ci: Stop trying to hack bash to check for changes

Author: dbanty

.github/check_for_changes.py

@@ -0,0 +1,10 @@
+import subprocess
+
+output = subprocess.run(["git", "status", "--porcelain"], capture_output=True, check=True).stdout
+
+if output == b"":
+    # No changes
+    exit(0)
+
+print(output)
+exit(1)

.github/workflows/checks.yml

@@ -108,7 +108,7 @@ jobs:
         run: |
           poetry run openapi-python-client update --url http://localhost:3000/openapi.json --config integration-tests-config.yaml
       - name: Check for any file changes
-        run: changed_files=$(git status --porcelain | wc -l) && [ changed_files != 0 ] && exit 1
+        run: python .github/check_for_changes.py
       - name: Cache Generated Client Dependencies
         uses: actions/cache@v2
         with: