,16 +300,16 @@ namespace GitHub.Runner.Worker
                 catch (Exception ex) when (!(ex is TemplateValidationException))
                 {
                     Trace.Error(ex);
-                    context.Errors.Add(ex);
+                    templateContext.Errors.Add(ex);
                 }
 
-                context.Errors.Check();
+                templateContext.Errors.Check();
             }
 
             return result;
         }
 
-        private TemplateContext CreateContext(
+        private TemplateContext CreateTemplateContext(
             IExecutionContext executionContext,
             IDictionary<string, PipelineContextData> extraExpressionValues = null)
         {
@@ -298,9 +347,9 @@ namespace GitHub.Runner.Worker
             }
 
             // Add the file table from the Execution Context
-            for (var i = 0; i < executionContext.FileTable.Count; i++)
+            for (var i = 0; i < executionContext.Global.FileTable.Count; i++)
             {
-                result.GetFileId(executionContext.FileTable[i]);
+                result.GetFileId(executionContext.Global.FileTable[i]);
             }
 
             return result;
@@ -308,8 +357,10 @@ namespace GitHub.Runner.Worker
 
         private ActionExecutionData ConvertRuns(
             IExecutionContext executionContext,
-            TemplateContext context,
-            TemplateToken inputsToken)
+            TemplateContext templateContext,
+            TemplateToken inputsToken,
+            String fileRelativePath,
+            MappingToken outputs = null)
         {
             var runsMapping = inputsToken.AssertMapping("runs");
             var usingToken = default(StringToken);
@@ -325,7 +376,7 @@ namespace GitHub.Runner.Worker
             var postToken = default(StringToken);
             var postEntrypointToken = default(StringToken);
             var postIfToken = default(StringToken);
-            var stepsLoaded = default(List<Pipelines.ActionStep>);
+            var steps = default(List<Pipelines.Step>);
 
             foreach (var run in runsMapping)
             {
@@ -374,9 +425,9 @@ namespace GitHub.Runner.Worker
                     case "steps":
                         if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable("TESTING_COMPOSITE_ACTIONS_ALPHA")))
                         {
-                            var steps = run.Value.AssertSequence("steps");
-                            var evaluator = executionContext.ToPipelineTemplateEvaluator();
-                            stepsLoaded = evaluator.LoadCompositeSteps(steps);
+                            var stepsToken = run.Value.AssertSequence("steps");
+                            steps = PipelineTemplateConverter.ConvertToSteps(templateContext, stepsToken);
+                            templateContext.Errors.Check();
                             break;
                         }
                         throw new Exception("You aren't supposed to be using Composite Actions yet!");
@@ -392,7 +443,7 @@ namespace GitHub.Runner.Worker
                 {
                     if (string.IsNullOrEmpty(imageToken?.Value))
                     {
-                        throw new ArgumentNullException($"Image is not provided.");
+                        throw new ArgumentNullException($"You are using a Container Action but an image is not provided in {fileRelativePath}.");
                     }
                     else
                     {
@@ -413,7 +464,7 @@ namespace GitHub.Runner.Worker
                 {
                     if (string.IsNullOrEmpty(mainToken?.Value))
                     {
-                        throw new ArgumentNullException($"Entry javascript file is not provided.");
+                        throw new ArgumentNullException($"You are using a JavaScript Action but there is not an entry JavaScript file provided in {fileRelativePath}.");
                     }
                     else
                     {
@@ -429,16 +480,16 @@ namespace GitHub.Runner.Worker
                 }
                 else if (string.Equals(usingToken.Value, "composite", StringComparison.OrdinalIgnoreCase) && !string.IsNullOrEmpty(Environment.GetEnvironmentVariable("TESTING_COMPOSITE_ACTIONS_ALPHA")))
                 {
-                    if (stepsLoaded == null)
+                    if (steps == null)
                     {
-                        // TODO: Add a more helpful error message + including file name, etc. to show user that it's because of their yaml file
-                        throw new ArgumentNullException($"No steps provided.");
+                        throw new ArgumentNullException($"You are using a composite action but there are no steps provided in {fileRelativePath}.");
                     }
                     else
                     {
                         return new CompositeActionExecutionData()
                         {
-                            Steps = stepsLoaded,
+                            Steps = steps.Cast<Pipelines.ActionStep>().ToList(),
+                            Outputs = outputs
                         };
                     }
                 }
@@ -459,7 +510,6 @@ namespace GitHub.Runner.Worker
         }
 
         private void ConvertInputs(
-            TemplateContext context,
             TemplateToken inputsToken,
             ActionDefinitionData actionDefinition)
         {

src/Runner.Worker/ActionRunner.cs

@@ -136,12 +136,12 @@ namespace GitHub.Runner.Worker
             }
 
             // Setup container stephost for running inside the container.
-            if (ExecutionContext.Container != null)
+            if (ExecutionContext.Global.Container != null)
             {
                 // Make sure required container is already created.
-                ArgUtil.NotNullOrEmpty(ExecutionContext.Container.ContainerId, nameof(ExecutionContext.Container.ContainerId));
+                ArgUtil.NotNullOrEmpty(ExecutionContext.Global.Container.ContainerId, nameof(ExecutionContext.Global.Container.ContainerId));
                 var containerStepHost = HostContext.CreateService<IContainerStepHost>();
-                containerStepHost.Container = ExecutionContext.Container;
+                containerStepHost.Container = ExecutionContext.Global.Container;
                 stepHost = containerStepHost;
             }
 
@@ -231,7 +231,7 @@ namespace GitHub.Runner.Worker
                             handlerData,
                             inputs,
                             environment,
-                            ExecutionContext.Variables,
+                            ExecutionContext.Global.Variables,
                             actionDirectory: definition.Directory);
 
             // Print out action details

src/Runner.Worker/ContainerOperationProvider.cs

@@ -91,7 +91,10 @@ namespace GitHub.Runner.Worker
 #endif
 
             // Check docker client/server version
+            executionContext.Output("##[group]Checking docker version");
             DockerVersion dockerVersion = await _dockerManger.DockerVersion(executionContext);
+            executionContext.Output("##[endgroup]");
+
             ArgUtil.NotNull(dockerVersion.ServerVersion, nameof(dockerVersion.ServerVersion));
             ArgUtil.NotNull(dockerVersion.ClientVersion, nameof(dockerVersion.ClientVersion));
 
@@ -111,7 +114,7 @@ namespace GitHub.Runner.Worker
             }
 
             // Clean up containers left by previous runs
-            executionContext.Debug($"Delete stale containers from previous jobs");
+            executionContext.Output("##[group]Clean up resources from previous jobs");
             var staleContainers = await _dockerManger.DockerPS(executionContext, $"--all --quiet --no-trunc --filter \"label={_dockerManger.DockerInstanceLabel}\"");
             foreach (var staleContainer in staleContainers)
             {
@@ -122,18 +125,25 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            executionContext.Debug($"Delete stale container networks from previous jobs");
             int networkPruneExitCode = await _dockerManger.DockerNetworkPrune(executionContext);
             if (networkPruneExitCode != 0)
             {
                 executionContext.Warning($"Delete stale container networks failed, docker network prune fail with exit code {networkPruneExitCode}");
             }
+            executionContext.Output("##[endgroup]");
 
             // Create local docker network for this job to avoid port conflict when multiple runners run on same machine.
             // All containers within a job join the same network
+            executionContext.Output("##[group]Create local container network");
             var containerNetwork = $"github_network_{Guid.NewGuid().ToString("N")}";
             await CreateContainerNetworkAsync(executionContext, containerNetwork);
             executionContext.JobContext.Container["network"] = new StringContextData(containerNetwork);
+            executionContext.Output("##[endgroup]");
+
+            if (Environment.GetEnvironmentVariable("K8S_POD_NAME") != null)
+            {
+                IOUtil.CopyDirectory(HostContext.GetDirectory(WellKnownDirectory.Externals), Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), "__externals_copy"), CancellationToken.None);
+            }
 
             foreach (var container in containers)
             {
@@ -141,10 +151,12 @@ namespace GitHub.Runner.Worker
                 await StartContainerAsync(executionContext, container);
             }
 
+            executionContext.Output("##[group]Waiting for all services to be ready");
             foreach (var container in containers.Where(c => !c.IsJobContainer))
             {
                 await ContainerHealthcheck(executionContext, container);
             }
+            executionContext.Output("##[endgroup]");
         }
 
         public async Task StopContainersAsync(IExecutionContext executionContext, object data)
@@ -173,6 +185,10 @@ namespace GitHub.Runner.Worker
             Trace.Info($"Container name: {container.ContainerName}");
             Trace.Info($"Container image: {container.ContainerImage}");
             Trace.Info($"Container options: {container.ContainerCreateOptions}");
+
+            var groupName = container.IsJobContainer ? "Starting job container" : $"Starting {container.ContainerNetworkAlias} service container";
+            executionContext.Output($"##[group]{groupName}");
+
             foreach (var port in container.UserPortMappings)
             {
                 Trace.Info($"User provided port: {port.Value}");
@@ -225,7 +241,14 @@ namespace GitHub.Runner.Worker
 #if OS_WINDOWS
                 container.MountVolumes.Add(new MountVolume(HostContext.GetDirectory(WellKnownDirectory.Externals), container.TranslateToContainerPath(HostContext.GetDirectory(WellKnownDirectory.Externals))));
 #else
-                container.MountVolumes.Add(new MountVolume(HostContext.GetDirectory(WellKnownDirectory.Externals), container.TranslateToContainerPath(HostContext.GetDirectory(WellKnownDirectory.Externals)), true));
+                if (Environment.GetEnvironmentVariable("K8S_POD_NAME") != null)
+                {
+                    container.MountVolumes.Add(new MountVolume(Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), "__externals_copy"), container.TranslateToContainerPath(HostContext.GetDirectory(WellKnownDirectory.Externals)), true));
+                }
+                else
+                {
+                    container.MountVolumes.Add(new MountVolume(HostContext.GetDirectory(WellKnownDirectory.Externals), container.TranslateToContainerPath(HostContext.GetDirectory(WellKnownDirectory.Externals)), true));
+                }
 #endif
                 container.MountVolumes.Add(new MountVolume(HostContext.GetDirectory(WellKnownDirectory.Temp), container.TranslateToContainerPath(HostContext.GetDirectory(WellKnownDirectory.Temp))));
                 container.MountVolumes.Add(new MountVolume(HostContext.GetDirectory(WellKnownDirectory.Actions), container.TranslateToContainerPath(HostContext.GetDirectory(WellKnownDirectory.Actions))));
@@ -304,6 +327,7 @@ namespace GitHub.Runner.Worker
                 container.ContainerRuntimePath = DockerUtil.ParsePathFromConfigEnv(containerEnv);
                 executionContext.JobContext.Container["id"] = new StringContextData(container.ContainerId);
             }
+            executionContext.Output("##[endgroup]");
         }
 
         private async Task StopContainerAsync(IExecutionContext executionContext, ContainerInfo container)

src/Runner.Worker/DiagnosticLogManager.cs

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

src/Runner.Worker/ExecutionContext.cs

@@ -6,6 +6,7 @@ using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Text;
+using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Web;
@@ -43,23 +44,12 @@ namespace GitHub.Runner.Worker
         string ResultCode { get; set; }
         TaskResult? CommandResult { get; set; }
         CancellationToken CancellationToken { get; }
-        List<ServiceEndpoint> Endpoints { get; }
-        TaskOrchestrationPlanReference Plan { get; }
+        GlobalContext Global { get; }
 
-        PlanFeatures Features { get; }
-        Variables Variables { get; }
         Dictionary<string, string> IntraActionState { get; }
-        IDictionary<String, IDictionary<String, String>> JobDefaults { get; }
         Dictionary<string, VariableValue> JobOutputs { get; }
-        IDictionary<String, String> EnvironmentVariables { get; }
-        IDictionary<String, ContextScope> Scopes { get; }
-        IList<String> FileTable { get; }
-        StepsContext StepsContext { get; }
         DictionaryContextData ExpressionValues { get; }
         IList<IFunctionInfo> ExpressionFunctions { get; }
-        List<string> PrependPath { get; }
-        ContainerInfo Container { get; set; }
-        List<ContainerInfo> ServiceContainers { get; }
         JobContext JobContext { get; }
 
         // Only job level ExecutionContext has JobSteps
@@ -70,13 +60,14 @@ namespace GitHub.Runner.Worker
 
         bool EchoOnActionCommand { get; set; }
 
+        ExecutionContext Root { get; }
+
         // Initialize
         void InitializeJob(Pipelines.AgentJobRequestMessage message, CancellationToken token);
         void CancelToken();
-        IExecutionContext CreateChild(Guid recordId, string displayName, string refName, string scopeName, string contextName, Dictionary<string, string> intraActionState = null, int? recordOrder = null);
+        IExecutionContext CreateChild(Guid recordId, string displayName, string refName, string scopeName, string contextName, Dictionary<string, string> intraActionState = null, int? recordOrder = null, IPagingLogger logger = null, CancellationTokenSource cancellationTokenSource = null);
 
         // logging
-        bool WriteDebug { get; }
         long Write(string tag, string message);
         void QueueAttachFile(string type, string name, string filePath);
 
@@ -105,7 +96,7 @@ namespace GitHub.Runner.Worker
         // others
         void ForceTaskComplete();
         void RegisterPostJobStep(IStep step);
-        void RegisterNestedStep(IStep step, DictionaryContextData inputsData, int location, Dictionary<string, string> envData);
+        IStep CreateCompositeStep(string scopeName, IActionRunner step, DictionaryContextData inputsData, Dictionary<string, string> envData);
     }
 
     public sealed class ExecutionContext : RunnerService, IExecutionContext
@@ -142,22 +133,13 @@ namespace GitHub.Runner.Worker
         public string ContextName { get; private set; }
         public Task ForceCompleted => _forceCompleted.Task;
         public CancellationToken CancellationToken => _cancellationTokenSource.Token;
-        public List<ServiceEndpoint> Endpoints { get; private set; }
-        public TaskOrchestrationPlanReference Plan { get; private set; }
-        public Variables Variables { get; private set; }
         public Dictionary<string, string> IntraActionState { get; private set; }
-        public IDictionary<String, IDictionary<String, String>> JobDefaults { get; private set; }
         public Dictionary<string, VariableValue> JobOutputs { get; private set; }
-        public IDictionary<String, String> EnvironmentVariables { get; private set; }
-        public IDictionary<String, ContextScope> Scopes { get; private set; }
-        public IList<String> FileTable { get; private set; }
-        public StepsContext StepsContext { get; private set; }
         public DictionaryContextData ExpressionValues { get; } = new DictionaryContextData();
         public IList<IFunctionInfo> ExpressionFunctions { get; } = new List<IFunctionInfo>();
-        public bool WriteDebug { get; private set; }
-        public List<string> PrependPath { get; private set; }
-        public ContainerInfo Container { get; set; }
-        public List<ContainerInfo> ServiceContainers { get; private set; }
+
+        // Shared pointer across job-level execution context and step-level execution contexts
+        public GlobalContext Global { get; private set; }
 
         // Only job level ExecutionContext has JobSteps
         public List<IStep> JobSteps { get; private set; }
@@ -200,9 +182,7 @@ namespace GitHub.Runner.Worker
             }
         }
 
-        public PlanFeatures Features { get; private set; }
-
-        private ExecutionContext Root
+        public ExecutionContext Root
         {
             get
             {
@@ -270,17 +250,17 @@ namespace GitHub.Runner.Worker
         /// Helper function used in CompositeActionHandler::RunAsync to
         /// add a child node, aka a step, to the current job to the Root.JobSteps based on the location. 
         /// </summary>
-        public void RegisterNestedStep(IStep step, DictionaryContextData inputsData, int location, Dictionary<string, string> envData)
+        public IStep CreateCompositeStep(
+            string scopeName,
+            IActionRunner step,
+            DictionaryContextData inputsData,
+            Dictionary<string, string> envData)
         {
-            // TODO: For UI purposes, look at figuring out how to condense steps in one node => maybe use the same previous GUID
-            var newGuid = Guid.NewGuid();
-            step.ExecutionContext = Root.CreateChild(newGuid, step.DisplayName, newGuid.ToString("N"), null, null);
+            step.ExecutionContext = Root.CreateChild(_record.Id, step.DisplayName, _record.Id.ToString("N"), scopeName, step.Action.ContextName, logger: _logger, cancellationTokenSource: CancellationTokenSource.CreateLinkedTokenSource(_cancellationTokenSource.Token));
             step.ExecutionContext.ExpressionValues["inputs"] = inputsData;
+            step.ExecutionContext.ExpressionValues["steps"] = Global.StepsContext.GetScope(step.ExecutionContext.GetFullyQualifiedContextName());
 
             // Add the composite action environment variables to each step.
-            // If the key already exists, we override it since the composite action env variables will have higher precedence
-            // Note that for each composite action step, it's environment variables will be set in the StepRunner automatically
-            // step.ExecutionContext.SetEnvironmentVariables(envData);
 #if OS_WINDOWS
             var envContext = new DictionaryContextData();
 #else
@@ -292,21 +272,18 @@ namespace GitHub.Runner.Worker
             }
             step.ExecutionContext.ExpressionValues["env"] = envContext;
 
-            Root.JobSteps.Insert(location, step);
+            return step;
         }
 
