Release 2.273.3 runner

Don't include this for the 2.273.2 release just yet

This reverts commit 4e85b8f3b7.

README.md

@@ -6,7 +6,7 @@
 
 [![Actions Status](https://github.com/actions/runner/workflows/Runner%20CI/badge.svg)](https://github.com/actions/runner/actions)
 
-The runner is the application that runs a job from a GitHub Actions workflow.  The runner can run on the [hosted machine pools](https://github.com/actions/virtual-environments) or run on [self-hosted environments](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/about-self-hosted-runners).
+The runner is the application that runs a job from a GitHub Actions workflow. It is used by GitHub Actions in the [hosted virtual environments](https://github.com/actions/virtual-environments), or you can [self-host the runner](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/about-self-hosted-runners) in your own environment.
 
 ## Get Started
 

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

@@ -16,11 +16,32 @@ We don't want the workflow author to need to know how the internal workings of t
 
 A composite action is treated as **one** individual job step (this is known as encapsulation).
 
-
 ## Decision
 
 **In this ADR, we only support running multiple run steps in an Action.** In doing so, we build in support for mapping and flowing the inputs, outputs, and env variables (ex: All nested steps should have access to its parents' input variables and nested steps can overwrite the input variables).
 
+### Composite Run Steps Features
+This feature supports at the top action level:
+- name
+- description
+- inputs
+- runs
+- outputs
+
+This feature supports at the run step level:
+- name
+- id
+- run
+- env
+- shell
+- working-directory
+
+This feature **does not support** at the run step level:
+- timeout-minutes
+- secrets
+- conditionals (needs, if, etc.)
+- continue-on-error
+
 ### Steps
 
 Example `workflow.yml`
@@ -49,7 +70,9 @@ runs:
   using: "composite"
   steps:
     - run: pip install -r requirements.txt
+      shell: bash
     - run: npm install
+      shell: bash
 ```
 
 Example Output
@@ -63,6 +86,69 @@ echo hello world 4
 
 We add a token called "composite" which allows our Runner code to process composite actions. By invoking "using: composite", our Runner code then processes the "steps" attribute, converts this template code to a list of steps, and finally runs each run step sequentially. If any step fails and there are no `if` conditions defined, the whole composite action job fails. 
 
+### Defaults
+
+We will not support "defaults" in a composite action. 
+
+### Shell and Working-directory
+
+For each run step in a composite action, the action author can set the `shell` and `working-directory` attributes for that step. The shell attribute is **required** for each run step because the action author does not know what the workflow author is using for the operating system so we need to explicitly prevent unknown behavior by making sure that each run step has an explicit shell **set by the action author.** On the other hand, `working-directory` is optional. Moreover, the composite action author can map in values from the `inputs` for it's `shell` and `working-directory` attributes at the step level for an action. 
+
+For example,
+
+`action.yml`
+
+
+```yaml
+inputs:
+  shell_1:
+    description: 'Your name'
+    default: 'pwsh'
+steps:
+  - run: echo 1
+    shell: ${{ inputs.shell_1 }}
+```
+
+Note, the workflow file and action file are treated as separate entities. **So, the workflow `defaults` will never change the `shell` and `working-directory` value in the run steps in a composite action.** Note, `defaults` in a workflow only apply to run steps not "uses" steps (steps that use an action).
+
+### Running Local Scripts
+
+Example 'workflow.yml':
+```yaml
+jobs:
+  build:
+    runs-on: self-hosted
+    steps:
+    - uses: user/composite@v1
+```
+
+Example `user/composite/action.yml`:
+
+```yaml
+runs:
+  using: "composite"
+  steps: 
+    - run: chmod +x ${{ github.action_path }}/test/script2.sh
+      shell: bash
+    - run: chmod +x $GITHUB_ACTION_PATH/script.sh
+      shell: bash
+    - run: ${{ github.action_path }}/test/script2.sh
+      shell: bash
+    - run: $GITHUB_ACTION_PATH/script.sh
+      shell: bash
+```
+Where `user/composite` has the file structure:
+```
+.
++-- action.yml
++-- script.sh
++-- test
+|   +-- script2.sh
+```
+
+
+Users will be able to run scripts located in their action folder by first prepending the relative path and script name with `$GITHUB_ACTION_PATH` or `github.action_path` which contains the path in which the composite action is downloaded to and where those "files" live. Note, you'll have to use `chmod` before running each script if you do not git check in your script files into your github repo with the executable bit turned on.
+
 ### Inputs
 
 Example `workflow.yml`:
@@ -86,6 +172,7 @@ runs:
   using: "composite"
   steps: 
     - run: echo hello ${{ inputs.your_name }}
+      shell: bash
 ```
 
