Function lock_pex_project_dir

pex/hashing.py:192–210

()

@contextmanager
def lock_pex_project_dir():
    # type: () -> Iterator[None]

    if "_PEX_LOCKED_PROJECT_DIR" in os.environ:
        # N.B.: We're in a subprocess of a root Pex invocation that holds the lock; so it's
        # ok to proceed.
        yield
        return

    from pex.fs import lock
    from pex.fs.lock import FileLockStyle

    lck = lock.acquire(__file__ + ".lck", exclusive=True, style=FileLockStyle.BSD)
    os.environ["_PEX_LOCKED_PROJECT_DIR"] = str(os.getpid())
    try:
        yield
    finally:
        lck.release()
        del os.environ["_PEX_LOCKED_PROJECT_DIR"]


@contextmanager