Mercurial > hg
annotate mercurial/repair.py @ 14554:68db17047637
hg: add peer method
author | Matt Mackall <mpm@selenic.com> |
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date | Fri, 10 Jun 2011 11:43:38 -0500 |
parents | e4bfb9c337f3 |
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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 |
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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 |
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149 except: |
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150 if backupfile: |
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151 ui.warn(_("strip failed, full bundle stored in '%s'\n") |
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152 % backupfile) |
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153 elif saveheads: |
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154 ui.warn(_("strip failed, partial bundle stored in '%s'\n") |
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155 % chgrpfile) |
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156 raise |
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157 |
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158 repo.destroyed() |