Mercurial > hg
annotate mercurial/unionrepo.py @ 45203:ae5c1a3bc339
commitctx: extract the function in a dedicated module
the function have few callers (< 15) is quite long a mostly independent from the
repository itself. It seems like a good candidate to reduce the bloatness of the
localrepository class. Extracting it will help us cleaning the code up and
splitting it into more reasonable-size function.
We don't use a copy trick because the amount of code extract is quite small
(<5%) and the de-indent means every single line change anyway. So this is not
deemed valuable to do so.
This is part of a larger refactoring/cleanup of the commitctx code to clarify
and augment the logic gathering metadata useful for copy tracing. The current
code is a tad too long and entangled to make such update easy.
Differential Revision: https://phab.mercurial-scm.org/D8709
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Mon, 06 Jul 2020 23:14:52 +0200 |
parents | f212cc5ffceb |
children | a5206e71c536 |
rev | line source |
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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 revlog.revlog.__init__(self, opener, indexfile) |
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45 self.revlog2 = revlog2 |
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46 |
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47 n = len(self) |
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48 self.repotiprev = n - 1 |
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49 self.bundlerevs = set() # used by 'bundle()' revset expression |
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50 for rev2 in self.revlog2: |
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51 rev = self.revlog2.index[rev2] |
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52 # rev numbers - in revlog2, very different from self.rev |
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53 _start, _csize, rsize, base, linkrev, p1rev, p2rev, node = rev |
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54 flags = _start & 0xFFFF |
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55 |
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56 if linkmapper is None: # link is to same revlog |
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57 assert linkrev == rev2 # we never link back |
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58 link = n |
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59 else: # rev must be mapped from repo2 cl to unified cl by linkmapper |
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60 link = linkmapper(linkrev) |
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61 |
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62 if linkmapper is not None: # link is to same revlog |
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63 base = linkmapper(base) |
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64 |
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65 this_rev = self.index.get_rev(node) |
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66 if this_rev is not None: |
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67 # this happens for the common revlog revisions |
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68 self.bundlerevs.add(this_rev) |
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69 continue |
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70 |
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71 p1node = self.revlog2.node(p1rev) |
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72 p2node = self.revlog2.node(p2rev) |
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73 |
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74 # TODO: it's probably wrong to set compressed length to None, but |
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75 # I have no idea if csize is valid in the base revlog context. |
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76 e = ( |
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77 flags, |
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78 None, |
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79 rsize, |
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80 base, |
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81 link, |
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82 self.rev(p1node), |
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83 self.rev(p2node), |
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84 node, |
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85 ) |
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86 self.index.append(e) |
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87 self.bundlerevs.add(n) |
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88 n += 1 |
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89 |
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90 def _chunk(self, rev): |
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91 if rev <= self.repotiprev: |
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92 return revlog.revlog._chunk(self, rev) |
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93 return self.revlog2._chunk(self.node(rev)) |
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94 |
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95 def revdiff(self, rev1, rev2): |
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96 """return or calculate a delta between two revisions""" |
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97 if rev1 > self.repotiprev and rev2 > self.repotiprev: |
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98 return self.revlog2.revdiff( |
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99 self.revlog2.rev(self.node(rev1)), |
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100 self.revlog2.rev(self.node(rev2)), |
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101 ) |
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102 elif rev1 <= self.repotiprev and rev2 <= self.repotiprev: |
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103 return super(unionrevlog, self).revdiff(rev1, rev2) |
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104 |
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105 return mdiff.textdiff(self.rawdata(rev1), self.rawdata(rev2)) |
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106 |
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107 def _revisiondata(self, nodeorrev, _df=None, raw=False): |
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108 if isinstance(nodeorrev, int): |
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109 rev = nodeorrev |
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110 node = self.node(rev) |
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111 else: |
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112 node = nodeorrev |
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113 rev = self.rev(node) |
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114 |
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115 if rev > self.repotiprev: |
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116 # work around manifestrevlog NOT being a revlog |
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117 revlog2 = getattr(self.revlog2, '_revlog', self.revlog2) |
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118 func = revlog2._revisiondata |
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119 else: |
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120 func = super(unionrevlog, self)._revisiondata |
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121 return func(node, _df=_df, raw=raw) |
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122 |
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123 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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124 raise NotImplementedError |
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125 |
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126 def addgroup( |
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127 self, |
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128 deltas, |
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129 linkmapper, |
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130 transaction, |
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131 addrevisioncb=None, |
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132 maybemissingparents=False, |
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133 ): |
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134 raise NotImplementedError |
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135 |
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136 def strip(self, minlink, transaction): |
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137 raise NotImplementedError |
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138 |
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139 def checksize(self): |
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140 raise NotImplementedError |
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141 |
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142 |
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143 class unionchangelog(unionrevlog, changelog.changelog): |
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144 def __init__(self, opener, opener2): |
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145 changelog.changelog.__init__(self, opener) |
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146 linkmapper = None |
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147 changelog2 = changelog.changelog(opener2) |
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148 unionrevlog.__init__( |
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149 self, opener, self.indexfile, changelog2, linkmapper |
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150 ) |
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151 |
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152 |
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153 class unionmanifest(unionrevlog, manifest.manifestrevlog): |
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154 def __init__(self, opener, opener2, linkmapper): |
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155 manifest.manifestrevlog.__init__(self, opener) |
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156 manifest2 = manifest.manifestrevlog(opener2) |
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157 unionrevlog.__init__( |
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158 self, opener, self.indexfile, manifest2, linkmapper |
