Mercurial > hg
annotate mercurial/bundlerepo.py @ 24071:184a2f6f40da
bundle2.unbundle20: add compressed() method
Bundlerepo uses the compressed() method to determine whether it should write
an uncompressed temporary file. Since we don't support compressed bundle2 files
at the moment, make this method return true.
author | Eric Sumner <ericsumner@fb.com> |
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date | Thu, 05 Feb 2015 15:56:50 -0800 |
parents | b95a5bb58653 |
children | 145b823f5ce7 |
rev | line source |
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1 # bundlerepo.py - repository class for viewing uncompressed bundles |
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2 # |
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3 # Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 """Repository class for viewing uncompressed bundles. |
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9 |
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10 This provides a read-only repository interface to bundles as if they |
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11 were part of the actual repository. |
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12 """ |
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13 |
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14 from node import nullid |
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17 import changegroup, util, mdiff, discovery, cmdutil, scmutil, exchange |
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18 import localrepo, changelog, manifest, filelog, revlog, error, phases |
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19 |
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20 class bundlerevlog(revlog.revlog): |
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21 def __init__(self, opener, indexfile, bundle, linkmapper): |
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22 # How it works: |
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23 # To retrieve a revision, we need to know the offset of the revision in |
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24 # the bundle (an unbundle object). We store this offset in the index |
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25 # (start). The base of the delta is stored in the base field. |
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26 # |
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27 # To differentiate a rev in the bundle from a rev in the revlog, we |
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28 # check revision against repotiprev. |
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29 opener = scmutil.readonlyvfs(opener) |
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30 revlog.revlog.__init__(self, opener, indexfile) |
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31 self.bundle = bundle |
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32 n = len(self) |
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33 self.repotiprev = n - 1 |
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34 chain = None |
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35 self.bundlerevs = set() # used by 'bundle()' revset expression |
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36 while True: |
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37 chunkdata = bundle.deltachunk(chain) |
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38 if not chunkdata: |
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39 break |
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40 node = chunkdata['node'] |
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41 p1 = chunkdata['p1'] |
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42 p2 = chunkdata['p2'] |
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43 cs = chunkdata['cs'] |
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44 deltabase = chunkdata['deltabase'] |
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45 delta = chunkdata['delta'] |
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46 |
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47 size = len(delta) |
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48 start = bundle.tell() - size |
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49 |
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50 link = linkmapper(cs) |
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51 if node in self.nodemap: |
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52 # this can happen if two branches make the same change |
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53 chain = node |
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54 self.bundlerevs.add(self.nodemap[node]) |
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55 continue |
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56 |
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57 for p in (p1, p2): |
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58 if p not in self.nodemap: |
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59 raise error.LookupError(p, self.indexfile, |
7633 | 60 _("unknown parent")) |
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61 |
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62 if deltabase not in self.nodemap: |
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63 raise LookupError(deltabase, self.indexfile, |
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64 _('unknown delta base')) |
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65 |
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66 baserev = self.rev(deltabase) |
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67 # start, size, full unc. size, base (unused), link, p1, p2, node |
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68 e = (revlog.offset_type(start, 0), size, -1, baserev, link, |
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69 self.rev(p1), self.rev(p2), 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 chain = node |
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74 n += 1 |
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75 |
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76 def _chunk(self, rev): |
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77 # Warning: in case of bundle, the diff is against what we stored as |
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78 # delta base, not against rev - 1 |
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79 # XXX: could use some caching |
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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 self.bundle.seek(self.start(rev)) |
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83 return self.bundle.read(self.length(rev)) |
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84 |
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85 def revdiff(self, rev1, rev2): |
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86 """return or calculate a delta between two revisions""" |
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87 if rev1 > self.repotiprev and rev2 > self.repotiprev: |
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88 # hot path for bundle |
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89 revb = self.index[rev2][3] |
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90 if revb == rev1: |
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91 return self._chunk(rev2) |
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92 elif rev1 <= self.repotiprev and rev2 <= self.repotiprev: |
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93 return revlog.revlog.revdiff(self, rev1, rev2) |
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94 |
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95 return mdiff.textdiff(self.revision(self.node(rev1)), |
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96 self.revision(self.node(rev2))) |
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97 |
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98 def revision(self, nodeorrev): |
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99 """return an uncompressed revision of a given node or revision |
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100 number. |
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101 """ |
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102 if isinstance(nodeorrev, int): |
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103 rev = nodeorrev |
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104 node = self.node(rev) |
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105 else: |
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106 node = nodeorrev |
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107 rev = self.rev(node) |
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108 |
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109 if node == nullid: |
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110 return "" |
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111 |
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112 text = None |
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113 chain = [] |