 Example Output:
@@ -106,6 +193,7 @@ steps:
   - id: foo
     uses: user/composite@v1
   - run: echo random-number ${{ steps.foo.outputs.random-number }} 
+    shell: bash
 ```
 
 Example `user/composite/action.yml`:
@@ -119,7 +207,8 @@ runs:
   using: "composite"
   steps: 
     - id: random-number-generator
-      run: echo "::set-output name=random-number::$(echo $RANDOM)"
+      run: echo "::set-output name=random-id::$(echo $RANDOM)"
+      shell: bash
 ```
 
 Example Output:
@@ -143,13 +232,17 @@ In the Composite Action, you'll only be able to use `::set-env::` to set environ
 
 ### Secrets
 
-**Note** : This feature will be focused on in a future ADR.
+**We will not support "Secrets" in a composite action for now. This functionality will be focused on in a future ADR.**
 
 We'll pass the secrets from the composite action's parents (ex: the workflow file) to the composite action. Secrets can be created in the composite action with the secrets context. In the actions yaml, we'll automatically mask the secret. 
 
 
 ### If Condition
 
+** If and needs conditions will not be supported in the composite run steps feature. It will be supported later on in a new feature. **
+
+Old reasoning:
+
 Example `workflow.yml`:
 
 ```yaml
@@ -166,12 +259,18 @@ runs:
   using: "composite"
   steps:
     - run: echo "just succeeding"
+      shell: bash
     - run: echo "I will run, as my current scope is succeeding"
+      shell: bash
       if: success()
     - run: exit 1
+      shell: bash
     - run: echo "I will not run, as my current scope is now failing"
+      shell: bash
 ```
 
+**We will not support "if Condition" in a composite action for now. This functionality will be focused on in a future ADR.**
+
 See the paragraph below for a rudimentary approach (thank you to @cybojenix for the idea, example, and explanation for this approach):
 
 The `if` statement in the parent (in the example above, this is the `workflow.yml`) shows whether or not we should run the composite action. So, our composite action will run since the `if` condition for running the composite action is `always()`.
@@ -203,13 +302,18 @@ runs:
     - id: foo1
       run: echo test 1
       timeout-minutes: 10
+      shell: bash
     - id: foo2
       run: echo test 2
+      shell: bash
     - id: foo3
       run: echo test 3
       timeout-minutes: 10
+      shell: bash
 ```
 
+**We will not support "timeout-minutes" in a composite action for now. This functionality will be focused on in a future ADR.**
+
 A composite action in its entirety is a job. You can set both timeout-minutes for the whole composite action or its steps as long as the the sum of the `timeout-minutes` for each composite action step that has the attribute `timeout-minutes` is less than or equals to `timeout-minutes` for the composite action. There is no default timeout-minutes for each composite action step. 
 
 If the time taken for any of the steps in combination or individually exceed the whole composite action `timeout-minutes` attribute, the whole job will fail (1). If an individual step exceeds its own `timeout-minutes` attribute but the total time that has been used including this step is below the overall composite action `timeout-minutes`, the individual step will fail but the rest of the steps will run based on their own `timeout-minutes` attribute (they will still abide by condition (1) though).
@@ -243,36 +347,17 @@ runs:
   steps: 
     - run: exit 1
       continue-on-error: true
+      shell: bash
     - run: echo "Hello World 2" <----- This step will run
+      shell: bash
 ```
 
+**We will not support "continue-on-error" in a composite action for now. This functionality will be focused on in a future ADR.**
+
 If any of the steps fail in the composite action and the `continue-on-error` is set to `false` for the whole composite action step in the workflow file, then the steps below it will run. On the flip side, if `continue-on-error` is set to `true` for the whole composite action step in the workflow file, the next job step will run.
 
 For the composite action steps, it follows the same logic as above. In this example, `"Hello World 2"` will be outputted because the previous step has `continue-on-error` set to `true` although that previous step errored. 
 
-### Defaults
-We will not support "defaults" in a composite action. 
-
-### Shell and Working-directory
-For each run step in a composite action, the action author can set the `shell` and `working-directory` attributes for that step. These attributes are optional for each run step - by default, the `shell` is set to whatever default value is associated with the runner os (ex: bash =\> Mac). Moreover, the composite action author can map in values from the `inputs` for it's `shell` and `working-directory` attributes at the step level for an action. 
-
-For example,
-
-`action.yml`
-
-
-```yaml
-inputs:
-  shell_1:
-    description: 'Your name'
-    default: 'pwsh'
-steps:
-  - run: echo 1
-    shell: ${{ inputs.shell_1 }}
-```
-
-Note, the workflow file and action file are treated as separate entities. **So, the workflow `defaults` will never change the `shell` and `working-directory` value in the run steps in a composite action.** Note, `defaults` in a workflow only apply to run steps not "uses" steps (steps that use an action).
-
 ### Visualizing Composite Action in the GitHub Actions UI
 We want all the composite action's steps to be condensed into the original composite action node. 
 

