comparison mercurial/scmutil.py @ 26490:f0d730efb02f

scmutil: add a way for a subprocess to be run with an inheritable lock

This is part of a series that will allow locks to be inherited by subprocesses
in limited circumstances.

In an upcoming patch, we'll add an API for the wlock to be inherited.

26489:2a3fc0272e3f

    def __delete__(self, obj):
        try:
            del obj.__dict__[self.name]
        except KeyError:
            raise AttributeError(self.name)

26490:f0d730efb02f

    def __delete__(self, obj):
        try:
            del obj.__dict__[self.name]
        except KeyError:
            raise AttributeError(self.name)

def _locksub(repo, lock, envvar, cmd, environ=None, *args, **kwargs):
    if lock is None:
        raise error.LockInheritanceContractViolation(
            'lock can only be inherited while held')
    if environ is None:
        environ = {}
    with lock.inherit() as locker:
        environ[envvar] = locker
        return repo.ui.system(cmd, environ=environ, *args, **kwargs)