Mercurial > hg
annotate mercurial/repair.py @ 7983:7b813bdbd5d0
Change double spaces to single spaces in help texts.
author | Martin Geisler <mg@daimi.au.dk> |
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date | Sat, 04 Apr 2009 21:09:43 +0200 |
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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 |
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7 # of the GNU General Public License, incorporated herein by reference. |
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8 |
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9 import changegroup, os |
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10 from node import nullrev, short |
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11 from i18n import _ |
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12 |
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13 def _bundle(repo, bases, heads, node, suffix, extranodes=None): |
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14 """create a bundle with the specified revisions as a backup""" |
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15 cg = repo.changegroupsubset(bases, heads, 'strip', extranodes) |
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16 backupdir = repo.join("strip-backup") |
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17 if not os.path.isdir(backupdir): |
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18 os.mkdir(backupdir) |
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19 name = os.path.join(backupdir, "%s-%s" % (short(node), suffix)) |
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20 repo.ui.warn(_("saving bundle to %s\n") % name) |
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21 return changegroup.writebundle(cg, name, "HG10BZ") |
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22 |
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23 def _collectfiles(repo, striprev): |
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24 """find out the filelogs affected by the strip""" |
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25 files = {} |
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26 |
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27 for x in xrange(striprev, len(repo)): |
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28 for name in repo[x].files(): |
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29 if name in files: |
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30 continue |
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31 files[name] = 1 |
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32 |
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33 files = files.keys() |
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34 files.sort() |
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35 return files |
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36 |
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37 def _collectextranodes(repo, files, link): |
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38 """return the nodes that have to be saved before the strip""" |
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39 def collectone(revlog): |
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40 extra = [] |
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41 startrev = count = len(revlog) |
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42 # find the truncation point of the revlog |
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43 for i in xrange(0, count): |
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44 lrev = revlog.linkrev(i) |
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45 if lrev >= link: |
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46 startrev = i + 1 |
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47 break |
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48 |
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49 # see if any revision after that point has a linkrev less than link |
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50 # (we have to manually save these guys) |
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51 for i in xrange(startrev, count): |
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52 node = revlog.node(i) |
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53 lrev = revlog.linkrev(i) |
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54 if lrev < link: |
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55 extra.append((node, cl.node(lrev))) |
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56 |
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57 return extra |
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58 |
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59 extranodes = {} |
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60 cl = repo.changelog |
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61 extra = collectone(repo.manifest) |
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62 if extra: |
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63 extranodes[1] = extra |
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64 for fname in files: |
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65 f = repo.file(fname) |
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66 extra = collectone(f) |
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67 if extra: |
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68 extranodes[fname] = extra |
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69 |
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70 return extranodes |
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71 |
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72 def strip(ui, repo, node, backup="all"): |
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73 cl = repo.changelog |
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74 # TODO delete the undo files, and handle undo of merge sets |
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75 striprev = cl.rev(node) |
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76 |
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77 # Some revisions with rev > striprev may not be descendants of striprev. |
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78 # We have to find these revisions and put them in a bundle, so that |
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79 # we can restore them after the truncations. |
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80 # To create the bundle we use repo.changegroupsubset which requires |
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81 # the list of heads and bases of the set of interesting revisions. |
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82 # (head = revision in the set that has no descendant in the set; |
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83 # base = revision in the set that has no ancestor in the set) |
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84 tostrip = {striprev: 1} |
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85 saveheads = {} |
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86 savebases = [] |
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87 for r in xrange(striprev + 1, len(cl)): |
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88 parents = cl.parentrevs(r) |
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89 if parents[0] in tostrip or parents[1] in tostrip: |
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90 # r is a descendant of striprev |
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91 tostrip[r] = 1 |
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92 # if this is a merge and one of the parents does not descend |
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93 # from striprev, mark that parent as a savehead. |
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94 if parents[1] != nullrev: |
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95 for p in parents: |
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96 if p not in tostrip and p > striprev: |
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97 saveheads[p] = 1 |
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98 else: |
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99 # if no parents of this revision will be stripped, mark it as |
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100 # a savebase |
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101 if parents[0] < striprev and parents[1] < striprev: |
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102 savebases.append(cl.node(r)) |
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103 |
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104 for p in parents: |
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105 if p in saveheads: |
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106 del saveheads[p] |
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107 saveheads[r] = 1 |
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108 |
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109 saveheads = [cl.node(r) for r in saveheads] |
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110 files = _collectfiles(repo, striprev) |
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111 |
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112 extranodes = _collectextranodes(repo, files, striprev) |
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113 |
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114 # create a changegroup for all the branches we need to keep |
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115 if backup == "all": |
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116 _bundle(repo, [node], cl.heads(), node, 'backup') |
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117 if saveheads or extranodes: |
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118 chgrpfile = _bundle(repo, savebases, saveheads, node, 'temp', |
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119 extranodes) |
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120 |
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121 cl.strip(striprev) |
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122 repo.manifest.strip(striprev) |
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123 for name in files: |
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124 f = repo.file(name) |
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125 f.strip(striprev) |
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126 |
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127 if saveheads or extranodes: |
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128 ui.status(_("adding branch\n")) |
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129 f = open(chgrpfile, "rb") |
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130 gen = changegroup.readbundle(f, chgrpfile) |
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131 repo.addchangegroup(gen, 'strip', 'bundle:' + chgrpfile, True) |
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132 f.close() |
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133 if backup != "strip": |
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134 os.unlink(chgrpfile) |
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135 |