releaseNote.md

@@ -1,15 +1,11 @@
 ## Features
-  - Composite Actions Support for Multiple Run Steps (#549, #557, #564, #568, #569, #578, #591, #599, #605, #609, #610, #615, #624) 
+  - Allow registry credentials for job/service containers (#694) 
-  - Prepare to switch GITHUB_ACTION to use ContextName instead of refname (#593)
+
-  - Fold logs for intermediate docker commands (#608)
-  - Add ability to register a runner to the non-default self-hosted runner group (#613)
-  
 ## Bugs
-  - Double quotes around variable so CD works if path contains spaces (#602)
+  - N/A
-  - Bump lodash in /src/Misc/expressionFunc/hashFiles (#603) 
+
-  - Fix poor performance of process spawned from svc daemon (#614)
 ## Misc
-  - Move shared ExecutionContext properties under .Global (#594)
+  - N/A
 
 ## Windows x64
 We recommend configuring the runner in a root folder of the Windows drive (e.g. "C:\actions-runner"). This will help avoid issues related to service identity folder permissions and long file path restrictions on Windows.

releaseVersion

@@ -1 +1 @@
-<Update to ./src/runnerversion when creating release>
+2.273.3

src/Misc/dotnet-install.ps1

@@ -69,6 +69,8 @@
 .PARAMETER ProxyUseDefaultCredentials
     Default: false
     Use default credentials, when using proxy address.
+.PARAMETER ProxyBypassList
+    If set with ProxyAddress, will provide the list of comma separated urls that will bypass the proxy
 .PARAMETER SkipNonVersionedFiles
     Default: false
     Skips installing non-versioned files if they already exist, such as dotnet.exe.
@@ -96,6 +98,7 @@ param(
    [string]$FeedCredential,
    [string]$ProxyAddress,
    [switch]$ProxyUseDefaultCredentials,
+   [string[]]$ProxyBypassList=@(),
    [switch]$SkipNonVersionedFiles,
    [switch]$NoCdn
 )
@@ -119,11 +122,27 @@ $VersionRegEx="/\d+\.\d+[^/]+/"
 $OverrideNonVersionedFiles = !$SkipNonVersionedFiles
 
 function Say($str) {
-    Write-Host "dotnet-install: $str"
+    try
+    {
+        Write-Host "dotnet-install: $str"
+    }
+    catch
+    {
+        # Some platforms cannot utilize Write-Host (Azure Functions, for instance). Fall back to Write-Output
+        Write-Output "dotnet-install: $str"
+    }
 }
 
 function Say-Verbose($str) {
-    Write-Verbose "dotnet-install: $str"
+    try
+    {
+        Write-Verbose "dotnet-install: $str"
+    }
+    catch
+    {
+        # Some platforms cannot utilize Write-Verbose (Azure Functions, for instance). Fall back to Write-Output
+        Write-Output "dotnet-install: $str"
+    }
 }
 
 function Say-Invocation($Invocation) {
@@ -237,7 +256,11 @@ function GetHTTPResponse([Uri] $Uri)
 
             if($ProxyAddress) {
                 $HttpClientHandler = New-Object System.Net.Http.HttpClientHandler
-                $HttpClientHandler.Proxy =  New-Object System.Net.WebProxy -Property @{Address=$ProxyAddress;UseDefaultCredentials=$ProxyUseDefaultCredentials}
+                $HttpClientHandler.Proxy =  New-Object System.Net.WebProxy -Property @{
+                    Address=$ProxyAddress;
+                    UseDefaultCredentials=$ProxyUseDefaultCredentials;
+                    BypassList = $ProxyBypassList;
+                }
                 $HttpClient = New-Object System.Net.Http.HttpClient -ArgumentList $HttpClientHandler
             }
             else {
@@ -695,10 +718,10 @@ Say "Installation finished"
 exit 0
 
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-# SIG # End signature block
+# SIG # End signature block

src/Runner.Common/ExtensionManager.cs

@@ -56,6 +56,10 @@ namespace GitHub.Runner.Common
                     Add<T>(extensions, "GitHub.Runner.Worker.EndGroupCommandExtension, Runner.Worker");
                     Add<T>(extensions, "GitHub.Runner.Worker.EchoCommandExtension, Runner.Worker");
                     break;
+                case "GitHub.Runner.Worker.IFileCommandExtension":
+                    Add<T>(extensions, "GitHub.Runner.Worker.AddPathFileCommand, Runner.Worker");
+                    Add<T>(extensions, "GitHub.Runner.Worker.SetEnvFileCommand, Runner.Worker");
+                    break;
                 default:
                     // This should never happen.
                     throw new NotSupportedException($"Unexpected extension type: '{typeof(T).FullName}'");

