Cherrypicking based on branch labels added to the parent PR (#788)

Author: jyejare

.github/workflows/auto_cherry_pick.yml

@@ -6,69 +6,65 @@ on:
     types:
       - closed
 
+# Github & Parent PR Env vars
+env:
+  assignee: ${{ github.event.pull_request.assignee.login }}
+  title: ${{ github.event.pull_request.title }}
+  number: ${{ github.event.number }}
+
 jobs:
-  previous-branch:
-    if: github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'CherryPick')
-    name: Calculate previous branch name
-    runs-on: ubuntu-latest
-    outputs:
-      previous_branch: ${{ steps.set-branch.outputs.previous_branch }}
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 0
-      - id: set-branch
-        run: echo "previous_branch=$(if [ $GITHUB_BASE_REF  == 'master' ]; then echo $(git branch -rl 'origin/6.*.z' --format='%(refname:lstrip=-1)' | sort --version-sort | tail -n1); else echo '6.'$(($(echo $GITHUB_BASE_REF | cut -d. -f2) - 1))'.z'; fi)" >> $GITHUB_OUTPUT
 
+  # Auto CherryPicking and Failure Recording
   auto-cherry-pick:
-    name: Auto Cherry Pick to previous branch
     if: github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'CherryPick')
-    needs: previous-branch
+    name: Auto Cherry Pick to labeled branches
     runs-on: ubuntu-latest
-    env:
-      TO_BRANCH: ${{ needs.previous-branch.outputs.previous_branch }}
+    strategy:
+      matrix:
+        label: ${{ github.event.pull_request.labels.*.name }}
+
     steps:
+      ## Nailgun Repo Checkout
       - uses: actions/checkout@v3
+        if: ${{ startsWith(matrix.label, '6.') && matrix.label != github.base_ref }}
         with:
           fetch-depth: 0
-      - name: Cherry pick into ${{ env.TO_BRANCH }}
+
+      ## CherryPicking and AutoMerging
+      - name: Cherrypicking to zStream branch
+        id: cherrypick
+        if: ${{ startsWith(matrix.label, '6.') && matrix.label != github.base_ref }}
         uses: jyejare/github-cherry-pick-action@main
         with:
           token: ${{ secrets.CHERRYPICK_PAT }}
-          branch: ${{ env.TO_BRANCH }}
+          branch: ${{ matrix.label }}
           labels: |
             Auto_Cherry_Picked
-            ${{ env.TO_BRANCH }}
-          assignees: "${{ github.event.pull_request.assignee.login }}"
+            ${{ matrix.label }}
+          assignees: ${{ env.assignee }}
 
-  create-issue:
-    runs-on: ubuntu-latest
-    if: ${{ always() && contains(join(needs.*.result, ','), 'failure') }}
-    needs: [previous-branch, auto-cherry-pick]
-    env:
-      TO_BRANCH: ${{ needs.previous-branch.outputs.previous_branch }}
-    steps:
-      - name: Create Issue on Failed Auto Cherrypick
+      ## Failure Logging to issues and GChat Group
+      - name: Create Github issue on cherrypick failure
+        id: create-issue
+        if: ${{ always() && steps.cherrypick.outcome == 'failure' }}
         uses: dacbd/create-issue-action@main
         with:
           token: ${{ secrets.CHERRYPICK_PAT }}
-          title: "[Failed-AutoCherryPick] - ${{ github.event.pull_request.title }}"
+          title: "[Failed-AutoCherryPick] - ${{ env.title }}"
           body: |
             #### Auto-Cherry-Pick WorkFlow Failure:
-            - To Branch: ${{ env.TO_BRANCH }}
+            - To Branch: ${{ matrix.label }}
             - [Failed Cherrypick Action](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})
-            - [Parent Pull Request](https://github.com/${{ github.repository }}/pull/${{ github.event.number }})
-          labels: Failed_AutoCherryPick,${{ env.TO_BRANCH }}
-          assignees: "${{ github.event.pull_request.assignee.login }}"
-
-  google-chat-notification:
-    runs-on: ubuntu-latest
-    if: ${{ always() && contains(join(needs.*.result, ','), 'failure') }}
-    needs: auto-cherry-pick
-    steps:
-      - name: Google Chat Notification - Airgun
-        uses: Co-qn/google-chat-notification@releases/v1
+            - [Parent Pull Request](https://github.com/${{ github.repository }}/pull/${{ env.number }})
+          labels: Failed_AutoCherryPick,${{ matrix.label }}
+          assignees: ${{ env.assignee }}
+      - name: Send Google Chat notification on cherrypick failure
+        id: google-chat-notification
+        if: ${{ always() && steps.cherrypick.outcome == 'failure' }}
+        uses: omkarkhatavkar/google-chat-notification@master
         with:
-          name: "${{ github.event.pull_request.title }}"
+          name: ${{ env.title }}
           url: ${{ secrets.GCHAT_REVIEWERS_WEBHOOK }}
+          issue_url: ${{ steps.create-issue.outputs.html_url }}
+          author: ${{ env.assignee }}
           status: failure