Mercurial > hg
annotate mercurial/repair.py @ 15292:7fa471248185 stable
discovery: Fix error print mentioning a 'None' branch
When talking to old server discovery use heads of the 'None' branch to refer to
topological heads. This use of None should never make it to the end user.
author | Pierre-Yves David <pierre-yves.david@logilab.fr> |
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date | Mon, 17 Oct 2011 11:37:59 +0200 |
parents | 73307643a09f |
children | 6051d8e7e133 |
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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, cg, node, suffix, compress=True): |
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15 """create a bundle with the specified revisions as a backup""" |
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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.hg" % (short(node), suffix)) |
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20 if compress: |
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21 bundletype = "HG10BZ" |
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22 else: |
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23 bundletype = "HG10UN" |
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24 return changegroup.writebundle(cg, name, bundletype) |
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25 |
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26 def _collectfiles(repo, striprev): |
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27 """find out the filelogs affected by the strip""" |
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28 files = set() |
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29 |
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30 for x in xrange(striprev, len(repo)): |
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31 files.update(repo[x].files()) |
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32 |
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33 return sorted(files) |
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34 |
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35 def _collectbrokencsets(repo, files, striprev): |
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36 """return the changesets which will be broken by the truncation""" |
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37 s = set() |
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38 def collectone(revlog): |
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39 links = (revlog.linkrev(i) for i in revlog) |
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40 # find the truncation point of the revlog |
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41 for lrev in links: |
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42 if lrev >= striprev: |
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43 break |
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44 # see if any revision after this point has a linkrev |
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45 # less than striprev (those will be broken by strip) |
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46 for lrev in links: |
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47 if lrev < striprev: |
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48 s.add(lrev) |
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49 |
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50 collectone(repo.manifest) |
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51 for fname in files: |
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52 collectone(repo.file(fname)) |
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53 |
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54 return s |
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55 |
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56 def strip(ui, repo, node, backup="all"): |
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57 cl = repo.changelog |
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58 # TODO delete the undo files, and handle undo of merge sets |
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59 striprev = cl.rev(node) |
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60 |
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61 keeppartialbundle = backup == 'strip' |
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62 |
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63 # Some revisions with rev > striprev may not be descendants of striprev. |
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64 # We have to find these revisions and put them in a bundle, so that |
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65 # we can restore them after the truncations. |
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66 # To create the bundle we use repo.changegroupsubset which requires |
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67 # the list of heads and bases of the set of interesting revisions. |
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68 # (head = revision in the set that has no descendant in the set; |
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69 # base = revision in the set that has no ancestor in the set) |
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70 tostrip = set(cl.descendants(striprev)) |
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71 tostrip.add(striprev) |
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72 |
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73 files = _collectfiles(repo, striprev) |
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74 saverevs = _collectbrokencsets(repo, files, striprev) |
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75 |
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76 # compute heads |
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77 saveheads = set(saverevs) |
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78 for r in xrange(striprev + 1, len(cl)): |
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79 if r not in tostrip: |
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80 saverevs.add(r) |
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81 saveheads.difference_update(cl.parentrevs(r)) |
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82 saveheads.add(r) |
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83 saveheads = [cl.node(r) for r in saveheads] |
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84 |
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85 # compute common nodes |
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86 savecommon = set(cl.node(p) for r in saverevs for p in cl.parentrevs(r) |
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87 if p not in saverevs and p not in tostrip) |
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88 |
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89 bm = repo._bookmarks |
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90 updatebm = [] |
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91 for m in bm: |
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92 rev = repo[bm[m]].rev() |
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93 if rev in tostrip: |
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94 updatebm.append(m) |
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95 |
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96 # create a changegroup for all the branches we need to keep |
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97 backupfile = None |
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98 if backup == "all": |
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99 allnodes=[cl.node(r) for r in xrange(striprev, len(cl))] |
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100 cg = repo._changegroup(allnodes, 'strip') |
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101 backupfile = _bundle(repo, cg, node, 'backup') |
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102 repo.ui.status(_("saved backup bundle to %s\n") % backupfile) |
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103 if saveheads or savecommon: |
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104 # do not compress partial bundle if we remove it from disk later |
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105 cg = repo.getbundle('strip', common=savecommon, heads=saveheads) |
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106 chgrpfile = _bundle(repo, cg, node, 'temp', compress=keeppartialbundle) |
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107 |
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108 mfst = repo.manifest |
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109 |
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110 tr = repo.transaction("strip") |
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111 offset = len(tr.entries) |
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112 |
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113 try: |
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114 tr.startgroup() |
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115 cl.strip(striprev, tr) |
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116 mfst.strip(striprev, tr) |
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117 for fn in files: |
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118 repo.file(fn).strip(striprev, tr) |
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119 tr.endgroup() |
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120 |
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121 try: |
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122 for i in xrange(offset, len(tr.entries)): |
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123 file, troffset, ignore = tr.entries[i] |
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124 repo.sopener(file, 'a').truncate(troffset) |
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125 tr.close() |
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126 except: |
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127 tr.abort() |
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128 raise |
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129 |
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130 if saveheads or savecommon: |
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131 ui.note(_("adding branch\n")) |
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132 f = open(chgrpfile, "rb") |
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133 gen = changegroup.readbundle(f, chgrpfile) |
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134 if not repo.ui.verbose: |
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135 # silence internal shuffling chatter |
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136 repo.ui.pushbuffer() |
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137 repo.addchangegroup(gen, 'strip', 'bundle:' + chgrpfile, True) |
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138 if not repo.ui.verbose: |
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139 repo.ui.popbuffer() |
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140 f.close() |
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141 if not keeppartialbundle: |
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142 os.unlink(chgrpfile) |
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143 |
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144 for m in updatebm: |
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145 bm[m] = repo['.'].node() |
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146 bookmarks.write(repo) |
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147 |
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148 except: |
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149 if backupfile: |
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150 ui.warn(_("strip failed, full bundle stored in '%s'\n") |
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151 % backupfile) |
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152 elif saveheads: |
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153 ui.warn(_("strip failed, partial bundle stored in '%s'\n") |
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154 % chgrpfile) |
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155 raise |
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156 |
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157 repo.destroyed() |