view tests/lockdelay.py @ 39163:26f3d075f36e

debugcommands: use a revset instead of dagutil

All this code was doing was finding the nodes that are heads
from the ancestors of an input set. This can easily be expressed
with a revset without having to go through dagutil.

This was the last use of ancestorset() outside of dagutil itself.

Differential Revision: https://phab.mercurial-scm.org/D4308

# 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):
            delay = float(os.environ.get('HGPRELOCKDELAY', '0.0'))
            if delay:
                time.sleep(delay)
            res = super(delayedlockrepo, self).lock()
            delay = float(os.environ.get('HGPOSTLOCKDELAY', '0.0'))
            if delay:
                time.sleep(delay)
            return res
    repo.__class__ = delayedlockrepo