tests/lockdelay.py

dirstate-v2: Document flags/mode/size/mtime fields of tree nodes

This file format modification was previously left incomplete because of
planned upcoming changes. Not all of these changes have been made yet,
but documenting what exists today will help talking more widely about it.

Differential Revision: https://phab.mercurial-scm.org/D11625

# 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