mercurial/cacheutil.py

engine: refactor code to replace stores in separate function

In not all upgrades, we need to change the whole store. For example, when
upgrading repository to share-safe mode, we don't touch revlogs at all hence
store cloning and copying is not required.

The store replacing code needs to be made aware about what all has changed and
hence only copy/rename those things. To kickstart that, this patch moves
existing logic into a separate function.

Differential Revision: https://phab.mercurial-scm.org/D9674

# scmutil.py - Mercurial core utility functions
#
#  Copyright Matt Mackall <[e-mail]> and other
#
# 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

from . import repoview


def cachetocopy(srcrepo):
    """return the list of cache file valuable to copy during a clone"""
    # In local clones we're copying all nodes, not just served
    # ones. Therefore copy all branch caches over.
    cachefiles = [b'branch2']
    cachefiles += [b'branch2-%s' % f for f in repoview.filtertable]
    cachefiles += [b'rbc-names-v1', b'rbc-revs-v1']
    cachefiles += [b'tags2']
    cachefiles += [b'tags2-%s' % f for f in repoview.filtertable]
    cachefiles += [b'hgtagsfnodes1']
    return cachefiles