copies-rust: use matching to select the final copies information
This is a bit more idiomatic and this prepare a future refactoring where
InternalCopies from both parent would be updated at the same time.
Differential Revision: https://phab.mercurial-scm.org/D9647
# Copyright 2016-present Facebook. All Rights Reserved.
#
# error: errors used in fastannotate
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
class CorruptedFileError(Exception):
pass
class CannotReuseError(Exception):
"""cannot reuse or update the cache incrementally"""