[ci] Fail build if any git tracked files were modified.

Author: jpobst

build-tools/automation/azure-pipelines.yaml

@@ -61,6 +61,8 @@ jobs:
       nativeAotRid: win-x64
       platformName: .NET - Windows
 
+  - template: templates\fail-on-dirty-tree.yaml
+
   - template: templates\fail-on-issue.yaml
 
   - task: PublishPipelineArtifact@1
@@ -92,6 +94,8 @@ jobs:
       nativeAotRid: osx-x64
       platformName: .NET - MacOS
 
+  - template: templates\fail-on-dirty-tree.yaml
+
   - template: templates\fail-on-issue.yaml
 
 

build-tools/automation/templates/fail-on-dirty-tree.yaml

@@ -0,0 +1,20 @@
+# Ensure the build did not produce any modified checked in files
+
+parameters:
+  condition: succeeded()
+
+steps:
+- powershell: |
+    # Run this to log the output for the user
+    git status
+
+    # Run this to error the build if untracked files
+    $process= git status --porcelain --untracked-files=no
+
+    if ($process)
+    {
+        Write-Host "##vso[task.logissue type=error]git tree has modified tracked files."
+        Write-Host "##vso[task.complete result=Failed;]"
+    }
+  displayName: Ensure no modified committed files
+  condition: ${{ parameters.condition }}