Mercurial > hg
annotate mercurial/bundlerepo.py @ 17517:15036492a103
spelling: Structured
author | timeless@mozdev.org |
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date | Fri, 17 Aug 2012 13:58:19 -0700 |
parents | 1d710fe5ee0e |
children | 03e552aaae67 8ab0640c3090 |
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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 |
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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 |
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24 # the revision in the bundle (an unbundle object). |
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25 # |
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26 # We store this offset in the index (start), to differentiate a |
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27 # rev in the bundle and from a rev in the revlog, we check |
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28 # len(index[r]). If the tuple is bigger than 7, it is a bundle |
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29 # (it is bigger since we store the node to which the delta is) |
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30 # |
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31 revlog.revlog.__init__(self, opener, indexfile) |
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32 self.bundle = bundle |
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33 self.basemap = {} |
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34 n = len(self) |
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35 chain = None |
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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 continue |
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55 |
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56 for p in (p1, p2): |
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57 if p not in self.nodemap: |
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58 raise error.LookupError(p, self.indexfile, |
7633 | 59 _("unknown parent")) |
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60 # start, size, full unc. size, base (unused), link, p1, p2, node |
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61 e = (revlog.offset_type(start, 0), size, -1, -1, link, |
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62 self.rev(p1), self.rev(p2), node) |
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63 self.basemap[n] = deltabase |
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64 self.index.insert(-1, e) |
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65 self.nodemap[node] = n |
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66 chain = node |
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67 n += 1 |
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68 |
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69 def inbundle(self, rev): |
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70 """is rev from the bundle""" |
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71 if rev < 0: |
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72 return False |
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73 return rev in self.basemap |
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74 def bundlebase(self, rev): |
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75 return self.basemap[rev] |
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76 def _chunk(self, rev): |
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77 # Warning: in case of bundle, the diff is against bundlebase, |
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78 # not against rev - 1 |
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79 # XXX: could use some caching |
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80 if not self.inbundle(rev): |
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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 self.inbundle(rev1) and self.inbundle(rev2): |
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88 # hot path for bundle |
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89 revb = self.rev(self.bundlebase(rev2)) |
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90 if revb == rev1: |
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91 return self._chunk(rev2) |
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92 elif not self.inbundle(rev1) and not self.inbundle(rev2): |
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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 iter_node = node |
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115 # reconstruct the revision if it is from a changegroup |
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116 while self.inbundle(rev): |
4984 | 117 if self._cache and self._cache[0] == iter_node: |
118 text = self._cache[2] | |
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119 break |
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120 chain.append(rev) |
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121 iter_node = self.bundlebase(rev) |
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122 rev = self.rev(iter_node) |
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123 if text is None: |
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124 text = revlog.revlog.revision(self, iter_node) |
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125 |
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126 while chain: |
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127 delta = self._chunk(chain.pop()) |
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128 text = mdiff.patches(text, [delta]) |
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129 |
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130 p1, p2 = self.parents(node) |
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131 if node != revlog.hash(text, p1, p2): |
7633 | 132 raise error.RevlogError(_("integrity check failed on %s:%d") |
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133 % (self.datafile, self.rev(node))) |
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134 |
4984 | 135 self._cache = (node, self.rev(node), text) |
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136 return text |
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137 |
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138 def addrevision(self, text, transaction, link, p1=None, p2=None, d=None): |
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139 raise NotImplementedError |
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140 def addgroup(self, revs, linkmapper, transaction): |
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141 raise NotImplementedError |
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142 def strip(self, rev, minlink): |
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143 raise NotImplementedError |
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144 def checksize(self): |
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145 raise NotImplementedError |
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146 |
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147 class bundlechangelog(bundlerevlog, changelog.changelog): |
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148 def __init__(self, opener, bundle): |
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149 changelog.changelog.__init__(self, opener) |
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150 linkmapper = lambda x: x |
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151 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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152 linkmapper) |
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153 |
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154 class bundlemanifest(bundlerevlog, manifest.manifest): |
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155 def __init__(self, opener, bundle, linkmapper): |
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156 manifest.manifest.__init__(self, opener) |
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157 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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158 linkmapper) |
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159 |
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160 class bundlefilelog(bundlerevlog, filelog.filelog): |
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161 def __init__(self, opener, path, bundle, linkmapper, repo): |
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162 filelog.filelog.__init__(self, opener, path) |
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163 bundlerevlog.__init__(self, opener, self.indexfile, bundle, |
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164 linkmapper) |
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165 self._repo = repo |
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166 |
