1 # Dummy extension that adds a delay after acquiring a lock.

     2 #

     3 # This extension can be used to test race conditions between lock acquisition.

     4 

     5 from __future__ import absolute_import

     6 

     7 import os

     8 import time

     9 

    10 from mercurial import (

    11     lock as lockmod,

    12 )

    13 

    14 class delaylock(lockmod.lock):

    15     def lock(self):

    16         delay = float(os.environ.get('HGPRELOCKDELAY', '0.0'))

    17         if delay:

    18             time.sleep(delay)

    19         res = super(delaylock, self).lock()

    20         delay = float(os.environ.get('HGPOSTLOCKDELAY', '0.0'))

    21         if delay:

    22             time.sleep(delay)

    23         return res

    24 

    25 def extsetup(ui):

    26     lockmod.lock = delaylock