rewrite demandload module to be more flexible. performance not affected. old demandload module could only import top-level modules like os and sys. with rewrite, all of following syntax is emulated perfectly: import foo, bar foo bar import foo.bar.quux foo.bar.quux from foo.bar import quux, blurfl foo.bar:quux,blurfl only thing missing is "import foo as bar". also, namespace clashes between placeholder object and demand loaded module are no longer possible.

"""
node.py - basic nodeid manipulation for mercurial

Copyright 2005 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

nullid = "\0" * 20

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

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

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