-        public IExecutionContext CreateChild(Guid recordId, string displayName, string refName, string scopeName, string contextName, Dictionary<string, string> intraActionState = null, int? recordOrder = null)
+        public IExecutionContext CreateChild(Guid recordId, string displayName, string refName, string scopeName, string contextName, Dictionary<string, string> intraActionState = null, int? recordOrder = null, IPagingLogger logger = null, CancellationTokenSource cancellationTokenSource = null)
         {
             Trace.Entering();
 
             var child = new ExecutionContext();
             child.Initialize(HostContext);
+            child.Global = Global;
             child.ScopeName = scopeName;
             child.ContextName = contextName;
-            child.Features = Features;
-            child.Variables = Variables;
-            child.Endpoints = Endpoints;
-            child.Plan = Plan;
             if (intraActionState == null)
             {
                 child.IntraActionState = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
@@ -315,11 +292,6 @@ namespace GitHub.Runner.Worker
             {
                 child.IntraActionState = intraActionState;
             }
-            child.EnvironmentVariables = EnvironmentVariables;
-            child.JobDefaults = JobDefaults;
-            child.Scopes = Scopes;
-            child.FileTable = FileTable;
-            child.StepsContext = StepsContext;
             foreach (var pair in ExpressionValues)
             {
                 child.ExpressionValues[pair.Key] = pair.Value;
@@ -328,12 +300,8 @@ namespace GitHub.Runner.Worker
             {
                 child.ExpressionFunctions.Add(item);
             }
-            child._cancellationTokenSource = new CancellationTokenSource();
-            child.WriteDebug = WriteDebug;
+            child._cancellationTokenSource = cancellationTokenSource ?? new CancellationTokenSource();
             child._parentExecutionContext = this;
-            child.PrependPath = PrependPath;
-            child.Container = Container;
-            child.ServiceContainers = ServiceContainers;
             child.EchoOnActionCommand = EchoOnActionCommand;
 
             if (recordOrder != null)
@@ -344,9 +312,15 @@ namespace GitHub.Runner.Worker
             {
                 child.InitializeTimelineRecord(_mainTimelineId, recordId, _record.Id, ExecutionContextType.Task, displayName, refName, ++_childTimelineRecordOrder);
             }
-
-            child._logger = HostContext.CreateService<IPagingLogger>();
-            child._logger.Setup(_mainTimelineId, recordId);
+            if (logger != null)
+            {
+                child._logger = logger;
+            }
+            else
+            {
+                child._logger = HostContext.CreateService<IPagingLogger>();
+                child._logger.Setup(_mainTimelineId, recordId);
+            }
 
             return child;
         }
@@ -404,10 +378,11 @@ namespace GitHub.Runner.Worker
 
             _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 "__"
             if (!string.IsNullOrEmpty(ContextName))
             {
-                StepsContext.SetOutcome(ScopeName, ContextName, (Outcome ?? Result ?? TaskResult.Succeeded).ToActionResult());
-                StepsContext.SetConclusion(ScopeName, ContextName, (Result ?? TaskResult.Succeeded).ToActionResult());
+                Global.StepsContext.SetOutcome(ScopeName, ContextName, (Outcome ?? Result ?? TaskResult.Succeeded).ToActionResult());
+                Global.StepsContext.SetConclusion(ScopeName, ContextName, (Result ?? TaskResult.Succeeded).ToActionResult());
             }
 
             return Result.Value;
@@ -466,7 +441,8 @@ namespace GitHub.Runner.Worker
         {
             ArgUtil.NotNullOrEmpty(name, nameof(name));
 
-            if (String.IsNullOrEmpty(ContextName))
+            // todo: Skip if generated context name. After M271-ish the server will never send an empty context name. Generated context names will start with "__"
+            if (string.IsNullOrEmpty(ContextName))
             {
                 reference = null;
                 return;
@@ -474,7 +450,7 @@ namespace GitHub.Runner.Worker
 
             // todo: restrict multiline?
 
-            StepsContext.SetOutput(ScopeName, ContextName, name, value, out reference);
+            Global.StepsContext.SetOutput(ScopeName, ContextName, name, value, out reference);
         }
 
         public void SetTimeout(TimeSpan? timeout)
@@ -608,43 +584,35 @@ namespace GitHub.Runner.Worker
 
             _cancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(token);
 
+            Global = new GlobalContext();
+
             // Plan
-            Plan = message.Plan;
-            Features = PlanUtil.GetFeatures(message.Plan);
+            Global.Plan = message.Plan;
+            Global.Features = PlanUtil.GetFeatures(message.Plan);
 
             // Endpoints
-            Endpoints = message.Resources.Endpoints;
+            Global.Endpoints = message.Resources.Endpoints;
 
             // Variables
-            Variables = new Variables(HostContext, message.Variables);
+            Global.Variables = new Variables(HostContext, message.Variables);
 
             // Environment variables shared across all actions
-            EnvironmentVariables = new Dictionary<string, string>(VarUtil.EnvironmentVariableKeyComparer);
+            Global.EnvironmentVariables = new Dictionary<string, string>(VarUtil.EnvironmentVariableKeyComparer);
 
             // Job defaults shared across all actions
-            JobDefaults = new Dictionary<string, IDictionary<string, string>>(StringComparer.OrdinalIgnoreCase);
+            Global.JobDefaults = new Dictionary<string, IDictionary<string, string>>(StringComparer.OrdinalIgnoreCase);
 
             // Job Outputs
             JobOutputs = new Dictionary<string, VariableValue>(StringComparer.OrdinalIgnoreCase);
 
             // Service container info
-            ServiceContainers = new List<ContainerInfo>();
+            Global.ServiceContainers = new List<ContainerInfo>();
 
             // Steps context (StepsRunner manages adding the scoped steps context)
-            StepsContext = new StepsContext();
-
-            // Scopes
-            Scopes = new Dictionary<String, ContextScope>(StringComparer.OrdinalIgnoreCase);
-            if (message.Scopes?.Count > 0)
-            {
-                foreach (var scope in message.Scopes)
-                {
-                    Scopes[scope.Name] = scope;
-                }
-            }
+            Global.StepsContext = new StepsContext();
 
             // File table
-            FileTable = new List<String>(message.FileTable ?? new string[0]);
+            Global.FileTable = new List<String>(message.FileTable ?? new string[0]);
 
             // Expression values
             if (message.ContextData?.Count > 0)
@@ -655,15 +623,15 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            ExpressionValues["secrets"] = Variables.ToSecretsContext();
+            ExpressionValues["secrets"] = Global.Variables.ToSecretsContext();
             ExpressionValues["runner"] = new RunnerContext();
             ExpressionValues["job"] = new JobContext();
 
             Trace.Info("Initialize GitHub context");
-            var githubAccessToken = new StringContextData(Variables.Get("system.github.token"));
+            var githubAccessToken = new StringContextData(Global.Variables.Get("system.github.token"));
             var base64EncodedToken = Convert.ToBase64String(Encoding.UTF8.GetBytes($"x-access-token:{githubAccessToken}"));
             HostContext.SecretMasker.AddValue(base64EncodedToken);
-            var githubJob = Variables.Get("system.github.job");
+            var githubJob = Global.Variables.Get("system.github.job");
             var githubContext = new GitHubContext();
             githubContext["token"] = githubAccessToken;
             if (!string.IsNullOrEmpty(githubJob))
@@ -686,7 +654,7 @@ namespace GitHub.Runner.Worker
 #endif
 
             // Prepend Path
-            PrependPath = new List<string>();
+            Global.PrependPath = new List<string>();
 
             // JobSteps for job ExecutionContext
             JobSteps = new List<IStep>();
@@ -712,10 +680,10 @@ namespace GitHub.Runner.Worker
             _logger.Setup(_mainTimelineId, _record.Id);
 
             // Initialize 'echo on action command success' property, default to false, unless Step_Debug is set
-            EchoOnActionCommand = Variables.Step_Debug ?? false;
+            EchoOnActionCommand = Global.Variables.Step_Debug ?? false;
 
             // Verbosity (from GitHub.Step_Debug).
-            WriteDebug = Variables.Step_Debug ?? false;
+            Global.WriteDebug = Global.Variables.Step_Debug ?? false;
 
             // Hook up JobServerQueueThrottling event, we will log warning on server tarpit.
             _jobServerQueue.JobServerQueueThrottling += JobServerQueueThrottling_EventReceived;
@@ -916,6 +884,16 @@ namespace GitHub.Runner.Worker
     // Otherwise individual overloads would need to be implemented (depending on the unit test).
     public static class ExecutionContextExtension
     {
+        public static string GetFullyQualifiedContextName(this IExecutionContext context)
+        {
+            if (!string.IsNullOrEmpty(context.ScopeName))
+            {
+                return $"{context.ScopeName}.{context.ContextName}";
+            }
+
+            return context.ContextName;
+        }
+
         public static void Error(this IExecutionContext context, Exception ex)
         {
             context.Error(ex.Message);
@@ -954,7 +932,7 @@ namespace GitHub.Runner.Worker
         // Do not add a format string overload. See comment on ExecutionContext.Write().
         public static void Debug(this IExecutionContext context, string message)
         {
-            if (context.WriteDebug)
+            if (context.Global.WriteDebug)
             {
                 var multilines = message?.Replace("\r\n", "\n")?.Split("\n");
                 if (multilines != null)
@@ -979,7 +957,7 @@ namespace GitHub.Runner.Worker
                 traceWriter = context.ToTemplateTraceWriter();
             }
             var schema = PipelineTemplateSchemaFactory.GetSchema();
-            return new PipelineTemplateEvaluator(traceWriter, schema, context.FileTable);
+            return new PipelineTemplateEvaluator(traceWriter, schema, context.Global.FileTable);
         }
 
         public static ObjectTemplating.ITraceWriter ToTemplateTraceWriter(this IExecutionContext context)

src/Runner.Worker/GlobalContext.cs

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

src/Runner.Worker/Handlers/CompositeActionHandler.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using GitHub.DistributedTask.ObjectTemplating.Tokens;
 using GitHub.DistributedTask.Pipelines.ContextData;
@@ -23,18 +24,17 @@ namespace GitHub.Runner.Worker.Handlers
     {
         public CompositeActionExecutionData Data { get; set; }
 
-        public Task RunAsync(ActionRunStage stage)
+        public async Task RunAsync(ActionRunStage stage)
         {
             // Validate args.
             Trace.Entering();
             ArgUtil.NotNull(ExecutionContext, nameof(ExecutionContext));
             ArgUtil.NotNull(Inputs, nameof(Inputs));
+            ArgUtil.NotNull(Data.Steps, nameof(Data.Steps));
 
             var githubContext = ExecutionContext.ExpressionValues["github"] as GitHubContext;
             ArgUtil.NotNull(githubContext, nameof(githubContext));
 
-            var tempDirectory = HostContext.GetDirectory(WellKnownDirectory.Temp);
-
             // Resolve action steps
             var actionSteps = Data.Steps;
 
@@ -45,52 +45,231 @@ namespace GitHub.Runner.Worker.Handlers
                 inputsData[i.Key] = new StringContextData(i.Value);
             }
 
-            // Add each composite action step to the front of the queue
-            int location = 0;
-            foreach (Pipelines.ActionStep aStep in actionSteps)
+            // Initialize Composite Steps List of Steps
+            var compositeSteps = new List<IStep>();
+
+            // Temporary hack until after M271-ish. After M271-ish the server will never send an empty
+            // context name. Generated context names start with "__"
+            var childScopeName = ExecutionContext.GetFullyQualifiedContextName();
+            if (string.IsNullOrEmpty(childScopeName))
             {
-                // Ex: 
-                // runs:
-                //      using: "composite"
-                //      steps:
-                //          - uses: example/test-composite@v2 (a)
-                //          - run echo hello world (b)
-                //          - run echo hello world 2 (c)
-                // 
-                // ethanchewy/test-composite/action.yaml
-                // runs:
-                //      using: "composite"
-                //      steps: 
-                //          - run echo hello world 3 (d)
-                //          - run echo hello world 4 (e)
-                // 
-                // Steps processed as follow:
-                // | a |
-                // | a | => | d |
-                // (Run step d)
-                // | a | 
-                // | a | => | e |
-                // (Run step e)
-                // | a | 
-                // (Run step a)
-                // | b | 
-                // (Run step b)
-                // | c |
-                // (Run step c)
-                // Done.
-
-                var actionRunner = HostContext.CreateService<IActionRunner>();
-                actionRunner.Action = aStep;
-                actionRunner.Stage = stage;
-                actionRunner.Condition = aStep.Condition;
-                actionRunner.DisplayName = aStep.DisplayName;
-
-                ExecutionContext.RegisterNestedStep(actionRunner, inputsData, location, Environment);
-                location++;
+                childScopeName = $"__{Guid.NewGuid()}";
             }
 
-            return Task.CompletedTask;
+            foreach (Pipelines.ActionStep actionStep in actionSteps)
+            {
+                var actionRunner = HostContext.CreateService<IActionRunner>();
+                actionRunner.Action = actionStep;
+                actionRunner.Stage = stage;
+                actionRunner.Condition = actionStep.Condition;
+
+                var step = ExecutionContext.CreateCompositeStep(childScopeName, actionRunner, inputsData, Environment);
+                compositeSteps.Add(step);
+            }
+
+            try
+            {
+                // This is where we run each step.
+                await RunStepsAsync(compositeSteps);
+
+                // Get the pointer of the correct "steps" object and pass it to the ExecutionContext so that we can process the outputs correctly
+                ExecutionContext.ExpressionValues["inputs"] = inputsData;
+                ExecutionContext.ExpressionValues["steps"] = ExecutionContext.Global.StepsContext.GetScope(ExecutionContext.GetFullyQualifiedContextName());
+
+                ProcessCompositeActionOutputs();
+            }
+            catch (Exception ex)
+            {
+                // Composite StepRunner should never throw exception out.
+                Trace.Error($"Caught exception from composite steps {nameof(CompositeActionHandler)}: {ex}");
+                ExecutionContext.Error(ex);
+                ExecutionContext.Result = TaskResult.Failed;
+            }
         }
 