src/Runner.Common/JobServer.cs

@@ -16,6 +16,7 @@ namespace GitHub.Runner.Common
         // logging and console
         Task<TaskLog> AppendLogContentAsync(Guid scopeIdentifier, string hubName, Guid planId, int logId, Stream uploadStream, CancellationToken cancellationToken);
         Task AppendTimelineRecordFeedAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, Guid stepId, IList<string> lines, CancellationToken cancellationToken);
+        Task AppendTimelineRecordFeedAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, Guid stepId, IList<string> lines, long startLine, CancellationToken cancellationToken);
         Task<TaskAttachment> CreateAttachmentAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, String type, String name, Stream uploadStream, CancellationToken cancellationToken);
         Task<TaskLog> CreateLogAsync(Guid scopeIdentifier, string hubName, Guid planId, TaskLog log, CancellationToken cancellationToken);
         Task<Timeline> CreateTimelineAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, CancellationToken cancellationToken);
@@ -79,6 +80,12 @@ namespace GitHub.Runner.Common
             return _taskClient.AppendTimelineRecordFeedAsync(scopeIdentifier, hubName, planId, timelineId, timelineRecordId, stepId, lines, cancellationToken: cancellationToken);
         }
 
+        public Task AppendTimelineRecordFeedAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, Guid stepId, IList<string> lines, long startLine, CancellationToken cancellationToken)
+        {
+            CheckConnection();
+            return _taskClient.AppendTimelineRecordFeedAsync(scopeIdentifier, hubName, planId, timelineId, timelineRecordId, stepId, lines, startLine, cancellationToken: cancellationToken);
+        }
+
         public Task<TaskAttachment> CreateAttachmentAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, string type, string name, Stream uploadStream, CancellationToken cancellationToken)
         {
             CheckConnection();

src/Runner.Common/JobServerQueue.cs

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

src/Runner.Worker/ActionManager.cs

@@ -492,7 +492,7 @@ namespace GitHub.Runner.Worker
                     }
                 }
             }
-            executionContext.Output("##[endgroup");
+            executionContext.Output("##[endgroup]");
 
             if (retryCount == 3 && pullExitCode != 0)
             {

src/Runner.Worker/ActionRunner.cs

@@ -145,6 +145,10 @@ namespace GitHub.Runner.Worker
                 stepHost = containerStepHost;
             }
 
+            // Setup File Command Manager
+            var fileCommandManager = HostContext.CreateService<IFileCommandManager>();
+            fileCommandManager.InitializeFiles(ExecutionContext, null);
+
             // Load the inputs.
             ExecutionContext.Debug("Loading inputs");
             var templateEvaluator = ExecutionContext.ToPipelineTemplateEvaluator();
@@ -238,7 +242,15 @@ namespace GitHub.Runner.Worker
             handler.PrintActionDetails(Stage);
 
             // Run the task.
-            await handler.RunAsync(Stage);
+            try 
+            {
+                await handler.RunAsync(Stage);
+            }
+            finally 
+            {
+                fileCommandManager.ProcessFiles(ExecutionContext, ExecutionContext.Global.Container);
+            }
+
         }
 
         public bool TryEvaluateDisplayName(DictionaryContextData contextData, IExecutionContext context)

src/Runner.Worker/ExecutionContext.cs

@@ -260,7 +260,7 @@ namespace GitHub.Runner.Worker
             DictionaryContextData inputsData,
             Dictionary<string, string> envData)
         {
-            step.ExecutionContext = Root.CreateChild(_record.Id, step.DisplayName, _record.Id.ToString("N"), scopeName, step.Action.ContextName, logger: _logger, insideComposite: true, cancellationTokenSource: CancellationTokenSource.CreateLinkedTokenSource(_cancellationTokenSource.Token));
+            step.ExecutionContext = Root.CreateChild(_record.Id, _record.Name, _record.Id.ToString("N"), scopeName, step.Action.ContextName, logger: _logger, insideComposite: true, cancellationTokenSource: CancellationTokenSource.CreateLinkedTokenSource(_cancellationTokenSource.Token));
             step.ExecutionContext.ExpressionValues["inputs"] = inputsData;
             step.ExecutionContext.ExpressionValues["steps"] = Global.StepsContext.GetScope(step.ExecutionContext.GetFullyQualifiedContextName());
 
