Switch to a gha to get changed files

Signed-off-by: Ryan Liang <[email protected]>

.github/workflows/lint.yml

@@ -54,21 +54,19 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.sha }}
 
-      - name: Get list of changed files
-        id: files
-        run: |
-          BASE_SHA="${{ github.event.pull_request.base.sha }}"
-          HEAD_SHA="${{ github.event.pull_request.head.sha }}"
-          git fetch origin $BASE_SHA
-          CHANGED_FILES=$(git diff --name-only $BASE_SHA...$HEAD_SHA | grep -E "\.(js|ts|tsx)$")
-          echo "::set-output name=changed::${CHANGED_FILES}"
-
+      - name: Get changed files
+        id: changed-files
+        uses: jitterbit/get-changed-files@v1
+        with:
+          format: 'json'
+
       - name: Lint Changed Files
         run: |
-          CHANGED_FILES="${{ steps.files.outputs.changed }}"
+          CHANGED_FILES="${{ steps.changed-files.outputs.all }}"
           if [ -n "$CHANGED_FILES" ]; then
             echo "Linting changed files..."
+            # Replace this with your linting command, making sure to pass in the changed files
             yarn lint $CHANGED_FILES
           else
-            echo "No JavaScript/TypeScript files to lint."
+            echo "No files to lint."
           fi