mercurial/node.py

ignore: separate pattern extraction from match compilation

hgignore files have slightly different syntax from match objects,
e.g. syntax: foo headers, regexp: forms, and re being relre. Put
conversion from hgignore syntax into match syntax into a standalone
function so that it is easier to validate hgignore hunks externally.

# node.py - basic nodeid manipulation for mercurial
#
# Copyright 2005, 2006 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.

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])