@@ -384,8 +384,8 @@ 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 "__"
+            // Skip if generated context name. Generated context names start with "__". After M271-ish the server will never send an empty context name.
-            if (!string.IsNullOrEmpty(ContextName))
+            if (!string.IsNullOrEmpty(ContextName) && !ContextName.StartsWith("__", StringComparison.Ordinal))
             {
                 Global.StepsContext.SetOutcome(ScopeName, ContextName, (Outcome ?? Result ?? TaskResult.Succeeded).ToActionResult());
                 Global.StepsContext.SetConclusion(ScopeName, ContextName, (Result ?? TaskResult.Succeeded).ToActionResult());
@@ -447,8 +447,8 @@ namespace GitHub.Runner.Worker
         {
             ArgUtil.NotNullOrEmpty(name, nameof(name));
 
-            // todo: Skip if generated context name. After M271-ish the server will never send an empty context name. Generated context names will start with "__"
+            // Skip if generated context name. Generated context names start with "__". After M271-ish the server will never send an empty context name.
-            if (string.IsNullOrEmpty(ContextName))
+            if (string.IsNullOrEmpty(ContextName) || ContextName.StartsWith("__", StringComparison.Ordinal))
             {
                 reference = null;
                 return;
@@ -717,7 +717,8 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            _jobServerQueue.QueueWebConsoleLine(_record.Id, msg);
+            _jobServerQueue.QueueWebConsoleLine(_record.Id, msg, totalLines);
+            
             return totalLines;
         }
 

src/Runner.Worker/FileCommandManager.cs

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

src/Runner.Worker/GitHubContext.cs

@@ -6,18 +6,20 @@ namespace GitHub.Runner.Worker
 {
     public sealed class GitHubContext : DictionaryContextData, IEnvironmentContextData
     {
-        private readonly HashSet<string> _contextEnvWhitelist = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        private readonly HashSet<string> _contextEnvAllowlist = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
         {
             "action",
             "action_path",
             "actor",
             "api_url",
             "base_ref",
+            "env",
             "event_name",
             "event_path",
             "graphql_url",
             "head_ref",
             "job",
+            "path",
             "ref",
             "repository",
             "repository_owner",
@@ -33,11 +35,23 @@ namespace GitHub.Runner.Worker
         {
             foreach (var data in this)
             {
-                if (_contextEnvWhitelist.Contains(data.Key) && data.Value is StringContextData value)
+                if (_contextEnvAllowlist.Contains(data.Key) && data.Value is StringContextData value)
                 {
                     yield return new KeyValuePair<string, string>($"GITHUB_{data.Key.ToUpperInvariant()}", value);
                 }
             }
         }
+
+        public GitHubContext ShallowCopy()
+        {
+            var copy = new GitHubContext();
+
+            foreach (var pair in this)
+            {
+                copy[pair.Key] = pair.Value;
+            }
+
+            return copy;
+        }
     }
 }

src/Runner.Worker/Handlers/CompositeActionHandler.cs

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

src/Runner.Worker/Handlers/ContainerActionHandler.cs

@@ -161,16 +161,21 @@ namespace GitHub.Runner.Worker.Handlers
             Directory.CreateDirectory(tempHomeDirectory);
             this.Environment["HOME"] = tempHomeDirectory;
 
+            var tempFileCommandDirectory = Path.Combine(tempDirectory, "_runner_file_commands");
+            ArgUtil.Directory(tempFileCommandDirectory, nameof(tempFileCommandDirectory));
+
             var tempWorkflowDirectory = Path.Combine(tempDirectory, "_github_workflow");
             ArgUtil.Directory(tempWorkflowDirectory, nameof(tempWorkflowDirectory));
 
             container.MountVolumes.Add(new MountVolume("/var/run/docker.sock", "/var/run/docker.sock"));
             container.MountVolumes.Add(new MountVolume(tempHomeDirectory, "/github/home"));
             container.MountVolumes.Add(new MountVolume(tempWorkflowDirectory, "/github/workflow"));
+            container.MountVolumes.Add(new MountVolume(tempFileCommandDirectory, "/github/file_commands"));
             container.MountVolumes.Add(new MountVolume(defaultWorkingDirectory, "/github/workspace"));
 
             container.AddPathTranslateMapping(tempHomeDirectory, "/github/home");
             container.AddPathTranslateMapping(tempWorkflowDirectory, "/github/workflow");
+            container.AddPathTranslateMapping(tempFileCommandDirectory, "/github/file_commands");
             container.AddPathTranslateMapping(defaultWorkingDirectory, "/github/workspace");
 
             container.ContainerWorkDirectory = "/github/workspace";

src/Runner.Worker/StepsContext.cs

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

src/Runner.Worker/StepsRunner.cs

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

src/Sdk/DTWebApi/WebApi/TaskHttpClient.cs

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

src/Sdk/DTWebApi/WebApi/TimelineRecordFeedLinesWrapper.cs

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

src/Sdk/DTWebApi/WebApi/TimelineRecordLogLine.cs

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

src/Test/L0/ServiceInterfacesL0.cs

@@ -60,6 +60,7 @@ namespace GitHub.Runner.Common.Tests
             {
                 typeof(IActionCommandExtension),
                 typeof(IExecutionContext),
+                typeof(IFileCommandExtension),
                 typeof(IHandler),
                 typeof(IJobExtension),
                 typeof(IStep),

