Mercurial > hg
annotate mercurial/unionrepo.py @ 32078:bf5e13e38390 stable
pager: use less as a fallback on Unix
This seems reasonable choice per discussion, and the default-default of Git.
See also the inline-comment for why.
https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-April/097042.html
author | Yuya Nishihara <yuya@tcha.org> |
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date | Fri, 28 Apr 2017 20:51:14 +0900 |
parents | f1e0446e804c |
children | 634997248c97 |
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 .node import nullid |
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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 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 pycompat, |
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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 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 = vfsmod.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 flags = _start & 0xFFFF |
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54 |
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55 if linkmapper is None: # link is to same revlog |
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56 assert linkrev == rev2 # we never link back |
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57 link = n |
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58 else: # rev must be mapped from repo2 cl to unified cl by linkmapper |
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59 link = linkmapper(linkrev) |
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60 |
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61 if linkmapper is not None: # link is to same revlog |
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62 base = linkmapper(base) |
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63 |
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64 if node in self.nodemap: |
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65 # this happens for the common revlog revisions |
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66 self.bundlerevs.add(self.nodemap[node]) |
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67 continue |
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68 |
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69 p1node = self.revlog2.node(p1rev) |
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70 p2node = self.revlog2.node(p2rev) |
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71 |
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72 e = (flags, None, None, base, |
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73 link, self.rev(p1node), self.rev(p2node), node) |
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74 self.index.insert(-1, e) |
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75 self.nodemap[node] = n |
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76 self.bundlerevs.add(n) |
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77 n += 1 |
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78 |
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79 def _chunk(self, rev): |
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80 if rev <= self.repotiprev: |
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81 return revlog.revlog._chunk(self, rev) |
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82 return self.revlog2._chunk(self.node(rev)) |
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83 |
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84 def revdiff(self, rev1, rev2): |
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85 """return or calculate a delta between two revisions""" |
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86 if rev1 > self.repotiprev and rev2 > self.repotiprev: |
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87 return self.revlog2.revdiff( |
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88 self.revlog2.rev(self.node(rev1)), |
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89 self.revlog2.rev(self.node(rev2))) |
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90 elif rev1 <= self.repotiprev and rev2 <= self.repotiprev: |
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91 return self.baserevdiff(rev1, rev2) |
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92 |
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93 return mdiff.textdiff(self.revision(rev1), self.revision(rev2)) |
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94 |
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95 def revision(self, nodeorrev, raw=False): |
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96 """return an uncompressed revision of a given node or revision |
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97 number. |
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98 """ |
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99 if isinstance(nodeorrev, int): |
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100 rev = nodeorrev |
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101 node = self.node(rev) |
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102 else: |
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103 node = nodeorrev |
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104 rev = self.rev(node) |
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105 |
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106 if node == nullid: |
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107 return "" |
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108 |
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109 if rev > self.repotiprev: |
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110 text = self.revlog2.revision(node) |
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111 self._cache = (node, rev, text) |
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112 else: |
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113 text = self.baserevision(rev) |
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114 # already cached |
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115 return text |
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116 |
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117 def baserevision(self, nodeorrev): |
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118 # Revlog subclasses may override 'revision' method to modify format of |
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119 # content retrieved from revlog. To use unionrevlog with such class one |
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120 # needs to override 'baserevision' and make more specific call here. |
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121 return revlog.revlog.revision(self, nodeorrev) |
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122 |
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123 def baserevdiff(self, rev1, rev2): |
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124 # Exists for the same purpose as baserevision. |
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125 return revlog.revlog.revdiff(self, rev1, rev2) |
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126 |
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127 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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128 raise NotImplementedError |
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129 def addgroup(self, revs, linkmapper, transaction): |
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130 raise NotImplementedError |
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131 def strip(self, rev, minlink): |
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132 raise NotImplementedError |
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133 def checksize(self): |
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134 raise NotImplementedError |
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135 |
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136 class unionchangelog(unionrevlog, changelog.changelog): |
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137 def __init__(self, opener, opener2): |
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138 changelog.changelog.__init__(self, opener) |
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139 linkmapper = None |
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140 changelog2 = changelog.changelog(opener2) |
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141 unionrevlog.__init__(self, opener, self.indexfile, changelog2, |
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142 linkmapper) |
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143 |
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144 def baserevision(self, nodeorrev): |
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145 # Although changelog doesn't override 'revision' method, some extensions |
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146 # may replace this class with another that does. Same story with |
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147 # manifest and filelog classes. |
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148 return changelog.changelog.revision(self, nodeorrev) |
