compat: import the module dagutil module in evolve
Discovery code is core have been rewritten to no longer depends on dagutil and
the module have been removed.
This break evolve's obsmarker discovery (older version of the discovery use the
same concept).. A quick work around is to import the dagutil module in evolve
and use that for now.
This software was downloaded from
https://www.mercurial-scm.org/repo/evolve/
Copyright 2011 Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
Logilab SA <contact@logilab.fr>
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
Patrick Mezard <patrick@mezard.eu>
This software may be used and distributed according to the terms of the GNU
General Public License version 2 or any later version.
On Debian systems, the complete text of the GNU General Public License version
2 can be found in `/usr/share/common-licenses/GPL-2'.