mercurial/node.py
author Yuya Nishihara <yuya@tcha.org>
Tue, 05 Dec 2017 21:50:33 +0900
changeset 40931 c752fbe228fb5fb5338b4b90efcfed7c2046ef7b
parent 37907 af854b1b36f8e24e17f0b1d1f4873abc0c95fd7d
child 42714 f574cc00831a8725f6e6a87c23226661a8aa7ca3
permissions -rw-r--r--
repoview: extract a factory function of proxy class This makes sure that dynamically-created class objects are isolated from local binding of repo instances. The type cache is moved to module level as it isn't tied to each instance.

# node.py - basic nodeid manipulation for mercurial
#
# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

import binascii

# This ugly style has a noticeable effect in manifest parsing
hex = binascii.hexlify
bin = binascii.unhexlify

nullrev = -1
nullid = b"\0" * 20
nullhex = hex(nullid)

# Phony node value to stand-in for new files in some uses of
# manifests.
newnodeid = '!' * 20
addednodeid = ('0' * 15) + 'added'
modifiednodeid = ('0' * 12) + 'modified'

wdirnodes = {newnodeid, addednodeid, modifiednodeid}

# pseudo identifiers for working directory
# (they are experimental, so don't add too many dependencies on them)
wdirrev = 0x7fffffff
wdirid = b"\xff" * 20
wdirhex = hex(wdirid)

def short(node):
    return hex(node[:6])