add -f/--force to pull, incoming, outgoing, to work on unrelated repo. before this, push would not push from e.g. "hg" repo to "kernel" repo but other commands worked. this was bad idea, could merge unrelated projects by accident. i did this tonight. now, all commands still work with unrelated repo but need --force/-f. abort is default. this is safer.

# 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