Mercurial > public > mercurial-scm > hg-stable

annotate mercurial/unionrepo.py @ 47157:47ffc754989a

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revlog: always "append" full size tuple Same reasoning as the previous patch. Differential Revision: https://phab.mercurial-scm.org/D10569
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Mon, 03 May 2021 12:21:25 +0200
parents 4292bed8da7c
children bc7d465ea11e
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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 from __future__ import absolute_import
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15
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16 from .i18n import _
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17 from .pycompat import getattr
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18
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19 from . import (
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20 changelog,
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21 cmdutil,
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22 encoding,
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23 error,
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24 filelog,
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25 localrepo,
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26 manifest,
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27 mdiff,
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28 pathutil,
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29 revlog,
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30 util,
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31 vfs as vfsmod,
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32 )
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33
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34
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35 class unionrevlog(revlog.revlog):
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36 def __init__(self, opener, indexfile, revlog2, linkmapper):
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37 # How it works:
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38 # To retrieve a revision, we just need to know the node id so we can
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39 # look it up in revlog2.
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40 #
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41 # To differentiate a rev in the second revlog from a rev in the revlog,
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42 # we check revision against repotiprev.
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43 opener = vfsmod.readonlyvfs(opener)
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44 target = getattr(revlog2, 'target', None)
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45 if target is None:
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46 # a revlog wrapper, eg: the manifestlog that is not an actual revlog
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47 target = revlog2._revlog.target
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48 revlog.revlog.__init__(self, opener, target=target, indexfile=indexfile)
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49 self.revlog2 = revlog2
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50
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51 n = len(self)
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52 self.repotiprev = n - 1
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53 self.bundlerevs = set() # used by 'bundle()' revset expression
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54 for rev2 in self.revlog2:
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55 rev = self.revlog2.index[rev2]
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56 # rev numbers - in revlog2, very different from self.rev
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57 (
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58 _start,
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59 _csize,
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60 rsize,
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61 base,
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62 linkrev,
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63 p1rev,
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64 p2rev,
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65 node,
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66 _sdo,
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67 _sds,
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68 ) = rev
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69 flags = _start & 0xFFFF
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70
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71 if linkmapper is None: # link is to same revlog
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72 assert linkrev == rev2 # we never link back
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73 link = n
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74 else: # rev must be mapped from repo2 cl to unified cl by linkmapper
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75 link = linkmapper(linkrev)
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76
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77 if linkmapper is not None: # link is to same revlog
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78 base = linkmapper(base)
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79
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80 this_rev = self.index.get_rev(node)
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81 if this_rev is not None:
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82 # this happens for the common revlog revisions
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83 self.bundlerevs.add(this_rev)
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84 continue
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85
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86 p1node = self.revlog2.node(p1rev)
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87 p2node = self.revlog2.node(p2rev)
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88
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89 # TODO: it's probably wrong to set compressed length to -1, but
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90 # I have no idea if csize is valid in the base revlog context.
