annotate mercurial/unionrepo.py @ 50896:b2b8c25f9462

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author Pierre-Yves David <pierre-yves.david@octobus.net>
date Wed, 30 Aug 2023 13:28:09 +0200
parents 3a2df812e1c7
children 18c8c18993f0
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1 # unionrepo.py - repository class for viewing union of repository changesets
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2 #
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3 # Derived from bundlerepo.py
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4 # Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com>
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5 # Copyright 2013 Unity Technologies, Mads Kiilerich <madski@unity3d.com>
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6 #
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7 # This software may be used and distributed according to the terms of the
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8 # GNU General Public License version 2 or any later version.
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9
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10 """Repository class for "in-memory pull" of one local repository to another,
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11 allowing operations like diff and log with revsets.
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12 """
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13
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14
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15 from .i18n import _
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16 from .pycompat import getattr
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17
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18 from . import (
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19 changelog,
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20 cmdutil,
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21 encoding,
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22 error,
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23 filelog,
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24 localrepo,
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25 manifest,
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26 mdiff,
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27 pathutil,
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28 revlog,
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29 util,
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30 vfs as vfsmod,
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31 )
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32
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33 from .revlogutils import (
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34 constants as revlog_constants,
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35 )
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36
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37
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38 class unionrevlog(revlog.revlog):
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39 def __init__(self, opener, radix, revlog2, linkmapper):
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40 # How it works:
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41 # To retrieve a revision, we just need to know the node id so we can
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42 # look it up in revlog2.
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43 #
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44 # To differentiate a rev in the second revlog from a rev in the revlog,
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45 # we check revision against repotiprev.
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46 opener = vfsmod.readonlyvfs(opener)
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47 target = getattr(revlog2, 'target', None)
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48 if target is None:
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49 # a revlog wrapper, eg: the manifestlog that is not an actual revlog
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50 target = revlog2._revlog.target
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51 revlog.revlog.__init__(self, opener, target=target, radix=radix)
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52 self.revlog2 = revlog2
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53
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54 n = len(self)
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55 self.repotiprev = n - 1
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56 self.bundlerevs = set() # used by 'bundle()' revset expression
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57 for rev2 in self.revlog2:
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58 rev = self.revlog2.index[rev2]
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59 # rev numbers - in revlog2, very different from self.rev
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60 (
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61 _start,
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62 _csize,
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63 rsize,
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64 base,
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65 linkrev,
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66 p1rev,
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67 p2rev,
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68 node,
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69 _sdo,
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70 _sds,
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71 _dcm,
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72 _sdcm,
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73 rank,
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74 ) = rev
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75 flags = _start & 0xFFFF
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76
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77 if linkmapper is None: # link is to same revlog
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78 assert linkrev == rev2 # we never link back
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79 link = n
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80 else: # rev must be mapped from repo2 cl to unified cl by linkmapper
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81 link = linkmapper(linkrev)
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82
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83 if linkmapper is not None: # link is to same revlog
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84 base = linkmapper(base)
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85
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86 this_rev = self.index.get_rev(node)
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87 if this_rev is not None:
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88 # this happens for the common revlog revisions
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89 self.bundlerevs.add(this_rev)
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90 continue
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91
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92 p1node = self.revlog2.node(p1rev)
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93 p2node = self.revlog2.node(p2rev)
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94
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95 # TODO: it's probably wrong to set compressed length to -1, but
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96 # I have no idea if csize is valid in the base revlog context.
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97 e = (
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98 flags,
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99 -1,
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100 rsize,
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101 base,
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102 link,
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103 self.rev(p1node),
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104 self.rev(p2node),
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105 node,
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106 0, # sidedata offset
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107 0, # sidedata size
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108 revlog_constants.COMP_MODE_INLINE,
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109 revlog_constants.COMP_MODE_INLINE,
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110 rank,
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111 )
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112 self.index.append(e)
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113 self.bundlerevs.add(n)
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114 n += 1
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115
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116 def _chunk(self, rev, df=None):
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117 if rev <= self.repotiprev:
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118 return revlog.revlog._chunk(self, rev)
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119 return self.revlog2._chunk(self.node(rev))
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120
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121 def revdiff(self, rev1, rev2):
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122 """return or calculate a delta between two revisions"""
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123 if rev1 > self.repotiprev and rev2 > self.repotiprev:
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124 return self.revlog2.revdiff(
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125 self.revlog2.rev(self.node(rev1)),
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126 self.revlog2.rev(self.node(rev2)),
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127 )
