annotate mercurial/repair.py @ 16745:27b2e1823e83

branchcache: backout 0311a6abd38a
author Matt Mackall <mpm@selenic.com>
date Thu, 17 May 2012 15:34:59 -0500
parents 0311a6abd38a
children 1093ad1e8903
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1 # repair.py - functions for repository repair for mercurial
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2 #
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3 # Copyright 2005, 2006 Chris Mason <mason@suse.com>
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4 # Copyright 2007 Matt Mackall
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5 #
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6 # This software may be used and distributed according to the terms of the
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7 # GNU General Public License version 2 or any later version.
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8
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9 from mercurial import changegroup, bookmarks
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10 from mercurial.node import short
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11 from mercurial.i18n import _
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12 import os
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13 import errno
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14
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15 def _bundle(repo, bases, heads, node, suffix, compress=True):
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16 """create a bundle with the specified revisions as a backup"""
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17 cg = repo.changegroupsubset(bases, heads, 'strip')
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18 backupdir = repo.join("strip-backup")
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19 if not os.path.isdir(backupdir):
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20 os.mkdir(backupdir)
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21 name = os.path.join(backupdir, "%s-%s.hg" % (short(node), suffix))
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22 if compress:
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23 bundletype = "HG10BZ"
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24 else:
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25 bundletype = "HG10UN"
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26 return changegroup.writebundle(cg, name, bundletype)
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27
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28 def _collectfiles(repo, striprev):
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29 """find out the filelogs affected by the strip"""
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30 files = set()
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31
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32 for x in xrange(striprev, len(repo)):
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33 files.update(repo[x].files())
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34
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35 return sorted(files)
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36
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37 def _collectbrokencsets(repo, files, striprev):
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38 """return the changesets which will be broken by the truncation"""
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39 s = set()
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40 def collectone(revlog):
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41 linkgen = (revlog.linkrev(i) for i in revlog)
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42 # find the truncation point of the revlog
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43 for lrev in linkgen:
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44 if lrev >= striprev:
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45 break
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46 # see if any revision after this point has a linkrev
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47 # less than striprev (those will be broken by strip)
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48 for lrev in linkgen:
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49 if lrev < striprev:
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50 s.add(lrev)
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51
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52 collectone(repo.manifest)
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53 for fname in files:
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54 collectone(repo.file(fname))
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55
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56 return s
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57
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58 def strip(ui, repo, nodelist, backup="all", topic='backup'):
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59 cl = repo.changelog
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60 # TODO handle undo of merge sets
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61 if isinstance(nodelist, str):
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62 nodelist = [nodelist]
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63 striplist = [cl.rev(node) for node in nodelist]
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64 striprev = min(striplist)
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65
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66 keeppartialbundle = backup == 'strip'
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67
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68 # Some revisions with rev > striprev may not be descendants of striprev.
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69 # We have to find these revisions and put them in a bundle, so that
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70 # we can restore them after the truncations.
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71 # To create the bundle we use repo.changegroupsubset which requires
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72 # the list of heads and bases of the set of interesting revisions.
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73 # (head = revision in the set that has no descendant in the set;
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74 # base = revision in the set that has no ancestor in the set)
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75 tostrip = set(striplist)
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76 for rev in striplist:
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77 for desc in cl.descendants(rev):
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78 tostrip.add(desc)
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79
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80 files = _collectfiles(repo, striprev)
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81 saverevs = _collectbrokencsets(repo, files, striprev)
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82
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83 # compute heads
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84 saveheads = set(saverevs)
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85 for r in xrange(striprev + 1, len(cl)):
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86 if r not in tostrip:
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87 saverevs.add(r)
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88 saveheads.difference_update(cl.parentrevs(r))
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89 saveheads.add(r)
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90 saveheads = [cl.node(r) for r in saveheads]
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91
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92 # compute base nodes
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93 if saverevs:
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94 descendants = set(cl.descendants(*saverevs))
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95 saverevs.difference_update(descendants)
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96 savebases = [cl.node(r) for r in saverevs]
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97 stripbases = [cl.node(r) for r in tostrip]
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98
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99 bm = repo._bookmarks
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100 updatebm = []
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101 for m in bm:
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102 rev = repo[bm[m]].rev()
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103 if rev in tostrip:
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104 updatebm.append(m)
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105
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106 # create a changegroup for all the branches we need to keep
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107 backupfile = None
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108 if backup == "all":
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109 backupfile = _bundle(repo, stripbases, cl.heads(), node, topic)
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110 repo.ui.status(_("saved backup bundle to %s\n") % backupfile)
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111 if saveheads or savebases:
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112 # do not compress partial bundle if we remove it from disk later
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113 chgrpfile = _bundle(repo, savebases, saveheads, node, 'temp',
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114 compress=keeppartialbundle)
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115
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116 mfst = repo.manifest
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117
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118 tr = repo.transaction("strip")
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119 offset = len(tr.entries)
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120
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121 try:
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122 tr.startgroup()
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123 cl.strip(striprev, tr)
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124 mfst.strip(striprev, tr)
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125 for fn in files:
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126 repo.file(fn).strip(striprev, tr)
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127 tr.endgroup()
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128
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129 try:
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130 for i in xrange(offset, len(tr.entries)):
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131 file, troffset, ignore = tr.entries[i]
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132 repo.sopener(file, 'a').truncate(troffset)
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133 tr.close()
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134 except: # re-raises
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135 tr.abort()
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136 raise
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parents: 10881
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137
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parents: 15068
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138 if saveheads or savebases:
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139 ui.note(_("adding branch\n"))
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140 f = open(chgrpfile, "rb")
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141 gen = changegroup.readbundle(f, chgrpfile)
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142 if not repo.ui.verbose:
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parents: 11200
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143 # silence internal shuffling chatter
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144 repo.ui.pushbuffer()
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145 repo.addchangegroup(gen, 'strip', 'bundle:' + chgrpfile, True)
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146 if not repo.ui.verbose:
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147 repo.ui.popbuffer()
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148 f.close()
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Nicolas Dumazet <nicdumz.commits@gmail.com>
parents: 11600
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149 if not keeppartialbundle:
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150 os.unlink(chgrpfile)
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151
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parents: 15901
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152 # remove undo files
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153 for undofile in repo.undofiles():
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parents: 15901
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154 try:
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Idan Kamara <idankk86@gmail.com>
parents: 15901
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155 os.unlink(undofile)
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parents: 15901
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156 except OSError, e:
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Idan Kamara <idankk86@gmail.com>
parents: 15901
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157 if e.errno != errno.ENOENT:
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Idan Kamara <idankk86@gmail.com>
parents: 15901
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158 ui.warn(_('error removing %s: %s\n') % (undofile, str(e)))
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parents: 15901
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159
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parents: 12057
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160 for m in updatebm:
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parents: 12057
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161 bm[m] = repo['.'].node()
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parents: 12057
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162 bookmarks.write(repo)
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parents: 16628
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163 except: # re-raises
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164 if backupfile:
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Martin Geisler <mg@lazybytes.net>
parents: 11333
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165 ui.warn(_("strip failed, full bundle stored in '%s'\n")
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parents: 11333
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166 % backupfile)
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167 elif saveheads:
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parents: 11333
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168 ui.warn(_("strip failed, partial bundle stored in '%s'\n")
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parents: 10881
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169 % chgrpfile)
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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170 raise
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parents:
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171
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parents: 16716
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172 repo.destroyed()