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91 e = (
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92 flags,
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93 -1,
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94 rsize,
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95 base,
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96 link,
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97 self.rev(p1node),
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98 self.rev(p2node),
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99 node,
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100 0, # sidedata offset
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101 0, # sidedata size
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102 )
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103 self.index.append(e)
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104 self.bundlerevs.add(n)
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105 n += 1
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106
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107 def _chunk(self, rev):
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108 if rev <= self.repotiprev:
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109 return revlog.revlog._chunk(self, rev)
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110 return self.revlog2._chunk(self.node(rev))
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111
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112 def revdiff(self, rev1, rev2):
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113 """return or calculate a delta between two revisions"""
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114 if rev1 > self.repotiprev and rev2 > self.repotiprev:
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115 return self.revlog2.revdiff(
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116 self.revlog2.rev(self.node(rev1)),
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117 self.revlog2.rev(self.node(rev2)),
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118 )
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119 elif rev1 <= self.repotiprev and rev2 <= self.repotiprev:
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120 return super(unionrevlog, self).revdiff(rev1, rev2)
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121
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122 return mdiff.textdiff(self.rawdata(rev1), self.rawdata(rev2))
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123
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124 def _revisiondata(self, nodeorrev, _df=None, raw=False):
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125 if isinstance(nodeorrev, int):
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126 rev = nodeorrev
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127 node = self.node(rev)
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128 else:
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129 node = nodeorrev
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130 rev = self.rev(node)
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131
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132 if rev > self.repotiprev:
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133 # work around manifestrevlog NOT being a revlog
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diff changeset
134 revlog2 = getattr(self.revlog2, '_revlog', self.revlog2)
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135 func = revlog2._revisiondata
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136 else:
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diff changeset
137 func = super(unionrevlog, self)._revisiondata
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diff changeset
138 return func(node, _df=_df, raw=raw)
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139
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140 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None):
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141 raise NotImplementedError
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142
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143 def addgroup(
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144 self,
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145 deltas,
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146 linkmapper,
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147 transaction,
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148 alwayscache=False,
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149 addrevisioncb=None,
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150 duplicaterevisioncb=None,
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151 maybemissingparents=False,
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152 ):
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153 raise NotImplementedError
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154
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155 def strip(self, minlink, transaction):
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156 raise NotImplementedError
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157
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158 def checksize(self):
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159 raise NotImplementedError
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160
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161
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162 class unionchangelog(unionrevlog, changelog.changelog):
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163 def __init__(self, opener, opener2):
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164 changelog.changelog.__init__(self, opener)
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165 linkmapper = None
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166 changelog2 = changelog.changelog(opener2)
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167 unionrevlog.__init__(
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168 self, opener, self.indexfile, changelog2, linkmapper
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169 )
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170
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171
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Durham Goode <durham@fb.com>
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172 class unionmanifest(unionrevlog, manifest.manifestrevlog):
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173 def __init__(self, nodeconstants, opener, opener2, linkmapper):
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174 manifest.manifestrevlog.__init__(self, nodeconstants, opener)
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175 manifest2 = manifest.manifestrevlog(nodeconstants, opener2)
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176 unionrevlog.__init__(
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177 self, opener, self.indexfile, manifest2, linkmapper
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178 )
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179
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180
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181 class unionfilelog(filelog.filelog):
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182 def __init__(self, opener, path, opener2, linkmapper, repo):
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183 filelog.filelog.__init__(self, opener, path)
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184 filelog2 = filelog.filelog(opener2, path)
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185 self._revlog = unionrevlog(
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186 opener, self.indexfile, filelog2._revlog, linkmapper
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187 )
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188 self._repo = repo
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189 self.repotiprev = self._revlog.repotiprev
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190 self.revlog2 = self._revlog.revlog2
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191
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192 def iscensored(self, rev):
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193 """Check if a revision is censored."""
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parents: 24003
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194 if rev <= self.repotiprev:
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195 return filelog.filelog.iscensored(self, rev)
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Sean Farley <sean@farley.io>
parents: 26587
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196 node = self.node(rev)
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Sean Farley <sean@farley.io>
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diff changeset
197 return self.revlog2.iscensored(self.revlog2.rev(node))
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198
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199
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200 class unionpeer(localrepo.localpeer):
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201 def canpush(self):
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202 return False
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203
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204
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205 class unionrepository(object):
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206 """Represents the union of data in 2 repositories.
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207
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208 Instances are not usable if constructed directly. Use ``instance()``
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209 or ``makeunionrepository()`` to create a usable instance.