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128 elif rev1 <= self.repotiprev and rev2 <= self.repotiprev:
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a61a8f78da28 unionrepo: use normal inheritance scheme to call revdiff
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parents: 42826
diff changeset
129 return super(unionrevlog, self).revdiff(rev1, rev2)
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130
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diff changeset
131 return mdiff.textdiff(self.rawdata(rev1), self.rawdata(rev2))
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132
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diff changeset
133 def _revisiondata(self, nodeorrev, _df=None, raw=False):
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134 if isinstance(nodeorrev, int):
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diff changeset
135 rev = nodeorrev
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diff changeset
136 node = self.node(rev)
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parents:
diff changeset
137 else:
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diff changeset
138 node = nodeorrev
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parents:
diff changeset
139 rev = self.rev(node)
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diff changeset
140
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parents:
diff changeset
141 if rev > self.repotiprev:
42824
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parents: 42726
diff changeset
142 # work around manifestrevlog NOT being a revlog
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parents: 42726
diff changeset
143 revlog2 = getattr(self.revlog2, '_revlog', self.revlog2)
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parents: 42726
diff changeset
144 func = revlog2._revisiondata
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145 else:
42824
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diff changeset
146 func = super(unionrevlog, self)._revisiondata
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diff changeset
147 return func(node, _df=_df, raw=raw)
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148
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diff changeset
149 def addrevision(
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150 self,
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151 text,
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152 transaction,
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Matt Harbison <matt_harbison@yahoo.com>
parents: 49753
diff changeset
153 link,
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Matt Harbison <matt_harbison@yahoo.com>
parents: 49753
diff changeset
154 p1,
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diff changeset
155 p2,
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156 cachedelta=None,
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parents: 49753
diff changeset
157 node=None,
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parents: 49753
diff changeset
158 flags=revlog.REVIDX_DEFAULT_FLAGS,
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diff changeset
159 deltacomputer=None,
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parents: 49753
diff changeset
160 sidedata=None,
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diff changeset
161 ):
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162 raise NotImplementedError
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163
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diff changeset
164 def addgroup(
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165 self,
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166 deltas,
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167 linkmapper,
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168 transaction,
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Joerg Sonnenberger <joerg@bec.de>
parents: 45815
diff changeset
169 alwayscache=False,
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170 addrevisioncb=None,
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parents: 43565
diff changeset
171 duplicaterevisioncb=None,
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172 debug_info=None,
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173 delta_base_reuse_policy=None,
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174 ):
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175 raise NotImplementedError
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176
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parents: 41038
diff changeset
177 def strip(self, minlink, transaction):
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178 raise NotImplementedError
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179
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180 def checksize(self):
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diff changeset
181 raise NotImplementedError
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182
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183
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diff changeset
184 class unionchangelog(unionrevlog, changelog.changelog):
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185 def __init__(self, opener, opener2):
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diff changeset
186 changelog.changelog.__init__(self, opener)
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187 linkmapper = None
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diff changeset
188 changelog2 = changelog.changelog(opener2)
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parents: 47148
diff changeset
189 unionrevlog.__init__(self, opener, self.radix, changelog2, linkmapper)
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diff changeset
190
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diff changeset
191
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Durham Goode <durham@fb.com>
parents: 30218
diff changeset
192 class unionmanifest(unionrevlog, manifest.manifestrevlog):
46780
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193 def __init__(self, nodeconstants, opener, opener2, linkmapper):
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parents: 46373
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194 manifest.manifestrevlog.__init__(self, nodeconstants, opener)
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195 manifest2 = manifest.manifestrevlog(nodeconstants, opener2)
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diff changeset
196 unionrevlog.__init__(
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parents: 47148
diff changeset
197 self, opener, self._revlog.radix, manifest2, linkmapper
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198 )
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199
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200
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parents: 34219
diff changeset
201 class unionfilelog(filelog.filelog):
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parents:
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202 def __init__(self, opener, path, opener2, linkmapper, repo):
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parents:
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203 filelog.filelog.__init__(self, opener, path)
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diff changeset
204 filelog2 = filelog.filelog(opener2, path)
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diff changeset
205 self._revlog = unionrevlog(
47150
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parents: 47148
diff changeset
206 opener, self._revlog.radix, filelog2._revlog, linkmapper
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207 )
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diff changeset
208 self._repo = repo
37497
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parents: 34219
diff changeset
209 self.repotiprev = self._revlog.repotiprev
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parents: 34219
diff changeset
210 self.revlog2 = self._revlog.revlog2
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diff changeset
211
24118
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Mike Edgar <adgar@google.com>
parents: 24003
diff changeset
212 def iscensored(self, rev):
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Mike Edgar <adgar@google.com>
parents: 24003
diff changeset
213 """Check if a revision is censored."""
76f6ae06ddf5 revlog: add "iscensored()" to revlog public API
Mike Edgar <adgar@google.com>
parents: 24003
diff changeset
214 if rev <= self.repotiprev:
76f6ae06ddf5 revlog: add "iscensored()" to revlog public API
Mike Edgar <adgar@google.com>
parents: 24003
diff changeset
215 return filelog.filelog.iscensored(self, rev)
27723
bf86e3e87123 unionrepo: fix wrong rev being checked in iscensored (issue5024)
Sean Farley <sean@farley.io>
parents: 26587
diff changeset
216 node = self.node(rev)
bf86e3e87123 unionrepo: fix wrong rev being checked in iscensored (issue5024)
Sean Farley <sean@farley.io>
parents: 26587
diff changeset
217 return self.revlog2.iscensored(self.revlog2.rev(node))
24118
76f6ae06ddf5 revlog: add "iscensored()" to revlog public API
Mike Edgar <adgar@google.com>
parents: 24003
diff changeset
218
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219
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diff changeset
220 class unionpeer(localrepo.localpeer):
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parents:
diff changeset
221 def canpush(self):
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parents:
diff changeset
222 return False
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parents:
diff changeset
223
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224
48946
642e31cb55f0 py3: use class X: instead of class X(object):
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parents: 48875
diff changeset
225 class unionrepository:
39605
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parents: 39549
diff changeset
226 """Represents the union of data in 2 repositories.
