Deploy hooks

templates.py

@@ -90,15 +90,26 @@ def new(args: argparse.Namespace) -> None:
         subprocess.run(["make", "env"], cwd=dest, check=True)
 
 
+def git_dirty() -> bool:
+    result = subprocess.run(["git", "status", "--porcelain"], capture_output=True, text=True, check=False)
+    return bool(result.stdout.strip())
+
+
 def update(args: argparse.Namespace) -> None:
     answers = sorted(Path(".copier").glob("*.yml"))
     if args.parts:
         answers = [Path(".copier") / f"{p}.yml" for p in args.parts]
     if not answers:
         sys.exit("no .copier/*.yml here")
+    if git_dirty():
+        sys.exit("working tree is dirty, commit or stash first")
     for file in answers:
         run_update(".", answers_file=str(file), unsafe=True, overwrite=True,
                    skip_answered=not args.ask, defaults=args.defaults, vcs_ref=REF)
+        if git_dirty():
+            subprocess.run(["git", "add", "-A"], check=True)
+            subprocess.run(["git", "commit", "-qm", f"Update {file.stem} template"], check=True)
+            print(f"committed {file.stem} update")
 
 
 def main() -> None: