tests/revlog-formatv0.py

censor: make censor acquire locks before processing

Before this patch, "hg censor" executes below:

  - without acquisition of wlock, examine whether the working
    directory refers the revision of the file to be censored or not

  - without acquisition of store lock (slock), replace existing
    filelog of file to be censored with censored one,

    Replacement consists of steps below, and it is assumed that the
    destination filelog at (1) isn't changed before renaming at (3).

    1. read existing filelog in
    2. write filelog entries (both censored and not) into temporary file
    3. rename from temporary file to existing filelog to be censored

It may cause unintentional result, if another command runs parallelly
(see also issue4368).

This patch makes "hg censor" acquire wlock and slock before
processing.

#!/usr/bin/env python
# Copyright 2010 Intevation GmbH
# Author(s):
# Thomas Arendsen Hein <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

"""Create a Mercurial repository in revlog format 0

changeset:   0:a1ef0b125355
tag:         tip
user:        user
date:        Thu Jan 01 00:00:00 1970 +0000
files:       empty
description:
empty file
"""

import os, sys

files = [
    ('formatv0/.hg/00changelog.i',
     '000000000000004400000000000000000000000000000000000000'
     '000000000000000000000000000000000000000000000000000000'
     '0000a1ef0b125355d27765928be600cfe85784284ab3'),
    ('formatv0/.hg/00changelog.d',
     '756163613935613961356635353036303562366138343738336237'
     '61623536363738616436356635380a757365720a3020300a656d70'
     '74790a0a656d7074792066696c65'),
    ('formatv0/.hg/00manifest.i',
     '000000000000003000000000000000000000000000000000000000'
     '000000000000000000000000000000000000000000000000000000'
     '0000aca95a9a5f550605b6a84783b7ab56678ad65f58'),
    ('formatv0/.hg/00manifest.d',
     '75656d707479006238306465356431333837353835343163356630'
     '35323635616431343461623966613836643164620a'),
    ('formatv0/.hg/data/empty.i',
     '000000000000000000000000000000000000000000000000000000'
     '000000000000000000000000000000000000000000000000000000'
     '0000b80de5d138758541c5f05265ad144ab9fa86d1db'),
    ('formatv0/.hg/data/empty.d',
     ''),
]

def makedirs(name):
    """recursive directory creation"""
    parent = os.path.dirname(name)
    if parent:
        makedirs(parent)
    os.mkdir(name)

makedirs(os.path.join(*'formatv0/.hg/data'.split('/')))

for name, data in files:
    f = open(name, 'wb')
    f.write(data.decode('hex'))
    f.close()

sys.exit(0)