Mercurial > hg-stable
annotate mercurial/bundlerepo.py @ 18413:0ccb16f5956a
bundlerepo: drop bundlebase wrapper function for basemap
author | Mads Kiilerich <madski@unity3d.com> |
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date | Wed, 16 Jan 2013 20:41:41 +0100 |
parents | a928865b4a4f |
children | c448562ad85b |
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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 |
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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). |
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26 # |
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27 # basemap is indexed with revisions coming from the bundle, and it |
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28 # maps to the node that is the base of the corresponding delta. |
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29 # |
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30 # To differentiate a rev in the bundle from a rev in the revlog, we |
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31 # check revision against basemap. |
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32 opener = scmutil.readonlyvfs(opener) |
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33 revlog.revlog.__init__(self, opener, indexfile) |
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34 self.bundle = bundle |
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35 self.basemap = {} |
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36 n = len(self) |
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37 chain = None |
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38 self.bundlerevs = set() # used by 'bundle()' revset expression |
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39 while True: |
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40 chunkdata = bundle.deltachunk(chain) |
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41 if not chunkdata: |
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42 break |
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43 node = chunkdata['node'] |
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44 p1 = chunkdata['p1'] |
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45 p2 = chunkdata['p2'] |
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46 cs = chunkdata['cs'] |
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47 deltabase = chunkdata['deltabase'] |
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48 delta = chunkdata['delta'] |
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49 |
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50 size = len(delta) |
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51 start = bundle.tell() - size |
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52 |
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53 link = linkmapper(cs) |
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54 if node in self.nodemap: |
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55 # this can happen if two branches make the same change |
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56 chain = node |
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57 self.bundlerevs.add(self.nodemap[node]) |
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58 continue |
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59 |
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60 for p in (p1, p2): |
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61 if p not in self.nodemap: |
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62 raise error.LookupError(p, self.indexfile, |
7633 | 63 _("unknown parent")) |
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64 # start, size, full unc. size, base (unused), link, p1, p2, node |
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65 e = (revlog.offset_type(start, 0), size, -1, -1, link, |
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66 self.rev(p1), self.rev(p2), node) |
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67 self.basemap[n] = deltabase |
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68 self.index.insert(-1, e) |
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69 self.nodemap[node] = n |
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70 self.bundlerevs.add(n) |
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71 chain = node |
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72 n += 1 |
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73 |
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74 def inbundle(self, rev): |
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75 """is rev from the bundle""" |
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76 if rev < 0: |
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77 return False |
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78 return rev in self.basemap |
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79 |
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80 def _chunk(self, rev): |
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81 # Warning: in case of bundle, the diff is against self.basemap, |
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82 # not against rev - 1 |
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83 # XXX: could use some caching |
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84 if not self.inbundle(rev): |
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85 return revlog.revlog._chunk(self, rev) |
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86 self.bundle.seek(self.start(rev)) |
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87 return self.bundle.read(self.length(rev)) |
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88 |
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89 def revdiff(self, rev1, rev2): |
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90 """return or calculate a delta between two revisions""" |
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91 if self.inbundle(rev1) and self.inbundle(rev2): |
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92 # hot path for bundle |
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93 revb = self.rev(self.basemap[rev2]) |
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94 if revb == rev1: |
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95 return self._chunk(rev2) |
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96 elif not self.inbundle(rev1) and not self.inbundle(rev2): |
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97 return revlog.revlog.revdiff(self, rev1, rev2) |
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98 |
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99 return mdiff.textdiff(self.revision(self.node(rev1)), |
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100 self.revision(self.node(rev2))) |
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101 |
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102 def revision(self, nodeorrev): |
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103 """return an uncompressed revision of a given node or revision |
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104 number. |
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105 """ |
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106 if isinstance(nodeorrev, int): |
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107 rev = nodeorrev |
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108 node = self.node(rev) |
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109 else: |
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110 node = nodeorrev |
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111 rev = self.rev(node) |
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112 |
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113 if node == nullid: |
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114 return "" |
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115 |
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116 text = None |
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117 chain = [] |
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118 iter_node = node |
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119 # reconstruct the revision if it is from a changegroup |
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120 while self.inbundle(rev): |
4984 | 121 if self._cache and self._cache[0] == iter_node: |
122 text = self._cache[2] | |
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123 break |
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124 chain.append(rev) |
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125 iter_node = self.basemap[rev] |
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126 rev = self.rev(iter_node) |
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127 if text is None: |
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128 text = revlog.revlog.revision(self, iter_node) |
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129 |
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130 while chain: |
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131 delta = self._chunk(chain.pop()) |
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132 text = mdiff.patches(text, [delta]) |
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133 |
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134 p1, p2 = self.parents(node) |
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135 if node != revlog.hash(text, p1, p2): |
7633 | 136 raise error.RevlogError(_("integrity check failed on %s:%d") |
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137 % (self.datafile, self.rev(node))) |
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138 |
4984 | 139 self._cache = (node, self.rev(node), text) |
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140 return text |
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141 |
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142 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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143 raise NotImplementedError |
