view tests/lockdelay.py @ 45218:3ea3b85df03f

fix: update documentation to reflect preference for --source over --rev

I should have updated the documentation in 5205b46bd887 (fix: add a -s
option to format a revision and its descendants, 2020-03-13) and/or
a6ef1e8e2f6d (fix: mark -r as advanced, 2020-03-13)...

Differential Revision: https://phab.mercurial-scm.org/D8808

# 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