Mercurial > public > mercurial-scm > hg

annotate mercurial/repair.py @ 8462:e7e4e41b3bbc

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repair: use set instead of dict
author Benoit Boissinot <benoit.boissinot@ens-lyon.org>
date Sun, 17 May 2009 03:38:03 +0200
parents c8e81f557da7
children 3e16c0fc2241
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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, incorporated herein by reference.
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8
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9 import changegroup
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10 from node import nullrev, short
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11 from i18n import _
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12 import os
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13
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14 def _bundle(repo, bases, heads, node, suffix, extranodes=None):
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15 """create a bundle with the specified revisions as a backup"""
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16 cg = repo.changegroupsubset(bases, heads, 'strip', extranodes)
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17 backupdir = repo.join("strip-backup")
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18 if not os.path.isdir(backupdir):
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19 os.mkdir(backupdir)
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20 name = os.path.join(backupdir, "%s-%s" % (short(node), suffix))
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21 repo.ui.warn(_("saving bundle to %s\n") % name)
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22 return changegroup.writebundle(cg, name, "HG10BZ")
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23
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24 def _collectfiles(repo, striprev):
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25 """find out the filelogs affected by the strip"""
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26 files = set()
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27
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28 for x in xrange(striprev, len(repo)):
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29 for name in repo[x].files():
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30 if name in files:
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31 continue
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32 files.add(name)
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33
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34 return sorted(files)
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35
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36 def _collectextranodes(repo, files, link):
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37 """return the nodes that have to be saved before the strip"""
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38 def collectone(revlog):
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39 extra = []
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40 startrev = count = len(revlog)
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41 # find the truncation point of the revlog
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42 for i in xrange(0, count):
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43 lrev = revlog.linkrev(i)
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44 if lrev >= link:
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45 startrev = i + 1
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46 break
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47
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48 # see if any revision after that point has a linkrev less than link
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49 # (we have to manually save these guys)
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50 for i in xrange(startrev, count):
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51 node = revlog.node(i)
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52 lrev = revlog.linkrev(i)
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53 if lrev < link:
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54 extra.append((node, cl.node(lrev)))
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55
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56 return extra
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57
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58 extranodes = {}
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59 cl = repo.changelog
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60 extra = collectone(repo.manifest)
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61 if extra:
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62 extranodes[1] = extra
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63 for fname in files:
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64 f = repo.file(fname)
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65 extra = collectone(f)
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66 if extra:
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67 extranodes[fname] = extra
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68
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69 return extranodes
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70
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71 def strip(ui, repo, node, backup="all"):
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72 cl = repo.changelog
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73 # TODO delete the undo files, and handle undo of merge sets
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74 striprev = cl.rev(node)
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75
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76 # Some revisions with rev > striprev may not be descendants of striprev.
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77 # We have to find these revisions and put them in a bundle, so that
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78 # we can restore them after the truncations.
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79 # To create the bundle we use repo.changegroupsubset which requires
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80 # the list of heads and bases of the set of interesting revisions.
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81 # (head = revision in the set that has no descendant in the set;
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82 # base = revision in the set that has no ancestor in the set)
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83 tostrip = set((striprev,))
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84 saveheads = set()
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85 savebases = []
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86 for r in xrange(striprev + 1, len(cl)):
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87 parents = cl.parentrevs(r)
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88 if parents[0] in tostrip or parents[1] in tostrip:
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89 # r is a descendant of striprev
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90 tostrip.add(r)
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91 # if this is a merge and one of the parents does not descend
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92 # from striprev, mark that parent as a savehead.
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93 if parents[1] != nullrev:
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94 for p in parents:
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95 if p not in tostrip and p > striprev:
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96 saveheads.add(p)
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97 else:
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98 # if no parents of this revision will be stripped, mark it as
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99 # a savebase
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100 if parents[0] < striprev and parents[1] < striprev:
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101 savebases.append(cl.node(r))
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102
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103 for p in parents:
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104 saveheads.discard(p)
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105 saveheads.add(r)
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106
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107 saveheads = [cl.node(r) for r in saveheads]
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108 files = _collectfiles(repo, striprev)
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109
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110 extranodes = _collectextranodes(repo, files, striprev)
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111
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112 # create a changegroup for all the branches we need to keep
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113 if backup == "all":
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114 _bundle(repo, [node], cl.heads(), node, 'backup')
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115 if saveheads or extranodes:
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116 chgrpfile = _bundle(repo, savebases, saveheads, node, 'temp',
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117 extranodes)
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118
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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119 fs = [repo.file(name) for name in files]
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parents: 7361
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120 mfst = repo.manifest
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parents: 7361
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121
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parents: 7361
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122 tr = repo.transaction()
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parents: 7361
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123 offset = len(tr.entries)
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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124
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Henrik Stuart <hg@hstuart.dk>
parents: 8312
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125 tr.startgroup()
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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126 cl.strip(striprev, tr)
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parents: 7361
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127 mfst.strip(striprev, tr)
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parents: 7361
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128 for f in fs:
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parents: 7361
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129 f.strip(striprev, tr)
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Henrik Stuart <hg@hstuart.dk>
parents: 8312
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130 tr.endgroup()
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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131
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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132 try:
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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133 for i in xrange(offset, len(tr.entries)):
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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134 file, troffset, ignore = tr.entries[i]
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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135 repo.sopener(file, 'a').truncate(troffset)
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parents: 7361
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136 tr.close()
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parents: 7361
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137 except:
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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138 tr.abort()
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Henrik Stuart <henrik.stuart@edlund.dk>
parents: 7361
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139 raise
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Matt Mackall <mpm@selenic.com>
parents:
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140
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 5905
diff changeset
141 if saveheads or extranodes:
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Martin Geisler <mg@daimi.au.dk>
parents: 6750
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142 ui.status(_("adding branch\n"))
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4702
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143 f = open(chgrpfile, "rb")
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4702
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144 gen = changegroup.readbundle(f, chgrpfile)
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 5905
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145 repo.addchangegroup(gen, 'strip', 'bundle:' + chgrpfile, True)
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents: 4702
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146 f.close()
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Matt Mackall <mpm@selenic.com>
parents:
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147 if backup != "strip":
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Matt Mackall <mpm@selenic.com>
parents:
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148 os.unlink(chgrpfile)
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Matt Mackall <mpm@selenic.com>
parents:
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149