sidedata: use revlogv2 requirement in the test helper
We are about to drop the requirement dedicated to sidedata (since revlogv2 will
support them unconditionally and previous version will not.).
To prepare this more we adapt the test code to not use that requirements.
Differential Revision: https://phab.mercurial-scm.org/D10615
# 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.node import nullrev
from mercurial import (
extensions,
requirements,
revlog,
)
from mercurial.upgrade_utils import engine as upgrade_engine
from mercurial.revlogutils import constants
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 wrap_revisiondata(orig, self, nodeorrev, *args, **kwargs):
text, sd = orig(self, nodeorrev, *args, **kwargs)
if getattr(self, 'sidedatanocheck', False):
return text, sd
if self.hassidedata:
return text, sd
if nodeorrev != nullrev and nodeorrev != self.nullid:
cat1 = sd.get(sidedata.SD_TEST1)
if cat1 is not None and len(text) != struct.unpack('>I', cat1)[0]:
raise RuntimeError('text size mismatch')
expected = sd.get(sidedata.SD_TEST2)
got = hashlib.sha256(text).digest()
if expected is not None and got != expected:
raise RuntimeError('sha256 mismatch')
return text, sd
def wrapget_sidedata_helpers(orig, srcrepo, dstrepo):
repo, computers, removers = orig(srcrepo, dstrepo)
assert not computers and not removers # deal with composition later
addedreqs = dstrepo.requirements - srcrepo.requirements
if requirements.REVLOGV2_REQUIREMENT in addedreqs:
def computer(repo, revlog, rev, old_sidedata):
assert not old_sidedata # not supported yet
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 update, (0, 0)
srcrepo.register_sidedata_computer(
constants.KIND_CHANGELOG,
b"whatever",
(sidedata.SD_TEST1, sidedata.SD_TEST2),
computer,
0,
)
dstrepo.register_wanted_sidedata(b"whatever")
return sidedata.get_sidedata_helpers(srcrepo, dstrepo._wanted_sidedata)
def extsetup(ui):
extensions.wrapfunction(revlog.revlog, 'addrevision', wrapaddrevision)
extensions.wrapfunction(revlog.revlog, '_revisiondata', wrap_revisiondata)
extensions.wrapfunction(
upgrade_engine, 'get_sidedata_helpers', wrapget_sidedata_helpers
)
def reposetup(ui, repo):
# We don't register sidedata computers because we don't care within these
# tests
repo.register_wanted_sidedata(sidedata.SD_TEST1)
repo.register_wanted_sidedata(sidedata.SD_TEST2)