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167 def _file(self, f): |
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168 self._repo.file(f) |
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169 |
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170 class bundlepeer(localrepo.localpeer): |
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171 def canpush(self): |
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172 return False |
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173 |
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174 class bundlerepository(localrepo.localrepository): |
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175 def __init__(self, ui, path, bundlename): |
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176 self._tempparent = None |
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177 try: |
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178 localrepo.localrepository.__init__(self, ui, path) |
7637 | 179 except error.RepoError: |
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180 self._tempparent = tempfile.mkdtemp() |
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181 localrepo.instance(ui, self._tempparent, 1) |
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182 localrepo.localrepository.__init__(self, ui, self._tempparent) |
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183 self.ui.setconfig('phases', 'publish', False) |
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184 |
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185 if path: |
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186 self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename |
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187 else: |
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188 self._url = 'bundle:' + bundlename |
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189 |
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190 self.tempfile = None |
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191 f = util.posixfile(bundlename, "rb") |
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192 self.bundle = changegroup.readbundle(f, bundlename) |
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193 if self.bundle.compressed(): |
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194 fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-", |
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195 suffix=".hg10un", dir=self.path) |
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196 self.tempfile = temp |
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197 fptemp = os.fdopen(fdtemp, 'wb') |
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198 |
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199 try: |
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200 fptemp.write("HG10UN") |
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201 while True: |
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202 chunk = self.bundle.read(2**18) |
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203 if not chunk: |
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204 break |
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205 fptemp.write(chunk) |
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206 finally: |
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207 fptemp.close() |
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208 |
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209 f = util.posixfile(self.tempfile, "rb") |
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210 self.bundle = changegroup.readbundle(f, bundlename) |
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211 |
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212 # dict with the mapping 'filename' -> position in the bundle |
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213 self.bundlefilespos = {} |
5262 | 214 |
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215 @util.propertycache |
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216 def changelog(self): |
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217 # consume the header if it exists |
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218 self.bundle.changelogheader() |
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219 c = bundlechangelog(self.sopener, self.bundle) |
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220 self.manstart = self.bundle.tell() |
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221 return c |
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222 |
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223 @util.propertycache |
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224 def manifest(self): |
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225 self.bundle.seek(self.manstart) |
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226 # consume the header if it exists |
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227 self.bundle.manifestheader() |
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228 m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev) |
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229 self.filestart = self.bundle.tell() |
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230 return m |
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231 |
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232 @util.propertycache |
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233 def manstart(self): |
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234 self.changelog |
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235 return self.manstart |
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236 |
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237 @util.propertycache |
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238 def filestart(self): |
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239 self.manifest |
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240 return self.filestart |
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241 |
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242 def url(self): |
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243 return self._url |
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244 |
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245 def file(self, f): |
5262 | 246 if not self.bundlefilespos: |
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247 self.bundle.seek(self.filestart) |
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248 while True: |
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249 chunkdata = self.bundle.filelogheader() |
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250 if not chunkdata: |
5262 | 251 break |
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252 fname = chunkdata['filename'] |
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253 self.bundlefilespos[fname] = self.bundle.tell() |
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254 while True: |
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255 c = self.bundle.deltachunk(None) |
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256 if not c: |
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257 break |
5262 | 258 |
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259 if f[0] == '/': |
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260 f = f[1:] |
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261 if f in self.bundlefilespos: |
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262 self.bundle.seek(self.bundlefilespos[f]) |
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263 return bundlefilelog(self.sopener, f, self.bundle, |
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264 self.changelog.rev, self) |
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265 else: |
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266 return filelog.filelog(self.sopener, f) |
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267 |
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268 def close(self): |
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269 """Close assigned bundle file immediately.""" |
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270 self.bundle.close() |
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271 if self.tempfile is not None: |
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272 os.unlink(self.tempfile) |
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273 if self._tempparent: |
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274 shutil.rmtree(self._tempparent, True) |
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275 |
6315 | 276 def cancopy(self): |
277 return False | |
278 | |
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279 def peer(self): |
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280 return bundlepeer(self) |
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281 |
