Enhance Jekyll PR preview workflow with cleanup

.github/workflows/preview.yml

@@ -2,18 +2,16 @@ name: Jekyll PR Previews
 
 on:
   pull_request:
+    types: [opened, synchronize, reopened, closed]
 
 permissions:
-  contents: read
-  pages: write
-  id-token: write
+  contents: write     # Required to push to preview branch
   pull-requests: write
 
 jobs:
-  build:
+  build-preview:
+    if: github.event.action != 'closed'
     runs-on: ubuntu-latest
-    outputs:
-      pr_path: ${{ steps.setpath.outputs.pr_path }}
 
     steps:
       - name: Checkout
@@ -22,45 +20,50 @@ jobs:
       - name: Setup Ruby
         uses: ruby/setup-ruby@8aeb6ff8030dd539317f8e1769a044873b56ea71 # v1.268.0
         with:
-          ruby-version: "3.2"
+          ruby-version: 3.2
           bundler-cache: true
+      - name: Remove CNAME if present
+        run: rm -f CNAME
 
-      # Determine output folder: main → root, PR → /pr-<number>/
-      - name: Determine output path
-        id: setpath
-        run: |
-          echo "pr_path=pr-${{ github.event.pull_request.number }}" >> $GITHUB_OUTPUT
-
-      # Build Jekyll
       - name: Build Jekyll
         run: |
-          DEST="./_site/${{ steps.setpath.outputs.pr_path }}"
-          mkdir -p "$DEST"
-          bundle exec jekyll build --destination "$DEST" --trace --baseurl "/pr-${{ github.event.pull_request.number }}/"
+          bundle exec jekyll build --destination _site --baseurl "/pr-${{ github.event.number }}"
 
-      # Upload the artifact for deployment
-      - name: Upload Pages Artifact
-        uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b # v4.0.0
+      # Deploy ONLY the preview to a separate branch
+      - name: Deploy Preview to pr-previews branch
+        uses: JamesIves/github-pages-deploy-action@v4
         with:
-          path: _site
-
-  deploy:
-    runs-on: ubuntu-latest
-    needs: build
+          folder: _site
+          branch: main
+          target-folder: pr-${{ github.event.number }}
+          clean: false                 # Do NOT wipe other previews
 
-    # Deploy for both PRs and main
-    steps:
-      - name: Deploy to GitHub Pages
-        id: deploy
-        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4.0.5
-
-      # Comment PR preview URL
-      - name: Comment PR Preview URL
+      # Comment preview link onto the PR
+      - name: Comment Preview Link
         uses: peter-evans/create-or-update-comment@e8674b075228eee787fea43ef493e45ece1004c9 # v5.0.0
         with:
           issue-number: ${{ github.event.pull_request.number }}
           body: |
-            🔍 **Unique Jekyll PR Preview Ready**
+            🚀 **PR Preview Ready**
+            Your preview is available at:
 
-            Preview URL:  
             **https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/pr-${{ github.event.pull_request.number }}/**
+
+  cleanup:
+    if: github.event.action == 'closed'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout preview branch
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        with:
+          ref: pr-previews
+
+      - name: Remove PR preview folder
+        run: |
+          rm -rf pr-${{ github.event.pull_request.number }}
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add -A
+          git commit -m "Remove preview for PR #${{ github.event.pull_request.number }}" || echo "Nothing to delete"
+          git push