sidedatacopies: add a new requirement for storing copies into sidedata
The end goal is to have changesets centric sidedata information stored into
changelog sidedata. This make it possible to use the changeset based copy
tracing algorithm on any repository without affecting hashes.
The actual implementation is coming. The feature is marked as experimental
(do not use in production) until we stabilise details about the format.
Differential Revision: https://phab.mercurial-scm.org/D6945
# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)