Allow callers to pass in the dirstate lock in most localrepo.py funcs.
This makes it possible to take the lock once and commit a large number of
patches, without having to read and write the dirstate for each patch.
# repo.py - repository base classes 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.
class RepoError(Exception): pass