upgrade: split actual upgrade code away from the main module
The main module is getting big and hard to follow. So we are splitting all the
logic to actually run an upgrade in a sub module. It nicely highlight that there
are very few actual call point to the code we just moved.
Differential Revision: https://phab.mercurial-scm.org/D9476
# ext-sidedata.py - small extension to test the sidedata logic
#
# Copyright 2019 Pierre-Yves David <pierre-yves.david@octobus.net)
#
# 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
import hashlib
import struct
from mercurial import (
extensions,
node,
requirements,
revlog,
)
from mercurial.upgrade_utils import engine as upgrade_engine
from mercurial.revlogutils import sidedata
def wrapaddrevision(
orig, self, text, transaction, link, p1, p2, *args, **kwargs
):
if kwargs.get('sidedata') is None:
kwargs['sidedata'] = {}
sd = kwargs['sidedata']
## let's store some arbitrary data just for testing
# text length
sd[sidedata.SD_TEST1] = struct.pack('>I', len(text))
# and sha2 hashes
sha256 = hashlib.sha256(text).digest()
sd[sidedata.SD_TEST2] = struct.pack('>32s', sha256)
return orig(self, text, transaction, link, p1, p2, *args, **kwargs)
def wraprevision(orig, self, nodeorrev, *args, **kwargs):
text = orig(self, nodeorrev, *args, **kwargs)
if getattr(self, 'sidedatanocheck', False):
return text
if nodeorrev != node.nullrev and nodeorrev != node.nullid:
sd = self.sidedata(nodeorrev)
if len(text) != struct.unpack('>I', sd[sidedata.SD_TEST1])[0]:
raise RuntimeError('text size mismatch')
expected = sd[sidedata.SD_TEST2]
got = hashlib.sha256(text).digest()
if got != expected:
raise RuntimeError('sha256 mismatch')
return text
def wrapgetsidedatacompanion(orig, srcrepo, dstrepo):
sidedatacompanion = orig(srcrepo, dstrepo)
addedreqs = dstrepo.requirements - srcrepo.requirements
if requirements.SIDEDATA_REQUIREMENT in addedreqs:
assert sidedatacompanion is None # deal with composition later
def sidedatacompanion(revlog, rev):
update = {}
revlog.sidedatanocheck = True
try:
text = revlog.revision(rev)
finally:
del revlog.sidedatanocheck
## let's store some arbitrary data just for testing
# text length
update[sidedata.SD_TEST1] = struct.pack('>I', len(text))
# and sha2 hashes
sha256 = hashlib.sha256(text).digest()
update[sidedata.SD_TEST2] = struct.pack('>32s', sha256)
return False, (), update, 0, 0
return sidedatacompanion
def extsetup(ui):
extensions.wrapfunction(revlog.revlog, 'addrevision', wrapaddrevision)
extensions.wrapfunction(revlog.revlog, 'revision', wraprevision)
extensions.wrapfunction(
upgrade_engine, 'getsidedatacompanion', wrapgetsidedatacompanion
)