Mercurial > hg
annotate mercurial/repair.py @ 15621:013688350c7d
bookmarks: update and updatecurrentbookmark return status
This makes bookmarks.update() and bookmarks.updatecurrentbookmark() return
True or False to indicate whether the bookmark was updated or not. This allows
callers to e.g. abort if the update failed.
author | Kevin Bullock <kbullock@ringworld.org> |
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date | Wed, 16 Nov 2011 15:29:57 -0600 |
parents | abcaaf51d568 |
children | 73c4b3d0c711 |
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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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8 |
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9 from mercurial import changegroup, bookmarks, phases |
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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 |
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14 def _bundle(repo, bases, heads, node, suffix, compress=True): |
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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') |
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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.hg" % (short(node), suffix)) |
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21 if compress: |
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22 bundletype = "HG10BZ" |
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23 else: |
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24 bundletype = "HG10UN" |
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25 return changegroup.writebundle(cg, name, bundletype) |
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26 |
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27 def _collectfiles(repo, striprev): |
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28 """find out the filelogs affected by the strip""" |
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29 files = set() |
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30 |
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31 for x in xrange(striprev, len(repo)): |
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32 files.update(repo[x].files()) |
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33 |
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34 return sorted(files) |
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35 |
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36 def _collectbrokencsets(repo, files, striprev): |
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37 """return the changesets which will be broken by the truncation""" |
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38 s = set() |
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39 def collectone(revlog): |
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40 links = (revlog.linkrev(i) for i in revlog) |
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41 # find the truncation point of the revlog |
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42 for lrev in links: |
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43 if lrev >= striprev: |
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44 break |
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45 # see if any revision after this point has a linkrev |
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46 # less than striprev (those will be broken by strip) |
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47 for lrev in links: |
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48 if lrev < striprev: |
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49 s.add(lrev) |
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50 |
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51 collectone(repo.manifest) |
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52 for fname in files: |
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53 collectone(repo.file(fname)) |
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54 |
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55 return s |
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56 |
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57 def strip(ui, repo, node, backup="all"): |
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58 cl = repo.changelog |
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59 # TODO delete the undo files, and handle undo of merge sets |
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60 striprev = cl.rev(node) |
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61 |
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62 keeppartialbundle = backup == 'strip' |
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63 |
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64 # Some revisions with rev > striprev may not be descendants of striprev. |
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65 # We have to find these revisions and put them in a bundle, so that |
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66 # we can restore them after the truncations. |
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67 # To create the bundle we use repo.changegroupsubset which requires |
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68 # the list of heads and bases of the set of interesting revisions. |
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69 # (head = revision in the set that has no descendant in the set; |
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70 # base = revision in the set that has no ancestor in the set) |
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71 tostrip = set(cl.descendants(striprev)) |
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72 tostrip.add(striprev) |
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73 |
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74 files = _collectfiles(repo, striprev) |
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75 saverevs = _collectbrokencsets(repo, files, striprev) |
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76 |
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77 # compute heads |
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78 saveheads = set(saverevs) |
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79 for r in xrange(striprev + 1, len(cl)): |
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80 if r not in tostrip: |
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81 saverevs.add(r) |
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82 saveheads.difference_update(cl.parentrevs(r)) |
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83 saveheads.add(r) |
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84 saveheads = [cl.node(r) for r in saveheads] |
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85 |
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86 # compute base nodes |
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87 if saverevs: |
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88 descendants = set(cl.descendants(*saverevs)) |
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89 saverevs.difference_update(descendants) |
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90 savebases = [cl.node(r) for r in saverevs] |
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91 |
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92 bm = repo._bookmarks |
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93 updatebm = [] |
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94 for m in bm: |
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95 rev = repo[bm[m]].rev() |
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96 if rev in tostrip: |
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97 updatebm.append(m) |
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98 |
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99 # create a changegroup for all the branches we need to keep |
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100 backupfile = None |
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101 if backup == "all": |
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102 backupfile = _bundle(repo, [node], cl.heads(), node, 'backup') |
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103 repo.ui.status(_("saved backup bundle to %s\n") % backupfile) |
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104 if saveheads or savebases: |
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105 # do not compress partial bundle if we remove it from disk later |
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106 chgrpfile = _bundle(repo, savebases, saveheads, node, 'temp', |
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107 compress=keeppartialbundle) |
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108 |
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109 mfst = repo.manifest |
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110 |
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111 tr = repo.transaction("strip") |
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112 offset = len(tr.entries) |
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113 |
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114 try: |
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115 tr.startgroup() |
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116 cl.strip(striprev, tr) |
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117 mfst.strip(striprev, tr) |
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118 for fn in files: |
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119 repo.file(fn).strip(striprev, tr) |
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120 tr.endgroup() |
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121 |
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122 try: |
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123 for i in xrange(offset, len(tr.entries)): |
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124 file, troffset, ignore = tr.entries[i] |
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125 repo.sopener(file, 'a').truncate(troffset) |
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126 tr.close() |
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127 except: |
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128 tr.abort() |
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129 raise |
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130 |
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131 if saveheads or savebases: |
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132 ui.note(_("adding branch\n")) |
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133 f = open(chgrpfile, "rb") |
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134 gen = changegroup.readbundle(f, chgrpfile) |
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135 if not repo.ui.verbose: |
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136 # silence internal shuffling chatter |
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137 repo.ui.pushbuffer() |
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138 repo.addchangegroup(gen, 'strip', 'bundle:' + chgrpfile, True) |
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139 if not repo.ui.verbose: |
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140 repo.ui.popbuffer() |
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141 f.close() |
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142 if not keeppartialbundle: |
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143 os.unlink(chgrpfile) |
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144 |
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145 for m in updatebm: |
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146 bm[m] = repo['.'].node() |
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147 bookmarks.write(repo) |
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148 # remove potential unknown phase |
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149 # XXX using to_strip data would be faster |
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150 phases.filterunknown(repo) |
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151 except: |
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152 if backupfile: |
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153 ui.warn(_("strip failed, full bundle stored in '%s'\n") |
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154 % backupfile) |
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155 elif saveheads: |
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156 ui.warn(_("strip failed, partial bundle stored in '%s'\n") |
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157 % chgrpfile) |
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158 raise |
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159 |
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160 repo.destroyed() |