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149 |
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150 def baserevdiff(self, rev1, rev2): |
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151 return changelog.changelog.revdiff(self, rev1, rev2) |
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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__(self, opener, self.indexfile, manifest2, |
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158 linkmapper) |
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159 |
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160 def baserevision(self, nodeorrev): |
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161 return manifest.manifestrevlog.revision(self, nodeorrev) |
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162 |
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163 def baserevdiff(self, rev1, rev2): |
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164 return manifest.manifestrevlog.revdiff(self, rev1, rev2) |
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165 |
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166 class unionfilelog(unionrevlog, filelog.filelog): |
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167 def __init__(self, opener, path, opener2, linkmapper, repo): |
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168 filelog.filelog.__init__(self, opener, path) |
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169 filelog2 = filelog.filelog(opener2, path) |
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170 unionrevlog.__init__(self, opener, self.indexfile, filelog2, |
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171 linkmapper) |
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172 self._repo = repo |
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173 |
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174 def baserevision(self, nodeorrev): |
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175 return filelog.filelog.revision(self, nodeorrev) |
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176 |
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177 def baserevdiff(self, rev1, rev2): |
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178 return filelog.filelog.revdiff(self, rev1, rev2) |
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179 |
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180 def iscensored(self, rev): |
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181 """Check if a revision is censored.""" |
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182 if rev <= self.repotiprev: |
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183 return filelog.filelog.iscensored(self, rev) |
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184 node = self.node(rev) |
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185 return self.revlog2.iscensored(self.revlog2.rev(node)) |
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186 |
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187 class unionpeer(localrepo.localpeer): |
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188 def canpush(self): |
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189 return False |
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190 |
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191 class unionrepository(localrepo.localrepository): |
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192 def __init__(self, ui, path, path2): |
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193 localrepo.localrepository.__init__(self, ui, path) |
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194 self.ui.setconfig('phases', 'publish', False, 'unionrepo') |
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195 |
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196 self._url = 'union:%s+%s' % (util.expandpath(path), |
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197 util.expandpath(path2)) |
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198 self.repo2 = localrepo.localrepository(ui, path2) |
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199 |
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200 @localrepo.unfilteredpropertycache |
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201 def changelog(self): |
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202 return unionchangelog(self.svfs, self.repo2.svfs) |
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203 |
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204 def _clrev(self, rev2): |
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205 """map from repo2 changelog rev to temporary rev in self.changelog""" |
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206 node = self.repo2.changelog.node(rev2) |
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207 return self.changelog.rev(node) |
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208 |
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209 def _constructmanifest(self): |
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210 return unionmanifest(self.svfs, self.repo2.svfs, |
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211 self.unfiltered()._clrev) |
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212 |
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213 def url(self): |
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214 return self._url |
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215 |
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216 def file(self, f): |
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217 return unionfilelog(self.svfs, f, self.repo2.svfs, |
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218 self.unfiltered()._clrev, self) |
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219 |
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220 def close(self): |
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221 self.repo2.close() |
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222 |
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223 def cancopy(self): |
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224 return False |
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225 |
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226 def peer(self): |
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227 return unionpeer(self) |
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228 |
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229 def getcwd(self): |
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230 return pycompat.getcwd() # always outside the repo |
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231 |
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232 def instance(ui, path, create): |
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233 if create: |
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234 raise error.Abort(_('cannot create new union repository')) |
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235 parentpath = ui.config("bundle", "mainreporoot", "") |
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236 if not parentpath: |
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237 # try to find the correct path to the working directory repo |
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238 parentpath = cmdutil.findrepo(pycompat.getcwd()) |
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239 if parentpath is None: |
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240 parentpath = '' |
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241 if parentpath: |
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242 # Try to make the full path relative so we get a nice, short URL. |
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243 # In particular, we don't want temp dir names in test outputs. |
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244 cwd = pycompat.getcwd() |
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245 if parentpath == cwd: |
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246 parentpath = '' |
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247 else: |
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248 cwd = pathutil.normasprefix(cwd) |
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249 if parentpath.startswith(cwd): |
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250 parentpath = parentpath[len(cwd):] |
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251 if path.startswith('union:'): |
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252 s = path.split(":", 1)[1].split("+", 1) |
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253 if len(s) == 1: |
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254 repopath, repopath2 = parentpath, s[0] |
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255 else: |
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256 repopath, repopath2 = s |
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257 else: |
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258 repopath, repopath2 = parentpath, path |
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259 return unionrepository(ui, repopath, repopath2) |