comparison mercurial/lock.py @ 27797:054abf2377e8

lock: turn a lock into a Python context manager

This lets us greatly simply acquire/release cycles.

Code pattern before:

  try:
    lock = repo.lock()
    # zillions of lines of code
  finally:
    lock.release()

And after:

  with repo.lock():
    # ...

27796:f7f3958d39c0

        self.postrelease  = []
        self.pid = self._getpid()
        self.delay = self.lock()
        if self.acquirefn:
            self.acquirefn()

    def __del__(self):
        if self.held:
            warnings.warn("use lock.release instead of del lock",
                    category=DeprecationWarning,

27797:054abf2377e8

        self.postrelease  = []
        self.pid = self._getpid()
        self.delay = self.lock()
        if self.acquirefn:
            self.acquirefn()

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc_value, exc_tb):
        self.release()

    def __del__(self):
        if self.held:
            warnings.warn("use lock.release instead of del lock",
                    category=DeprecationWarning,