+        private void ProcessCompositeActionOutputs()
+        {
+            ArgUtil.NotNull(ExecutionContext, nameof(ExecutionContext));
+
+            // Evaluate the mapped outputs value
+            if (Data.Outputs != null)
+            {
+                // Evaluate the outputs in the steps context to easily retrieve the values
+                var actionManifestManager = HostContext.GetService<IActionManifestManager>();
+
+                // Format ExpressionValues to Dictionary<string, PipelineContextData>
+                var evaluateContext = new Dictionary<string, PipelineContextData>(StringComparer.OrdinalIgnoreCase);
+                foreach (var pair in ExecutionContext.ExpressionValues)
+                {
+                    evaluateContext[pair.Key] = pair.Value;
+                }
+
+                // Get the evluated composite outputs' values mapped to the outputs named
+                DictionaryContextData actionOutputs = actionManifestManager.EvaluateCompositeOutputs(ExecutionContext, Data.Outputs, evaluateContext);
+
+                // Set the outputs for the outputs object in the whole composite action
+                // Each pair is structured like this
+                // We ignore "description" for now
+                // {
+                //   "the-output-name": {
+                //     "description": "",
+                //     "value": "the value"
+                //   },
+                //   ...
+                // }
+                foreach (var pair in actionOutputs)
+                {
+                    var outputsName = pair.Key;
+                    var outputsAttributes = pair.Value as DictionaryContextData;
+                    outputsAttributes.TryGetValue("value", out var val);
+                    var outputsValue = val as StringContextData;
+
+                    // Set output in the whole composite scope. 
+                    if (!String.IsNullOrEmpty(outputsName) && !String.IsNullOrEmpty(outputsValue))
+                    {
+                        ExecutionContext.SetOutput(outputsName, outputsValue, out _);
+                    }
+                }
+            }
+        }
+
+        private async Task RunStepsAsync(List<IStep> compositeSteps)
+        {
+            ArgUtil.NotNull(compositeSteps, nameof(compositeSteps));
+
+            // The parent StepsRunner of the whole Composite Action Step handles the cancellation stuff already. 
+            foreach (IStep step in compositeSteps)
+            {
+                Trace.Info($"Processing composite step: DisplayName='{step.DisplayName}'");
+
+                step.ExecutionContext.ExpressionValues["steps"] = ExecutionContext.Global.StepsContext.GetScope(step.ExecutionContext.ScopeName);
+
+                // Populate env context for each step
+                Trace.Info("Initialize Env context for step");
+#if OS_WINDOWS
+                var envContext = new DictionaryContextData();
+#else
+                var envContext = new CaseSensitiveDictionaryContextData();
+#endif
+
+                // Global env
+                foreach (var pair in ExecutionContext.Global.EnvironmentVariables)
+                {
+                    envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
+                }
+
+                // Stomps over with outside step env
+                if (step.ExecutionContext.ExpressionValues.TryGetValue("env", out var envContextData))
+                {
+#if OS_WINDOWS
+                    var dict = envContextData as DictionaryContextData;
+#else
+                    var dict = envContextData as CaseSensitiveDictionaryContextData;
+#endif
+                    foreach (var pair in dict)
+                    {
+                        envContext[pair.Key] = pair.Value;
+                    }
+                }
+
+                step.ExecutionContext.ExpressionValues["env"] = envContext;
+
+                var actionStep = step as IActionRunner;
+
+                // Set GITHUB_ACTION
+                step.ExecutionContext.SetGitHubContext("action", step.ExecutionContext.GetFullyQualifiedContextName());
+
+                try
+                {
+                    // Evaluate and merge action's env block to env context
+                    var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator();
+                    var actionEnvironment = templateEvaluator.EvaluateStepEnvironment(actionStep.Action.Environment, step.ExecutionContext.ExpressionValues, step.ExecutionContext.ExpressionFunctions, Common.Util.VarUtil.EnvironmentVariableKeyComparer);
+                    foreach (var env in actionEnvironment)
+                    {
+                        envContext[env.Key] = new StringContextData(env.Value ?? string.Empty);
+                    }
+                }
+                catch (Exception ex)
+                {
+                    // fail the step since there is an evaluate error.
+                    Trace.Info("Caught exception in Composite Steps Runner from expression for step.env");
+                    // evaluateStepEnvFailed = true;
+                    step.ExecutionContext.Error(ex);
+                    step.ExecutionContext.Complete(TaskResult.Failed);
+                }
+
+                await RunStepAsync(step);
+
+                // Directly after the step, check if the step has failed or cancelled
+                // If so, return that to the output
+                if (step.ExecutionContext.Result == TaskResult.Failed || step.ExecutionContext.Result == TaskResult.Canceled)
+                {
+                    ExecutionContext.Result = step.ExecutionContext.Result;
+                    break;
+                }
+
+                // TODO: Add compat for other types of steps.
+            }
+            // Completion Status handled by StepsRunner for the whole Composite Action Step
+        }
+
+        private async Task RunStepAsync(IStep step)
+        {
+            // Try to evaluate the display name
+            if (step is IActionRunner actionRunner && actionRunner.Stage == ActionRunStage.Main)
+            {
+                actionRunner.TryEvaluateDisplayName(step.ExecutionContext.ExpressionValues, step.ExecutionContext);
+            }
+
+            // Start the step.
+            Trace.Info("Starting the step.");
+            step.ExecutionContext.Debug($"Starting: {step.DisplayName}");
+
+            // TODO: Fix for Step Level Timeout Attributes for an individual Composite Run Step
+            // For now, we are not going to support this for an individual composite run step
+
+            var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator();
+
+            await Common.Util.EncodingUtil.SetEncoding(HostContext, Trace, step.ExecutionContext.CancellationToken);
+
+            try
+            {
+                await step.RunAsync();
+            }
+            catch (OperationCanceledException ex)
+            {
+                if (step.ExecutionContext.CancellationToken.IsCancellationRequested &&
+                    !ExecutionContext.Root.CancellationToken.IsCancellationRequested)
+                {
+                    Trace.Error($"Caught timeout exception from step: {ex.Message}");
+                    step.ExecutionContext.Error("The action has timed out.");
+                    step.ExecutionContext.Result = TaskResult.Failed;
+                }
+                else
+                {
+                    Trace.Error($"Caught cancellation exception from step: {ex}");
+                    step.ExecutionContext.Error(ex);
+                    step.ExecutionContext.Result = TaskResult.Canceled;
+                }
+            }
+            catch (Exception ex)
+            {
+                // Log the error and fail the step.
+                Trace.Error($"Caught exception from step: {ex}");
+                step.ExecutionContext.Error(ex);
+                step.ExecutionContext.Result = TaskResult.Failed;
+            }
+
+            // Merge execution context result with command result
+            if (step.ExecutionContext.CommandResult != null)
+            {
+                step.ExecutionContext.Result = Common.Util.TaskResultUtil.MergeTaskResults(step.ExecutionContext.Result, step.ExecutionContext.CommandResult.Value);
+            }
+
+            Trace.Info($"Step result: {step.ExecutionContext.Result}");
+
+            // Complete the step context.
+            step.ExecutionContext.Debug($"Finishing: {step.DisplayName}");
+        }
     }
 }

src/Runner.Worker/Handlers/ContainerActionHandler.cs

@@ -49,8 +49,9 @@ namespace GitHub.Runner.Worker.Handlers
                 // ensure docker file exist
                 var dockerFile = Path.Combine(ActionDirectory, Data.Image);
                 ArgUtil.File(dockerFile, nameof(Data.Image));
-                ExecutionContext.Output($"Dockerfile for action: '{dockerFile}'.");
 
+                ExecutionContext.Output($"##[group]Building docker image");
+                ExecutionContext.Output($"Dockerfile for action: '{dockerFile}'.");
                 var imageName = $"{dockerManger.DockerInstanceLabel}:{ExecutionContext.Id.ToString("N")}";
                 var buildExitCode = await dockerManger.DockerBuild(
                     ExecutionContext,
@@ -58,6 +59,8 @@ namespace GitHub.Runner.Worker.Handlers
                     dockerFile,
                     Directory.GetParent(dockerFile).FullName,
                     imageName);
+                ExecutionContext.Output("##[endgroup]");
+
                 if (buildExitCode != 0)
                 {
                     throw new InvalidOperationException($"Docker build failed with exit code {buildExitCode}");
@@ -185,7 +188,7 @@ namespace GitHub.Runner.Worker.Handlers
             }
 
             // Add Actions Runtime server info
-            var systemConnection = ExecutionContext.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
+            var systemConnection = ExecutionContext.Global.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
             Environment["ACTIONS_RUNTIME_URL"] = systemConnection.Url.AbsoluteUri;
             Environment["ACTIONS_RUNTIME_TOKEN"] = systemConnection.Authorization.Parameters[EndpointAuthorizationParameters.AccessToken];
             if (systemConnection.Data.TryGetValue("CacheServerUrl", out var cacheUrl) && !string.IsNullOrEmpty(cacheUrl))

src/Runner.Worker/Handlers/Handler.cs

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

src/Runner.Worker/Handlers/NodeScriptActionHandler.cs

@@ -46,7 +46,7 @@ namespace GitHub.Runner.Worker.Handlers
             }
 
             // Add Actions Runtime server info
-            var systemConnection = ExecutionContext.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
+            var systemConnection = ExecutionContext.Global.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
             Environment["ACTIONS_RUNTIME_URL"] = systemConnection.Url.AbsoluteUri;
             Environment["ACTIONS_RUNTIME_TOKEN"] = systemConnection.Authorization.Parameters[EndpointAuthorizationParameters.AccessToken];
             if (systemConnection.Data.TryGetValue("CacheServerUrl", out var cacheUrl) && !string.IsNullOrEmpty(cacheUrl))
@@ -82,6 +82,10 @@ namespace GitHub.Runner.Worker.Handlers
 
             var nodeRuntimeVersion = await StepHost.DetermineNodeRuntimeVersion(ExecutionContext);
             string file = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Externals), nodeRuntimeVersion, "bin", $"node{IOUtil.ExeExtension}");
+            if (System.Environment.GetEnvironmentVariable("K8S_POD_NAME") != null)
+            {
+                file = Path.Combine(Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Work), "__externals_copy"), nodeRuntimeVersion, "bin", $"node{IOUtil.ExeExtension}");
+            }
 
             // Format the arguments passed to node.
             // 1) Wrap the script file path in double quotes.
@@ -113,7 +117,7 @@ namespace GitHub.Runner.Worker.Handlers
                                                 requireExitCodeZero: false,
                                                 outputEncoding: outputEncoding,
                                                 killProcessOnCancel: false,
-                                                inheritConsoleHandler: !ExecutionContext.Variables.Retain_Default_Encoding,
+                                                inheritConsoleHandler: !ExecutionContext.Global.Variables.Retain_Default_Encoding,
                                                 cancellationToken: ExecutionContext.CancellationToken);
 
                 // Wait for either the node exit or force finish through ##vso command

src/Runner.Worker/Handlers/OutputManager.cs

@@ -31,7 +31,7 @@ namespace GitHub.Runner.Worker.Handlers
         {
             _executionContext = executionContext;
             _commandManager = commandManager;
-            _container = container ?? executionContext.Container;
+            _container = container ?? executionContext.Global.Container;
 
             // Recursion failsafe (test override)
             var failsafeString = Environment.GetEnvironmentVariable("RUNNER_TEST_GET_REPOSITORY_PATH_FAILSAFE");
@@ -41,7 +41,7 @@ namespace GitHub.Runner.Worker.Handlers
             }
 
             // Determine the timeout
-            var timeoutStr = _executionContext.Variables.Get(_timeoutKey);
+            var timeoutStr = _executionContext.Global.Variables.Get(_timeoutKey);
             if (string.IsNullOrEmpty(timeoutStr) ||
                 !TimeSpan.TryParse(timeoutStr, CultureInfo.InvariantCulture, out _timeout) ||
                 _timeout <= TimeSpan.Zero)

src/Runner.Worker/Handlers/ScriptHandler.cs

@@ -57,13 +57,13 @@ namespace GitHub.Runner.Worker.Handlers
             string shellCommand;
             string shellCommandPath = null;
             bool validateShellOnHost = !(StepHost is ContainerStepHost);
-            string prependPath = string.Join(Path.PathSeparator.ToString(), ExecutionContext.PrependPath.Reverse<string>());
+            string prependPath = string.Join(Path.PathSeparator.ToString(), ExecutionContext.Global.PrependPath.Reverse<string>());
             string shell = null;
             if (!Inputs.TryGetValue("shell", out shell) || string.IsNullOrEmpty(shell))
             {
                 // TODO: figure out how defaults interact with template later
                 // for now, we won't check job.defaults if we are inside a template.
-                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.JobDefaults.TryGetValue("run", out var runDefaults))
+                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.Global.JobDefaults.TryGetValue("run", out var runDefaults))
                 {
                     runDefaults.TryGetValue("shell", out shell);
                 }
@@ -153,7 +153,7 @@ namespace GitHub.Runner.Worker.Handlers
             {
                 // TODO: figure out how defaults interact with template later
                 // for now, we won't check job.defaults if we are inside a template.
-                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.JobDefaults.TryGetValue("run", out var runDefaults))
+                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.Global.JobDefaults.TryGetValue("run", out var runDefaults))
                 {
                     if (runDefaults.TryGetValue("working-directory", out workingDirectory))
                     {
@@ -169,7 +169,7 @@ namespace GitHub.Runner.Worker.Handlers
             {
                 // TODO: figure out how defaults interact with template later
                 // for now, we won't check job.defaults if we are inside a template.
-                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.JobDefaults.TryGetValue("run", out var runDefaults))
+                if (string.IsNullOrEmpty(ExecutionContext.ScopeName) && ExecutionContext.Global.JobDefaults.TryGetValue("run", out var runDefaults))
                 {
                     if (runDefaults.TryGetValue("shell", out shell))
                     {
@@ -180,7 +180,7 @@ namespace GitHub.Runner.Worker.Handlers
 
             var isContainerStepHost = StepHost is ContainerStepHost;
 
-            string prependPath = string.Join(Path.PathSeparator.ToString(), ExecutionContext.PrependPath.Reverse<string>());
+            string prependPath = string.Join(Path.PathSeparator.ToString(), ExecutionContext.Global.PrependPath.Reverse<string>());
             string commandPath, argFormat, shellCommand;
             // Set up default command and arguments
             if (string.IsNullOrEmpty(shell))
@@ -232,7 +232,7 @@ namespace GitHub.Runner.Worker.Handlers
 #if OS_WINDOWS
             // Normalize Windows line endings
             contents = contents.Replace("\r\n", "\n").Replace("\n", "\r\n");
-            var encoding = ExecutionContext.Variables.Retain_Default_Encoding && Console.InputEncoding.CodePage != 65001
+            var encoding = ExecutionContext.Global.Variables.Retain_Default_Encoding && Console.InputEncoding.CodePage != 65001
                 ? Console.InputEncoding
                 : new UTF8Encoding(false);
 #else
@@ -285,7 +285,7 @@ namespace GitHub.Runner.Worker.Handlers
                                             requireExitCodeZero: false,
                                             outputEncoding: null,
                                             killProcessOnCancel: false,
-                                            inheritConsoleHandler: !ExecutionContext.Variables.Retain_Default_Encoding,
+                                            inheritConsoleHandler: !ExecutionContext.Global.Variables.Retain_Default_Encoding,
                                             cancellationToken: ExecutionContext.CancellationToken);
 
                 // Error

src/Runner.Worker/JobExtension.cs

@@ -162,7 +162,7 @@ namespace GitHub.Runner.Worker
                         var environmentVariables = templateEvaluator.EvaluateStepEnvironment(token, jobContext.ExpressionValues, jobContext.ExpressionFunctions, VarUtil.EnvironmentVariableKeyComparer);
                         foreach (var pair in environmentVariables)
                         {
-                            context.EnvironmentVariables[pair.Key] = pair.Value ?? string.Empty;
+                            context.Global.EnvironmentVariables[pair.Key] = pair.Value ?? string.Empty;
                             context.SetEnvContext(pair.Key, pair.Value ?? string.Empty);
                         }
                     }
@@ -172,7 +172,7 @@ namespace GitHub.Runner.Worker
                     var container = templateEvaluator.EvaluateJobContainer(message.JobContainer, jobContext.ExpressionValues, jobContext.ExpressionFunctions);
                     if (container != null)
                     {
-                        jobContext.Container = new Container.ContainerInfo(HostContext, container);
+                        jobContext.Global.Container = new Container.ContainerInfo(HostContext, container);
                     }
 
                     // Evaluate the job service containers
@@ -184,7 +184,7 @@ namespace GitHub.Runner.Worker
                         {
                             var networkAlias = pair.Key;
                             var serviceContainer = pair.Value;
-                            jobContext.ServiceContainers.Add(new Container.ContainerInfo(HostContext, serviceContainer, false, networkAlias));
+                            jobContext.Global.ServiceContainers.Add(new Container.ContainerInfo(HostContext, serviceContainer, false, networkAlias));
                         }
                     }
 
@@ -195,14 +195,14 @@ namespace GitHub.Runner.Worker
                         var defaults = token.AssertMapping("defaults");
                         if (defaults.Any(x => string.Equals(x.Key.AssertString("defaults key").Value, "run", StringComparison.OrdinalIgnoreCase)))
                         {
-                            context.JobDefaults["run"] = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
+                            context.Global.JobDefaults["run"] = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
                             var defaultsRun = defaults.First(x => string.Equals(x.Key.AssertString("defaults key").Value, "run", StringComparison.OrdinalIgnoreCase));
                             var jobDefaults = templateEvaluator.EvaluateJobDefaultsRun(defaultsRun.Value, jobContext.ExpressionValues, jobContext.ExpressionFunctions);
                             foreach (var pair in jobDefaults)
                             {
                                 if (!string.IsNullOrEmpty(pair.Value))
                                 {
-                                    context.JobDefaults["run"][pair.Key] = pair.Value;
+                                    context.Global.JobDefaults["run"][pair.Key] = pair.Value;
                                 }
                             }
                         }
@@ -216,15 +216,15 @@ namespace GitHub.Runner.Worker
                     preJobSteps.AddRange(prepareResult.ContainerSetupSteps);
 
                     // Add start-container steps, record and stop-container steps
-                    if (jobContext.Container != null || jobContext.ServiceContainers.Count > 0)
+                    if (jobContext.Global.Container != null || jobContext.Global.ServiceContainers.Count > 0)
                     {
                         var containerProvider = HostContext.GetService<IContainerOperationProvider>();
                         var containers = new List<Container.ContainerInfo>();
-                        if (jobContext.Container != null)
+                        if (jobContext.Global.Container != null)
                         {
-                            containers.Add(jobContext.Container);
+                            containers.Add(jobContext.Global.Container);
                         }
-                        containers.AddRange(jobContext.ServiceContainers);
+                        containers.AddRange(jobContext.Global.ServiceContainers);
 
                         preJobSteps.Add(new JobExtensionRunner(runAsync: containerProvider.StartContainersAsync,
                                                                           condition: $"{PipelineTemplateConstants.Success}()",
@@ -296,7 +296,7 @@ namespace GitHub.Runner.Worker
                         {
                             ArgUtil.NotNull(actionStep, step.DisplayName);
                             intraActionStates.TryGetValue(actionStep.Action.Id, out var intraActionState);
-                            actionStep.ExecutionContext = jobContext.CreateChild(actionStep.Action.Id, actionStep.DisplayName, actionStep.Action.Name, actionStep.Action.ScopeName, actionStep.Action.ContextName, intraActionState);
+                            actionStep.ExecutionContext = jobContext.CreateChild(actionStep.Action.Id, actionStep.DisplayName, actionStep.Action.Name, null, actionStep.Action.ContextName, intraActionState);
                         }
                     }
 
@@ -305,7 +305,7 @@ namespace GitHub.Runner.Worker
                     steps.AddRange(jobSteps);
 
                     // Prepare for orphan process cleanup
-                    _processCleanup = jobContext.Variables.GetBoolean("process.clean") ?? true;
+                    _processCleanup = jobContext.Global.Variables.GetBoolean("process.clean") ?? true;
                     if (_processCleanup)
                     {
                         // Set the RUNNER_TRACKING_ID env variable.
@@ -376,13 +376,13 @@ namespace GitHub.Runner.Worker
                             var envContext = new CaseSensitiveDictionaryContextData();
 #endif
                             context.ExpressionValues["env"] = envContext;
-                            foreach (var pair in context.EnvironmentVariables)
+                            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.StepsContext.GetScope(context.ScopeName);
+                            context.ExpressionValues["steps"] = context.Global.StepsContext.GetScope(context.ScopeName);
 