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144 def addgroup(self, revs, linkmapper, transaction): |
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145 raise NotImplementedError |
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146 def strip(self, rev, minlink): |
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147 raise NotImplementedError |
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148 def checksize(self): |
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149 raise NotImplementedError |
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150 |
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151 class bundlechangelog(bundlerevlog, changelog.changelog): |
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152 def __init__(self, opener, bundle): |
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153 changelog.changelog.__init__(self, opener) |
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154 linkmapper = lambda x: x |
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155 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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156 linkmapper) |
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157 |
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158 class bundlemanifest(bundlerevlog, manifest.manifest): |
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159 def __init__(self, opener, bundle, linkmapper): |
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160 manifest.manifest.__init__(self, opener) |
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161 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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162 linkmapper) |
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163 |
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164 class bundlefilelog(bundlerevlog, filelog.filelog): |
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165 def __init__(self, opener, path, bundle, linkmapper, repo): |
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166 filelog.filelog.__init__(self, opener, path) |
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167 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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168 linkmapper) |
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169 self._repo = repo |
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170 |
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171 def _file(self, f): |
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172 self._repo.file(f) |
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173 |
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174 class bundlepeer(localrepo.localpeer): |
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175 def canpush(self): |
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176 return False |
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177 |
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178 class bundlerepository(localrepo.localrepository): |
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179 def __init__(self, ui, path, bundlename): |
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180 self._tempparent = None |
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181 try: |
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182 localrepo.localrepository.__init__(self, ui, path) |
7637 | 183 except error.RepoError: |
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184 self._tempparent = tempfile.mkdtemp() |
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185 localrepo.instance(ui, self._tempparent, 1) |
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186 localrepo.localrepository.__init__(self, ui, self._tempparent) |
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187 self.ui.setconfig('phases', 'publish', False) |
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188 |
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189 if path: |
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190 self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename |
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191 else: |
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192 self._url = 'bundle:' + bundlename |
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193 |
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194 self.tempfile = None |
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195 f = util.posixfile(bundlename, "rb") |
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196 self.bundle = changegroup.readbundle(f, bundlename) |
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197 if self.bundle.compressed(): |
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198 fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-", |
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199 suffix=".hg10un", dir=self.path) |
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200 self.tempfile = temp |
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201 fptemp = os.fdopen(fdtemp, 'wb') |
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202 |
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203 try: |
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204 fptemp.write("HG10UN") |
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205 while True: |
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206 chunk = self.bundle.read(2**18) |
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207 if not chunk: |
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208 break |
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209 fptemp.write(chunk) |
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210 finally: |
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211 fptemp.close() |
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212 |
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213 f = util.posixfile(self.tempfile, "rb") |
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214 self.bundle = changegroup.readbundle(f, bundlename) |
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215 |
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216 # dict with the mapping 'filename' -> position in the bundle |
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217 self.bundlefilespos = {} |
5262 | 218 |
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219 @localrepo.unfilteredpropertycache |
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220 def changelog(self): |
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221 # consume the header if it exists |
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222 self.bundle.changelogheader() |
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223 c = bundlechangelog(self.sopener, self.bundle) |
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224 self.manstart = self.bundle.tell() |
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225 return c |
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226 |
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227 @localrepo.unfilteredpropertycache |
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228 def manifest(self): |
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229 self.bundle.seek(self.manstart) |
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230 # consume the header if it exists |
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231 self.bundle.manifestheader() |
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232 m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev) |
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233 self.filestart = self.bundle.tell() |
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234 return m |
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235 |
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236 @localrepo.unfilteredpropertycache |
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237 def manstart(self): |
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238 self.changelog |
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239 return self.manstart |
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240 |
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241 @localrepo.unfilteredpropertycache |
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242 def filestart(self): |
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243 self.manifest |
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244 return self.filestart |
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245 |
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246 def url(self): |
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247 return self._url |
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248 |
1942
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249 def file(self, f): |
5262 | 250 if not self.bundlefilespos: |
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251 self.bundle.seek(self.filestart) |
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252 while True: |
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253 chunkdata = self.bundle.filelogheader() |
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254 if not chunkdata: |
5262 | 255 break |
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256 fname = chunkdata['filename'] |
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257 self.bundlefilespos[fname] = self.bundle.tell() |
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258 while True: |
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259 c = self.bundle.deltachunk(None) |
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260 if not c: |
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261 break |
5262 | 262 |
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263 if f[0] == '/': |
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264 f = f[1:] |
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265 if f in self.bundlefilespos: |