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227
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parents: 39549
diff changeset
228 Instances are not usable if constructed directly. Use ``instance()``
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diff changeset
229 or ``makeunionrepository()`` to create a usable instance.
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parents: 39549
diff changeset
230 """
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231
39605
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232 def __init__(self, repo2, url):
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233 self.repo2 = repo2
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parents: 39549
diff changeset
234 self._url = url
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diff changeset
235
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diff changeset
236 self.ui.setconfig(b'phases', b'publish', False, b'unionrepo')
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237
a9c443b3b240 unionrepo: read-only operations on a union of two localrepos
Mads Kiilerich <madski@unity3d.com>
parents:
diff changeset
238 @localrepo.unfilteredpropertycache
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parents:
diff changeset
239 def changelog(self):
23878
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Angel Ezquerra <angel.ezquerra@gmail.com>
parents: 20790
diff changeset
240 return unionchangelog(self.svfs, self.repo2.svfs)
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parents:
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241
39763
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 39605
diff changeset
242 @localrepo.unfilteredpropertycache
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diff changeset
243 def manifestlog(self):
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diff changeset
244 rootstore = unionmanifest(
46780
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parents: 46373
diff changeset
245 self.nodeconstants,
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parents: 46373
diff changeset
246 self.svfs,
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parents: 46373
diff changeset
247 self.repo2.svfs,
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parents: 46373
diff changeset
248 self.unfiltered()._clrev,
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249 )
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250 return manifest.manifestlog(
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diff changeset
251 self.svfs, self, rootstore, self.narrowmatch()
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diff changeset
252 )
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diff changeset
253
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diff changeset
254 def _clrev(self, rev2):
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parents:
diff changeset
255 """map from repo2 changelog rev to temporary rev in self.changelog"""
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parents:
diff changeset
256 node = self.repo2.changelog.node(rev2)
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parents:
diff changeset
257 return self.changelog.rev(node)
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parents:
diff changeset
258
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parents:
diff changeset
259 def url(self):
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parents:
diff changeset
260 return self._url
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parents:
diff changeset
261
a9c443b3b240 unionrepo: read-only operations on a union of two localrepos
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parents:
diff changeset
262 def file(self, f):
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263 return unionfilelog(
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264 self.svfs, f, self.repo2.svfs, self.unfiltered()._clrev, self
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265 )
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266
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267 def close(self):
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268 self.repo2.close()
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269
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270 def cancopy(self):
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271 return False
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272
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273 def peer(self, path=None, remotehidden=False):
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274 return unionpeer(self, path=None, remotehidden=remotehidden)
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275
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276 def getcwd(self):
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277 return encoding.getcwd() # always outside the repo
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278
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279
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280 def instance(ui, path, create, intents=None, createopts=None):
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281 if create:
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282 raise error.Abort(_(b'cannot create new union repository'))
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283 parentpath = ui.config(b"bundle", b"mainreporoot")
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284 if not parentpath:
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285 # try to find the correct path to the working directory repo
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286 parentpath = cmdutil.findrepo(encoding.getcwd())
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287 if parentpath is None:
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288 parentpath = b''
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289 if parentpath:
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290 # Try to make the full path relative so we get a nice, short URL.
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291 # In particular, we don't want temp dir names in test outputs.
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292 cwd = encoding.getcwd()
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293 if parentpath == cwd:
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294 parentpath = b''
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295 else:
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296 cwd = pathutil.normasprefix(cwd)
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297 if parentpath.startswith(cwd):
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298 parentpath = parentpath[len(cwd) :]
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299 if path.startswith(b'union:'):
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300 s = path.split(b":", 1)[1].split(b"+", 1)
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301 if len(s) == 1:
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302 repopath, repopath2 = parentpath, s[0]
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303 else:
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304 repopath, repopath2 = s
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305 else:
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306 repopath, repopath2 = parentpath, path
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307
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308 return makeunionrepository(ui, repopath, repopath2)
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309
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310
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311 def makeunionrepository(ui, repopath1, repopath2):
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312 """Make a union repository object from 2 local repo paths."""
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313 repo1 = localrepo.instance(ui, repopath1, create=False)
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314 repo2 = localrepo.instance(ui, repopath2, create=False)
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315
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316 url = b'union:%s+%s' % (
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317 util.expandpath(repopath1),
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318 util.expandpath(repopath2),
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319 )
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320
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321 class derivedunionrepository(unionrepository, repo1.__class__):
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322 pass
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323
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324 repo = repo1
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325 repo.__class__ = derivedunionrepository
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326 unionrepository.__init__(repo1, repo2, url)
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327
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328 return repo