                             var templateEvaluator = context.ToPipelineTemplateEvaluator();
                             var outputs = templateEvaluator.EvaluateJobOutput(message.JobOutputs, context.ExpressionValues, context.ExpressionFunctions);
@@ -413,7 +413,7 @@ namespace GitHub.Runner.Worker
                         }
                     }
 
-                    if (context.Variables.GetBoolean(Constants.Variables.Actions.RunnerDebug) ?? false)
+                    if (context.Global.Variables.GetBoolean(Constants.Variables.Actions.RunnerDebug) ?? false)
                     {
                         Trace.Info("Support log upload starting.");
                         context.Output("Uploading runner diagnostic logs");

src/Runner.Worker/JobRunner.cs

@@ -99,7 +99,7 @@ namespace GitHub.Runner.Worker
                     return await CompleteJobAsync(jobServer, jobContext, message, TaskResult.Failed);
                 }
 
-                if (jobContext.WriteDebug)
+                if (jobContext.Global.WriteDebug)
                 {
                     jobContext.SetRunnerContext("debug", "1");
                 }
@@ -209,7 +209,7 @@ namespace GitHub.Runner.Worker
             // Clean TEMP after finish process jobserverqueue, since there might be a pending fileupload still use the TEMP dir.
             _tempDirectoryManager?.CleanupTempDirectory();
 
-            if (!jobContext.Features.HasFlag(PlanFeatures.JobCompletedPlanEvent))
+            if (!jobContext.Global.Features.HasFlag(PlanFeatures.JobCompletedPlanEvent))
             {
                 Trace.Info($"Skip raise job completed event call from worker because Plan version is {message.Plan.Version}");
                 return result;

src/Runner.Worker/RunnerPluginManager.cs

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

src/Runner.Worker/StepsRunner.cs

@@ -67,11 +67,11 @@ namespace GitHub.Runner.Worker
 
                 var step = jobContext.JobSteps[0];
                 jobContext.JobSteps.RemoveAt(0);
-                var nextStep = jobContext.JobSteps.Count > 0 ? jobContext.JobSteps[0] : null;
 
                 Trace.Info($"Processing step: DisplayName='{step.DisplayName}'");
                 ArgUtil.NotNull(step.ExecutionContext, nameof(step.ExecutionContext));
-                ArgUtil.NotNull(step.ExecutionContext.Variables, nameof(step.ExecutionContext.Variables));
+                ArgUtil.NotNull(step.ExecutionContext.Global, nameof(step.ExecutionContext.Global));
+                ArgUtil.NotNull(step.ExecutionContext.Global.Variables, nameof(step.ExecutionContext.Global.Variables));
 
                 // Start
                 step.ExecutionContext.Start();
@@ -83,171 +83,165 @@ namespace GitHub.Runner.Worker
                 step.ExecutionContext.ExpressionFunctions.Add(new FunctionInfo<SuccessFunction>(PipelineTemplateConstants.Success, 0, 0));
                 step.ExecutionContext.ExpressionFunctions.Add(new FunctionInfo<HashFilesFunction>(PipelineTemplateConstants.HashFiles, 1, byte.MaxValue));
 
-                // Initialize scope
-                if (InitializeScope(step, scopeInputs))
-                {
-                    // Populate env context for each step
-                    Trace.Info("Initialize Env context for step");
+                step.ExecutionContext.ExpressionValues["steps"] = step.ExecutionContext.Global.StepsContext.GetScope(step.ExecutionContext.ScopeName);
+
+                // Populate env context for each step
+                Trace.Info("Initialize Env context for step");
 #if OS_WINDOWS
-                    var envContext = new DictionaryContextData();
+                var envContext = new DictionaryContextData();
 #else
-                    var envContext = new CaseSensitiveDictionaryContextData();
+                var envContext = new CaseSensitiveDictionaryContextData();
 #endif
-                    // Global env
-                    foreach (var pair in step.ExecutionContext.EnvironmentVariables)
+
+                // Global env
+                foreach (var pair in step.ExecutionContext.Global.EnvironmentVariables)
+                {
+                    envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
+                }
+
+                step.ExecutionContext.ExpressionValues["env"] = envContext;
+
+                bool evaluateStepEnvFailed = false;
+                if (step is IActionRunner actionStep)
+                {
+                    // Set GITHUB_ACTION
+                    // Warning: Do not turn on FF DistributedTask.UseContextNameForGITHUBACTION until after M271-ish. After M271-ish
+                    // the server will never send an empty context name. Generated context names start with "__"
+                    if (step.ExecutionContext.Global.Variables.GetBoolean("DistributedTask.UseContextNameForGITHUBACTION") ?? false)
                     {
-                        envContext[pair.Key] = new StringContextData(pair.Value ?? string.Empty);
+                        step.ExecutionContext.SetGitHubContext("action", actionStep.Action.Name);
+                    }
+                    else
+                    {
+                        step.ExecutionContext.SetGitHubContext("action", step.ExecutionContext.GetFullyQualifiedContextName());
                     }
 
-                    // Stomps over with outside step env
-                    if (step.ExecutionContext.ExpressionValues.TryGetValue("env", out var envContextData))
+                    try
                     {
-#if OS_WINDOWS
-                        var dict = envContextData as DictionaryContextData;
-#else
-                        var dict = envContextData as CaseSensitiveDictionaryContextData;
-#endif
-                        foreach (var pair in dict)
+                        // Evaluate and merge action's env block to env context
+                        var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator();
+                        var actionEnvironment = templateEvaluator.EvaluateStepEnvironment(actionStep.Action.Environment, step.ExecutionContext.ExpressionValues, step.ExecutionContext.ExpressionFunctions, VarUtil.EnvironmentVariableKeyComparer);
+                        foreach (var env in actionEnvironment)
                         {
-                            envContext[pair.Key] = pair.Value;
+                            envContext[env.Key] = new StringContextData(env.Value ?? string.Empty);
                         }
                     }
-
-                    step.ExecutionContext.ExpressionValues["env"] = envContext;
-
-                    bool evaluateStepEnvFailed = false;
-                    if (step is IActionRunner actionStep)
+                    catch (Exception ex)
                     {
-                        // Set GITHUB_ACTION
-                        step.ExecutionContext.SetGitHubContext("action", actionStep.Action.Name);
+                        // fail the step since there is an evaluate error.
+                        Trace.Info("Caught exception from expression for step.env");
+                        evaluateStepEnvFailed = true;
+                        step.ExecutionContext.Error(ex);
+                        CompleteStep(step, TaskResult.Failed);
+                    }
+                }
 
-                        try
+                if (!evaluateStepEnvFailed)
+                {
+                    try
+                    {
+                        // Register job cancellation call back only if job cancellation token not been fire before each step run
+                        if (!jobContext.CancellationToken.IsCancellationRequested)
                         {
-                            // Evaluate and merge action's env block to env context
-                            var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator();
-                            var actionEnvironment = templateEvaluator.EvaluateStepEnvironment(actionStep.Action.Environment, step.ExecutionContext.ExpressionValues, step.ExecutionContext.ExpressionFunctions, VarUtil.EnvironmentVariableKeyComparer);
-                            foreach (var env in actionEnvironment)
+                            // Test the condition again. The job was canceled after the condition was originally evaluated.
+                            jobCancelRegister = jobContext.CancellationToken.Register(() =>
                             {
-                                envContext[env.Key] = new StringContextData(env.Value ?? string.Empty);
+                                // mark job as cancelled
+                                jobContext.Result = TaskResult.Canceled;
+                                jobContext.JobContext.Status = jobContext.Result?.ToActionResult();
+
+                                step.ExecutionContext.Debug($"Re-evaluate condition on job cancellation for step: '{step.DisplayName}'.");
+                                var conditionReTestTraceWriter = new ConditionTraceWriter(Trace, null); // host tracing only
+                                var conditionReTestResult = false;
+                                if (HostContext.RunnerShutdownToken.IsCancellationRequested)
+                                {
+                                    step.ExecutionContext.Debug($"Skip Re-evaluate condition on runner shutdown.");
+                                }
+                                else
+                                {
+                                    try
+                                    {
+                                        var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator(conditionReTestTraceWriter);
+                                        var condition = new BasicExpressionToken(null, null, null, step.Condition);
+                                        conditionReTestResult = templateEvaluator.EvaluateStepIf(condition, step.ExecutionContext.ExpressionValues, step.ExecutionContext.ExpressionFunctions, step.ExecutionContext.ToExpressionState());
+                                    }
+                                    catch (Exception ex)
+                                    {
+                                        // Cancel the step since we get exception while re-evaluate step condition.
+                                        Trace.Info("Caught exception from expression when re-test condition on job cancellation.");
+                                        step.ExecutionContext.Error(ex);
+                                    }
+                                }
+
+                                if (!conditionReTestResult)
+                                {
+                                    // Cancel the step.
+                                    Trace.Info("Cancel current running step.");
+                                    step.ExecutionContext.CancelToken();
+                                }
+                            });
+                        }
+                        else
+                        {
+                            if (jobContext.Result != TaskResult.Canceled)
+                            {
+                                // mark job as cancelled
+                                jobContext.Result = TaskResult.Canceled;
+                                jobContext.JobContext.Status = jobContext.Result?.ToActionResult();
                             }
                         }
-                        catch (Exception ex)
+
+                        // Evaluate condition.
+                        step.ExecutionContext.Debug($"Evaluating condition for step: '{step.DisplayName}'");
+                        var conditionTraceWriter = new ConditionTraceWriter(Trace, step.ExecutionContext);
+                        var conditionResult = false;
+                        var conditionEvaluateError = default(Exception);
+                        if (HostContext.RunnerShutdownToken.IsCancellationRequested)
+                        {
+                            step.ExecutionContext.Debug($"Skip evaluate condition on runner shutdown.");
+                        }
+                        else
+                        {
+                            try
+                            {
+                                var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator(conditionTraceWriter);
+                                var condition = new BasicExpressionToken(null, null, null, step.Condition);
+                                conditionResult = templateEvaluator.EvaluateStepIf(condition, step.ExecutionContext.ExpressionValues, step.ExecutionContext.ExpressionFunctions, step.ExecutionContext.ToExpressionState());
+                            }
+                            catch (Exception ex)
+                            {
+                                Trace.Info("Caught exception from expression.");
+                                Trace.Error(ex);
+                                conditionEvaluateError = ex;
+                            }
+                        }
+
+                        // no evaluate error but condition is false
+                        if (!conditionResult && conditionEvaluateError == null)
+                        {
+                            // Condition == false
+                            Trace.Info("Skipping step due to condition evaluation.");
+                            CompleteStep(step, TaskResult.Skipped, resultCode: conditionTraceWriter.Trace);
+                        }
+                        else if (conditionEvaluateError != null)
                         {
                             // fail the step since there is an evaluate error.
-                            Trace.Info("Caught exception from expression for step.env");
-                            evaluateStepEnvFailed = true;
-                            step.ExecutionContext.Error(ex);
-                            CompleteStep(step, nextStep, TaskResult.Failed);
+                            step.ExecutionContext.Error(conditionEvaluateError);
+                            CompleteStep(step, TaskResult.Failed);
+                        }
+                        else
+                        {
+                            // Run the step.
+                            await RunStepAsync(step, jobContext.CancellationToken);
+                            CompleteStep(step);
                         }
                     }
-
-                    if (!evaluateStepEnvFailed)
+                    finally
                     {
-                        try
+                        if (jobCancelRegister != null)
                         {
-                            // Register job cancellation call back only if job cancellation token not been fire before each step run
-                            if (!jobContext.CancellationToken.IsCancellationRequested)
-                            {
-                                // Test the condition again. The job was canceled after the condition was originally evaluated.
-                                jobCancelRegister = jobContext.CancellationToken.Register(() =>
-                                {
-                                    // mark job as cancelled
-                                    jobContext.Result = TaskResult.Canceled;
-                                    jobContext.JobContext.Status = jobContext.Result?.ToActionResult();
-
-                                    step.ExecutionContext.Debug($"Re-evaluate condition on job cancellation for step: '{step.DisplayName}'.");
-                                    var conditionReTestTraceWriter = new ConditionTraceWriter(Trace, null); // host tracing only
-                                    var conditionReTestResult = false;
-                                    if (HostContext.RunnerShutdownToken.IsCancellationRequested)
-                                    {
-                                        step.ExecutionContext.Debug($"Skip Re-evaluate condition on runner shutdown.");
-                                    }
-                                    else
-                                    {
-                                        try
-                                        {
-                                            var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator(conditionReTestTraceWriter);
-                                            var condition = new BasicExpressionToken(null, null, null, step.Condition);
-                                            conditionReTestResult = templateEvaluator.EvaluateStepIf(condition, step.ExecutionContext.ExpressionValues, step.ExecutionContext.ExpressionFunctions, step.ExecutionContext.ToExpressionState());
-                                        }
-                                        catch (Exception ex)
-                                        {
-                                            // Cancel the step since we get exception while re-evaluate step condition.
-                                            Trace.Info("Caught exception from expression when re-test condition on job cancellation.");
-                                            step.ExecutionContext.Error(ex);
-                                        }
-                                    }
-
-                                    if (!conditionReTestResult)
-                                    {
-                                        // Cancel the step.
-                                        Trace.Info("Cancel current running step.");
-                                        step.ExecutionContext.CancelToken();
-                                    }
-                                });
-                            }
-                            else
-                            {
-                                if (jobContext.Result != TaskResult.Canceled)
-                                {
-                                    // mark job as cancelled
-                                    jobContext.Result = TaskResult.Canceled;
-                                    jobContext.JobContext.Status = jobContext.Result?.ToActionResult();
-                                }
-                            }
-
-                            // Evaluate condition.
-                            step.ExecutionContext.Debug($"Evaluating condition for step: '{step.DisplayName}'");
-                            var conditionTraceWriter = new ConditionTraceWriter(Trace, step.ExecutionContext);
-                            var conditionResult = false;
-                            var conditionEvaluateError = default(Exception);
-                            if (HostContext.RunnerShutdownToken.IsCancellationRequested)
-                            {
-                                step.ExecutionContext.Debug($"Skip evaluate condition on runner shutdown.");
-                            }
-                            else
-                            {
-                                try
-                                {
-                                    var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator(conditionTraceWriter);
-                                    var condition = new BasicExpressionToken(null, null, null, step.Condition);
-                                    conditionResult = templateEvaluator.EvaluateStepIf(condition, step.ExecutionContext.ExpressionValues, step.ExecutionContext.ExpressionFunctions, step.ExecutionContext.ToExpressionState());
-                                }
-                                catch (Exception ex)
-                                {
-                                    Trace.Info("Caught exception from expression.");
-                                    Trace.Error(ex);
-                                    conditionEvaluateError = ex;
-                                }
-                            }
-
-                            // no evaluate error but condition is false
-                            if (!conditionResult && conditionEvaluateError == null)
-                            {
-                                // Condition == false
-                                Trace.Info("Skipping step due to condition evaluation.");
-                                CompleteStep(step, nextStep, TaskResult.Skipped, resultCode: conditionTraceWriter.Trace);
-                            }
-                            else if (conditionEvaluateError != null)
-                            {
-                                // fail the step since there is an evaluate error.
-                                step.ExecutionContext.Error(conditionEvaluateError);
-                                CompleteStep(step, nextStep, TaskResult.Failed);
-                            }
-                            else
-                            {
-                                // Run the step.
-                                await RunStepAsync(step, jobContext.CancellationToken);
-                                CompleteStep(step, nextStep);
-                            }
-                        }
-                        finally
-                        {
-                            if (jobCancelRegister != null)
-                            {
-                                jobCancelRegister?.Dispose();
-                                jobCancelRegister = null;
-                            }
+                            jobCancelRegister?.Dispose();
+                            jobCancelRegister = null;
                         }
                     }
                 }
@@ -302,40 +296,7 @@ namespace GitHub.Runner.Worker
                 step.ExecutionContext.SetTimeout(timeout);
             }
 
-#if OS_WINDOWS
-            try
-            {
-                if (Console.InputEncoding.CodePage != 65001)
-                {
-                    using (var p = HostContext.CreateService<IProcessInvoker>())
-                    {
-                        // Use UTF8 code page
-                        int exitCode = await p.ExecuteAsync(workingDirectory: HostContext.GetDirectory(WellKnownDirectory.Work),
-                                                fileName: WhichUtil.Which("chcp", true, Trace),
-                                                arguments: "65001",
-                                                environment: null,
-                                                requireExitCodeZero: false,
-                                                outputEncoding: null,
-                                                killProcessOnCancel: false,
-                                                redirectStandardIn: null,
-                                                inheritConsoleHandler: true,
-                                                cancellationToken: step.ExecutionContext.CancellationToken);
-                        if (exitCode == 0)
-                        {
-                            Trace.Info("Successfully returned to code page 65001 (UTF8)");
-                        }
-                        else
-                        {
-                            Trace.Warning($"'chcp 65001' failed with exit code {exitCode}");
-                        }
-                    }
-                }
-            }
-            catch (Exception ex)
-            {
-                Trace.Warning($"'chcp 65001' failed with exception {ex.Message}");
-            }
-#endif
+            await EncodingUtil.SetEncoding(HostContext, Trace, step.ExecutionContext.CancellationToken);
 
             try
             {
@@ -401,125 +362,9 @@ namespace GitHub.Runner.Worker
             step.ExecutionContext.Debug($"Finishing: {step.DisplayName}");
         }
 
