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1 | 1 | # unionrepo.py - repository class for viewing union of repository changesets |
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2 | 2 | # |
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3 | 3 | # Derived from bundlerepo.py |
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4 | 4 | # Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com> |
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5 | 5 | # Copyright 2013 Unity Technologies, Mads Kiilerich <madski@unity3d.com> |
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6 | 6 | # |
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7 | 7 | # This software may be used and distributed according to the terms of the |
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8 | 8 | # GNU General Public License version 2 or any later version. |
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9 | 9 | |
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10 | 10 | """Repository class for "in-memory pull" of one local repository to another, |
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11 | 11 | allowing operations like diff and log with revsets. |
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12 | 12 | """ |
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13 | 13 | |
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14 | 14 | from __future__ import absolute_import |
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15 | 15 | |
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16 | 16 | from .i18n import _ |
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17 | 17 | |
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18 | 18 | from . import ( |
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19 | 19 | changelog, |
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20 | 20 | cmdutil, |
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21 | 21 | encoding, |
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22 | 22 | error, |
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23 | 23 | filelog, |
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24 | 24 | localrepo, |
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25 | 25 | manifest, |
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26 | 26 | mdiff, |
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27 | 27 | pathutil, |
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28 | 28 | revlog, |
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29 | 29 | util, |
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30 | 30 | vfs as vfsmod, |
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31 | 31 | ) |
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32 | 32 | |
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33 | 33 | class unionrevlog(revlog.revlog): |
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34 | 34 | def __init__(self, opener, indexfile, revlog2, linkmapper): |
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35 | 35 | # How it works: |
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36 | 36 | # To retrieve a revision, we just need to know the node id so we can |
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37 | 37 | # look it up in revlog2. |
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38 | 38 | # |
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39 | 39 | # To differentiate a rev in the second revlog from a rev in the revlog, |
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40 | 40 | # we check revision against repotiprev. |
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41 | 41 | opener = vfsmod.readonlyvfs(opener) |
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42 | 42 | revlog.revlog.__init__(self, opener, indexfile) |
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43 | 43 | self.revlog2 = revlog2 |
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44 | 44 | |
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45 | 45 | n = len(self) |
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46 | 46 | self.repotiprev = n - 1 |
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47 | 47 | self.bundlerevs = set() # used by 'bundle()' revset expression |
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48 | 48 | for rev2 in self.revlog2: |
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49 | 49 | rev = self.revlog2.index[rev2] |
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50 | 50 | # rev numbers - in revlog2, very different from self.rev |
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51 | 51 | _start, _csize, rsize, base, linkrev, p1rev, p2rev, node = rev |
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52 | 52 | flags = _start & 0xFFFF |
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53 | 53 | |
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54 | 54 | if linkmapper is None: # link is to same revlog |
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55 | 55 | assert linkrev == rev2 # we never link back |
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56 | 56 | link = n |
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57 | 57 | else: # rev must be mapped from repo2 cl to unified cl by linkmapper |
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58 | 58 | link = linkmapper(linkrev) |
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59 | 59 | |
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60 | 60 | if linkmapper is not None: # link is to same revlog |
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61 | 61 | base = linkmapper(base) |
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62 | 62 | |
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63 | 63 | if node in self.nodemap: |
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64 | 64 | # this happens for the common revlog revisions |
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65 | 65 | self.bundlerevs.add(self.nodemap[node]) |
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66 | 66 | continue |
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67 | 67 | |
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68 | 68 | p1node = self.revlog2.node(p1rev) |
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69 | 69 | p2node = self.revlog2.node(p2rev) |
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70 | 70 | |
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71 | 71 | # TODO: it's probably wrong to set compressed length to None, but |
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72 | 72 | # I have no idea if csize is valid in the base revlog context. |
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73 | 73 | e = (flags, None, rsize, base, |
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74 | 74 | link, self.rev(p1node), self.rev(p2node), node) |
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75 | 75 | self.index.append(e) |
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76 | 76 | self.nodemap[node] = n |
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77 | 77 | self.bundlerevs.add(n) |
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78 | 78 | n += 1 |
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79 | 79 | |
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80 | 80 | def _chunk(self, rev): |
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81 | 81 | if rev <= self.repotiprev: |
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82 | 82 | return revlog.revlog._chunk(self, rev) |
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83 | 83 | return self.revlog2._chunk(self.node(rev)) |
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84 | 84 | |
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85 | 85 | def revdiff(self, rev1, rev2): |
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86 | 86 | """return or calculate a delta between two revisions""" |
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87 | 87 | if rev1 > self.repotiprev and rev2 > self.repotiprev: |
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88 | 88 | return self.revlog2.revdiff( |
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89 | 89 | self.revlog2.rev(self.node(rev1)), |
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90 | 90 | self.revlog2.rev(self.node(rev2))) |
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91 | 91 | elif rev1 <= self.repotiprev and rev2 <= self.repotiprev: |
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92 | 92 | return super(unionrevlog, self).revdiff(rev1, rev2) |
