Filtering pr - building preview only on specific labels

Author: lukdog

.github/workflows/preview.yml

@@ -5,14 +5,15 @@ on:
     branches:
       - vercel-preview
   pull_request:
-    types: [opened, synchronize]
+    types: [opened, synchronize, labeled]
 
 concurrency:
-  group: vercel
+  group: netlify
   cancel-in-progress: false
 
 jobs:
   run:
+    if: ${{ github.event.label.name == 'preview' }}
     runs-on: ubuntu-latest
     env:
       REPO_ACCESS_TOKEN: ${{ secrets.REPO_ACCESS_TOKEN }}
@@ -69,4 +70,20 @@ jobs:
             --dir public \
             --site ${{ secrets.NETLIFY_SITE_ID }} \
             --auth ${{ secrets.NETLIFY_AUTH_TOKEN }} \
-            --json
+            --json \
+            > deploy_output.json
+      
+      - name: Generate URL Preview
+        id: url_preview
+        run: |
+          NETLIFY_PREVIEW_URL=$(jq -r '.deploy_url' deploy_output.json)
+          echo "NETLIFY_PREVIEW_URL=$NETLIFY_PREVIEW_URL" >> "$GITHUB_OUTPUT"
+
+      - name: Create PR Preview Comment
+        if: github.event_name == 'pull_request'
+        uses: peter-evans/[email protected]
+        with:
+          issue-number: ${{ github.event.pull_request.number }}
+          body: |
+            🚀 Preview this PR: ${{ steps.url_preview.outputs.NETLIFY_PREVIEW_URL }}
+            📍 Commit SHA: ${{ github.sha }}