src/Test/L0/Worker/ActionRunnerL0.cs

@@ -32,6 +32,8 @@ namespace GitHub.Runner.Common.Tests.Worker
         private TestHostContext _hc;
         private ActionRunner _actionRunner;
         private IActionManifestManager _actionManifestManager;
+        private Mock<IFileCommandManager> _fileCommandManager;
+
         private DictionaryContextData _context = new DictionaryContextData();
 
         [Fact]
@@ -362,6 +364,7 @@ namespace GitHub.Runner.Common.Tests.Worker
             _handlerFactory = new Mock<IHandlerFactory>();
             _defaultStepHost = new Mock<IDefaultStepHost>();
             _actionManifestManager = new ActionManifestManager();
+            _fileCommandManager = new Mock<IFileCommandManager>();
             _actionManifestManager.Initialize(_hc);
 
             var githubContext = new GitHubContext();
@@ -394,6 +397,8 @@ namespace GitHub.Runner.Common.Tests.Worker
 
             _hc.EnqueueInstance<IDefaultStepHost>(_defaultStepHost.Object);
 
+            _hc.EnqueueInstance(_fileCommandManager.Object);
+
             // Instance to test.
             _actionRunner = new ActionRunner();
             _actionRunner.Initialize(_hc);

src/Test/L0/Worker/ExecutionContextL0.cs

@@ -116,7 +116,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 var pagingLogger = new Mock<IPagingLogger>();
                 var jobServerQueue = new Mock<IJobServerQueue>();
                 jobServerQueue.Setup(x => x.QueueTimelineRecordUpdate(It.IsAny<Guid>(), It.IsAny<TimelineRecord>()));
-                jobServerQueue.Setup(x => x.QueueWebConsoleLine(It.IsAny<Guid>(), It.IsAny<string>())).Callback((Guid id, string msg) => { hc.GetTrace().Info(msg); });
+                jobServerQueue.Setup(x => x.QueueWebConsoleLine(It.IsAny<Guid>(), It.IsAny<string>(),It.IsAny<long>())).Callback((Guid id, string msg, long? lineNumber) => { hc.GetTrace().Info(msg); });
 
                 hc.EnqueueInstance(pagingLogger.Object);
                 hc.SetSingleton(jobServerQueue.Object);
@@ -137,7 +137,7 @@ namespace GitHub.Runner.Common.Tests.Worker
 
                 ec.Complete();
 
-                jobServerQueue.Verify(x => x.QueueWebConsoleLine(It.IsAny<Guid>(), It.IsAny<string>()), Times.Exactly(10));
+                jobServerQueue.Verify(x => x.QueueWebConsoleLine(It.IsAny<Guid>(), It.IsAny<string>(), It.IsAny<long?>()), Times.Exactly(10));
             }
         }
 
@@ -171,7 +171,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 var pagingLogger5 = new Mock<IPagingLogger>();
                 var jobServerQueue = new Mock<IJobServerQueue>();
                 jobServerQueue.Setup(x => x.QueueTimelineRecordUpdate(It.IsAny<Guid>(), It.IsAny<TimelineRecord>()));
-                jobServerQueue.Setup(x => x.QueueWebConsoleLine(It.IsAny<Guid>(), It.IsAny<string>())).Callback((Guid id, string msg) => { hc.GetTrace().Info(msg); });
+                jobServerQueue.Setup(x => x.QueueWebConsoleLine(It.IsAny<Guid>(), It.IsAny<string>(), It.IsAny<long?>())).Callback((Guid id, string msg, long? lineNumber) => { hc.GetTrace().Info(msg); });
 
                 var actionRunner1 = new ActionRunner();
                 actionRunner1.Initialize(hc);
@@ -269,7 +269,7 @@ namespace GitHub.Runner.Common.Tests.Worker
                 var pagingLogger5 = new Mock<IPagingLogger>();
                 var jobServerQueue = new Mock<IJobServerQueue>();
                 jobServerQueue.Setup(x => x.QueueTimelineRecordUpdate(It.IsAny<Guid>(), It.IsAny<TimelineRecord>()));
-                jobServerQueue.Setup(x => x.QueueWebConsoleLine(It.IsAny<Guid>(), It.IsAny<string>())).Callback((Guid id, string msg) => { hc.GetTrace().Info(msg); });
+                jobServerQueue.Setup(x => x.QueueWebConsoleLine(It.IsAny<Guid>(), It.IsAny<string>(), It.IsAny<long?>())).Callback((Guid id, string msg, long? lineNumber) => { hc.GetTrace().Info(msg); });
 