-        private bool InitializeScope(IStep step, Dictionary<string, PipelineContextData> scopeInputs)
+        private void CompleteStep(IStep step, TaskResult? result = null, string resultCode = null)
         {
             var executionContext = step.ExecutionContext;
-            var stepsContext = executionContext.StepsContext;
-            if (!string.IsNullOrEmpty(executionContext.ScopeName))
-            {
-                // Gather uninitialized current and ancestor scopes
-                var scope = executionContext.Scopes[executionContext.ScopeName];
-                var scopesToInitialize = default(Stack<ContextScope>);
-                while (scope != null && !scopeInputs.ContainsKey(scope.Name))
-                {
-                    if (scopesToInitialize == null)
-                    {
-                        scopesToInitialize = new Stack<ContextScope>();
-                    }
-                    scopesToInitialize.Push(scope);
-                    scope = string.IsNullOrEmpty(scope.ParentName) ? null : executionContext.Scopes[scope.ParentName];
-                }
-
-                // Initialize current and ancestor scopes
-                while (scopesToInitialize?.Count > 0)
-                {
-                    scope = scopesToInitialize.Pop();
-                    executionContext.Debug($"Initializing scope '{scope.Name}'");
-                    executionContext.ExpressionValues["steps"] = stepsContext.GetScope(scope.ParentName);
-                    // TODO: Fix this temporary workaround for Composite Actions
-                    if (!executionContext.ExpressionValues.ContainsKey("inputs") && !string.IsNullOrEmpty(Environment.GetEnvironmentVariable("TESTING_COMPOSITE_ACTIONS_ALPHA")))
-                    {
-                        executionContext.ExpressionValues["inputs"] = !String.IsNullOrEmpty(scope.ParentName) ? scopeInputs[scope.ParentName] : null;
-                    }
-                    var templateEvaluator = executionContext.ToPipelineTemplateEvaluator();
-                    var inputs = default(DictionaryContextData);
-                    try
-                    {
-                        inputs = templateEvaluator.EvaluateStepScopeInputs(scope.Inputs, executionContext.ExpressionValues, executionContext.ExpressionFunctions);
-                    }
-                    catch (Exception ex)
-                    {
-                        Trace.Info($"Caught exception from initialize scope '{scope.Name}'");
-                        Trace.Error(ex);
-                        executionContext.Error(ex);
-                        executionContext.Complete(TaskResult.Failed);
-                        return false;
-                    }
-
-                    scopeInputs[scope.Name] = inputs;
-                }
-            }
-
-            // Setup expression values
-            var scopeName = executionContext.ScopeName;
-            executionContext.ExpressionValues["steps"] = stepsContext.GetScope(scopeName);
-            // TODO: Fix this temporary workaround for Composite Actions
-            if (!executionContext.ExpressionValues.ContainsKey("inputs") && !string.IsNullOrEmpty(Environment.GetEnvironmentVariable("TESTING_COMPOSITE_ACTIONS_ALPHA")))
-            {
-                executionContext.ExpressionValues["inputs"] = string.IsNullOrEmpty(scopeName) ? null : scopeInputs[scopeName];
-            }
-
-            return true;
-        }
-
-        private void CompleteStep(IStep step, IStep nextStep, TaskResult? result = null, string resultCode = null)
-        {
-            var executionContext = step.ExecutionContext;
-            if (!string.IsNullOrEmpty(executionContext.ScopeName))
-            {
-                // Gather current and ancestor scopes to finalize
-                var scope = executionContext.Scopes[executionContext.ScopeName];
-                var scopesToFinalize = default(Queue<ContextScope>);
-                var nextStepScopeName = nextStep?.ExecutionContext.ScopeName;
-                while (scope != null &&
-                    !string.Equals(nextStepScopeName, scope.Name, StringComparison.OrdinalIgnoreCase) &&
-                    !(nextStepScopeName ?? string.Empty).StartsWith($"{scope.Name}.", StringComparison.OrdinalIgnoreCase))
-                {
-                    if (scopesToFinalize == null)
-                    {
-                        scopesToFinalize = new Queue<ContextScope>();
-                    }
-                    scopesToFinalize.Enqueue(scope);
-                    scope = string.IsNullOrEmpty(scope.ParentName) ? null : executionContext.Scopes[scope.ParentName];
-                }
-
-                // Finalize current and ancestor scopes
-                var stepsContext = step.ExecutionContext.StepsContext;
-                while (scopesToFinalize?.Count > 0)
-                {
-                    scope = scopesToFinalize.Dequeue();
-                    executionContext.Debug($"Finalizing scope '{scope.Name}'");
-                    executionContext.ExpressionValues["steps"] = stepsContext.GetScope(scope.Name);
-                    executionContext.ExpressionValues["inputs"] = null;
-                    var templateEvaluator = executionContext.ToPipelineTemplateEvaluator();
-                    var outputs = default(DictionaryContextData);
-                    try
-                    {
-                        outputs = templateEvaluator.EvaluateStepScopeOutputs(scope.Outputs, executionContext.ExpressionValues, executionContext.ExpressionFunctions);
-                    }
-                    catch (Exception ex)
-                    {
-                        Trace.Info($"Caught exception from finalize scope '{scope.Name}'");
-                        Trace.Error(ex);
-                        executionContext.Error(ex);
-                        executionContext.Complete(TaskResult.Failed);
-                        return;
-                    }
-
-                    if (outputs?.Count > 0)
-                    {
-                        var parentScopeName = scope.ParentName;
-                        var contextName = scope.ContextName;
-                        foreach (var pair in outputs)
-                        {
-                            var outputName = pair.Key;
-                            var outputValue = pair.Value.ToString();
-                            stepsContext.SetOutput(parentScopeName, contextName, outputName, outputValue, out var reference);
-                            executionContext.Debug($"{reference}='{outputValue}'");
-                        }
-                    }
-                }
-            }
 
             executionContext.Complete(result, resultCode: resultCode);
         }

src/Runner.Worker/action_yaml.json

@@ -7,7 +7,8 @@
                     "name": "string",
                     "description": "string",
                     "inputs": "inputs",
-                    "runs": "runs"
+                    "runs": "runs",
+                    "outputs": "outputs"
                 },
                 "loose-key-type": "non-empty-string",
                 "loose-value-type": "any"
@@ -28,6 +29,20 @@
                 "loose-value-type": "any"
             }
         },
+        "outputs": {
+            "mapping": {
+                "loose-key-type": "non-empty-string",
+                "loose-value-type": "outputs-attributes"
+            }
+        },
+        "outputs-attributes": {
+            "mapping": {
+                "properties": {
+                    "description": "string",
+                    "value": "output-value"
+                }
+            }
+        },
         "runs": {
             "one-of": [
                 "container-runs",
@@ -95,19 +110,13 @@
         "composite-steps": {
             "context": [
                 "github",
-                "needs",
                 "strategy",
                 "matrix",
-                "secrets",
                 "steps",
                 "inputs",
                 "job",
                 "runner",
                 "env",
-                "always(0,0)",
-                "failure(0,0)",
-                "cancelled(0,0)",
-                "success(0,0)",
                 "hashFiles(1,255)"
             ],
             "sequence": {
@@ -120,6 +129,19 @@
             ],
             "string": {}
         },
+        "output-value": {
+            "context": [
+                "github",
+                "strategy",
+                "matrix",
+                "steps",
+                "inputs",
+                "job",
+                "runner",
+                "env"
+            ],
+            "string": {}
+        },
         "input-default-context": {
             "context": [
                 "github",

src/Sdk/DTPipelines/Pipelines/ActionStep.cs

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

src/Sdk/DTPipelines/Pipelines/AgentJobRequestMessage.cs

@@ -39,7 +39,6 @@ namespace GitHub.DistributedTask.Pipelines
             DictionaryContextData contextData,
             WorkspaceOptions workspaceOptions,
             IEnumerable<JobStep> steps,
-            IEnumerable<ContextScope> scopes,
             IList<String> fileTable,
             TemplateToken jobOutputs,
             IList<TemplateToken> defaults)
@@ -60,11 +59,6 @@ namespace GitHub.DistributedTask.Pipelines
             m_maskHints = new List<MaskHint>(maskHints);
             m_steps = new List<JobStep>(steps);
 
-            if (scopes != null)
-            {
-                m_scopes = new List<ContextScope>(scopes);
-            }
-
             if (environmentVariables?.Count > 0)
             {
                 m_environmentVariables = new List<TemplateToken>(environmentVariables);
@@ -261,18 +255,6 @@ namespace GitHub.DistributedTask.Pipelines
             }
         }
 
-        public IList<ContextScope> Scopes
-        {
-            get
-            {
-                if (m_scopes == null)
-                {
-                    m_scopes = new List<ContextScope>();
-                }
-                return m_scopes;
-            }
-        }
-
         /// <summary>
         /// Gets the table of files used when parsing the pipeline (e.g. yaml files)
         /// </summary>
@@ -415,11 +397,6 @@ namespace GitHub.DistributedTask.Pipelines
                 m_maskHints = new List<MaskHint>(this.m_maskHints.Distinct());
             }
 
-            if (m_scopes?.Count == 0)
-            {
-                m_scopes = null;
-            }
-
             if (m_variables?.Count == 0)
             {
                 m_variables = null;
@@ -447,9 +424,6 @@ namespace GitHub.DistributedTask.Pipelines
         [DataMember(Name = "Steps", EmitDefaultValue = false)]
         private List<JobStep> m_steps;
 
-        [DataMember(Name = "Scopes", EmitDefaultValue = false)]
-        private List<ContextScope> m_scopes;
-
         [DataMember(Name = "Variables", EmitDefaultValue = false)]
         private IDictionary<String, VariableValue> m_variables;
 

src/Sdk/DTPipelines/Pipelines/ContextScope.cs

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

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

@@ -11,8 +11,7 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String BooleanStrategyContext = "boolean-strategy-context";
         public const String CancelTimeoutMinutes = "cancel-timeout-minutes";
         public const String Cancelled = "cancelled";
-        public const String Checkout = "checkout";
-        public const String Clean = "clean";
+        public const String Clean= "clean";
         public const String Container = "container";
         public const String ContinueOnError = "continue-on-error";
         public const String Defaults = "defaults";
@@ -23,7 +22,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String FailFast = "fail-fast";
         public const String Failure = "failure";
         public const String FetchDepth = "fetch-depth";
-        public const String GeneratedId = "generated-id";
         public const String GitHub = "github";
         public const String HashFiles = "hashFiles";
         public const String Id = "id";
@@ -36,7 +34,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String JobIfResult = "job-if-result";
         public const String JobOutputs = "job-outputs";
         public const String Jobs = "jobs";
-        public const String Labels = "labels";
         public const String Lfs = "lfs";
         public const String Matrix = "matrix";
         public const String MaxParallel = "max-parallel";
@@ -52,24 +49,18 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String Pool = "pool";
         public const String Ports = "ports";
         public const String Result = "result";
-        public const String RunDisplayPrefix = "Run ";
         public const String Run = "run";
+        public const String RunDisplayPrefix = "Run ";
         public const String Runner = "runner";
         public const String RunsOn = "runs-on";
-        public const String Scope = "scope";
-        public const String Scopes = "scopes";
         public const String Secrets = "secrets";
         public const String Services = "services";
         public const String Shell = "shell";
         public const String Skipped = "skipped";
         public const String StepEnv = "step-env";
         public const String StepIfResult = "step-if-result";
-        public const String Steps = "steps";
-        public const String StepsInTemplate = "steps-in-template";
-        public const String StepsScopeInputs = "steps-scope-inputs";
-        public const String StepsScopeOutputs = "steps-scope-outputs";
-        public const String StepsTemplateRoot = "steps-template-root";
         public const String StepWith = "step-with";
+        public const String Steps = "steps";
         public const String Strategy = "strategy";
         public const String StringStepsContext = "string-steps-context";
         public const String StringStrategyContext = "string-strategy-context";
@@ -77,7 +68,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         public const String Success = "success";
         public const String Template = "template";
         public const String TimeoutMinutes = "timeout-minutes";
-        public const String Token = "token";
         public const String Uses = "uses";
         public const String VmImage = "vmImage";
         public const String Volumes = "volumes";

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

@@ -1,6 +1,6 @@
 using System;
 using System.Collections.Generic;
-using System.Globalization;
+using System.ComponentModel;
 using System.Linq;
 using GitHub.DistributedTask.Expressions2;
 using GitHub.DistributedTask.Expressions2.Sdk;
@@ -14,8 +14,62 @@ using Newtonsoft.Json.Linq;
 
 namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
 {
-    internal static class PipelineTemplateConverter
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public static class PipelineTemplateConverter
     {
+        public static List<Step> ConvertToSteps(
+            TemplateContext context,
+            TemplateToken steps)
+        {
+            var stepsSequence = steps.AssertSequence($"job {PipelineTemplateConstants.Steps}");
+
+            var result = new List<Step>();
+            var nameBuilder = new ReferenceNameBuilder();
+            foreach (var stepsItem in stepsSequence)
+            {
+                var step = ConvertToStep(context, stepsItem, nameBuilder);
+                if (step != null) // step = null means we are hitting error during step conversion, there should be an error in context.errors
+                {
+                    if (step.Enabled)
+                    {
+                        result.Add(step);
+                    }
+                }
+            }
+
+            // Generate context name if empty
+            foreach (ActionStep step in result)
+            {
+                if (!String.IsNullOrEmpty(step.ContextName))
+                {
+                    continue;
+                }
+
+                var name = default(string);
+                switch (step.Reference.Type)
+                {
+                    case ActionSourceType.ContainerRegistry:
+                        var containerReference = step.Reference as ContainerRegistryReference;
+                        name = containerReference.Image;
+                        break;
+                    case ActionSourceType.Repository:
+                        var repositoryReference = step.Reference as RepositoryPathReference;
+                        name = !String.IsNullOrEmpty(repositoryReference.Name) ? repositoryReference.Name : PipelineConstants.SelfAlias;
+                        break;
+                }
+
+                if (String.IsNullOrEmpty(name))
+                {
+                    name = "run";
+                }
+
+                nameBuilder.AppendSegment($"__{name}");
+                step.ContextName = nameBuilder.Build();
+            }
+
+            return result;
+        }
+
         internal static Boolean ConvertToIfResult(
             TemplateContext context,
             TemplateToken ifResult)
@@ -29,6 +83,7 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             var evaluationResult = EvaluationResult.CreateIntermediateResult(null, ifResult);
             return evaluationResult.IsTruthy;
         }
+
         internal static Boolean? ConvertToStepContinueOnError(
             TemplateContext context,
             TemplateToken token,
@@ -264,32 +319,10 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             return result;
         }
 
-        //Note: originally was List<Step> but we need to change to List<ActionStep> to use the "Inputs" attribute
-        internal static List<ActionStep> ConvertToSteps(
-            TemplateContext context,
-            TemplateToken steps)
-        {
-            var stepsSequence = steps.AssertSequence($"job {PipelineTemplateConstants.Steps}");
-
-            var result = new List<ActionStep>();
-            foreach (var stepsItem in stepsSequence)
-            {
-                var step = ConvertToStep(context, stepsItem);
-                if (step != null) // step = null means we are hitting error during step conversion, there should be an error in context.errors
-                {
-                    if (step.Enabled)
-                    {
-                        result.Add(step);
-                    }
-                }
-            }
-
-            return result;
-        }
-
         private static ActionStep ConvertToStep(
             TemplateContext context,
-            TemplateToken stepsItem)
+            TemplateToken stepsItem,
+            ReferenceNameBuilder nameBuilder)
         {
             var step = stepsItem.AssertMapping($"{PipelineTemplateConstants.Steps} item");
             var continueOnError = default(ScalarToken);
@@ -299,7 +332,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             var ifToken = default(ScalarToken);
             var name = default(ScalarToken);
             var run = default(ScalarToken);
-            var scope = default(StringToken);
             var timeoutMinutes = default(ScalarToken);
             var uses = default(StringToken);
             var with = default(TemplateToken);
@@ -337,9 +369,12 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
 
                     case PipelineTemplateConstants.Id:
                         id = stepProperty.Value.AssertString($"{PipelineTemplateConstants.Steps} item {PipelineTemplateConstants.Id}");
-                        if (!NameValidation.IsValid(id.Value, true))
+                        if (!String.IsNullOrEmpty(id.Value))
                         {
-                            context.Error(id, $"Step id {id.Value} is invalid. Ids must start with a letter or '_' and contain only alphanumeric characters, '-', or '_'");
+                            if (!nameBuilder.TryAddKnownName(id.Value, out var error))
+                            {
+                                context.Error(id, error);
+                            }
                         }
                         break;
 
@@ -367,10 +402,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
                         shell = stepProperty.Value.AssertScalar($"{PipelineTemplateConstants.Steps} item {PipelineTemplateConstants.Shell}");
                         break;
 
-                    case PipelineTemplateConstants.Scope:
-                        scope = stepProperty.Value.AssertString($"{PipelineTemplateConstants.Steps} item {PipelineTemplateConstants.Scope}");
-                        break;
-
                     case PipelineTemplateConstants.Submodules:
                         submodules = stepProperty.Value.AssertScalar($"{PipelineTemplateConstants.Steps} item {PipelineTemplateConstants.Submodules}");
                         break;
@@ -400,14 +431,12 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             }
 
