trying to add ruff only on changed files

.github/workflows/rust.yml

@@ -1,8 +1,25 @@
-name: Ruff
+# name: Ruff
+# on: [ push, pull_request ]
+# jobs:
+#   ruff:
+#     runs-on: ubuntu-latest
+#     steps:
+#       - uses: actions/checkout@v4
+#       - uses: chartboost/ruff-action@v1
+name: Ruff on Changed Files
+
 on: [ push, pull_request ]
+
 jobs:
   ruff:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: chartboost/ruff-action@v1
+      - uses: tj-actions/changed-files@v35  # Identify changed files
+        id: changed_files
+      - name: Run Ruff only on changes (optional)
+        run: |
+          if [[ $(echo ${{ steps.changed_files.outputs.all_changed_files }} | grep -q ".") ]]; then
+            # Use ruff-action with `--check` flag here
+            uses: chartboost/ruff-action@v1 with: args: --check
+          fi