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159 ) |
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160 |
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161 |
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162 class unionfilelog(filelog.filelog): |
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163 def __init__(self, opener, path, opener2, linkmapper, repo): |
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164 filelog.filelog.__init__(self, opener, path) |
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165 filelog2 = filelog.filelog(opener2, path) |
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166 self._revlog = unionrevlog( |
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167 opener, self.indexfile, filelog2._revlog, linkmapper |
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168 ) |
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169 self._repo = repo |
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170 self.repotiprev = self._revlog.repotiprev |
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171 self.revlog2 = self._revlog.revlog2 |
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172 |
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173 def iscensored(self, rev): |
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174 """Check if a revision is censored.""" |
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175 if rev <= self.repotiprev: |
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176 return filelog.filelog.iscensored(self, rev) |
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177 node = self.node(rev) |
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178 return self.revlog2.iscensored(self.revlog2.rev(node)) |
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179 |
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180 |
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181 class unionpeer(localrepo.localpeer): |
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182 def canpush(self): |
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183 return False |
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184 |
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185 |
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186 class unionrepository(object): |
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187 """Represents the union of data in 2 repositories. |
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188 |
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189 Instances are not usable if constructed directly. Use ``instance()`` |
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190 or ``makeunionrepository()`` to create a usable instance. |
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191 """ |
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192 |
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193 def __init__(self, repo2, url): |
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194 self.repo2 = repo2 |
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195 self._url = url |
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196 |
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197 self.ui.setconfig(b'phases', b'publish', False, b'unionrepo') |
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198 |
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199 @localrepo.unfilteredpropertycache |
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200 def changelog(self): |
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201 return unionchangelog(self.svfs, self.repo2.svfs) |
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202 |
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203 @localrepo.unfilteredpropertycache |
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204 def manifestlog(self): |
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205 rootstore = unionmanifest( |
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206 self.svfs, self.repo2.svfs, self.unfiltered()._clrev |
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207 ) |
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208 return manifest.manifestlog( |
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209 self.svfs, self, rootstore, self.narrowmatch() |
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210 ) |
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211 |
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212 def _clrev(self, rev2): |
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213 """map from repo2 changelog rev to temporary rev in self.changelog""" |
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214 node = self.repo2.changelog.node(rev2) |
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215 return self.changelog.rev(node) |
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216 |
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217 def url(self): |
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218 return self._url |
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219 |
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220 def file(self, f): |
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221 return unionfilelog( |
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222 self.svfs, f, self.repo2.svfs, self.unfiltered()._clrev, self |
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223 ) |
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224 |
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225 def close(self): |
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226 self.repo2.close() |
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227 |
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228 def cancopy(self): |
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229 return False |
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230 |
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231 def peer(self): |
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232 return unionpeer(self) |
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233 |
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234 def getcwd(self): |
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235 return encoding.getcwd() # always outside the repo |
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236 |
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237 |
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238 def instance(ui, path, create, intents=None, createopts=None): |
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239 if create: |
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240 raise error.Abort(_(b'cannot create new union repository')) |
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241 parentpath = ui.config(b"bundle", b"mainreporoot") |
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242 if not parentpath: |
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243 # try to find the correct path to the working directory repo |
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244 parentpath = cmdutil.findrepo(encoding.getcwd()) |
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245 if parentpath is None: |
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246 parentpath = b'' |
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247 if parentpath: |
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248 # Try to make the full path relative so we get a nice, short URL. |
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249 # In particular, we don't want temp dir names in test outputs. |
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250 cwd = encoding.getcwd() |
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251 if parentpath == cwd: |
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252 parentpath = b'' |
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253 else: |
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254 cwd = pathutil.normasprefix(cwd) |
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255 if parentpath.startswith(cwd): |
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256 parentpath = parentpath[len(cwd) :] |
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257 if path.startswith(b'union:'): |
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258 s = path.split(b":", 1)[1].split(b"+", 1) |
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259 if len(s) == 1: |
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260 repopath, repopath2 = parentpath, s[0] |
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261 else: |
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262 repopath, repopath2 = s |
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263 else: |
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264 repopath, repopath2 = parentpath, path |
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265 |
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266 return makeunionrepository(ui, repopath, repopath2) |
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267 |
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268 |
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269 def makeunionrepository(ui, repopath1, repopath2): |
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270 """Make a union repository object from 2 local repo paths.""" |
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271 repo1 = localrepo.instance(ui, repopath1, create=False) |
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272 repo2 = localrepo.instance(ui, repopath2, create=False) |
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273 |
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274 url = b'union:%s+%s' % ( |
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275 util.expandpath(repopath1), |
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276 util.expandpath(repopath2), |
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277 ) |
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278 |
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279 class derivedunionrepository(unionrepository, repo1.__class__): |
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280 pass |
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281 |
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282 repo = repo1 |
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283 repo.__class__ = derivedunionrepository |
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284 unionrepository.__init__(repo1, repo2, url) |
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285 |
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286 return repo |