             // Fixup the if-condition
-            var isDefaultScope = String.IsNullOrEmpty(scope?.Value);
-            ifCondition = ConvertToIfCondition(context, ifToken, false, isDefaultScope);
+            ifCondition = ConvertToIfCondition(context, ifToken, false);
 
             if (run != null)
             {
                 var result = new ActionStep
                 {
-                    ScopeName = scope?.Value,
                     ContextName = id?.Value,
                     ContinueOnError = continueOnError,
                     DisplayNameToken = name,
@@ -439,7 +468,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
                 uses.AssertString($"{PipelineTemplateConstants.Steps} item {PipelineTemplateConstants.Uses}");
                 var result = new ActionStep
                 {
-                    ScopeName = scope?.Value,
                     ContextName = id?.Value,
                     ContinueOnError = continueOnError,
                     DisplayNameToken = name,
@@ -503,8 +531,7 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         private static String ConvertToIfCondition(
             TemplateContext context,
             TemplateToken token,
-            Boolean isJob,
-            Boolean isDefaultScope)
+            Boolean isJob)
         {
             String condition;
             if (token is null)
@@ -537,7 +564,7 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             }
             else
             {
-                namedValues = isDefaultScope ? s_stepNamedValues : s_stepInTemplateNamedValues;
+                namedValues = s_stepNamedValues;
                 functions = s_stepConditionFunctions;
             }
 
@@ -589,18 +616,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Env),
             new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Needs),
         };
-        private static readonly INamedValueInfo[] s_stepInTemplateNamedValues = new INamedValueInfo[]
-        {
-            new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Strategy),
-            new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Matrix),
-            new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Steps),
-            new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Inputs),
-            new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.GitHub),
-            new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Job),
-            new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Runner),
-            new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Env),
-            new NamedValueInfo<NoOperationNamedValue>(PipelineTemplateConstants.Needs),
-        };
         private static readonly IFunctionInfo[] s_stepConditionFunctions = new IFunctionInfo[]
         {
             new FunctionInfo<NoOperation>(PipelineTemplateConstants.Always, 0, 0),

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

@@ -51,60 +51,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
 
         public Int32 MaxResultSize { get; set; } = 10 * 1024 * 1024; // 10 mb
 
-        public DictionaryContextData EvaluateStepScopeInputs(
-            TemplateToken token,
-            DictionaryContextData contextData,
-            IList<IFunctionInfo> expressionFunctions)
-        {
-            var result = default(DictionaryContextData);
-
-            if (token != null && token.Type != TokenType.Null)
-            {
-                var context = CreateContext(contextData, expressionFunctions);
-                try
-                {
-                    token = TemplateEvaluator.Evaluate(context, PipelineTemplateConstants.StepsScopeInputs, token, 0, null, omitHeader: true);
-                    context.Errors.Check();
-                    result = token.ToContextData().AssertDictionary("steps scope inputs");
-                }
-                catch (Exception ex) when (!(ex is TemplateValidationException))
-                {
-                    context.Errors.Add(ex);
-                }
-
-                context.Errors.Check();
-            }
-
-            return result ?? new DictionaryContextData();
-        }
-
-        public DictionaryContextData EvaluateStepScopeOutputs(
-            TemplateToken token,
-            DictionaryContextData contextData,
-            IList<IFunctionInfo> expressionFunctions)
-        {
-            var result = default(DictionaryContextData);
-
-            if (token != null && token.Type != TokenType.Null)
-            {
-                var context = CreateContext(contextData, expressionFunctions);
-                try
-                {
-                    token = TemplateEvaluator.Evaluate(context, PipelineTemplateConstants.StepsScopeOutputs, token, 0, null, omitHeader: true);
-                    context.Errors.Check();
-                    result = token.ToContextData().AssertDictionary("steps scope outputs");
-                }
-                catch (Exception ex) when (!(ex is TemplateValidationException))
-                {
-                    context.Errors.Add(ex);
-                }
-
-                context.Errors.Check();
-            }
-
-            return result ?? new DictionaryContextData();
-        }
-
         public Boolean EvaluateStepContinueOnError(
             TemplateToken token,
             DictionaryContextData contextData,
@@ -159,31 +105,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             return result;
         }
 
-        public List<ActionStep> LoadCompositeSteps(
-            TemplateToken token)
-        {
-            var result = default(List<ActionStep>);
-            if (token != null && token.Type != TokenType.Null)
-            {
-                var context = CreateContext(null, null, setMissingContext: false);
-                // TODO: we might want to to have a bool to prevent it from filling in with missing context w/ dummy variables
-                try
-                {
-                    token = TemplateEvaluator.Evaluate(context, PipelineTemplateConstants.StepsInTemplate, token, 0, null, omitHeader: true);
-                    context.Errors.Check();
-                    result = PipelineTemplateConverter.ConvertToSteps(context, token);
-                }
-                catch (Exception ex) when (!(ex is TemplateValidationException))
-                {
-                    context.Errors.Add(ex);
-                }
-
-                context.Errors.Check();
-            }
-            return result;
-        }
-
-
         public Dictionary<String, String> EvaluateStepEnvironment(
             TemplateToken token,
             DictionaryContextData contextData,
@@ -425,8 +346,7 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         private TemplateContext CreateContext(
             DictionaryContextData contextData,
             IList<IFunctionInfo> expressionFunctions,
-            IEnumerable<KeyValuePair<String, Object>> expressionState = null,
-            bool setMissingContext = true)
+            IEnumerable<KeyValuePair<String, Object>> expressionState = null)
         {
             var result = new TemplateContext
             {
@@ -475,21 +395,18 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
             //   - Evaluating early when all referenced contexts are available, even though all allowed
             //     contexts may not yet be available. For example, evaluating step display name can often
             //     be performed early.
-            if (setMissingContext)
+            foreach (var name in s_expressionValueNames)
             {
-                foreach (var name in s_expressionValueNames)
+                if (!result.ExpressionValues.ContainsKey(name))
                 {
-                    if (!result.ExpressionValues.ContainsKey(name))
-                    {
-                        result.ExpressionValues[name] = null;
-                    }
+                    result.ExpressionValues[name] = null;
                 }
-                foreach (var name in s_expressionFunctionNames)
+            }
+            foreach (var name in s_expressionFunctionNames)
+            {
+                if (!functionNames.Contains(name))
                 {
-                    if (!functionNames.Contains(name))
-                    {
-                        result.ExpressionFunctions.Add(new FunctionInfo<NoOperation>(name, 0, Int32.MaxValue));
-                    }
+                    result.ExpressionFunctions.Add(new FunctionInfo<NoOperation>(name, 0, Int32.MaxValue));
                 }
             }
 

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

@@ -0,0 +1,121 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Text;
+using GitHub.DistributedTask.Pipelines.Validation;
+
+namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
+{
+    internal sealed class ReferenceNameBuilder
+    {
+        internal void AppendSegment(String value)
+        {
+            if (String.IsNullOrEmpty(value))
+            {
+                return;
+            }
+
+            if (m_name.Length == 0)
+            {
+                var first = value[0];
+                if ((first >= 'a' && first <= 'z') ||
+                    (first >= 'A' && first <= 'Z') ||
+                    first == '_')
+                {
+                    // Legal first char
+                }
+                else if ((first >= '0' && first <= '9') || first == '-')
+                {
+                    // Illegal first char, but legal char.
+                    // Prepend "_".
+                    m_name.Append("_");
+                }
+                else
+                {
+                    // Illegal char
+                }
+            }
+            else
+            {
+                // Separator
+                m_name.Append(c_separator);
+            }
+
+            foreach (var c in value)
+            {
+                if ((c >= 'a' && c <= 'z') ||
+                    (c >= 'A' && c <= 'Z') ||
+                    (c >= '0' && c <= '9') ||
+                    c == '_' ||
+                    c == '-')
+                {
+                    // Legal
+                    m_name.Append(c);
+                }
+                else
+                {
+                    // Illegal
+                    m_name.Append("_");
+                }
+            }
+        }
+
+        internal String Build()
+        {
+            var original = m_name.Length > 0 ? m_name.ToString() : "job";
+
+            var attempt = 1;
+            var suffix = default(String);
+            while (true)
+            {
+                if (attempt == 1)
+                {
+                    suffix = String.Empty;
+                }
+                else if (attempt < 1000)
+                {
+                    suffix = String.Format(CultureInfo.InvariantCulture, "_{0}", attempt);
+                }
+                else
+                {
+                    throw new InvalidOperationException("Unable to create a unique name");
+                }
+
+                var candidate = original.Substring(0, Math.Min(original.Length, PipelineConstants.MaxNodeNameLength - suffix.Length)) + suffix;
+
+                if (m_distinctNames.Add(candidate))
+                {
+                    m_name.Clear();
+                    return candidate;
+                }
+
+                attempt++;
+            }
+        }
+
+        internal Boolean TryAddKnownName(
+            String value,
+            out String error)
+        {
+            if (!NameValidation.IsValid(value, allowHyphens: true) && value.Length < PipelineConstants.MaxNodeNameLength)
+            {
+                error = $"The identifier '{value}' is invalid. IDs may only contain alphanumeric characters, '_', and '-'. IDs must start with a letter or '_' and and must be less than {PipelineConstants.MaxNodeNameLength} characters.";
+                return false;
+            }
+            else if (!m_distinctNames.Add(value))
+            {
+                error = $"The identifier '{value}' may not be used more than once within the same scope.";
+                return false;
+            }
+            else
+            {
+                error = null;
+                return true;
+            }
+        }
+
+        private const String c_separator = "_";
+        private readonly HashSet<String> m_distinctNames = new HashSet<String>(StringComparer.OrdinalIgnoreCase);
+        private readonly StringBuilder m_name = new StringBuilder();
+    }
+}

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

@@ -16,116 +16,6 @@
       }
     },
 
-    "steps-template-root": {
-      "description": "Steps template file",
-      "mapping": {
-        "properties": {
-          "inputs": "steps-template-inputs",
-          "outputs": "steps-template-outputs",
-          "steps": "steps-in-template"
-        }
-      }
-    },
-
-    "steps-scope-inputs": {
-      "description": "Used when evaluating steps scope inputs",
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "steps-scope-input-value"
-      }
-    },
-
-    "steps-scope-input-value": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env"
-      ],
-      "one-of": [
-        "string",
-        "sequence",
-        "mapping"
-      ]
-    },
-
-    "steps-scope-outputs": {
-      "description": "Used when evaluating steps scope outputs",
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "steps-scope-output-value"
-      }
-    },
-
-    "steps-scope-output-value": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env"
-      ],
-      "string": {}
-    },
-
-    "steps-template-inputs": {
-      "description": "Allowed inputs in a steps template",
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "steps-template-input-value"
-      }
-    },
-
-    "steps-template-input-value": {
-      "description": "Default input values for a steps template",
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix"
-      ],
-      "one-of": [
-        "string",
-        "sequence",
-        "mapping"
-      ]
-    },
-
-    "steps-template-outputs": {
-      "description": "Output mapping for a steps template",
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "steps-template-output-value"
-      }
-    },
-
-    "steps-template-output-value": {
-      "description": "Output values for a steps template",
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "job",
-        "runner",
-        "env"
-      ],
-      "string": {}
-    },
-
     "workflow-defaults": {
       "mapping": {
         "properties": {
@@ -240,54 +130,27 @@
     "matrix": {
       "mapping": {
         "properties": {
-          "include": "matrix-include",
-          "exclude": "matrix-exclude"
+          "include": "matrix-filter",
+          "exclude": "matrix-filter"
         },
         "loose-key-type": "non-empty-string",
         "loose-value-type": "sequence"
       }
     },
 
-    "matrix-include": {
+    "matrix-filter": {
       "sequence": {
-        "item-type": "matrix-include-item"
+        "item-type": "matrix-filter-item"
       }
     },
 
-    "matrix-include-item": {
+    "matrix-filter-item": {
       "mapping": {
         "loose-key-type": "non-empty-string",
         "loose-value-type": "any"
       }
     },
 
-    "matrix-exclude": {
-      "sequence": {
-        "item-type": "matrix-exclude-item"
-      }
-    },
-
-    "matrix-exclude-item": {
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "matrix-exclude-filter-item"
-      }
-    },
-
-    "matrix-exclude-filter-item": {
-      "one-of": [
-        "string",
-        "matrix-exclude-mapping-filter"
-      ]
-    },
-
-    "matrix-exclude-mapping-filter": {
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "matrix-exclude-filter-item"
-      }
-    },
-
     "runs-on": {
       "context": [
         "github",
@@ -364,25 +227,10 @@
       }
     },
 
-    "steps-in-template": {
-      "sequence": {
-        "item-type": "steps-item-in-template"
-      }
-    },
-
     "steps-item": {
       "one-of": [
         "run-step",
-        "regular-step",
-        "steps-template-reference"
-      ]
-    },
-
-    "steps-item-in-template": {
-      "one-of": [
-        "run-step-in-template",
-        "regular-step-in-template",
-        "steps-template-reference-in-template"
+        "regular-step"
       ]
     },
 
@@ -405,25 +253,6 @@
       }
     },
 
-    "run-step-in-template": {
-      "mapping": {
-        "properties": {
-          "name": "string-steps-context-in-template",
-          "id": "non-empty-string",
-          "if": "step-if-in-template",
-          "timeout-minutes": "number-steps-context-in-template",
-          "run": {
-            "type": "string-steps-context-in-template",
-            "required": true
-          },
-          "continue-on-error": "boolean-steps-context-in-template",
-          "env": "step-env-in-template",
-          "working-directory": "string-steps-context-in-template",
-          "shell": "non-empty-string"
-        }
-      }
-    },
-
     "regular-step": {
       "mapping": {
         "properties": {
@@ -442,24 +271,6 @@
       }
     },
 
-    "regular-step-in-template": {
-      "mapping": {
-        "properties": {
-          "name": "string-steps-context-in-template",
-          "id": "non-empty-string",
-          "if": "step-if-in-template",
-          "continue-on-error": "boolean-steps-context-in-template",
-          "timeout-minutes": "number-steps-context-in-template",
-          "uses": {
-            "type": "non-empty-string",
-            "required": true
-          },
-          "with": "step-with-in-template",
-          "env": "step-env-in-template"
-        }
-      }
-    },
-
     "step-if": {
       "context": [
         "github",
@@ -479,26 +290,6 @@
       "string": {}
     },
 
-    "step-if-in-template": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env",
-        "always(0,0)",
-        "failure(0,0)",
-        "cancelled(0,0)",
-        "success(0,0)",
-        "hashFiles(1,255)"
-      ],
-      "string": {}
-    },
-
     "step-if-result": {
       "context": [
         "github",
@@ -524,89 +315,6 @@
       ]
     },
 
-    "step-if-result-in-template": {
-      "context": [
-        "github",
-        "strategy",
-        "matrix",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env",
-        "always(0,0)",
-        "failure(0,0)",
-        "cancelled(0,0)",
-        "success(0,0)",
-        "hashFiles(1,255)"
-      ],
-      "one-of": [
-        "null",
-        "boolean",
-        "number",
-        "string",
-        "sequence",
-        "mapping"
-      ]
-    },
-
-    "steps-template-reference": {
-      "mapping": {
-        "properties": {
-          "template": "non-empty-string",
-          "id": "non-empty-string",
-          "inputs": "steps-template-reference-inputs"
-        }
-      }
-    },
-
-    "steps-template-reference-in-template": {
-      "mapping": {
-        "properties": {
-          "template": "non-empty-string",
-          "id": "non-empty-string",
-          "inputs": "steps-template-reference-inputs-in-template"
-        }
-      }
-    },
-
-    "steps-template-reference-inputs": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "job",
-        "runner",
-        "env"
-      ],
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "string"
-      }
-    },
-
-    "steps-template-reference-inputs-in-template": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env"
-      ],
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "string"
-      }
-    },
-
     "step-env": {
       "context": [
         "github",
@@ -626,26 +334,6 @@
       }
     },
 
-    "step-env-in-template": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env",
-        "hashFiles(1,255)"
-      ],
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "string"
-      }
-    },
-
     "step-with": {
       "context": [
         "github",
@@ -665,26 +353,6 @@
       }
     },
 
-    "step-with-in-template": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env",
-        "hashFiles(1,255)"
-      ],
-      "mapping": {
-        "loose-key-type": "non-empty-string",
-        "loose-value-type": "string"
-      }
-    },
-
     "container": {
       "context": [
         "github",
@@ -801,23 +469,6 @@
       "boolean": {}
     },
 
-    "boolean-steps-context-in-template": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env",
-        "hashFiles(1,255)"
-      ],
-      "boolean": {}
-    },
-
     "number-steps-context": {
       "context": [
         "github",
@@ -834,23 +485,6 @@
       "number": {}
     },
 
