convert extension: Add support for username mapping Allows mapping usernames to new ones during conversion process. - Use -A option for first import - Then at the end of the conversion process and if the destination repo supports authorfile attribute, author map content is copied to the file pointed by the authorfile call. - On incremental conversions w/o any -A option specified, the destination authorfile, if any, gets read automatically. EG: This allows mapping unix system usernames used in CVS accounts to a more typical "Firstname Lastname <address@server.org>" pair.

"""
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, incorporated herein by reference.
"""

import binascii

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

def hex(node):
    return binascii.hexlify(node)

def bin(node):
    return binascii.unhexlify(node)

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