Update check-restricted-files.yaml

Author: ralfhandl

.github/workflows/check-restricted-files.yaml

@@ -24,11 +24,10 @@ jobs:
         id: check-changes
         shell: bash
         run: |
-          echo github.event_name=${{ github.event_name }}
-          echo github.event.pull_request.base.sha=${{ github.event.pull_request.base.sha }}
-          echo github.event.pull_request.base.ref=${{ github.event.pull_request.base.ref }}
-          echo github.event.pull_request.head.sha=${{ github.event.pull_request.head.sha }}
-          echo github.event.pull_request.head.ref=${{ github.event.pull_request.head.ref }}
-          echo
-          echo Diff between ${{ github.event.pull_request.head.ref }} and ${{ github.event.pull_request.base.ref }}
+          # TODO: skip if base.ref is main
+
           git diff --exit-code --name-only ${{ github.event.pull_request.head.sha }} ${{ github.event.pull_request.base.sha }} -- schemas versions
+          if [ $? -ne 0 ]; then
+            echo This PR contains changes to files that should not be changed on ${{ github.event.pull_request.base.ref }}
+            exit 1
+          fi