Mercurial > hg
annotate mercurial/bundlerepo.py @ 21769:4a54d9f1b6b6
convert: define norepo in command decorator
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 04 May 2014 22:02:25 -0700 |
parents | c08a22bfa16e |
children | 510cafe72004 |
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 |
3891 | 15 from i18n import _ |
14158 | 16 import os, tempfile, shutil |
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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 |
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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 def _file(self, f): |
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181 self._repo.file(f) |
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182 |
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183 class bundlepeer(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 bundlerepository(localrepo.localrepository): |
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188 def __init__(self, ui, path, bundlename): |
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189 self._tempparent = None |
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190 try: |
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191 localrepo.localrepository.__init__(self, ui, path) |
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193 self._tempparent = tempfile.mkdtemp() |
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194 localrepo.instance(ui, self._tempparent, 1) |
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195 localrepo.localrepository.__init__(self, ui, self._tempparent) |
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196 self.ui.setconfig('phases', 'publish', False, 'bundlerepo') |
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197 |
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198 if path: |
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199 self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename |
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200 else: |
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201 self._url = 'bundle:' + bundlename |
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202 |
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203 self.tempfile = None |
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204 f = util.posixfile(bundlename, "rb") |
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205 self.bundle = exchange.readbundle(ui, f, bundlename) |
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206 if self.bundle.compressed(): |
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207 fdtemp, temp = self.vfs.mkstemp(prefix="hg-bundle-", |
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208 suffix=".hg10un") |
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209 self.tempfile = temp |
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210 fptemp = os.fdopen(fdtemp, 'wb') |
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211 |
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212 try: |
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213 fptemp.write("HG10UN") |
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214 while True: |
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215 chunk = self.bundle.read(2**18) |
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216 if not chunk: |
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217 break |
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218 fptemp.write(chunk) |
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219 finally: |
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220 fptemp.close() |
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221 |
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222 f = self.vfs.open(self.tempfile, mode="rb") |
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223 self.bundle = exchange.readbundle(ui, f, bundlename, self.vfs) |
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224 |
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225 # dict with the mapping 'filename' -> position in the bundle |
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226 self.bundlefilespos = {} |
5262 | 227 |
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228 @localrepo.unfilteredpropertycache |
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229 def changelog(self): |
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230 # consume the header if it exists |
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231 self.bundle.changelogheader() |
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232 c = bundlechangelog(self.sopener, self.bundle) |
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233 self.manstart = self.bundle.tell() |
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234 return c |
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235 |
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236 @localrepo.unfilteredpropertycache |
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237 def manifest(self): |
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238 self.bundle.seek(self.manstart) |
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239 # consume the header if it exists |
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240 self.bundle.manifestheader() |
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241 m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev) |
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242 self.filestart = self.bundle.tell() |
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243 return m |
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244 |
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245 @localrepo.unfilteredpropertycache |
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246 def manstart(self): |
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247 self.changelog |
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248 return self.manstart |
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249 |
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250 @localrepo.unfilteredpropertycache |
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251 def filestart(self): |
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252 self.manifest |
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253 return self.filestart |
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254 |
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255 def url(self): |
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256 return self._url |
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257 |
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258 def file(self, f): |
5262 | 259 if not self.bundlefilespos: |
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260 self.bundle.seek(self.filestart) |
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261 while True: |
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262 chunkdata = self.bundle.filelogheader() |
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263 if not chunkdata: |
5262 | 264 break |
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265 fname = chunkdata['filename'] |
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266 self.bundlefilespos[fname] = self.bundle.tell() |
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267 while True: |
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268 c = self.bundle.deltachunk(None) |
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269 if not c: |
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270 break |
5262 | 271 |
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272 if f in self.bundlefilespos: |
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273 self.bundle.seek(self.bundlefilespos[f]) |
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274 return bundlefilelog(self.sopener, f, self.bundle, |
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275 self.changelog.rev, self) |
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276 else: |
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277 return filelog.filelog(self.sopener, f) |
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278 |
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279 def close(self): |
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280 """Close assigned bundle file immediately.""" |
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281 self.bundle.close() |
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282 if self.tempfile is not None: |
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283 self.vfs.unlink(self.tempfile) |
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284 if self._tempparent: |
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285 shutil.rmtree(self._tempparent, True) |
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286 |
6315 | 287 def cancopy(self): |
288 return False | |
289 | |
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290 def peer(self): |
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291 return bundlepeer(self) |
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292 |