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210 """
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211
39621
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212 def __init__(self, repo2, url):
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213 self.repo2 = repo2
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214 self._url = url
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215
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216 self.ui.setconfig(b'phases', b'publish', False, b'unionrepo')
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217
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diff changeset
218 @localrepo.unfilteredpropertycache
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219 def changelog(self):
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Angel Ezquerra <angel.ezquerra@gmail.com>
parents: 20790
diff changeset
220 return unionchangelog(self.svfs, self.repo2.svfs)
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221
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Gregory Szorc <gregory.szorc@gmail.com>
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diff changeset
222 @localrepo.unfilteredpropertycache
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diff changeset
223 def manifestlog(self):
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224 rootstore = unionmanifest(
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225 self.nodeconstants,
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226 self.svfs,
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227 self.repo2.svfs,
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diff changeset
228 self.unfiltered()._clrev,
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229 )
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230 return manifest.manifestlog(
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diff changeset
231 self.svfs, self, rootstore, self.narrowmatch()
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diff changeset
232 )
39779
5ccd791344f3 localrepo: pass root manifest into manifestlog.__init__
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diff changeset
233
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234 def _clrev(self, rev2):
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parents:
diff changeset
235 """map from repo2 changelog rev to temporary rev in self.changelog"""
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parents:
diff changeset
236 node = self.repo2.changelog.node(rev2)
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parents:
diff changeset
237 return self.changelog.rev(node)
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parents:
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238
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parents:
diff changeset
239 def url(self):
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parents:
diff changeset
240 return self._url
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parents:
diff changeset
241
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diff changeset
242 def file(self, f):
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diff changeset
243 return unionfilelog(
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diff changeset
244 self.svfs, f, self.repo2.svfs, self.unfiltered()._clrev, self
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diff changeset
245 )
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246
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diff changeset
247 def close(self):
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diff changeset
248 self.repo2.close()
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249
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diff changeset
250 def cancopy(self):
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diff changeset
251 return False
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252
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253 def peer(self):
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254 return unionpeer(self)
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255
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diff changeset
256 def getcwd(self):
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diff changeset
257 return encoding.getcwd() # always outside the repo
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diff changeset
258
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259
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diff changeset
260 def instance(ui, path, create, intents=None, createopts=None):
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diff changeset
261 if create:
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diff changeset
262 raise error.Abort(_(b'cannot create new union repository'))
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Augie Fackler <augie@google.com>
parents: 43076
diff changeset
263 parentpath = ui.config(b"bundle", b"mainreporoot")
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parents:
diff changeset
264 if not parentpath:
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parents:
diff changeset
265 # try to find the correct path to the working directory repo
39823
24e493ec2229 py3: rename pycompat.getcwd() to encoding.getcwd() (API)
Matt Harbison <matt_harbison@yahoo.com>
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266 parentpath = cmdutil.findrepo(encoding.getcwd())
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267 if parentpath is None:
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268 parentpath = b''
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269 if parentpath:
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270 # Try to make the full path relative so we get a nice, short URL.
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271 # In particular, we don't want temp dir names in test outputs.
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272 cwd = encoding.getcwd()
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273 if parentpath == cwd:
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274 parentpath = b''
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275 else:
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276 cwd = pathutil.normasprefix(cwd)
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277 if parentpath.startswith(cwd):
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278 parentpath = parentpath[len(cwd) :]
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279 if path.startswith(b'union:'):
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280 s = path.split(b":", 1)[1].split(b"+", 1)
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281 if len(s) == 1:
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282 repopath, repopath2 = parentpath, s[0]
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283 else:
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284 repopath, repopath2 = s
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285 else:
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286 repopath, repopath2 = parentpath, path
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287
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288 return makeunionrepository(ui, repopath, repopath2)
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289
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290
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291 def makeunionrepository(ui, repopath1, repopath2):
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292 """Make a union repository object from 2 local repo paths."""
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293 repo1 = localrepo.instance(ui, repopath1, create=False)
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294 repo2 = localrepo.instance(ui, repopath2, create=False)
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295
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296 url = b'union:%s+%s' % (
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297 util.expandpath(repopath1),
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298 util.expandpath(repopath2),
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299 )
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300
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301 class derivedunionrepository(unionrepository, repo1.__class__):
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302 pass
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303
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304 repo = repo1
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305 repo.__class__ = derivedunionrepository
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306 unionrepository.__init__(repo1, repo2, url)
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307
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308 return repo