Mercurial > hg
annotate mercurial/hbisect.py @ 11791:00cde9bddbe4
repair: do not compress partial bundle if we do not keep it on disk
A partial bundle is created to temporarily save revisions > rev but
not descending from the node to strip, to be able to restore the
changesets after stripping the changelog.
Since this bundle is not kept after the strip operation, and is not
user-visible, it is not necessary and should be faster to avoid
compression.
author | Nicolas Dumazet <nicdumz.commits@gmail.com> |
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date | Thu, 12 Aug 2010 16:53:23 +0900 |
parents | 25e572394f5c |
children | c6b1be675d3c |
rev | line source |
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1 # changelog bisection for mercurial |
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2 # |
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3 # Copyright 2007 Matt Mackall |
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4 # Copyright 2005, 2006 Benoit Boissinot <benoit.boissinot@ens-lyon.org> |
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5 # |
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6 # Inspired by git bisect, extension skeleton taken from mq.py. |
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7 # |
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8 # This software may be used and distributed according to the terms of the |
10263 | 9 # GNU General Public License version 2 or any later version. |
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10 |
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11 import os |
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12 from i18n import _ |
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13 from node import short, hex |
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14 import util |
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15 |
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16 def bisect(changelog, state): |
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17 """find the next node (if any) for testing during a bisect search. |
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18 returns a (nodes, number, good) tuple. |
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19 |
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20 'nodes' is the final result of the bisect if 'number' is 0. |
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21 Otherwise 'number' indicates the remaining possible candidates for |
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22 the search and 'nodes' contains the next bisect target. |
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23 'good' is True if bisect is searching for a first good changeset, False |
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24 if searching for a first bad one. |
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25 """ |
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26 |
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28 skip = set([changelog.rev(n) for n in state['skip']]) |
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29 |
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30 def buildancestors(bad, good): |
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31 # only the earliest bad revision matters |
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32 badrev = min([changelog.rev(n) for n in bad]) |
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33 goodrevs = [changelog.rev(n) for n in good] |
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34 goodrev = min(goodrevs) |
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35 # build visit array |
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36 ancestors = [None] * (len(changelog) + 1) # an extra for [-1] |
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37 |
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38 # set nodes descended from goodrev |
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39 ancestors[goodrev] = [] |
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40 for rev in xrange(goodrev + 1, len(changelog)): |
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41 for prev in clparents(rev): |
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42 if ancestors[prev] == []: |
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43 ancestors[rev] = [] |
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44 |
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45 # clear good revs from array |
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46 for node in goodrevs: |
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47 ancestors[node] = None |
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48 for rev in xrange(len(changelog), -1, -1): |
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49 if ancestors[rev] is None: |
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50 for prev in clparents(rev): |
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51 ancestors[prev] = None |
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52 |
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53 if ancestors[badrev] is None: |
5777 | 54 return badrev, None |
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55 return badrev, ancestors |
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56 |
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57 good = 0 |
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58 badrev, ancestors = buildancestors(state['bad'], state['good']) |
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59 if not ancestors: # looking for bad to good transition? |
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60 good = 1 |
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61 badrev, ancestors = buildancestors(state['good'], state['bad']) |
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63 if not ancestors: # now we're confused |
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65 % (badrev, short(bad))) |
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66 |
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67 # build children dict |
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68 children = {} |
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69 visit = [badrev] |
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70 candidates = [] |
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71 while visit: |
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72 rev = visit.pop(0) |
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73 if ancestors[rev] == []: |
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74 candidates.append(rev) |
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75 for prev in clparents(rev): |
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76 if prev != -1: |
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77 if prev in children: |
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78 children[prev].append(rev) |
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79 else: |
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80 children[prev] = [rev] |
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81 visit.append(prev) |
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82 |
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83 candidates.sort() |
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84 # have we narrowed it down to one entry? |
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85 # or have all other possible candidates besides 'bad' have been skipped? |
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86 tot = len(candidates) |
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87 unskipped = [c for c in candidates if (c not in skip) and (c != badrev)] |
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88 if tot == 1 or not unskipped: |
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89 return ([changelog.node(rev) for rev in candidates], 0, good) |
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90 perfect = tot // 2 |
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91 |
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92 # find the best node to test |
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93 best_rev = None |
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94 best_len = -1 |
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95 poison = set() |
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96 for rev in candidates: |
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97 if rev in poison: |
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98 # poison children |
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99 poison.update(children.get(rev, [])) |
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100 continue |
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101 |
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102 a = ancestors[rev] or [rev] |
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103 ancestors[rev] = None |
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104 |
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105 x = len(a) # number of ancestors |
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106 y = tot - x # number of non-ancestors |
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107 value = min(x, y) # how good is this test? |
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108 if value > best_len and rev not in skip: |
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109 best_len = value |
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110 best_rev = rev |
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111 if value == perfect: # found a perfect candidate? quit early |
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112 break |
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113 |
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114 if y < perfect and rev not in skip: # all downhill from here? |
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115 # poison children |
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116 poison.update(children.get(rev, [])) |
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117 continue |
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118 |
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119 for c in children.get(rev, []): |
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120 if ancestors[c]: |
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121 ancestors[c] = list(set(ancestors[c] + a)) |
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122 else: |
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123 ancestors[c] = a + [c] |
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124 |
5737 | 125 assert best_rev is not None |
126 best_node = changelog.node(best_rev) | |
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127 |
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128 return ([best_node], tot, good) |
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129 |
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130 |
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131 def load_state(repo): |
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132 state = {'good': [], 'bad': [], 'skip': []} |
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133 if os.path.exists(repo.join("bisect.state")): |
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134 for l in repo.opener("bisect.state"): |
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135 kind, node = l[:-1].split() |
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136 node = repo.lookup(node) |
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137 if kind not in state: |
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138 raise util.Abort(_("unknown bisect kind %s") % kind) |
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139 state[kind].append(node) |
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140 return state |
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141 |
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142 |
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143 def save_state(repo, state): |
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144 f = repo.opener("bisect.state", "w", atomictemp=True) |
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145 wlock = repo.wlock() |
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146 try: |
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147 for kind in state: |
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148 for node in state[kind]: |
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149 f.write("%s %s\n" % (kind, hex(node))) |
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150 f.rename() |
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151 finally: |
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152 wlock.release() |
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153 |