Mercurial > hg
annotate mercurial/unionrepo.py @ 26189:663fbc336e22
ui: change default path fallback mechanism (issue4796)
The previous paths API code always fell back to the default path. This
was wrong because if a requested path doesn't exist, that should error.
Only if no path was requested should we fall back to the default.
As part of implementing the test case for issue 4796, it was discovered
that the "repository does not exist" error message raised by
localrepository.__init__ wasn't being seen because the paths API
validates paths before localrepository.__init__ was being called.
The exception and error message from localrepository.__init__ has
been introduced to getpath(). This necessitated rewriting
expandpath() both to catch the exception and to have proper
default fallback.
This code is more complicated than I'd like. But making all tests pass
was a big chore. As more code moves to getpath(), there will likely be
opportunities to improve things a bit.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 06 Sep 2015 11:28:48 -0700 |
parents | 83f220c7d6f0 |
children | 6b16a3538c20 |
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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 import os |
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17 |
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18 from .i18n import _ |
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19 from .node import nullid |
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20 |
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21 from . import ( |
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22 changelog, |
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23 cmdutil, |
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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 scmutil, |
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31 util, |
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32 ) |
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33 |
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34 class unionrevlog(revlog.revlog): |
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35 def __init__(self, opener, indexfile, revlog2, linkmapper): |
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36 # How it works: |
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37 # To retrieve a revision, we just need to know the node id so we can |
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38 # look it up in revlog2. |
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39 # |
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40 # To differentiate a rev in the second revlog from a rev in the revlog, |
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41 # we check revision against repotiprev. |
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42 opener = scmutil.readonlyvfs(opener) |
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43 revlog.revlog.__init__(self, opener, indexfile) |
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44 self.revlog2 = revlog2 |
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45 |
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46 n = len(self) |
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47 self.repotiprev = n - 1 |
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48 self.bundlerevs = set() # used by 'bundle()' revset expression |
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49 for rev2 in self.revlog2: |
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50 rev = self.revlog2.index[rev2] |
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51 # rev numbers - in revlog2, very different from self.rev |
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52 _start, _csize, _rsize, _base, linkrev, p1rev, p2rev, node = rev |
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53 |
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54 if linkmapper is None: # link is to same revlog |
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55 assert linkrev == rev2 # we never link back |
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56 link = n |
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57 else: # rev must be mapped from repo2 cl to unified cl by linkmapper |
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58 link = linkmapper(linkrev) |
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59 |
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60 if node in self.nodemap: |
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61 # this happens for the common revlog revisions |
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62 self.bundlerevs.add(self.nodemap[node]) |
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63 continue |
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64 |
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65 p1node = self.revlog2.node(p1rev) |
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66 p2node = self.revlog2.node(p2rev) |
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67 |
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68 e = (None, None, None, None, |
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69 link, self.rev(p1node), self.rev(p2node), node) |
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70 self.index.insert(-1, e) |
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71 self.nodemap[node] = n |
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72 self.bundlerevs.add(n) |
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73 n += 1 |
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74 |
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75 def _chunk(self, rev): |
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76 if rev <= self.repotiprev: |
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77 return revlog.revlog._chunk(self, rev) |
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78 return self.revlog2._chunk(self.node(rev)) |
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79 |
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80 def revdiff(self, rev1, rev2): |
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81 """return or calculate a delta between two revisions""" |
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82 if rev1 > self.repotiprev and rev2 > self.repotiprev: |
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83 return self.revlog2.revdiff( |
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84 self.revlog2.rev(self.node(rev1)), |
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85 self.revlog2.rev(self.node(rev2))) |
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86 elif rev1 <= self.repotiprev and rev2 <= self.repotiprev: |
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87 return self.baserevdiff(rev1, rev2) |
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88 |
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89 return mdiff.textdiff(self.revision(self.node(rev1)), |
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90 self.revision(self.node(rev2))) |
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91 |
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92 def revision(self, nodeorrev): |
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93 """return an uncompressed revision of a given node or revision |
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94 number. |
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95 """ |
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96 if isinstance(nodeorrev, int): |
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97 rev = nodeorrev |
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98 node = self.node(rev) |
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99 else: |
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100 node = nodeorrev |
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101 rev = self.rev(node) |
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102 |
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103 if node == nullid: |
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104 return "" |
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105 |
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106 if rev > self.repotiprev: |
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107 text = self.revlog2.revision(node) |
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108 self._cache = (node, rev, text) |
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109 else: |
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110 text = self.baserevision(rev) |
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111 # already cached |
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112 return text |
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113 |
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114 def baserevision(self, nodeorrev): |
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115 # Revlog subclasses may override 'revision' method to modify format of |
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116 # content retrieved from revlog. To use unionrevlog with such class one |
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117 # needs to override 'baserevision' and make more specific call here. |
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118 return revlog.revlog.revision(self, nodeorrev) |
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119 |
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120 def baserevdiff(self, rev1, rev2): |
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121 # Exists for the same purpose as baserevision. |
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122 return revlog.revlog.revdiff(self, rev1, rev2) |
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123 |
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124 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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125 raise NotImplementedError |
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126 def addgroup(self, revs, linkmapper, transaction): |
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127 raise NotImplementedError |
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128 def strip(self, rev, minlink): |
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129 raise NotImplementedError |
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130 def checksize(self): |
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131 raise NotImplementedError |
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132 |
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133 class unionchangelog(unionrevlog, changelog.changelog): |
