view tests/lockdelay.py @ 48691:b4bc9c4f925d

debugbuilddag: add a flag to allow running it from a non-empty repository

Allow that by default seems "dangerous", but having a flag to make it possible
will be useful to help building some repository incrementally. The newly introduced support is basic, but already useful.

Differential Revision: https://phab.mercurial-scm.org/D12094

# Dummy extension that adds a delay after acquiring a lock.
#
# This extension can be used to test race conditions between lock acquisition.

from __future__ import absolute_import

import os
import time


def reposetup(ui, repo):
    class delayedlockrepo(repo.__class__):
        def lock(self, wait=True):
            delay = float(os.environ.get('HGPRELOCKDELAY', '0.0'))
            if delay:
                time.sleep(delay)
            res = super(delayedlockrepo, self).lock(wait=wait)
            delay = float(os.environ.get('HGPOSTLOCKDELAY', '0.0'))
            if delay:
                time.sleep(delay)
            return res

    repo.__class__ = delayedlockrepo