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view mercurial/node.py @ 16838:d37d221334be

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revset: cache alias expansions Caching has no performance effect on the revset aliases which triggered the recent recursive evaluation bug. I wrote it not to feel bad about expanding several times the same complicated expression.
author Patrick Mezard <patrick@mezard.eu>
date Thu, 24 May 2012 13:05:06 +0200
parents 25e572394f5c
children 1a5211f2f87f
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# 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.

import binascii

nullrev = -1
nullid = "\0" * 20

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

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