-    "number-steps-context-in-template": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env",
-        "hashFiles(1,255)"
-      ],
-      "number": {}
-    },
-
     "string-runner-context": {
       "context": [
         "github",
@@ -880,23 +514,6 @@
         "hashFiles(1,255)"
       ],
       "string": {}
-    },
-
-    "string-steps-context-in-template": {
-      "context": [
-        "github",
-        "needs",
-        "strategy",
-        "matrix",
-        "secrets",
-        "steps",
-        "inputs",
-        "job",
-        "runner",
-        "env",
-        "hashFiles(1,255)"
-      ],
-      "string": {}
     }
   }
 }

src/Sdk/DTWebApi/WebApi/TaskAgentReference.cs

@@ -24,6 +24,7 @@ namespace GitHub.DistributedTask.WebApi
             this.OSDescription = referenceToBeCloned.OSDescription;
             this.ProvisioningState = referenceToBeCloned.ProvisioningState;
             this.AccessPoint = referenceToBeCloned.AccessPoint;
+            this.Ephemeral = referenceToBeCloned.Ephemeral;
 
             if (referenceToBeCloned.m_links != null)
             {
@@ -81,6 +82,16 @@ namespace GitHub.DistributedTask.WebApi
             set;
         }
 
+        /// <summary>
+        /// Signifies that this Agent can only run one job and will be removed by the server after that one job finish.
+        /// </summary>
+        [DataMember]
+        public bool? Ephemeral
+        {
+            get;
+            set;
+        }
+
         /// <summary>
         /// Whether or not the agent is online.
         /// </summary>

src/Test/L0/DotnetsdkDownloadScriptL0.cs

@@ -1,58 +1,58 @@
-using Xunit;
-using System.IO;
-using System.Net.Http;
-using System.Threading.Tasks;
+// using Xunit;
+// using System.IO;
+// using System.Net.Http;
+// using System.Threading.Tasks;
 
-namespace GitHub.Runner.Common.Tests
-{
-    public sealed class DotnetsdkDownloadScriptL0
-    {
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Runner")]
-        public async Task EnsureDotnetsdkBashDownloadScriptUpToDate()
-        {
-            string shDownloadUrl = "https://dot.net/v1/dotnet-install.sh";
+// namespace GitHub.Runner.Common.Tests
+// {
+//     public sealed class DotnetsdkDownloadScriptL0
+//     {
+//         [Fact]
+//         [Trait("Level", "L0")]
+//         [Trait("Category", "Runner")]
+//         public async Task EnsureDotnetsdkBashDownloadScriptUpToDate()
+//         {
+//             string shDownloadUrl = "https://dot.net/v1/dotnet-install.sh";
 
-            using (HttpClient downloadClient = new HttpClient())
-            {
-                var response = await downloadClient.GetAsync("https://www.bing.com");
-                if (!response.IsSuccessStatusCode)
-                {
-                    return;
-                }
+//             using (HttpClient downloadClient = new HttpClient())
+//             {
+//                 var response = await downloadClient.GetAsync("https://www.bing.com");
+//                 if (!response.IsSuccessStatusCode)
+//                 {
+//                     return;
+//                 }
 
-                string shScript = await downloadClient.GetStringAsync(shDownloadUrl);
+//                 string shScript = await downloadClient.GetStringAsync(shDownloadUrl);
 
-                string existingShScript = File.ReadAllText(Path.Combine(TestUtil.GetSrcPath(), "Misc/dotnet-install.sh"));
+//                 string existingShScript = File.ReadAllText(Path.Combine(TestUtil.GetSrcPath(), "Misc/dotnet-install.sh"));
 
-                bool shScriptMatched = string.Equals(shScript.TrimEnd('\n', '\r', '\0').Replace("\r\n", "\n").Replace("\r", "\n"), existingShScript.TrimEnd('\n', '\r', '\0').Replace("\r\n", "\n").Replace("\r", "\n"));
-                Assert.True(shScriptMatched, "Fix the test by updating Src/Misc/dotnet-install.sh with content from https://dot.net/v1/dotnet-install.sh");
-            }
-        }
+//                 bool shScriptMatched = string.Equals(shScript.TrimEnd('\n', '\r', '\0').Replace("\r\n", "\n").Replace("\r", "\n"), existingShScript.TrimEnd('\n', '\r', '\0').Replace("\r\n", "\n").Replace("\r", "\n"));
+//                 Assert.True(shScriptMatched, "Fix the test by updating Src/Misc/dotnet-install.sh with content from https://dot.net/v1/dotnet-install.sh");
+//             }
+//         }
 
-        [Fact]
-        [Trait("Level", "L0")]
-        [Trait("Category", "Runner")]
-        public async Task EnsureDotnetsdkPowershellDownloadScriptUpToDate()
-        {
-            string ps1DownloadUrl = "https://dot.net/v1/dotnet-install.ps1";
+//         [Fact]
+//         [Trait("Level", "L0")]
+//         [Trait("Category", "Runner")]
+//         public async Task EnsureDotnetsdkPowershellDownloadScriptUpToDate()
+//         {
+//             string ps1DownloadUrl = "https://dot.net/v1/dotnet-install.ps1";
 
-            using (HttpClient downloadClient = new HttpClient())
-            {
-                var response = await downloadClient.GetAsync("https://www.bing.com");
-                if (!response.IsSuccessStatusCode)
-                {
-                    return;
-                }
+//             using (HttpClient downloadClient = new HttpClient())
+//             {
+//                 var response = await downloadClient.GetAsync("https://www.bing.com");
+//                 if (!response.IsSuccessStatusCode)
+//                 {
+//                     return;
+//                 }
 
-                string ps1Script = await downloadClient.GetStringAsync(ps1DownloadUrl);
+//                 string ps1Script = await downloadClient.GetStringAsync(ps1DownloadUrl);
 
-                string existingPs1Script = File.ReadAllText(Path.Combine(TestUtil.GetSrcPath(), "Misc/dotnet-install.ps1"));
+//                 string existingPs1Script = File.ReadAllText(Path.Combine(TestUtil.GetSrcPath(), "Misc/dotnet-install.ps1"));
 
-                bool ps1ScriptMatched = string.Equals(ps1Script.TrimEnd('\n', '\r', '\0').Replace("\r\n", "\n").Replace("\r", "\n"), existingPs1Script.TrimEnd('\n', '\r', '\0').Replace("\r\n", "\n").Replace("\r", "\n"));
-                Assert.True(ps1ScriptMatched, "Fix the test by updating Src/Misc/dotnet-install.ps1 with content from https://dot.net/v1/dotnet-install.ps1");
-            }
-        }
-    }
-}
+//                 bool ps1ScriptMatched = string.Equals(ps1Script.TrimEnd('\n', '\r', '\0').Replace("\r\n", "\n").Replace("\r", "\n"), existingPs1Script.TrimEnd('\n', '\r', '\0').Replace("\r\n", "\n").Replace("\r", "\n"));
+//                 Assert.True(ps1ScriptMatched, "Fix the test by updating Src/Misc/dotnet-install.ps1 with content from https://dot.net/v1/dotnet-install.ps1");
+//             }
+//         }
+//     }
+// }

src/Test/L0/Listener/JobDispatcherL0.cs

@@ -33,7 +33,7 @@ namespace GitHub.Runner.Common.Tests.Listener
             TaskOrchestrationPlanReference plan = new TaskOrchestrationPlanReference();
             TimelineReference timeline = null;
             Guid jobId = Guid.NewGuid();
-            var result = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "someJob", "someJob", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+            var result = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "someJob", "someJob", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null);
             result.ContextData["github"] = new Pipelines.ContextData.DictionaryContextData();
             return result;
         }

src/Test/L0/Listener/RunnerL0.cs

@@ -43,7 +43,7 @@ namespace GitHub.Runner.Common.Tests.Listener
             TaskOrchestrationPlanReference plan = new TaskOrchestrationPlanReference();
             TimelineReference timeline = null;
             Guid jobId = Guid.NewGuid();
-            return new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "test", "test", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+            return new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "test", "test", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null);
         }
 
         private JobCancelMessage CreateJobCancelMessage()
@@ -243,7 +243,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 runner.Initialize(hc);
                 var settings = new RunnerSettings
                 {
-                    PoolId = 43242
+                    PoolId = 43242,
+                    Ephemeral = true
                 };
 
                 var message = new TaskAgentMessage()
@@ -294,7 +295,7 @@ namespace GitHub.Runner.Common.Tests.Listener
 
                 _configStore.Setup(x => x.IsServiceConfigured()).Returns(false);
                 //Act
-                var command = new CommandSettings(hc, new string[] { "run", "--once" });
+                var command = new CommandSettings(hc, new string[] { "run" });
                 Task<int> runnerTask = runner.ExecuteCommand(command);
 
                 //Assert
@@ -332,7 +333,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 runner.Initialize(hc);
                 var settings = new RunnerSettings
                 {
-                    PoolId = 43242
+                    PoolId = 43242,
+                    Ephemeral = true
                 };
 
                 var message1 = new TaskAgentMessage()
@@ -390,7 +392,7 @@ namespace GitHub.Runner.Common.Tests.Listener
 
                 _configStore.Setup(x => x.IsServiceConfigured()).Returns(false);
                 //Act
-                var command = new CommandSettings(hc, new string[] { "run", "--once" });
+                var command = new CommandSettings(hc, new string[] { "run" });
                 Task<int> runnerTask = runner.ExecuteCommand(command);
 
                 //Assert
@@ -431,7 +433,8 @@ namespace GitHub.Runner.Common.Tests.Listener
                 var settings = new RunnerSettings
                 {
                     PoolId = 43242,
-                    AgentId = 5678
+                    AgentId = 5678,
+                    Ephemeral = true
                 };
 
                 var message1 = new TaskAgentMessage()
@@ -475,7 +478,7 @@ namespace GitHub.Runner.Common.Tests.Listener
 
                 _configStore.Setup(x => x.IsServiceConfigured()).Returns(false);
                 //Act
-                var command = new CommandSettings(hc, new string[] { "run", "--once" });
+                var command = new CommandSettings(hc, new string[] { "run" });
                 Task<int> runnerTask = runner.ExecuteCommand(command);
 
                 //Assert

src/Test/L0/Worker/ActionCommandManagerL0.cs

@@ -96,7 +96,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                        hc.GetTrace().Info($"{issue.Type} {issue.Message} {message ?? string.Empty}");
                    });
 
-                _ec.Setup(x => x.EnvironmentVariables).Returns(new Dictionary<string, string>());
+                _ec.Object.Global.EnvironmentVariables = new Dictionary<string, string>();
 
                 Assert.True(_commandManager.TryProcessCommand(_ec.Object, "##[stop-commands]stopToken", null));
                 Assert.False(_commandManager.TryProcessCommand(_ec.Object, "##[set-env name=foo]bar", null));
@@ -119,8 +119,6 @@ namespace GitHub.Runner.Common.Tests.Worker
                                 return 1;
                             });
 
-                _ec.SetupAllProperties();
-
                 Assert.False(_ec.Object.EchoOnActionCommand);
 
                 Assert.True(_commandManager.TryProcessCommand(_ec.Object, "::echo::on", null));
@@ -150,7 +148,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new TimelineReference();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -204,8 +202,6 @@ namespace GitHub.Runner.Common.Tests.Worker
                                 return 1;
                             });
 
-                _ec.SetupAllProperties();
-
                 // Echo commands below are considered "processed", but are invalid
                 // 1. Invalid echo value
                 Assert.True(_commandManager.TryProcessCommand(_ec.Object, "::echo::invalid", null));
@@ -287,6 +283,8 @@ namespace GitHub.Runner.Common.Tests.Worker
 
             // Execution context
             _ec = new Mock<IExecutionContext>();
+            _ec.SetupAllProperties();
+            _ec.Setup(x => x.Global).Returns(new GlobalContext());
 
             // Command manager
             _commandManager = new ActionCommandManager();

src/Test/L0/Worker/ActionManagerL0.cs

@@ -133,7 +133,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                         Reference = new Pipelines.RepositoryPathReference()
                         {
                             Name = ActionName,
-                            Ref = "master",
+                            Ref = "main",
                             RepositoryType = "GitHub"
                         }
                     }
@@ -141,7 +141,7 @@ namespace GitHub.Runner.Common.Tests.Worker
 
                 // Return a valid action from GHES via mock
                 const string ApiUrl = "https://ghes.example.com/api/v3";
-                string expectedArchiveLink = GetLinkToActionArchive(ApiUrl, ActionName, "master");
+                string expectedArchiveLink = GetLinkToActionArchive(ApiUrl, ActionName, "main");
                 string archiveFile = await CreateRepoArchive();
                 using var stream = File.OpenRead(archiveFile);
                 var mockClientHandler = new Mock<HttpClientHandler>();
@@ -159,10 +159,10 @@ namespace GitHub.Runner.Common.Tests.Worker
                 await _actionManager.PrepareActionsAsync(_ec.Object, actions);
 
                 //Assert
-                var watermarkFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "master.completed");
+                var watermarkFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "main.completed");
                 Assert.True(File.Exists(watermarkFile));
 
-                var actionYamlFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "master", "action.yml");
+                var actionYamlFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "main", "action.yml");
                 Assert.True(File.Exists(actionYamlFile));
                 _hc.GetTrace().Info(File.ReadAllText(actionYamlFile));
             }
@@ -191,7 +191,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                         Reference = new Pipelines.RepositoryPathReference()
                         {
                             Name = ActionName,
-                            Ref = "master",
+                            Ref = "main",
                             RepositoryType = "GitHub"
                         }
                     }
@@ -199,8 +199,8 @@ namespace GitHub.Runner.Common.Tests.Worker
 
                 // Return a valid action from GHES via mock
                 const string ApiUrl = "https://ghes.example.com/api/v3";
-                string builtInArchiveLink = GetLinkToActionArchive(ApiUrl, ActionName, "master");
-                string dotcomArchiveLink = GetLinkToActionArchive("https://api.github.com", ActionName, "master");
+                string builtInArchiveLink = GetLinkToActionArchive(ApiUrl, ActionName, "main");
+                string dotcomArchiveLink = GetLinkToActionArchive("https://api.github.com", ActionName, "main");
                 string archiveFile = await CreateRepoArchive();
                 using var stream = File.OpenRead(archiveFile);
                 var mockClientHandler = new Mock<HttpClientHandler>();
@@ -220,10 +220,10 @@ namespace GitHub.Runner.Common.Tests.Worker
                 await _actionManager.PrepareActionsAsync(_ec.Object, actions);
 
                 //Assert
-                var watermarkFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "master.completed");
+                var watermarkFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "main.completed");
                 Assert.True(File.Exists(watermarkFile));
 
-                var actionYamlFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "master", "action.yml");
+                var actionYamlFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "main", "action.yml");
                 Assert.True(File.Exists(actionYamlFile));
                 _hc.GetTrace().Info(File.ReadAllText(actionYamlFile));
             }
@@ -252,7 +252,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                         Reference = new Pipelines.RepositoryPathReference()
                         {
                             Name = ActionName,
-                            Ref = "master",
+                            Ref = "main",
                             RepositoryType = "GitHub"
                         }
                     }
@@ -260,7 +260,7 @@ namespace GitHub.Runner.Common.Tests.Worker
 
                 // Return a valid action from GHES via mock
                 const string ApiUrl = "https://ghes.example.com/api/v3";
-                string archiveLink = GetLinkToActionArchive(ApiUrl, ActionName, "master");
+                string archiveLink = GetLinkToActionArchive(ApiUrl, ActionName, "main");
                 string archiveFile = await CreateRepoArchive();
                 using var stream = File.OpenRead(archiveFile);
                 var mockClientHandler = new Mock<HttpClientHandler>();
@@ -280,10 +280,10 @@ namespace GitHub.Runner.Common.Tests.Worker
                 //Assert
                 await Assert.ThrowsAsync<ActionNotFoundException>(action);
 
-                var watermarkFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "master.completed");
+                var watermarkFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "main.completed");
                 Assert.False(File.Exists(watermarkFile));
 