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93 | 93 | |
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94 | 94 | return mdiff.textdiff(self.rawdata(rev1), self.rawdata(rev2)) |
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95 | 95 | |
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96 | 96 | def _revisiondata(self, nodeorrev, _df=None, raw=False): |
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97 | 97 | if isinstance(nodeorrev, int): |
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98 | 98 | rev = nodeorrev |
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99 | 99 | node = self.node(rev) |
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100 | 100 | else: |
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101 | 101 | node = nodeorrev |
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102 | 102 | rev = self.rev(node) |
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103 | 103 | |
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104 | 104 | if rev > self.repotiprev: |
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105 | 105 | # work around manifestrevlog NOT being a revlog |
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106 | 106 | revlog2 = getattr(self.revlog2, '_revlog', self.revlog2) |
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107 | 107 | func = revlog2._revisiondata |
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108 | 108 | else: |
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109 | 109 | func = super(unionrevlog, self)._revisiondata |
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110 | 110 | return func(node, _df=_df, raw=raw) |
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111 | 111 | |
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112 | 112 | def rawdata(self, nodeorrev, _df=None): |
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113 | 113 | return self.revision(nodeorrev, _df=_df, raw=True) |
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114 | 114 | |
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115 | def baserevdiff(self, rev1, rev2): | |
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116 | # Revlog subclasses may override 'revdiff' method to modify format of | |
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117 | # content retrieved from revlog. To use unionrevlog with such class one | |
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118 | # needs to override 'baserevdiff' and make more specific call here. | |
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119 | return revlog.revlog.revdiff(self, rev1, rev2) | |
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120 | ||
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121 | 115 | def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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122 | 116 | raise NotImplementedError |
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123 | 117 | def addgroup(self, deltas, linkmapper, transaction, addrevisioncb=None, |
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124 | 118 | maybemissingparents=False): |
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125 | 119 | raise NotImplementedError |
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126 | 120 | def strip(self, minlink, transaction): |
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127 | 121 | raise NotImplementedError |
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128 | 122 | def checksize(self): |
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129 | 123 | raise NotImplementedError |
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130 | 124 | |
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131 | 125 | class unionchangelog(unionrevlog, changelog.changelog): |
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132 | 126 | def __init__(self, opener, opener2): |
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133 | 127 | changelog.changelog.__init__(self, opener) |
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134 | 128 | linkmapper = None |
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135 | 129 | changelog2 = changelog.changelog(opener2) |
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136 | 130 | unionrevlog.__init__(self, opener, self.indexfile, changelog2, |
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137 | 131 | linkmapper) |
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138 | 132 | |
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139 | def baserevdiff(self, rev1, rev2): | |
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140 | # Although changelog doesn't override 'revdiff' method, some extensions | |
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141 | # may replace this class with another that does. Same story with | |
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142 | # manifest and filelog classes. | |
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143 | return changelog.changelog.revdiff(self, rev1, rev2) | |
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144 | ||
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145 | 133 | class unionmanifest(unionrevlog, manifest.manifestrevlog): |
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146 | 134 | def __init__(self, opener, opener2, linkmapper): |
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147 | 135 | manifest.manifestrevlog.__init__(self, opener) |
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148 | 136 | manifest2 = manifest.manifestrevlog(opener2) |
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149 | 137 | unionrevlog.__init__(self, opener, self.indexfile, manifest2, |
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150 | 138 | linkmapper) |
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151 | 139 | |
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152 | def baserevdiff(self, rev1, rev2): | |
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153 | return manifest.manifestrevlog.revdiff(self, rev1, rev2) | |
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154 | ||
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155 | 140 | class unionfilelog(filelog.filelog): |
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156 | 141 | def __init__(self, opener, path, opener2, linkmapper, repo): |
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157 | 142 | filelog.filelog.__init__(self, opener, path) |
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158 | 143 | filelog2 = filelog.filelog(opener2, path) |
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159 | 144 | self._revlog = unionrevlog(opener, self.indexfile, |
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160 | 145 | filelog2._revlog, linkmapper) |
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161 | 146 | self._repo = repo |
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162 | 147 | self.repotiprev = self._revlog.repotiprev |
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163 | 148 | self.revlog2 = self._revlog.revlog2 |
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164 | 149 | |
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165 | def baserevdiff(self, rev1, rev2): | |
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166 | return filelog.filelog.revdiff(self, rev1, rev2) | |
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167 | ||
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168 | 150 | def iscensored(self, rev): |
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169 | 151 | """Check if a revision is censored.""" |
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170 | 152 | if rev <= self.repotiprev: |
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171 | 153 | return filelog.filelog.iscensored(self, rev) |
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172 | 154 | node = self.node(rev) |
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173 | 155 | return self.revlog2.iscensored(self.revlog2.rev(node)) |
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174 | 156 | |
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175 | 157 | class unionpeer(localrepo.localpeer): |
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176 | 158 | def canpush(self): |
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177 | 159 | return False |
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178 | 160 | |
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179 | 161 | class unionrepository(object): |
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180 | 162 | """Represents the union of data in 2 repositories. |
