Add a git action to process the event of pr labeled (#22285)

* Add a git action to process the event of pr labeled

* Update the comments

* Update the comments

* Update the comments

* Update the comments

Author: wyunchi-ms

.github/workflows/pr-labeled.yml

@@ -0,0 +1,20 @@
+name: pr-labeled
+run-name: Triggered by pr label
+env:
+  GH_TOKEN: ${{ github.token }}
+  PR: ${{ github.event.pull_request.html_url }}
+on:
+  pull_request:
+    types:
+      - labeled
+jobs:
+  process_labels:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        sparse-checkout: |
+          .github
+    - name: process label
+      shell: pwsh
+      run: .github/workflows/script/PrLabeled.ps1 -LabelName "${{ github.event.label.name }}" -PrUrl $env:PR

.github/workflows/script/PrLabeled.ps1

@@ -0,0 +1,65 @@
+param(
+    [System.String]
+    $LabelName,
+    [System.String]
+    $PrUrl
+)
+Write-Host "Processing PR $PrUrl with label $LabelName"
+
+$CommentDict = @{
+    "DO NOT SQUASH :no_entry_sign:" = @"
+‼️ Please merge this PR with commits! You can enable this option in the setting page.
+‼️ Remember close that option after merging this PR!
+"@
+    "Do Not Merge :no_entry_sign:" = @"
+‼️ DO NOT MERGE THIS PR ‼️
+"@
+    "Breaking Change Release" = @"
+To PR author,
+This PR was labeled "Breaking Change Release" because it contains breaking changes.
+According to our [policy](https://eng.ms/docs/cloud-ai-platform/azure-core/azure-management-and-platforms/control-plane-bburns/azure-cli-tools-azure-cli-powershell-and-terraform/azure-cli-tools/devguide/azps/breaking-change/breaking-changes-policy), breaking changes can only take place during major release and must be preannounced.
+Please follow our [guide](https://eng.ms/docs/cloud-ai-platform/azure-core/azure-management-and-platforms/control-plane-bburns/azure-cli-tools-azure-cli-powershell-and-terraform/azure-cli-tools/devguide/azps/breaking-change/breaking-changes-process) on the detailed steps.
+"@
+    "needs-revision" = @"
+This PR was labeled "needs-revision" because it has unresolved review comments or CI failures.
+Please resolve all open review comments and make sure all CI checks are green. Refer to our guide (link TBD) to troubleshoot common CI failures.
+"@
+}
+
+
+function Test-LabelCommentIsAlreadyAdded {
+    param(
+        [System.String]
+        $Comment,
+        [System.String]
+        $PrUrl
+    )
+    $existingComments = (gh pr view $PrUrl --json comments | ConvertFrom-Json).comments | Where-Object { $_.body -eq $comment }
+    if ($existingComments.Count -gt 0) {
+        return $true
+    }
+    return $false
+}
+
+function Get-Comment {
+    param(
+        [System.String]
+        $LabelName
+    )
+    if ($CommentDict.ContainsKey($LabelName)) {
+        return $CommentDict[$LabelName]
+    }
+    return $null
+}
+
+if ($CommentDict.ContainsKey($LabelName)) {
+    $comment = Get-Comment -LabelName $LabelName
+    Write-Host "Try to add comment: $comment"
+    $isCommentAlreadyAdded = Test-LabelCommentIsAlreadyAdded -Comment $comment -PrUrl $PrUrl
+    if ($isCommentAlreadyAdded) {
+        Write-Host "Comment is already added"
+    }
+    else {
+        gh pr comment $PrUrl --body $comment
+    }
+}