ext-sidedata.py
84 lines
| 2.7 KiB
| text/x-python
|
PythonLexer
r43308 | # 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, | ||||
r43310 | node, | |||
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r45933 | requirements, | ||
r43308 | revlog, | |||
) | ||||
r46661 | from mercurial.upgrade_utils import engine as upgrade_engine | |||
|
r43346 | from mercurial.revlogutils import sidedata | ||
r43308 | ||||
|
r43346 | def wrapaddrevision( | ||
orig, self, text, transaction, link, p1, p2, *args, **kwargs | ||||
): | ||||
r43308 | 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) | ||||
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r43346 | |||
r43310 | def wraprevision(orig, self, nodeorrev, *args, **kwargs): | |||
text = orig(self, nodeorrev, *args, **kwargs) | ||||
r43404 | if getattr(self, 'sidedatanocheck', False): | |||
return text | ||||
r43310 | 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 | ||||
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r43346 | |||
r43404 | def wrapgetsidedatacompanion(orig, srcrepo, dstrepo): | |||
sidedatacompanion = orig(srcrepo, dstrepo) | ||||
addedreqs = dstrepo.requirements - srcrepo.requirements | ||||
|
r45933 | if requirements.SIDEDATA_REQUIREMENT in addedreqs: | ||
r43404 | 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) | ||||
r46327 | return False, (), update, 0, 0 | |||
r43404 | ||||
return sidedatacompanion | ||||
r43308 | def extsetup(ui): | |||
extensions.wrapfunction(revlog.revlog, 'addrevision', wrapaddrevision) | ||||
r43310 | extensions.wrapfunction(revlog.revlog, 'revision', wraprevision) | |||
r43404 | extensions.wrapfunction( | |||
r46661 | upgrade_engine, 'getsidedatacompanion', wrapgetsidedatacompanion | |||
r43404 | ) | |||