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114 iterrev = rev |
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115 # reconstruct the revision if it is from a changegroup |
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116 while iterrev > self.repotiprev: |
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117 if self._cache and self._cache[1] == iterrev: |
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119 break |
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120 chain.append(iterrev) |
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121 iterrev = self.index[iterrev][3] |
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122 if text is None: |
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123 text = self.baserevision(iterrev) |
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124 |
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125 while chain: |
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126 delta = self._chunk(chain.pop()) |
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127 text = mdiff.patches(text, [delta]) |
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128 |
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129 self._checkhash(text, node, rev) |
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130 self._cache = (node, rev, text) |
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131 return text |
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132 |
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133 def baserevision(self, nodeorrev): |
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134 # Revlog subclasses may override 'revision' method to modify format of |
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135 # content retrieved from revlog. To use bundlerevlog with such class one |
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136 # needs to override 'baserevision' and make more specific call here. |
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137 return revlog.revlog.revision(self, nodeorrev) |
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138 |
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139 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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140 raise NotImplementedError |
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141 def addgroup(self, revs, linkmapper, transaction): |
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142 raise NotImplementedError |
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143 def strip(self, rev, minlink): |
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144 raise NotImplementedError |
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145 def checksize(self): |
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146 raise NotImplementedError |
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147 |
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148 class bundlechangelog(bundlerevlog, changelog.changelog): |
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149 def __init__(self, opener, bundle): |
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150 changelog.changelog.__init__(self, opener) |
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151 linkmapper = lambda x: x |
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152 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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153 linkmapper) |
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154 |
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155 def baserevision(self, nodeorrev): |
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156 # Although changelog doesn't override 'revision' method, some extensions |
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157 # may replace this class with another that does. Same story with |
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158 # manifest and filelog classes. |
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159 return changelog.changelog.revision(self, nodeorrev) |
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160 |
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161 class bundlemanifest(bundlerevlog, manifest.manifest): |
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162 def __init__(self, opener, bundle, linkmapper): |
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163 manifest.manifest.__init__(self, opener) |
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164 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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165 linkmapper) |
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166 |
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167 def baserevision(self, nodeorrev): |
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168 return manifest.manifest.revision(self, nodeorrev) |
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169 |
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170 class bundlefilelog(bundlerevlog, filelog.filelog): |
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171 def __init__(self, opener, path, bundle, linkmapper, repo): |
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172 filelog.filelog.__init__(self, opener, path) |
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173 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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174 linkmapper) |
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175 self._repo = repo |
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176 |
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177 def baserevision(self, nodeorrev): |
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178 return filelog.filelog.revision(self, nodeorrev) |
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179 |
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180 class bundlepeer(localrepo.localpeer): |
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181 def canpush(self): |
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182 return False |
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183 |
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184 class bundlephasecache(phases.phasecache): |
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185 def __init__(self, *args, **kwargs): |
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186 super(bundlephasecache, self).__init__(*args, **kwargs) |
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187 if util.safehasattr(self, 'opener'): |
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188 self.opener = scmutil.readonlyvfs(self.opener) |
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189 |
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190 def write(self): |
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191 raise NotImplementedError |
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192 |
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193 def _write(self, fp): |
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194 raise NotImplementedError |
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195 |
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196 def _updateroots(self, phase, newroots, tr): |
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197 self.phaseroots[phase] = newroots |
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198 self.invalidate() |
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199 self.dirty = True |
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200 |
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201 class bundlerepository(localrepo.localrepository): |
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202 def __init__(self, ui, path, bundlename): |
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203 self._tempparent = None |
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204 try: |
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205 localrepo.localrepository.__init__(self, ui, path) |
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207 self._tempparent = tempfile.mkdtemp() |
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208 localrepo.instance(ui, self._tempparent, 1) |
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209 localrepo.localrepository.__init__(self, ui, self._tempparent) |
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210 self.ui.setconfig('phases', 'publish', False, 'bundlerepo') |
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211 |
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212 if path: |
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213 self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename |
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214 else: |
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215 self._url = 'bundle:' + bundlename |
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216 |
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217 self.tempfile = None |
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218 f = util.posixfile(bundlename, "rb") |
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219 self.bundle = exchange.readbundle(ui, f, bundlename) |
