view mercurial/node.py @ 17235:3745ae495ce5 stable

encoding: use s.decode to trigger UnicodeDecodeError

When calling encode on a str, the string is first decoded using the
default encoding and then encoded. So

  s.encode('ascii') == s.decode().encode('ascii')

We don't care about the encode step here -- we're just after the
UnicodeDecodeError raised by decode if it finds a non-ASCII character.

This way is also marginally faster since it saves the construction of
the extra str object.

# 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 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])