Update .gitea/workflows/compressimage.yml (#14)

Reviewed-on: #14

.gitea/workflows/compressimage.yml

@@ -23,11 +23,9 @@ jobs:
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
-
-      - name: Debug Event
-        run: |
-          echo "Base: ${{ gitea.base_ref }}"
-          echo "Head: ${{ gitea.head_ref }}"
+        with:
+          fetch-depth: 0
+          ref: ${{ gitea.head_ref }}   # IMPORTANT
 
       - name: Install Image Tools
         run: |
@@ -47,4 +45,23 @@ jobs:
       - name: Optimize PNG
         run: |
           find . -type f -iname "*.png" \
-          -exec pngquant --force --ext .png --quality=75-90 {} \;
+          -exec pngquant --force --ext .png --quality=75-90 {} \;
+
+      # Commit changes if any
+      - name: Commit changes
+        run: |
+          git config --global user.name "CI Bot"
+          git config --global user.email "ci@local"
+
+          if [ -n "$(git status --porcelain)" ]; then
+            git add .
+            git commit -m "chore: optimize images via CI"
+          else
+            echo "No changes to commit"
+          fi
+
+      # Push back to PR branch
+      - name: Push changes
+        if: success()
+        run: |
+          git push origin HEAD:${{ gitea.head_ref }}