commit_lint python quick script

gistfile1.txt

def commit_lint() -> None:
    commit_msg_file = None
    if len(sys.argv) > 1:
        commit_msg_file = sys.argv[1]

    if commit_msg_file:
        from pathlib import Path

        commit_msg = Path(commit_msg_file).read_text(encoding="utf-8").strip()
    else:
        commit_msg = sys.stdin.read().strip()

    first_line = commit_msg.split("\n")[0].strip()

    if not first_line:
        print("ERROR: Empty commit message")
        sys.exit(1)

    print(f"Validating commit message: {first_line}")

    if first_line.startswith(("Merge ", "Revert ")):
        print("Skipping validation for merge/revert commit")
        return

    pattern = r"^(feat|fix|docs|style|refactor|test|chore|perf|ci|build)(\([^)]+\))?!?: .+"
    if not re.match(pattern, first_line):
        print("")
        print("ERROR: Invalid commit message format!")
        print("=" * 60)
        print("Expected format: type(scope): description")
        print("")
        print("Valid types:")
        print("   feat, fix, docs, style, refactor, test, chore, perf, ci, build")
        print("")
        print("Examples:")
        print("   feat: add user authentication system")
        print("   fix(auth): resolve login timeout issue")
        print("   docs: update API documentation")
        print("")
        print(f"Your commit message: '{first_line}'")
        print("=" * 60)
        sys.exit(1)

    description = first_line.split(":", 1)[1].strip()

    if len(description) < 5:
        print("")
        print("ERROR: Commit description too short!")
        print("Description must be at least 5 characters long")
        print(f"Your description: '{description}' ({len(description)} characters)")
        sys.exit(1)

    print("SUCCESS: Commit message is valid!")

    type_match = re.match(r"^([^(:!]+)", first_line)
    if type_match:
        commit_type = type_match.group(1)
        print(f"   Type: {commit_type}")

    if "!:" in first_line:
        print("   WARNING: Breaking change detected")

    scope_match = re.search(r"\(([^)]+)\)", first_line)
    if scope_match:
        scope = scope_match.group(1)
        print(f"   Scope: {scope}")

    print(f"   Description: {description}")