Mercurial > hg
view tests/testlib/ext-sidedata.py @ 50706:0452af304808
stream-clone: add a v3 version of the protocol
This new version is less rigid regarding the extract number of files and number
of bytes to be actually transfered, it also lays the groundwork for other
improvements.
The format stays experimental, but this is an interesting base to build upon.
author | Arseniy Alekseyev <aalekseyev@janestreet.com> |
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date | Thu, 01 Jun 2023 17:39:22 +0100 |
parents | 6000f5b25c9b |
children | 7c2dc75cdc0f |
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# 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. 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 = orig(self, nodeorrev, *args, **kwargs) sd = self.sidedata(nodeorrev) if getattr(self, 'sidedatanocheck', False): return text if self.hassidedata: return text 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 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)