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266 self.bundle.seek(self.bundlefilespos[f]) |
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267 return bundlefilelog(self.sopener, f, self.bundle, |
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268 self.changelog.rev, self) |
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269 else: |
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270 return filelog.filelog(self.sopener, f) |
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271 |
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272 def close(self): |
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273 """Close assigned bundle file immediately.""" |
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274 self.bundle.close() |
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275 if self.tempfile is not None: |
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276 os.unlink(self.tempfile) |
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277 if self._tempparent: |
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278 shutil.rmtree(self._tempparent, True) |
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279 |
6315 | 280 def cancopy(self): |
281 return False | |
282 | |
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283 def peer(self): |
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284 return bundlepeer(self) |
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285 |
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286 def getcwd(self): |
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287 return os.getcwd() # always outside the repo |
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288 |
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289 |
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290 def instance(ui, path, create): |
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291 if create: |
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292 raise util.Abort(_('cannot create new bundle repository')) |
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293 parentpath = ui.config("bundle", "mainreporoot", "") |
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294 if not parentpath: |
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295 # try to find the correct path to the working directory repo |
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296 parentpath = cmdutil.findrepo(os.getcwd()) |
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297 if parentpath is None: |
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298 parentpath = '' |
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299 if parentpath: |
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300 # Try to make the full path relative so we get a nice, short URL. |
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301 # In particular, we don't want temp dir names in test outputs. |
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302 cwd = os.getcwd() |
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303 if parentpath == cwd: |
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304 parentpath = '' |
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305 else: |
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306 cwd = os.path.join(cwd,'') |
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307 if parentpath.startswith(cwd): |
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308 parentpath = parentpath[len(cwd):] |
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309 u = util.url(path) |
13826
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310 path = u.localpath() |
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311 if u.scheme == 'bundle': |
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312 s = path.split("+", 1) |
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313 if len(s) == 1: |
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314 repopath, bundlename = parentpath, s[0] |
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315 else: |
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316 repopath, bundlename = s |
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317 else: |
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318 repopath, bundlename = parentpath, path |
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319 return bundlerepository(ui, repopath, bundlename) |
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320 |
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321 def getremotechanges(ui, repo, other, onlyheads=None, bundlename=None, |
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322 force=False): |
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323 '''obtains a bundle of changes incoming from other |
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324 |
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325 "onlyheads" restricts the returned changes to those reachable from the |
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326 specified heads. |
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327 "bundlename", if given, stores the bundle to this file path permanently; |
14190
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328 otherwise it's stored to a temp file and gets deleted again when you call |
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329 the returned "cleanupfn". |
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330 "force" indicates whether to proceed on unrelated repos. |
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331 |
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332 Returns a tuple (local, csets, cleanupfn): |
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333 |
16683 | 334 "local" is a local repo from which to obtain the actual incoming |
335 changesets; it is a bundlerepo for the obtained bundle when the | |
336 original "other" is remote. | |
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337 "csets" lists the incoming changeset node ids. |
16683 | 338 "cleanupfn" must be called without arguments when you're done processing |
339 the changes; it closes both the original "other" and the one returned | |
340 here. | |
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341 ''' |
16683 | 342 tmp = discovery.findcommonincoming(repo, other, heads=onlyheads, |
343 force=force) | |
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344 common, incoming, rheads = tmp |
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345 if not incoming: |
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346 try: |
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347 if bundlename: |
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348 os.unlink(bundlename) |
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349 except OSError: |
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350 pass |
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351 return repo, [], other.close |
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352 |
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353 bundle = None |
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354 bundlerepo = None |
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355 localrepo = other.local() |
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356 if bundlename or not localrepo: |
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357 # create a bundle (uncompressed if other repo is not local) |
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358 |
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359 if other.capable('getbundle'): |
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360 cg = other.getbundle('incoming', common=common, heads=rheads) |
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361 elif onlyheads is None and not other.capable('changegroupsubset'): |
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362 # compat with older servers when pulling all remote heads |
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363 cg = other.changegroup(incoming, "incoming") |
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364 rheads = None |
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365 else: |
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366 cg = other.changegroupsubset(incoming, rheads, 'incoming') |
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367 bundletype = localrepo and "HG10BZ" or "HG10UN" |
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368 fname = bundle = changegroup.writebundle(cg, bundlename, bundletype) |
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369 # keep written bundle? |
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370 if bundlename: |
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371 bundle = None |
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372 if not localrepo: |
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373 # use the created uncompressed bundlerepo |
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374 localrepo = bundlerepo = bundlerepository(ui, repo.root, fname) |
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375 # this repo contains local and other now, so filter out local again |
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376 common = repo.heads() |
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377 |
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378 csets = localrepo.changelog.findmissing(common, rheads) |
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379 |
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380 def cleanup(): |
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381 if bundlerepo: |
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382 bundlerepo.close() |
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383 if bundle: |
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384 os.unlink(bundle) |
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385 other.close() |
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386 |
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387 return (localrepo, csets, cleanup) |