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220 if self.bundle.compressed(): |
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221 fdtemp, temp = self.vfs.mkstemp(prefix="hg-bundle-", |
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222 suffix=".hg10un") |
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223 self.tempfile = temp |
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224 fptemp = os.fdopen(fdtemp, 'wb') |
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225 |
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226 try: |
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227 fptemp.write("HG10UN") |
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228 while True: |
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229 chunk = self.bundle.read(2**18) |
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230 if not chunk: |
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231 break |
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232 fptemp.write(chunk) |
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233 finally: |
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234 fptemp.close() |
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235 |
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236 f = self.vfs.open(self.tempfile, mode="rb") |
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237 self.bundle = exchange.readbundle(ui, f, bundlename, self.vfs) |
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238 |
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239 # dict with the mapping 'filename' -> position in the bundle |
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240 self.bundlefilespos = {} |
5262 | 241 |
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242 self.firstnewrev = self.changelog.repotiprev + 1 |
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243 phases.retractboundary(self, None, phases.draft, |
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244 [ctx.node() for ctx in self[self.firstnewrev:]]) |
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245 |
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246 @localrepo.unfilteredpropertycache |
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247 def _phasecache(self): |
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248 return bundlephasecache(self, self._phasedefaults) |
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249 |
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250 @localrepo.unfilteredpropertycache |
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251 def changelog(self): |
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252 # consume the header if it exists |
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253 self.bundle.changelogheader() |
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254 c = bundlechangelog(self.svfs, self.bundle) |
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255 self.manstart = self.bundle.tell() |
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256 return c |
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257 |
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258 @localrepo.unfilteredpropertycache |
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259 def manifest(self): |
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260 self.bundle.seek(self.manstart) |
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261 # consume the header if it exists |
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262 self.bundle.manifestheader() |
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263 m = bundlemanifest(self.svfs, self.bundle, self.changelog.rev) |
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264 self.filestart = self.bundle.tell() |
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265 return m |
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266 |
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267 @localrepo.unfilteredpropertycache |
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268 def manstart(self): |
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269 self.changelog |
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270 return self.manstart |
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271 |
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272 @localrepo.unfilteredpropertycache |
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273 def filestart(self): |
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274 self.manifest |
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275 return self.filestart |
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276 |
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277 def url(self): |
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278 return self._url |
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279 |
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280 def file(self, f): |
5262 | 281 if not self.bundlefilespos: |
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282 self.bundle.seek(self.filestart) |
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283 while True: |
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284 chunkdata = self.bundle.filelogheader() |
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285 if not chunkdata: |
5262 | 286 break |
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287 fname = chunkdata['filename'] |
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288 self.bundlefilespos[fname] = self.bundle.tell() |
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289 while True: |
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290 c = self.bundle.deltachunk(None) |
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291 if not c: |
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292 break |
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294 if f in self.bundlefilespos: |
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295 self.bundle.seek(self.bundlefilespos[f]) |
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296 return bundlefilelog(self.svfs, f, self.bundle, |
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297 self.changelog.rev, self) |
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298 else: |
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299 return filelog.filelog(self.svfs, f) |
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300 |
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301 def close(self): |
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302 """Close assigned bundle file immediately.""" |
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303 self.bundle.close() |
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304 if self.tempfile is not None: |
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305 self.vfs.unlink(self.tempfile) |
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306 if self._tempparent: |
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307 shutil.rmtree(self._tempparent, True) |
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308 |
6315 | 309 def cancopy(self): |
310 return False | |
311 | |
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312 def peer(self): |
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313 return bundlepeer(self) |
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314 |
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315 def getcwd(self): |
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316 return os.getcwd() # always outside the repo |
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317 |
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318 |
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319 def instance(ui, path, create): |
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320 if create: |
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321 raise util.Abort(_('cannot create new bundle repository')) |
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322 parentpath = ui.config("bundle", "mainreporoot", "") |
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323 if not parentpath: |
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324 # try to find the correct path to the working directory repo |
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325 parentpath = cmdutil.findrepo(os.getcwd()) |
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326 if parentpath is None: |
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327 parentpath = '' |
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328 if parentpath: |
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329 # Try to make the full path relative so we get a nice, short URL. |
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330 # In particular, we don't want temp dir names in test outputs. |
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331 cwd = os.getcwd() |
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332 if parentpath == cwd: |
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333 parentpath = '' |
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334 else: |
