Add workflow to check for deleted assets (#5142)

.github/workflows/check_for_deleted_assets.yml

@@ -0,0 +1,56 @@
+name: Deleted Assets Workflow
+on:
+  pull_request:
+    branches: [main]
+    types: [opened, synchronize, labeled]
+env:
+  DIFF_DIRECTORIES: 'public'
+jobs:
+  onPrOpen:
+    name: Check if assets were deleted on PR opened
+    runs-on: ubuntu-latest
+    if: github.event.action == 'opened'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          # Minimal depth 2 so we can checkout the commit before possible merge commit.
+          fetch-depth: 2
+      - name: Get count of deleted files
+        env:
+          GITHUB_PULL_REQUEST_HEAD_SHA: ${{ github.pull_request.head.sha }}
+        run: |
+          git fetch origin main
+          echo "DELETED_FILES_ON_OPENED=$(git diff --name-status --diff-filter=D origin/main -- ${{ env.DIFF_DIRECTORIES }} ${{ env.GITHUB_PULL_REQUEST_HEAD_SHA }} -- ${{ env.DIFF_DIRECTORIES }} | wc -l)" >> $GITHUB_ENV
+          echo "Deleted file count: ${{ env.DELETED_FILES_ON_OPENED }}"
+      - name: Fail status check if there are deleted files
+        if: ${{ env.DELETED_FILES_ON_OPENED > 0 }}
+        run: exit 1
+  onPrSync:
+    name: Check if assets were deleted on PR sync
+    runs-on: ubuntu-latest
+    if: github.event.action == 'synchronize'
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          # Minimal depth 2 so we can checkout the commit before possible merge commit.
+          fetch-depth: 2
+      - name: Get count of deleted files from last sync
+        env:
+          GITHUB_EVENT_BEFORE: ${{ github.event.before }}
+          GITHUB_EVENT_AFTER: ${{ github.event.after }}
+        run: |
+          git fetch origin ${{ github.event.before }} --depth=1
+          echo "DELETED_FILES_ON_SYNC=$(git diff --name-status --diff-filter=D ${{ env.GITHUB_EVENT_BEFORE}} -- ${{ env.DIFF_DIRECTORIES }} ${{ env.GITHUB_EVENT_AFTER }} -- ${{ env.DIFF_DIRECTORIES }} | wc -l)" >> $GITHUB_ENV
+          echo "Deleted file count: ${{ env.DELETED_FILES_ON_SYNC }}"
+      - name: Fail status check if there are deleted files
+        if: ${{ env.DELETED_FILES_ON_SYNC > 0 }}
+        run: exit 1
+  failStatusCheck:
+    name: Fail status check if assets have not been verified
+    runs-on: ubuntu-latest
+    if: contains(github.event.pull_request.labels.*.name, 'deleted-assets')
+    steps:
+      - name: Exit with error
+        run: exit 1

.mergify.yml

@@ -24,3 +24,19 @@ pull_request_rules:
       label:
         add:
           - 'redirects-needed'
+  - name: Remove verified-assets label if deleted-assets label is added
+    conditions:
+      - label="deleted-assets"
+    actions:
+      label:
+        remove:
+          - 'verified-assets'
+  - name: Add deleted-assets label if status checks fail
+    conditions:
+      - or:
+        - check-failure="Check if assets were deleted on PR opened"
+        - check-failure="Check if assets were deleted on PR sync"
+    actions:
+      label:
+        add:
+          - 'deleted-assets'