                 var actionRunner1 = new ActionRunner();
                 actionRunner1.Initialize(hc);

src/Test/L0/Worker/SetEnvFileCommandL0.cs

@@ -0,0 +1,390 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Runtime.CompilerServices;
+using GitHub.Runner.Common.Util;
+using GitHub.Runner.Sdk;
+using GitHub.Runner.Worker;
+using GitHub.Runner.Worker.Container;
+using GitHub.Runner.Worker.Handlers;
+using Moq;
+using Xunit;
+using DTWebApi = GitHub.DistributedTask.WebApi;
+
+namespace GitHub.Runner.Common.Tests.Worker
+{
+    public sealed class SetEnvFileCommandL0
+    {
+        private Mock<IExecutionContext> _executionContext;
+        private List<Tuple<DTWebApi.Issue, string>> _issues;
+        private string _rootDirectory;
+        private SetEnvFileCommand _setEnvFileCommand;
+        private ITraceWriter _trace;
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_DirectoryNotFound()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "directory-not-found", "env");
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(0, _executionContext.Object.Global.EnvironmentVariables.Count);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_NotFound()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "file-not-found");
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(0, _executionContext.Object.Global.EnvironmentVariables.Count);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_EmptyFile()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "empty-file");
+                var content = new List<string>();
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(0, _executionContext.Object.Global.EnvironmentVariables.Count);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple");
+                var content = new List<string>
+                {
+                    "MY_ENV=MY VALUE",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal("MY VALUE", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple_SkipEmptyLines()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple");
+                var content = new List<string>
+                {
+                    string.Empty,
+                    "MY_ENV=my value",
+                    string.Empty,
+                    "MY_ENV_2=my second value",
+                    string.Empty,
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(2, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal("my value", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal("my second value", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple_EmptyValue()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple-empty-value");
+                var content = new List<string>
+                {
+                    "MY_ENV=",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal(string.Empty, _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple_MultipleValues()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple");
+                var content = new List<string>
+                {
+                    "MY_ENV=my value",
+                    "MY_ENV_2=",
+                    "MY_ENV_3=my third value",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(3, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal("my value", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal(string.Empty, _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+                Assert.Equal("my third value", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_3"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Simple_SpecialCharacters()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "simple");
+                var content = new List<string>
+                {
+                    "MY_ENV==abc",
+                    "MY_ENV_2=def=ghi",
+                    "MY_ENV_3=jkl=",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(3, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal("=abc", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal("def=ghi", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+                Assert.Equal("jkl=", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_3"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    "MY_ENV<<EOF",
+                    "line one",
+                    "line two",
+                    "line three",
+                    "EOF",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal($"line one{Environment.NewLine}line two{Environment.NewLine}line three", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc_EmptyValue()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    "MY_ENV<<EOF",
+                    "EOF",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal(string.Empty, _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc_SkipEmptyLines()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    string.Empty,
+                    "MY_ENV<<EOF",
+                    "hello",
+                    "world",
+                    "EOF",
+                    string.Empty,
+                    "MY_ENV_2<<EOF",
+                    "HELLO",
+                    "AGAIN",
+                    "EOF",
+                    string.Empty,
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(2, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal($"hello{Environment.NewLine}world", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal($"HELLO{Environment.NewLine}AGAIN", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+            }
+        }
+
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc_SpecialCharacters()
+        {
+            using (var hostContext = Setup())
+            {
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    "MY_ENV<<=EOF",
+                    "hello",
+                    "one",
+                    "=EOF",
+                    "MY_ENV_2<<<EOF",
+                    "hello",
+                    "two",
+                    "<EOF",
+                    "MY_ENV_3<<EOF",
+                    "hello",
+                    string.Empty,
+                    "three",
+                    string.Empty,
+                    "EOF",
+                    "MY_ENV_4<<EOF",
+                    "hello=four",
+                    "EOF",
+                    "MY_ENV_5<<EOF",
+                    " EOF",
+                    "EOF",
+                };
+                WriteContent(envFile, content);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(5, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal($"hello{Environment.NewLine}one", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+                Assert.Equal($"hello{Environment.NewLine}two", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_2"]);
+                Assert.Equal($"hello{Environment.NewLine}{Environment.NewLine}three{Environment.NewLine}", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_3"]);
+                Assert.Equal($"hello=four", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_4"]);
+                Assert.Equal($" EOF", _executionContext.Object.Global.EnvironmentVariables["MY_ENV_5"]);
+            }
+        }
+
+#if OS_WINDOWS
+        [Fact]
+        [Trait("Level", "L0")]
+        [Trait("Category", "Worker")]
+        public void SetEnvFileCommand_Heredoc_PreservesNewline()
+        {
+            using (var hostContext = Setup())
+            {
+                var newline = "\n";
+                var envFile = Path.Combine(_rootDirectory, "heredoc");
+                var content = new List<string>
+                {
+                    "MY_ENV<<EOF",
+                    "hello",
+                    "world",
+                    "EOF",
+                };
+                WriteContent(envFile, content, newline: newline);
+                _setEnvFileCommand.ProcessCommand(_executionContext.Object, envFile, null);
+                Assert.Equal(0, _issues.Count);
+                Assert.Equal(1, _executionContext.Object.Global.EnvironmentVariables.Count);
+                Assert.Equal($"hello{newline}world", _executionContext.Object.Global.EnvironmentVariables["MY_ENV"]);
+            }
+        }
+#endif
+
+        private void WriteContent(
+            string path,
+            List<string> content,
+            string newline = null)
+        {
+            if (string.IsNullOrEmpty(newline))
+            {
+                newline = Environment.NewLine;
+            }
+
+            var encoding = new UTF8Encoding(true); // Emit BOM
+            var contentStr = string.Join(newline, content);
+            File.WriteAllText(path, contentStr, encoding);
+        }
+
+        private TestHostContext Setup([CallerMemberName] string name = "")
+        {
+            _issues = new List<Tuple<DTWebApi.Issue, string>>();
+
+            var hostContext = new TestHostContext(this, name);
+
+            // Trace
+            _trace = hostContext.GetTrace();
+
+            // Directory for test data
+            var workDirectory = hostContext.GetDirectory(WellKnownDirectory.Work);
+            ArgUtil.NotNullOrEmpty(workDirectory, nameof(workDirectory));
+            Directory.CreateDirectory(workDirectory);
+            _rootDirectory = Path.Combine(workDirectory, nameof(SetEnvFileCommandL0));
+            Directory.CreateDirectory(_rootDirectory);
+
+            // Execution context
+            _executionContext = new Mock<IExecutionContext>();
+            _executionContext.Setup(x => x.Global)
+                .Returns(new GlobalContext
+                {
+                    EnvironmentVariables = new Dictionary<string, string>(VarUtil.EnvironmentVariableKeyComparer),
+                    WriteDebug = true,
+                });
+            _executionContext.Setup(x => x.AddIssue(It.IsAny<DTWebApi.Issue>(), It.IsAny<string>()))
+                .Callback((DTWebApi.Issue issue, string logMessage) =>
+                {
+                    _issues.Add(new Tuple<DTWebApi.Issue, string>(issue, logMessage));
+                    var message = !string.IsNullOrEmpty(logMessage) ? logMessage : issue.Message;
+                    _trace.Info($"Issue '{issue.Type}': {message}");
+                });
+            _executionContext.Setup(x => x.Write(It.IsAny<string>(), It.IsAny<string>()))
+                .Callback((string tag, string message) =>
+                {
+                    _trace.Info($"{tag}{message}");
+                });
+
+            // SetEnvFileCommand
+            _setEnvFileCommand = new SetEnvFileCommand();
+            _setEnvFileCommand.Initialize(hostContext);
+
+            return hostContext;
+        }
+    }
+}