-                var actionYamlFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "master", "action.yml");
+                var actionYamlFile = Path.Combine(_hc.GetDirectory(WellKnownDirectory.Actions), ActionName, "main", "action.yml");
                 Assert.False(File.Exists(actionYamlFile));
             }
             finally
@@ -846,7 +846,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 {
                     var traceFile = Path.GetTempFileName();
                     File.Copy(_hc.TraceFileName, traceFile, true);
-                    Assert.Contains("Entry javascript file is not provided.", File.ReadAllText(traceFile));
+                    Assert.Contains("You are using a JavaScript Action but there is not an entry JavaScript file provided in", File.ReadAllText(traceFile));
                 }
             }
             finally
@@ -1278,7 +1278,7 @@ runs:
 ";
                 Pipelines.ActionStep instance;
                 string directory;
-                directory = Path.Combine(_workFolder, Constants.Path.ActionsDirectory, "GitHub/actions".Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar), "master");
+                directory = Path.Combine(_workFolder, Constants.Path.ActionsDirectory, "GitHub/actions".Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar), "main");
                 string file = Path.Combine(directory, Constants.Path.ActionManifestYamlFile);
                 Directory.CreateDirectory(Path.GetDirectoryName(file));
                 File.WriteAllText(file, Content);
@@ -1288,7 +1288,7 @@ runs:
                     Reference = new Pipelines.RepositoryPathReference()
                     {
                         Name = "GitHub/actions",
-                        Ref = "master",
+                        Ref = "main",
                         RepositoryType = Pipelines.RepositoryTypes.GitHub
                     }
                 };
@@ -2466,7 +2466,7 @@ runs:
                 {
                     var traceFile = Path.GetTempFileName();
                     File.Copy(_hc.TraceFileName, traceFile, true);
-                    Assert.Contains("Entry javascript file is not provided.", File.ReadAllText(traceFile));
+                    Assert.Contains("You are using a JavaScript Action but there is not an entry JavaScript file provided in", File.ReadAllText(traceFile));
                 }
             }
             finally
@@ -2898,7 +2898,7 @@ runs:
 ";
                 Pipelines.ActionStep instance;
                 string directory;
-                directory = Path.Combine(_workFolder, Constants.Path.ActionsDirectory, "GitHub/actions".Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar), "master");
+                directory = Path.Combine(_workFolder, Constants.Path.ActionsDirectory, "GitHub/actions".Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar), "main");
                 string file = Path.Combine(directory, Constants.Path.ActionManifestYamlFile);
                 Directory.CreateDirectory(Path.GetDirectoryName(file));
                 File.WriteAllText(file, Content);
@@ -2908,7 +2908,7 @@ runs:
                     Reference = new Pipelines.RepositoryPathReference()
                     {
                         Name = "GitHub/actions",
-                        Ref = "master",
+                        Ref = "main",
                         RepositoryType = Pipelines.RepositoryTypes.GitHub
                     }
                 };
@@ -3453,7 +3453,7 @@ runs:
 
         private void CreateAction(string yamlContent, out Pipelines.ActionStep instance, out string directory)
         {
-            directory = Path.Combine(_workFolder, Constants.Path.ActionsDirectory, "GitHub/actions".Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar), "master");
+            directory = Path.Combine(_workFolder, Constants.Path.ActionsDirectory, "GitHub/actions".Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar), "main");
             string file = Path.Combine(directory, Constants.Path.ActionManifestYmlFile);
             Directory.CreateDirectory(Path.GetDirectoryName(file));
             File.WriteAllText(file, yamlContent);
@@ -3463,7 +3463,7 @@ runs:
                 Reference = new Pipelines.RepositoryPathReference()
                 {
                     Name = "GitHub/actions",
-                    Ref = "master",
+                    Ref = "main",
                     RepositoryType = Pipelines.RepositoryTypes.GitHub
                 }
             };
@@ -3481,7 +3481,7 @@ runs:
                 Reference = new Pipelines.RepositoryPathReference()
                 {
                     Name = "GitHub/actions",
-                    Ref = "master",
+                    Ref = "main",
                     RepositoryType = Pipelines.PipelineConstants.SelfAlias
                 }
             };
@@ -3575,17 +3575,18 @@ runs:
             _workFolder = _hc.GetDirectory(WellKnownDirectory.Work);
 
             _ec = new Mock<IExecutionContext>();
+            _ec.Setup(x => x.Global).Returns(new GlobalContext());
             _ec.Setup(x => x.CancellationToken).Returns(_ecTokenSource.Token);
             var variables = new Dictionary<string, VariableValue>();
             if (newActionMetadata)
             {
                 variables["DistributedTask.NewActionMetadata"] = "true";
             }
-            _ec.Setup(x => x.Variables).Returns(new Variables(_hc, variables));
+            _ec.Object.Global.Variables = new Variables(_hc, variables);
             _ec.Setup(x => x.ExpressionValues).Returns(new DictionaryContextData());
             _ec.Setup(x => x.ExpressionFunctions).Returns(new List<IFunctionInfo>());
-            _ec.Setup(x => x.FileTable).Returns(new List<String>());
-            _ec.Setup(x => x.Plan).Returns(new TaskOrchestrationPlanReference());
+            _ec.Object.Global.FileTable = new List<String>();
+            _ec.Object.Global.Plan = new TaskOrchestrationPlanReference();
             _ec.Setup(x => x.Write(It.IsAny<string>(), It.IsAny<string>())).Callback((string tag, string message) => { _hc.GetTrace().Info($"[{tag}]{message}"); });
             _ec.Setup(x => x.AddIssue(It.IsAny<Issue>(), It.IsAny<string>())).Callback((Issue issue, string message) => { _hc.GetTrace().Info($"[{issue.Type}]{issue.Message ?? message}"); });
             _ec.Setup(x => x.GetGitHubContext("workspace")).Returns(Path.Combine(_workFolder, "actions", "actions"));

src/Test/L0/Worker/ActionManifestManagerL0.cs

@@ -717,7 +717,7 @@ namespace GitHub.Runner.Common.Tests.Worker
 
                 _ec.Object.ExpressionValues["github"] = new DictionaryContextData
                 {
-                    { "ref", new StringContextData("refs/heads/master") },
+                    { "ref", new StringContextData("refs/heads/main") },
                 };
                 _ec.Object.ExpressionValues["strategy"] = new DictionaryContextData();
                 _ec.Object.ExpressionValues["matrix"] = new DictionaryContextData();
@@ -737,7 +737,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 result = actionManifest.EvaluateDefaultInput(_ec.Object, "testInput", new BasicExpressionToken(null, null, null, "github.ref"));
 
                 //Assert
-                Assert.Equal("refs/heads/master", result);
+                Assert.Equal("refs/heads/main", result);
             }
             finally
             {
@@ -754,12 +754,16 @@ namespace GitHub.Runner.Common.Tests.Worker
             _hc = new TestHostContext(this, name);
 
             _ec = new Mock<IExecutionContext>();
-            _ec.Setup(x => x.WriteDebug).Returns(true);
+            _ec.Setup(x => x.Global)
+                .Returns(new GlobalContext
+                {
+                    FileTable = new List<String>(),
+                    Variables = new Variables(_hc, new Dictionary<string, VariableValue>()),
+                    WriteDebug = true,
+                });
             _ec.Setup(x => x.CancellationToken).Returns(_ecTokenSource.Token);
-            _ec.Setup(x => x.Variables).Returns(new Variables(_hc, new Dictionary<string, VariableValue>()));
             _ec.Setup(x => x.ExpressionValues).Returns(new DictionaryContextData());
             _ec.Setup(x => x.ExpressionFunctions).Returns(new List<IFunctionInfo>());
-            _ec.Setup(x => x.FileTable).Returns(new List<String>());
             _ec.Setup(x => x.Write(It.IsAny<string>(), It.IsAny<string>())).Callback((string tag, string message) => { _hc.GetTrace().Info($"{tag}{message}"); });
             _ec.Setup(x => x.AddIssue(It.IsAny<Issue>(), It.IsAny<string>())).Callback((Issue issue, string message) => { _hc.GetTrace().Info($"[{issue.Type}]{issue.Message ?? message}"); });
         }

src/Test/L0/Worker/ActionRunnerL0.cs

@@ -375,15 +375,16 @@ namespace GitHub.Runner.Common.Tests.Worker
 #endif
 
             _ec = new Mock<IExecutionContext>();
+            _ec.Setup(x => x.Global).Returns(new GlobalContext());
             _ec.Setup(x => x.ExpressionValues).Returns(_context);
             _ec.Setup(x => x.ExpressionFunctions).Returns(new List<IFunctionInfo>());
             _ec.Setup(x => x.IntraActionState).Returns(new Dictionary<string, string>());
-            _ec.Setup(x => x.EnvironmentVariables).Returns(new Dictionary<string, string>());
-            _ec.Setup(x => x.FileTable).Returns(new List<String>());
+            _ec.Object.Global.EnvironmentVariables = new Dictionary<string, string>();
+            _ec.Object.Global.FileTable = new List<String>();
             _ec.Setup(x => x.SetGitHubContext(It.IsAny<string>(), It.IsAny<string>()));
             _ec.Setup(x => x.GetGitHubContext(It.IsAny<string>())).Returns("{\"foo\":\"bar\"}");
             _ec.Setup(x => x.CancellationToken).Returns(_ecTokenSource.Token);
-            _ec.Setup(x => x.Variables).Returns(new Variables(_hc, new Dictionary<string, VariableValue>()));
+            _ec.Object.Global.Variables = new Variables(_hc, new Dictionary<string, VariableValue>());
             _ec.Setup(x => x.Write(It.IsAny<string>(), It.IsAny<string>())).Callback((string tag, string message) => { _hc.GetTrace().Info($"[{tag}]{message}"); });
             _ec.Setup(x => x.AddIssue(It.IsAny<Issue>(), It.IsAny<string>())).Callback((Issue issue, string message) => { _hc.GetTrace().Info($"[{issue.Type}]{issue.Message ?? message}"); });
 

src/Test/L0/Worker/ExecutionContextL0.cs

@@ -26,7 +26,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new TimelineReference();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -102,7 +102,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new TimelineReference();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -153,7 +153,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new TimelineReference();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -251,7 +251,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new TimelineReference();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -335,7 +335,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 TimelineReference timeline = new TimelineReference();
                 Guid jobId = Guid.NewGuid();
                 string jobName = "some job name";
-                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+                var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, jobName, jobName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null);
                 jobRequest.Resources.Repositories.Add(new Pipelines.RepositoryResource()
                 {
                     Alias = Pipelines.PipelineConstants.SelfAlias,
@@ -357,20 +357,20 @@ namespace GitHub.Runner.Common.Tests.Worker
                 // Act.
                 jobContext.InitializeJob(jobRequest, CancellationToken.None);
 
-                jobContext.StepsContext.SetConclusion(null, "step1", ActionResult.Success);
-                var conclusion1 = (jobContext.StepsContext.GetScope(null)["step1"] as DictionaryContextData)["conclusion"].ToString();
+                jobContext.Global.StepsContext.SetConclusion(null, "step1", ActionResult.Success);
+                var conclusion1 = (jobContext.Global.StepsContext.GetScope(null)["step1"] as DictionaryContextData)["conclusion"].ToString();
                 Assert.Equal(conclusion1, conclusion1.ToLowerInvariant());
 
-                jobContext.StepsContext.SetOutcome(null, "step2", ActionResult.Cancelled);
-                var outcome1 = (jobContext.StepsContext.GetScope(null)["step2"] as DictionaryContextData)["outcome"].ToString();
+                jobContext.Global.StepsContext.SetOutcome(null, "step2", ActionResult.Cancelled);
+                var outcome1 = (jobContext.Global.StepsContext.GetScope(null)["step2"] as DictionaryContextData)["outcome"].ToString();
                 Assert.Equal(outcome1, outcome1.ToLowerInvariant());
 
-                jobContext.StepsContext.SetConclusion(null, "step3", ActionResult.Failure);
-                var conclusion2 = (jobContext.StepsContext.GetScope(null)["step3"] as DictionaryContextData)["conclusion"].ToString();
+                jobContext.Global.StepsContext.SetConclusion(null, "step3", ActionResult.Failure);
+                var conclusion2 = (jobContext.Global.StepsContext.GetScope(null)["step3"] as DictionaryContextData)["conclusion"].ToString();
                 Assert.Equal(conclusion2, conclusion2.ToLowerInvariant());
 
-                jobContext.StepsContext.SetOutcome(null, "step4", ActionResult.Skipped);
-                var outcome2 = (jobContext.StepsContext.GetScope(null)["step4"] as DictionaryContextData)["outcome"].ToString();
+                jobContext.Global.StepsContext.SetOutcome(null, "step4", ActionResult.Skipped);
+                var outcome2 = (jobContext.Global.StepsContext.GetScope(null)["step4"] as DictionaryContextData)["outcome"].ToString();
                 Assert.Equal(outcome2, outcome2.ToLowerInvariant());
 
                 jobContext.JobContext.Status = ActionResult.Success;

src/Test/L0/Worker/JobExtensionL0.cs

@@ -98,7 +98,7 @@ namespace GitHub.Runner.Common.Tests.Worker
             };
 
             Guid jobId = Guid.NewGuid();
-            _message = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "test", "test", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), steps, null, null, null, null);
+            _message = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, "test", "test", null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), steps, null, null, null);
             GitHubContext github = new GitHubContext();
             github["repository"] = new Pipelines.ContextData.StringContextData("actions/runner");
             _message.ContextData.Add("github", github);

src/Test/L0/Worker/JobRunnerL0.cs

@@ -60,7 +60,7 @@ namespace GitHub.Runner.Common.Tests.Worker
             TaskOrchestrationPlanReference plan = new TaskOrchestrationPlanReference();
             TimelineReference timeline = new Timeline(Guid.NewGuid());
             Guid jobId = Guid.NewGuid();
-            _message = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, testName, testName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null, null);
+            _message = new Pipelines.AgentJobRequestMessage(plan, timeline, jobId, testName, testName, null, null, null, new Dictionary<string, VariableValue>(), new List<MaskHint>(), new Pipelines.JobResources(), new Pipelines.ContextData.DictionaryContextData(), new Pipelines.WorkspaceOptions(), new List<Pipelines.ActionStep>(), null, null, null);
             _message.Variables[Constants.Variables.System.Culture] = "en-US";
             _message.Resources.Endpoints.Add(new ServiceEndpoint()
             {

src/Test/L0/Worker/OutputManagerL0.cs

@@ -955,12 +955,13 @@ namespace GitHub.Runner.Common.Tests.Worker
             _variables = new Variables(hostContext, new Dictionary<string, DTWebApi.VariableValue>());
 
             _executionContext = new Mock<IExecutionContext>();
-            _executionContext.Setup(x => x.WriteDebug)
-                .Returns(true);
-            _executionContext.Setup(x => x.Variables)
-                .Returns(_variables);
-            _executionContext.Setup(x => x.Container)
-                .Returns(jobContainer);
+            _executionContext.Setup(x => x.Global)
+                .Returns(new GlobalContext
+                {
+                    Container = jobContainer,
+                    Variables = _variables,
+                    WriteDebug = true,
+                });
             _executionContext.Setup(x => x.GetMatchers())
                 .Returns(matchers?.Matchers ?? new List<IssueMatcherConfig>());
             _executionContext.Setup(x => x.Add(It.IsAny<OnMatcherChanged>()))

src/Test/L0/Worker/PipelineDirectoryManagerL0.cs

@@ -203,6 +203,7 @@ namespace GitHub.Runner.Common.Tests.Worker
 
             // Setup the execution context.
             _ec = new Mock<IExecutionContext>();
+            _ec.Setup(x => x.Global).Returns(new GlobalContext());
 
             GitHubContext githubContext = new GitHubContext();
             _ec.Setup(x => x.GetGitHubContext("repository")).Returns("actions/runner");

src/Test/L0/Worker/StepsRunnerL0.cs

@@ -38,7 +38,9 @@ namespace GitHub.Runner.Common.Tests.Worker
             };
             _ec = new Mock<IExecutionContext>();
             _ec.SetupAllProperties();
-            _ec.Setup(x => x.Variables).Returns(_variables);
+            _ec.Setup(x => x.Global).Returns(new GlobalContext { WriteDebug = true });
+            _ec.Object.Global.Variables = _variables;
+            _ec.Object.Global.EnvironmentVariables = _env;
 
             _contexts = new DictionaryContextData();
             _jobContext = new JobContext();
@@ -50,7 +52,7 @@ namespace GitHub.Runner.Common.Tests.Worker
             _ec.Setup(x => x.JobContext).Returns(_jobContext);
 
             _stepContext = new StepsContext();
-            _ec.Setup(x => x.StepsContext).Returns(_stepContext);
+            _ec.Object.Global.StepsContext = _stepContext;
 
             _ec.Setup(x => x.PostJobSteps).Returns(new Stack<IStep>());
 
@@ -599,13 +601,10 @@ namespace GitHub.Runner.Common.Tests.Worker
             // Setup the step execution context.
             var stepContext = new Mock<IExecutionContext>();
             stepContext.SetupAllProperties();
-            stepContext.Setup(x => x.WriteDebug).Returns(true);
-            stepContext.Setup(x => x.Variables).Returns(_variables);
-            stepContext.Setup(x => x.EnvironmentVariables).Returns(_env);
+            stepContext.Setup(x => x.Global).Returns(() => _ec.Object.Global);
             stepContext.Setup(x => x.ExpressionValues).Returns(new DictionaryContextData());
             stepContext.Setup(x => x.ExpressionFunctions).Returns(new List<IFunctionInfo>());
             stepContext.Setup(x => x.JobContext).Returns(_jobContext);
-            stepContext.Setup(x => x.StepsContext).Returns(_stepContext);
             stepContext.Setup(x => x.ContextName).Returns(step.Object.Action.ContextName);
             stepContext.Setup(x => x.Complete(It.IsAny<TaskResult?>(), It.IsAny<string>(), It.IsAny<string>()))
                 .Callback((TaskResult? r, string currentOperation, string resultCode) =>

src/Test/L0/Worker/WorkerL0.cs

@@ -67,7 +67,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                     new Pipelines.ContextData.DictionaryContextData()
                 },
             };
-            var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, JobId, jobName, jobName, new StringToken(null, null, null, "ubuntu"), sidecarContainers, null, variables, new List<MaskHint>(), resources, context, null, actions, null, null, null, null);
+            var jobRequest = new Pipelines.AgentJobRequestMessage(plan, timeline, JobId, jobName, jobName, new StringToken(null, null, null, "ubuntu"), sidecarContainers, null, variables, new List<MaskHint>(), resources, context, null, actions, null, null, null);
             return jobRequest;
         }
 

src/runnerversion

@@ -1 +1 @@
-2.267.0
+2.299.0

test_script.sh

@@ -0,0 +1,6 @@
+apt-get update
+apt-get install -y apt-transport-https gnupg2
+curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
+echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | tee -a /etc/apt/sources.list.d/kubernetes.list
+apt-get update
+apt-get install -y kubectl