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335 cwd = os.path.join(cwd,'') |
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336 if parentpath.startswith(cwd): |
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337 parentpath = parentpath[len(cwd):] |
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338 u = util.url(path) |
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339 path = u.localpath() |
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340 if u.scheme == 'bundle': |
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341 s = path.split("+", 1) |
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342 if len(s) == 1: |
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343 repopath, bundlename = parentpath, s[0] |
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344 else: |
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345 repopath, bundlename = s |
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346 else: |
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347 repopath, bundlename = parentpath, path |
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348 return bundlerepository(ui, repopath, bundlename) |
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349 |
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350 class bundletransactionmanager(object): |
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351 def transaction(self): |
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352 return None |
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353 |
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354 def close(self): |
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355 raise NotImplementedError |
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356 |
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357 def release(self): |
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358 raise NotImplementedError |
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359 |
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360 def getremotechanges(ui, repo, other, onlyheads=None, bundlename=None, |
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361 force=False): |
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362 '''obtains a bundle of changes incoming from other |
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363 |
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364 "onlyheads" restricts the returned changes to those reachable from the |
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365 specified heads. |
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366 "bundlename", if given, stores the bundle to this file path permanently; |
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367 otherwise it's stored to a temp file and gets deleted again when you call |
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368 the returned "cleanupfn". |
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369 "force" indicates whether to proceed on unrelated repos. |
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370 |
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371 Returns a tuple (local, csets, cleanupfn): |
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372 |
16683 | 373 "local" is a local repo from which to obtain the actual incoming |
374 changesets; it is a bundlerepo for the obtained bundle when the | |
375 original "other" is remote. | |
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376 "csets" lists the incoming changeset node ids. |
16683 | 377 "cleanupfn" must be called without arguments when you're done processing |
378 the changes; it closes both the original "other" and the one returned | |
379 here. | |
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380 ''' |
16683 | 381 tmp = discovery.findcommonincoming(repo, other, heads=onlyheads, |
382 force=force) | |
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383 common, incoming, rheads = tmp |
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384 if not incoming: |
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385 try: |
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386 if bundlename: |
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387 os.unlink(bundlename) |
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388 except OSError: |
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389 pass |
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390 return repo, [], other.close |
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391 |
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392 commonset = set(common) |
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393 rheads = [x for x in rheads if x not in commonset] |
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394 |
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395 bundle = None |
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396 bundlerepo = None |
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397 localrepo = other.local() |
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398 if bundlename or not localrepo: |
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399 # create a bundle (uncompressed if other repo is not local) |
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400 |
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401 if other.capable('getbundle'): |
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402 cg = other.getbundle('incoming', common=common, heads=rheads) |
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403 elif onlyheads is None and not other.capable('changegroupsubset'): |
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404 # compat with older servers when pulling all remote heads |
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405 cg = other.changegroup(incoming, "incoming") |
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406 rheads = None |
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407 else: |
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408 cg = other.changegroupsubset(incoming, rheads, 'incoming') |
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409 bundletype = localrepo and "HG10BZ" or "HG10UN" |
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410 fname = bundle = changegroup.writebundle(ui, cg, bundlename, bundletype) |
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411 # keep written bundle? |
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412 if bundlename: |
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413 bundle = None |
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414 if not localrepo: |
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415 # use the created uncompressed bundlerepo |
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416 localrepo = bundlerepo = bundlerepository(repo.baseui, repo.root, |
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417 fname) |
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418 # this repo contains local and other now, so filter out local again |
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419 common = repo.heads() |
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420 if localrepo: |
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421 # Part of common may be remotely filtered |
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422 # So use an unfiltered version |
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423 # The discovery process probably need cleanup to avoid that |
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424 localrepo = localrepo.unfiltered() |
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425 |
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426 csets = localrepo.changelog.findmissing(common, rheads) |
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427 |
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428 if bundlerepo: |
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429 reponodes = [ctx.node() for ctx in bundlerepo[bundlerepo.firstnewrev:]] |
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430 remotephases = other.listkeys('phases') |
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431 |
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432 pullop = exchange.pulloperation(bundlerepo, other, heads=reponodes) |
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433 pullop.trmanager = bundletransactionmanager() |
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434 exchange._pullapplyphases(pullop, remotephases) |
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435 |
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436 def cleanup(): |
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437 if bundlerepo: |
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438 bundlerepo.close() |
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439 if bundle: |
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440 os.unlink(bundle) |
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441 other.close() |
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442 |
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443 return (localrepo, csets, cleanup) |