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annotate tests/testlib/ext-sidedata.py @ 47235:8505d23928b1

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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
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Mon, 03 May 2021 12:29:30 +0200
parents 84b176ad2860
children 9d9eb22b9b69
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1 # ext-sidedata.py - small extension to test the sidedata logic
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2 #
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3 # Copyright 2019 Pierre-Yves David <pierre-yves.david@octobus.net>
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 import hashlib
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11 import struct
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12
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13 from mercurial.node import nullrev
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14 from mercurial import (
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15 extensions,
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16 requirements,
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17 revlog,
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18 )
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19
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20 from mercurial.upgrade_utils import engine as upgrade_engine
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21
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22 from mercurial.revlogutils import constants
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23 from mercurial.revlogutils import sidedata
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24
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25
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26 def wrapaddrevision(
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27 orig, self, text, transaction, link, p1, p2, *args, **kwargs
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28 ):
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29 if kwargs.get('sidedata') is None:
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30 kwargs['sidedata'] = {}
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31 sd = kwargs['sidedata']
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32 ## let's store some arbitrary data just for testing
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33 # text length
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34 sd[sidedata.SD_TEST1] = struct.pack('>I', len(text))
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35 # and sha2 hashes
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36 sha256 = hashlib.sha256(text).digest()
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37 sd[sidedata.SD_TEST2] = struct.pack('>32s', sha256)
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38 return orig(self, text, transaction, link, p1, p2, *args, **kwargs)
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39
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40
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41 def wrap_revisiondata(orig, self, nodeorrev, *args, **kwargs):
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42 text, sd = orig(self, nodeorrev, *args, **kwargs)
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43 if getattr(self, 'sidedatanocheck', False):
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44 return text, sd
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45 if self.hassidedata:
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46 return text, sd
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47 if nodeorrev != nullrev and nodeorrev != self.nullid:
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48 cat1 = sd.get(sidedata.SD_TEST1)
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49 if cat1 is not None and len(text) != struct.unpack('>I', cat1)[0]:
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50 raise RuntimeError('text size mismatch')
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51 expected = sd.get(sidedata.SD_TEST2)
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52 got = hashlib.sha256(text).digest()
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53 if expected is not None and got != expected:
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54 raise RuntimeError('sha256 mismatch')
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55 return text, sd
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56
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57
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58 def wrapget_sidedata_helpers(orig, srcrepo, dstrepo):
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59 repo, computers, removers = orig(srcrepo, dstrepo)
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60 assert not computers and not removers # deal with composition later
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61 addedreqs = dstrepo.requirements - srcrepo.requirements
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62
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63 if requirements.REVLOGV2_REQUIREMENT in addedreqs:
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64
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65 def computer(repo, revlog, rev, old_sidedata):
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66 assert not old_sidedata # not supported yet
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67 update = {}
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68 revlog.sidedatanocheck = True
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69 try:
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70 text = revlog.revision(rev)
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71 finally:
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72 del revlog.sidedatanocheck
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73 ## let's store some arbitrary data just for testing
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74 # text length
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75 update[sidedata.SD_TEST1] = struct.pack('>I', len(text))
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76 # and sha2 hashes
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77 sha256 = hashlib.sha256(text).digest()
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78 update[sidedata.SD_TEST2] = struct.pack('>32s', sha256)
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79 return update, (0, 0)
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80
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81 srcrepo.register_sidedata_computer(
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82 constants.KIND_CHANGELOG,
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83 b"whatever",
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84 (sidedata.SD_TEST1, sidedata.SD_TEST2),
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85 computer,
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86 0,
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87 )
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88 dstrepo.register_wanted_sidedata(b"whatever")
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89
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90 return sidedata.get_sidedata_helpers(srcrepo, dstrepo._wanted_sidedata)
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91
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92
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93 def extsetup(ui):
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94 extensions.wrapfunction(revlog.revlog, 'addrevision', wrapaddrevision)
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95 extensions.wrapfunction(revlog.revlog, '_revisiondata', wrap_revisiondata)
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96 extensions.wrapfunction(
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97 upgrade_engine, 'get_sidedata_helpers', wrapget_sidedata_helpers
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98 )
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99
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100
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101 def reposetup(ui, repo):
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102 # We don't register sidedata computers because we don't care within these
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103 # tests
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104 repo.register_wanted_sidedata(sidedata.SD_TEST1)
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105 repo.register_wanted_sidedata(sidedata.SD_TEST2)