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293 def getcwd(self): |
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294 return os.getcwd() # always outside the repo |
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295 |
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296 |
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297 def instance(ui, path, create): |
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298 if create: |
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299 raise util.Abort(_('cannot create new bundle repository')) |
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300 parentpath = ui.config("bundle", "mainreporoot", "") |
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301 if not parentpath: |
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302 # try to find the correct path to the working directory repo |
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303 parentpath = cmdutil.findrepo(os.getcwd()) |
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304 if parentpath is None: |
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305 parentpath = '' |
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306 if parentpath: |
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307 # Try to make the full path relative so we get a nice, short URL. |
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308 # In particular, we don't want temp dir names in test outputs. |
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309 cwd = os.getcwd() |
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310 if parentpath == cwd: |
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311 parentpath = '' |
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312 else: |
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313 cwd = os.path.join(cwd,'') |
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314 if parentpath.startswith(cwd): |
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315 parentpath = parentpath[len(cwd):] |
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316 u = util.url(path) |
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317 path = u.localpath() |
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318 if u.scheme == 'bundle': |
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319 s = path.split("+", 1) |
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320 if len(s) == 1: |
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321 repopath, bundlename = parentpath, s[0] |
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322 else: |
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323 repopath, bundlename = s |
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324 else: |
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325 repopath, bundlename = parentpath, path |
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326 return bundlerepository(ui, repopath, bundlename) |
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327 |
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328 def getremotechanges(ui, repo, other, onlyheads=None, bundlename=None, |
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329 force=False): |
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330 '''obtains a bundle of changes incoming from other |
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331 |
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332 "onlyheads" restricts the returned changes to those reachable from the |
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333 specified heads. |
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334 "bundlename", if given, stores the bundle to this file path permanently; |
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335 otherwise it's stored to a temp file and gets deleted again when you call |
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336 the returned "cleanupfn". |
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337 "force" indicates whether to proceed on unrelated repos. |
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338 |
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339 Returns a tuple (local, csets, cleanupfn): |
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340 |
16683 | 341 "local" is a local repo from which to obtain the actual incoming |
342 changesets; it is a bundlerepo for the obtained bundle when the | |
343 original "other" is remote. | |
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344 "csets" lists the incoming changeset node ids. |
16683 | 345 "cleanupfn" must be called without arguments when you're done processing |
346 the changes; it closes both the original "other" and the one returned | |
347 here. | |
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348 ''' |
16683 | 349 tmp = discovery.findcommonincoming(repo, other, heads=onlyheads, |
350 force=force) | |
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351 common, incoming, rheads = tmp |
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352 if not incoming: |
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353 try: |
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354 if bundlename: |
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355 os.unlink(bundlename) |
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356 except OSError: |
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357 pass |
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358 return repo, [], other.close |
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359 |
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360 bundle = None |
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361 bundlerepo = None |
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362 localrepo = other.local() |
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363 if bundlename or not localrepo: |
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364 # create a bundle (uncompressed if other repo is not local) |
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365 |
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366 if other.capable('getbundle'): |
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367 cg = other.getbundle('incoming', common=common, heads=rheads) |
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368 elif onlyheads is None and not other.capable('changegroupsubset'): |
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369 # compat with older servers when pulling all remote heads |
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370 cg = other.changegroup(incoming, "incoming") |
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371 rheads = None |
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372 else: |
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373 cg = other.changegroupsubset(incoming, rheads, 'incoming') |
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374 bundletype = localrepo and "HG10BZ" or "HG10UN" |
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375 fname = bundle = changegroup.writebundle(cg, bundlename, bundletype) |
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376 # keep written bundle? |
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377 if bundlename: |
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378 bundle = None |
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379 if not localrepo: |
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380 # use the created uncompressed bundlerepo |
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381 localrepo = bundlerepo = bundlerepository(repo.baseui, repo.root, |
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382 fname) |
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383 # this repo contains local and other now, so filter out local again |
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384 common = repo.heads() |
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385 if localrepo: |
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386 # Part of common may be remotely filtered |
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387 # So use an unfiltered version |
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388 # The discovery process probably need cleanup to avoid that |
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389 localrepo = localrepo.unfiltered() |
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390 |
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391 csets = localrepo.changelog.findmissing(common, rheads) |
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392 |
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393 def cleanup(): |
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394 if bundlerepo: |
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395 bundlerepo.close() |
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396 if bundle: |
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397 os.unlink(bundle) |
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398 other.close() |
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399 |
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400 return (localrepo, csets, cleanup) |