src/Test/L0/Worker/StepsRunnerL0.cs

@@ -44,7 +44,7 @@ namespace GitHub.Runner.Common.Tests.Worker
 
             _contexts = new DictionaryContextData();
             _jobContext = new JobContext();
-            _contexts["github"] = new DictionaryContextData();
+            _contexts["github"] = new GitHubContext();
             _contexts["runner"] = new DictionaryContextData();
             _contexts["job"] = _jobContext;
             _ec.Setup(x => x.ExpressionValues).Returns(_contexts);
@@ -602,7 +602,12 @@ namespace GitHub.Runner.Common.Tests.Worker
             var stepContext = new Mock<IExecutionContext>();
             stepContext.SetupAllProperties();
             stepContext.Setup(x => x.Global).Returns(() => _ec.Object.Global);
-            stepContext.Setup(x => x.ExpressionValues).Returns(new DictionaryContextData());
+            var expressionValues = new DictionaryContextData();
+            foreach (var pair in _ec.Object.ExpressionValues)
+            {
+                expressionValues[pair.Key] = pair.Value;
+            }
+            stepContext.Setup(x => x.ExpressionValues).Returns(expressionValues);
             stepContext.Setup(x => x.ExpressionFunctions).Returns(new List<IFunctionInfo>());
             stepContext.Setup(x => x.JobContext).Returns(_jobContext);
             stepContext.Setup(x => x.ContextName).Returns(step.Object.Action.ContextName);

src/runnerversion

@@ -1 +1 @@
-2.272.0
+2.273.3