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282 def getcwd(self): |
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283 return os.getcwd() # always outside the repo |
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284 |
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285 def _writebranchcache(self, branches, tip, tiprev): |
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286 # don't overwrite the disk cache with bundle-augmented data |
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287 pass |
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288 |
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289 def instance(ui, path, create): |
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290 if create: |
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291 raise util.Abort(_('cannot create new bundle repository')) |
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292 parentpath = ui.config("bundle", "mainreporoot", "") |
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293 if not parentpath: |
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294 # try to find the correct path to the working directory repo |
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295 parentpath = cmdutil.findrepo(os.getcwd()) |
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296 if parentpath is None: |
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297 parentpath = '' |
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298 if parentpath: |
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299 # Try to make the full path relative so we get a nice, short URL. |
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300 # In particular, we don't want temp dir names in test outputs. |
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301 cwd = os.getcwd() |
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302 if parentpath == cwd: |
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303 parentpath = '' |
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304 else: |
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305 cwd = os.path.join(cwd,'') |
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306 if parentpath.startswith(cwd): |
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307 parentpath = parentpath[len(cwd):] |
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308 u = util.url(path) |
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309 path = u.localpath() |
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310 if u.scheme == 'bundle': |
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311 s = path.split("+", 1) |
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312 if len(s) == 1: |
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313 repopath, bundlename = parentpath, s[0] |
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314 else: |
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315 repopath, bundlename = s |
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316 else: |
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317 repopath, bundlename = parentpath, path |
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318 return bundlerepository(ui, repopath, bundlename) |
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319 |
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320 def getremotechanges(ui, repo, other, onlyheads=None, bundlename=None, |
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321 force=False): |
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322 '''obtains a bundle of changes incoming from other |
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323 |
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324 "onlyheads" restricts the returned changes to those reachable from the |
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325 specified heads. |
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326 "bundlename", if given, stores the bundle to this file path permanently; |
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327 otherwise it's stored to a temp file and gets deleted again when you call |
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328 the returned "cleanupfn". |
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329 "force" indicates whether to proceed on unrelated repos. |
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330 |
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331 Returns a tuple (local, csets, cleanupfn): |
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332 |
16683 | 333 "local" is a local repo from which to obtain the actual incoming |
334 changesets; it is a bundlerepo for the obtained bundle when the | |
335 original "other" is remote. | |
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336 "csets" lists the incoming changeset node ids. |
16683 | 337 "cleanupfn" must be called without arguments when you're done processing |
338 the changes; it closes both the original "other" and the one returned | |
339 here. | |
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340 ''' |
16683 | 341 tmp = discovery.findcommonincoming(repo, other, heads=onlyheads, |
342 force=force) | |
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343 common, incoming, rheads = tmp |
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344 if not incoming: |
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345 try: |
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346 if bundlename: |
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347 os.unlink(bundlename) |
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348 except OSError: |
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349 pass |
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350 return other, [], other.close |
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351 |
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352 bundle = None |
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353 bundlerepo = None |
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354 localrepo = other.local() |
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355 if bundlename or not localrepo: |
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356 # create a bundle (uncompressed if other repo is not local) |
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357 |
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358 if other.capable('getbundle'): |
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359 cg = other.getbundle('incoming', common=common, heads=rheads) |
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360 elif onlyheads is None and not other.capable('changegroupsubset'): |
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361 # compat with older servers when pulling all remote heads |
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362 cg = other.changegroup(incoming, "incoming") |
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363 rheads = None |
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364 else: |
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365 cg = other.changegroupsubset(incoming, rheads, 'incoming') |
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366 bundletype = localrepo and "HG10BZ" or "HG10UN" |
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367 fname = bundle = changegroup.writebundle(cg, bundlename, bundletype) |
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368 # keep written bundle? |
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369 if bundlename: |
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370 bundle = None |
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371 if not localrepo: |
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372 # use the created uncompressed bundlerepo |
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373 localrepo = bundlerepo = bundlerepository(ui, repo.root, fname) |
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374 # this repo contains local and other now, so filter out local again |
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375 common = repo.heads() |
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376 |
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377 csets = localrepo.changelog.findmissing(common, rheads) |
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378 |
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379 def cleanup(): |
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380 if bundlerepo: |
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381 bundlerepo.close() |
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382 if bundle: |
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383 os.unlink(bundle) |
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384 other.close() |
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385 |
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386 return (localrepo, csets, cleanup) |
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387 |