add check_projen_files

pre_commit_hooks/check_projen_files.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+import subprocess
+import sys
+
+def main():
+    projen_process = subprocess.run('yarn projen', shell=True)
+    
+    if projen_process.returncode != 0:
+        print(f'Error: "yarn projen" failed with exit status {projen_process.returncode}')
+        sys.exit(projen_process.returncode)
+
+    git_status = subprocess.run('git diff', capture_output=True, shell=True, text=True)
+    if git_status.stdout.strip():
+        print("Uncommitted changes found:")
+        print(git_status.stdout)
+        print('Have you forgotten to run "yarn projen" and commit changes?')
+        sys.exit(1)
+
+if __name__ == '__main__':
+    raise SystemExit(main())