ci: Adjust CI Build for Doc-Only PRs validations

azure-pipelines.yml

@@ -13,8 +13,8 @@
     exclude:
     - .github/
     # don't trigger the CI if only docs files are changed
-    - doc/*
-    - '**/*.md'
+    # - doc/*
+    # - '**/*.md'
 
 pr: 
   branches:
@@ -31,8 +31,8 @@ pr:
     exclude:
     - .github/
     # don't trigger the CI if only docs files are changed
-    - doc/*
-    - '**/*.md'
+    # - doc/*
+    # - '**/*.md'
 
 variables:
   # Path where packages (nuget or app packages) will be copied to.
@@ -49,18 +49,46 @@ variables:
   # AndroidNdkDirectory: C:\Microsoft\AndroidNDK64\android-ndk-r16b
 
 stages:
+- stage: DetermineChanges
+  jobs:
+  - job: EvaluateChanges
+    displayName: 'Check for Doc Only Changes'
+    pool:
+      vmImage: 'ubuntu-latest'
+    steps:
+    - powershell: |
+        $files = git diff HEAD HEAD~ --name-only
+        $docsOnly = $true
+        
+        foreach ($name in $files -split ' ') {
+          if (-not($name -like '*.md' -or $name -like '*/toc.yml')) {
+            $docsOnly = $false
+            break
+          }
+        }
+        
+        # Promote the docsOnly variable to a pipeline variable
+        Write-Host "##vso[task.setvariable variable=docsOnly;]$docsOnly"
+
 - stage: Validations
   displayName: Validations
+  dependsOn: DetermineChanges
+  # Trigger this stage when docs files are changed
+  condition: eq(variables['docsOnly'], 'true')
   jobs:
   - template: build/stage-validations.yml
 
 - stage: Packages
-  dependsOn: Validations
+  dependsOn: DetermineChanges
+  # Don't trigger this stage if only docs files are changed
+  condition: ne(variables['docsOnly'], 'true')
   jobs:
   - template: build/stage-build-packages.yml
 
 - stage: Build_Samples
-  dependsOn: Validations
+  dependsOn: DetermineChanges
+  # Don't trigger this stage if only docs files are changed
+  condition: ne(variables['docsOnly'], 'true')
   jobs:
     - template: build/stage-build-ios.yml
     - template: build/stage-build-android.yml