documentation: add some internals documentation about bid merge
This is an important algorithm that was only documented on the wiki so far.
Some update to the algorithm (and associated doc) is to expected in the future
since the bid merge algorithm is bug-ridden when it comes to file deletion comes
to play.
Differential Revision: https://phab.mercurial-scm.org/D8711
#!/usr/bin/env python
# Copyright 2010 Intevation GmbH
# Author(s):
# Thomas Arendsen Hein <thomas@intevation.de>
#
# 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
"""
from __future__ import absolute_import
import binascii
import os
import sys
files = [
(
b'formatv0/.hg/00changelog.i',
b'000000000000004400000000000000000000000000000000000000'
b'000000000000000000000000000000000000000000000000000000'
b'0000a1ef0b125355d27765928be600cfe85784284ab3',
),
(
b'formatv0/.hg/00changelog.d',
b'756163613935613961356635353036303562366138343738336237'
b'61623536363738616436356635380a757365720a3020300a656d70'
b'74790a0a656d7074792066696c65',
),
(
b'formatv0/.hg/00manifest.i',
b'000000000000003000000000000000000000000000000000000000'
b'000000000000000000000000000000000000000000000000000000'
b'0000aca95a9a5f550605b6a84783b7ab56678ad65f58',
),
(
b'formatv0/.hg/00manifest.d',
b'75656d707479006238306465356431333837353835343163356630'
b'35323635616431343461623966613836643164620a',
),
(
b'formatv0/.hg/data/empty.i',
b'000000000000000000000000000000000000000000000000000000'
b'000000000000000000000000000000000000000000000000000000'
b'0000b80de5d138758541c5f05265ad144ab9fa86d1db',
),
(b'formatv0/.hg/data/empty.d', b''),
]
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(binascii.unhexlify(data))
f.close()
sys.exit(0)