fix backtrace printed when cannot get lock.
change lock error handling code so exceptions have useful info and
exception handling in one place.
add test case for when cannot get lock.
"""
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])