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181 | 163 | |
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182 | 164 | Instances are not usable if constructed directly. Use ``instance()`` |
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183 | 165 | or ``makeunionrepository()`` to create a usable instance. |
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184 | 166 | """ |
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185 | 167 | def __init__(self, repo2, url): |
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186 | 168 | self.repo2 = repo2 |
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187 | 169 | self._url = url |
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188 | 170 | |
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189 | 171 | self.ui.setconfig('phases', 'publish', False, 'unionrepo') |
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190 | 172 | |
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191 | 173 | @localrepo.unfilteredpropertycache |
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192 | 174 | def changelog(self): |
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193 | 175 | return unionchangelog(self.svfs, self.repo2.svfs) |
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194 | 176 | |
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195 | 177 | @localrepo.unfilteredpropertycache |
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196 | 178 | def manifestlog(self): |
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197 | 179 | rootstore = unionmanifest(self.svfs, self.repo2.svfs, |
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198 | 180 | self.unfiltered()._clrev) |
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199 | 181 | return manifest.manifestlog(self.svfs, self, rootstore, |
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200 | 182 | self.narrowmatch()) |
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201 | 183 | |
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202 | 184 | def _clrev(self, rev2): |
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203 | 185 | """map from repo2 changelog rev to temporary rev in self.changelog""" |
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204 | 186 | node = self.repo2.changelog.node(rev2) |
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205 | 187 | return self.changelog.rev(node) |
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206 | 188 | |
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207 | 189 | def url(self): |
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208 | 190 | return self._url |
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209 | 191 | |
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210 | 192 | def file(self, f): |
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211 | 193 | return unionfilelog(self.svfs, f, self.repo2.svfs, |
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212 | 194 | self.unfiltered()._clrev, self) |
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213 | 195 | |
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214 | 196 | def close(self): |
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215 | 197 | self.repo2.close() |
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216 | 198 | |
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217 | 199 | def cancopy(self): |
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218 | 200 | return False |
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219 | 201 | |
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220 | 202 | def peer(self): |
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221 | 203 | return unionpeer(self) |
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222 | 204 | |
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223 | 205 | def getcwd(self): |
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224 | 206 | return encoding.getcwd() # always outside the repo |
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225 | 207 | |
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226 | 208 | def instance(ui, path, create, intents=None, createopts=None): |
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227 | 209 | if create: |
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228 | 210 | raise error.Abort(_('cannot create new union repository')) |
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229 | 211 | parentpath = ui.config("bundle", "mainreporoot") |
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230 | 212 | if not parentpath: |
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231 | 213 | # try to find the correct path to the working directory repo |
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232 | 214 | parentpath = cmdutil.findrepo(encoding.getcwd()) |
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233 | 215 | if parentpath is None: |
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234 | 216 | parentpath = '' |
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235 | 217 | if parentpath: |
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236 | 218 | # Try to make the full path relative so we get a nice, short URL. |
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237 | 219 | # In particular, we don't want temp dir names in test outputs. |
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238 | 220 | cwd = encoding.getcwd() |
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239 | 221 | if parentpath == cwd: |
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240 | 222 | parentpath = '' |
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241 | 223 | else: |
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242 | 224 | cwd = pathutil.normasprefix(cwd) |
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243 | 225 | if parentpath.startswith(cwd): |
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244 | 226 | parentpath = parentpath[len(cwd):] |
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245 | 227 | if path.startswith('union:'): |
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246 | 228 | s = path.split(":", 1)[1].split("+", 1) |
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247 | 229 | if len(s) == 1: |
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248 | 230 | repopath, repopath2 = parentpath, s[0] |
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249 | 231 | else: |
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250 | 232 | repopath, repopath2 = s |
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251 | 233 | else: |
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252 | 234 | repopath, repopath2 = parentpath, path |
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253 | 235 | |
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254 | 236 | return makeunionrepository(ui, repopath, repopath2) |
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255 | 237 | |
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256 | 238 | def makeunionrepository(ui, repopath1, repopath2): |
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257 | 239 | """Make a union repository object from 2 local repo paths.""" |
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258 | 240 | repo1 = localrepo.instance(ui, repopath1, create=False) |
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259 | 241 | repo2 = localrepo.instance(ui, repopath2, create=False) |
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260 | 242 | |
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261 | 243 | url = 'union:%s+%s' % (util.expandpath(repopath1), |
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262 | 244 | util.expandpath(repopath2)) |
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263 | 245 | |
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264 | 246 | class derivedunionrepository(unionrepository, repo1.__class__): |
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265 | 247 | pass |
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266 | 248 | |
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267 | 249 | repo = repo1 |
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268 | 250 | repo.__class__ = derivedunionrepository |
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269 | 251 | unionrepository.__init__(repo1, repo2, url) |
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270 | 252 | |
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271 | 253 | return repo |
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