Function start_watch_thread

code_review_graph/incremental.py:1211–1234

Start watch mode in a background thread. Returns the started thread, or None if watchdog is unavailable.

(
    repo_root: Path,
    store: GraphStore,
    daemon: bool = True,
)

def start_watch_thread(
    repo_root: Path,
    store: GraphStore,
    daemon: bool = True,
) -> threading.Thread | None:
    """Start watch mode in a background thread.

    Returns the started thread, or None if watchdog is unavailable.
    """
    try:
        import watchdog  # noqa: F401
    except ImportError:
        logger.warning("watchdog not installed; auto-watch disabled")
        return None

    thread = threading.Thread(
        target=watch,
        args=(repo_root, store),
        daemon=daemon,
        name="crg-watch",
    )
    thread.start()
    logger.info("Auto-watch started for %s", repo_root)
    return thread