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134 def __init__(self, opener, opener2): |
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135 changelog.changelog.__init__(self, opener) |
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136 linkmapper = None |
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137 changelog2 = changelog.changelog(opener2) |
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138 unionrevlog.__init__(self, opener, self.indexfile, changelog2, |
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139 linkmapper) |
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140 |
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141 def baserevision(self, nodeorrev): |
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142 # Although changelog doesn't override 'revision' method, some extensions |
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143 # may replace this class with another that does. Same story with |
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144 # manifest and filelog classes. |
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145 return changelog.changelog.revision(self, nodeorrev) |
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146 |
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147 def baserevdiff(self, rev1, rev2): |
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148 return changelog.changelog.revdiff(self, rev1, rev2) |
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149 |
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150 class unionmanifest(unionrevlog, manifest.manifest): |
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151 def __init__(self, opener, opener2, linkmapper): |
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152 manifest.manifest.__init__(self, opener) |
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153 manifest2 = manifest.manifest(opener2) |
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154 unionrevlog.__init__(self, opener, self.indexfile, manifest2, |
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155 linkmapper) |
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156 |
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157 def baserevision(self, nodeorrev): |
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158 return manifest.manifest.revision(self, nodeorrev) |
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159 |
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160 def baserevdiff(self, rev1, rev2): |
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161 return manifest.manifest.revdiff(self, rev1, rev2) |
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162 |
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163 class unionfilelog(unionrevlog, filelog.filelog): |
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164 def __init__(self, opener, path, opener2, linkmapper, repo): |
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165 filelog.filelog.__init__(self, opener, path) |
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166 filelog2 = filelog.filelog(opener2, path) |
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167 unionrevlog.__init__(self, opener, self.indexfile, filelog2, |
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168 linkmapper) |
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169 self._repo = repo |
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170 |
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171 def baserevision(self, nodeorrev): |
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172 return filelog.filelog.revision(self, nodeorrev) |
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173 |
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174 def baserevdiff(self, rev1, rev2): |
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175 return filelog.filelog.revdiff(self, rev1, rev2) |
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176 |
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177 def iscensored(self, rev): |
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178 """Check if a revision is censored.""" |
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179 if rev <= self.repotiprev: |
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180 return filelog.filelog.iscensored(self, rev) |
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181 return self.revlog2.iscensored(rev) |
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182 |
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183 class unionpeer(localrepo.localpeer): |
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184 def canpush(self): |
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185 return False |
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186 |
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187 class unionrepository(localrepo.localrepository): |
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188 def __init__(self, ui, path, path2): |
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189 localrepo.localrepository.__init__(self, ui, path) |
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190 self.ui.setconfig('phases', 'publish', False, 'unionrepo') |
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191 |
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192 self._url = 'union:%s+%s' % (util.expandpath(path), |
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193 util.expandpath(path2)) |
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194 self.repo2 = localrepo.localrepository(ui, path2) |
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195 |
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196 @localrepo.unfilteredpropertycache |
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197 def changelog(self): |
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198 return unionchangelog(self.svfs, self.repo2.svfs) |
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199 |
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200 def _clrev(self, rev2): |
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201 """map from repo2 changelog rev to temporary rev in self.changelog""" |
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202 node = self.repo2.changelog.node(rev2) |
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203 return self.changelog.rev(node) |
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204 |
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205 @localrepo.unfilteredpropertycache |
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206 def manifest(self): |
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207 return unionmanifest(self.svfs, self.repo2.svfs, |
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208 self._clrev) |
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209 |
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210 def url(self): |
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211 return self._url |
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212 |
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213 def file(self, f): |
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214 return unionfilelog(self.svfs, f, self.repo2.svfs, |
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215 self._clrev, self) |
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216 |
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217 def close(self): |
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218 self.repo2.close() |
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219 |
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220 def cancopy(self): |
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221 return False |
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222 |
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223 def peer(self): |
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224 return unionpeer(self) |
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225 |
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226 def getcwd(self): |
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227 return os.getcwd() # always outside the repo |
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228 |
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229 def instance(ui, path, create): |
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230 if create: |
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231 raise util.Abort(_('cannot create new union repository')) |
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232 parentpath = ui.config("bundle", "mainreporoot", "") |
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233 if not parentpath: |
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234 # try to find the correct path to the working directory repo |
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235 parentpath = cmdutil.findrepo(os.getcwd()) |
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236 if parentpath is None: |
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237 parentpath = '' |
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238 if parentpath: |
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239 # Try to make the full path relative so we get a nice, short URL. |
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240 # In particular, we don't want temp dir names in test outputs. |
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241 cwd = os.getcwd() |
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242 if parentpath == cwd: |
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243 parentpath = '' |
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244 else: |
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245 cwd = pathutil.normasprefix(cwd) |
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246 if parentpath.startswith(cwd): |
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247 parentpath = parentpath[len(cwd):] |
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248 if path.startswith('union:'): |
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249 s = path.split(":", 1)[1].split("+", 1) |
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250 if len(s) == 1: |
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251 repopath, repopath2 = parentpath, s[0] |
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252 else: |
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253 repopath, repopath2 = s |
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254 else: |
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255 repopath, repopath2 = parentpath, path |
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256 return unionrepository(ui, repopath, repopath2) |