Simplified approach

Author: ralfhandl

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

@@ -1,30 +1,22 @@
 name: check-restricted-files
 
-# Autor: @ralfhandl
+# Author: @ralfhandl
 # Issue: https://github.com/OAI/OpenAPI-Specification/issues/3432
 
-# This workflow checks for changes of restricted files in a pull request
+# This workflow fails if restricted files are changed in a pull request
 
 on:
-  - pull_request
+  pull_request:
+    paths:
+      - 'schemas/**/*.yaml'
+      - 'versions/*.md'
 
 jobs:
   check-files:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
       - name: Check changed files
         shell: bash
         run: |
-          set +e
-
-          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
+          echo This PR contains changes to files that should not be changed
+          exit 1