annotate mercurial/hbisect.py @ 16551:ebf6d38c9063 stable

localrepo: add setparents() to adjust dirstate copies (issue3407) The fix introduced in eab9119c5dee was only partially successful. It is correct to turn dirstate 'm' merge records into normal/dirty ones but copy records are lost in the process. To adjust them as well, we need to look in the first parent manifest to know which files were added and preserve only related records. But the dirstate does not have access to changesets, the logic has to moved at another level, in localrepo.
author Patrick Mezard <patrick@mezard.eu>
date Sun, 29 Apr 2012 22:25:55 +0200
parents 1f677c7e494d
children 14913fcb30c6
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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
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9 # GNU General Public License version 2 or any later version.
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10
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f19de58af225 revset.bisect: move bisect() code to hbisect.py
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11 import os, error
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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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27 clparents = changelog.parentrevs
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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 goodrevs
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39 for rev in goodrevs:
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40 ancestors[rev] = []
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41 for rev in xrange(goodrev + 1, len(changelog)):
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42 for prev in clparents(rev):
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43 if ancestors[prev] == []:
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44 ancestors[rev] = []
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45
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46 # clear good revs from array
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47 for rev in goodrevs:
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48 ancestors[rev] = None
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49 for rev in xrange(len(changelog), goodrev, -1):
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50 if ancestors[rev] is None:
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51 for prev in clparents(rev):
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52 ancestors[prev] = None
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53
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54 if ancestors[badrev] is None:
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55 return badrev, None
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56 return badrev, ancestors
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57
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58 good = False
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59 badrev, ancestors = buildancestors(state['bad'], state['good'])
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60 if not ancestors: # looking for bad to good transition?
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61 good = True
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62 badrev, ancestors = buildancestors(state['good'], state['bad'])
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63 bad = changelog.node(badrev)
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64 if not ancestors: # now we're confused
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65 if len(state['bad']) == 1 and len(state['good']) == 1:
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66 raise util.Abort(_("starting revisions are not directly related"))
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67 raise util.Abort(_("inconsistent state, %s:%s is good and bad")
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68 % (badrev, short(bad)))
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69
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70 # build children dict
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71 children = {}
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72 visit = [badrev]
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73 candidates = []
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74 while visit:
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75 rev = visit.pop(0)
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76 if ancestors[rev] == []:
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77 candidates.append(rev)
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78 for prev in clparents(rev):
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79 if prev != -1:
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80 if prev in children:
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81 children[prev].append(rev)
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82 else:
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83 children[prev] = [rev]
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84 visit.append(prev)
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85
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86 candidates.sort()
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87 # have we narrowed it down to one entry?
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88 # or have all other possible candidates besides 'bad' have been skipped?
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89 tot = len(candidates)
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90 unskipped = [c for c in candidates if (c not in skip) and (c != badrev)]
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91 if tot == 1 or not unskipped:
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92 return ([changelog.node(rev) for rev in candidates], 0, good)
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93 perfect = tot // 2
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94
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95 # find the best node to test
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96 best_rev = None
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97 best_len = -1
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98 poison = set()
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99 for rev in candidates:
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100 if rev in poison:
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101 # poison children
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102 poison.update(children.get(rev, []))
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103 continue
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104
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105 a = ancestors[rev] or [rev]
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106 ancestors[rev] = None
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107
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108 x = len(a) # number of ancestors
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109 y = tot - x # number of non-ancestors
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110 value = min(x, y) # how good is this test?
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111 if value > best_len and rev not in skip:
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112 best_len = value
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113 best_rev = rev
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114 if value == perfect: # found a perfect candidate? quit early
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115 break
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116
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117 if y < perfect and rev not in skip: # all downhill from here?
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118 # poison children
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119 poison.update(children.get(rev, []))
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120 continue
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121
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122 for c in children.get(rev, []):
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123 if ancestors[c]:
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124 ancestors[c] = list(set(ancestors[c] + a))
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125 else:
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126 ancestors[c] = a + [c]
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127
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128 assert best_rev is not None
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129 best_node = changelog.node(best_rev)
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130
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131 return ([best_node], tot, good)
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132
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133
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134 def load_state(repo):
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135 state = {'good': [], 'bad': [], 'skip': []}
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136 if os.path.exists(repo.join("bisect.state")):
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137 for l in repo.opener("bisect.state"):
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138 kind, node = l[:-1].split()
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139 node = repo.lookup(node)
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140 if kind not in state:
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141 raise util.Abort(_("unknown bisect kind %s") % kind)
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142 state[kind].append(node)
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143 return state
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144
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145
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146 def save_state(repo, state):
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147 f = repo.opener("bisect.state", "w", atomictemp=True)
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148 wlock = repo.wlock()
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149 try:
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150 for kind in state:
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151 for node in state[kind]:
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152 f.write("%s %s\n" % (kind, hex(node)))
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153 f.close()
7227
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154 finally:
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155 wlock.release()
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156
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157 def get(repo, status):
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158 """
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159 Return a list of revision(s) that match the given status:
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160
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161 - ``good``, ``bad``, ``skip``: csets explicitly marked as good/bad/skip
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162 - ``goods``, ``bads`` : csets topologicaly good/bad
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163 - ``range`` : csets taking part in the bisection
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164 - ``pruned`` : csets that are goods, bads or skipped
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165 - ``untested`` : csets whose fate is yet unknown
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166 - ``ignored`` : csets ignored due to DAG topology
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167 """
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168 state = load_state(repo)
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169 if status in ('good', 'bad', 'skip'):
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170 return [repo.changelog.rev(n) for n in state[status]]
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171 else:
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172 # In the floowing sets, we do *not* call 'bisect()' with more
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173 # than one level of recusrsion, because that can be very, very
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174 # time consuming. Instead, we always develop the expression as
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175 # much as possible.
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176
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177 # 'range' is all csets that make the bisection:
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178 # - have a good ancestor and a bad descendant, or conversely
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179 # that's because the bisection can go either way
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180 range = '( bisect(bad)::bisect(good) | bisect(good)::bisect(bad) )'
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181
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182 _t = repo.revs('bisect(good)::bisect(bad)')
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183 # The sets of topologically good or bad csets
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184 if len(_t) == 0:
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185 # Goods are topologically after bads
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186 goods = 'bisect(good)::' # Pruned good csets
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187 bads = '::bisect(bad)' # Pruned bad csets
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188 else:
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189 # Goods are topologically before bads
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190 goods = '::bisect(good)' # Pruned good csets
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191 bads = 'bisect(bad)::' # Pruned bad csets
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192
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193 # 'pruned' is all csets whose fate is already known: good, bad, skip
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194 skips = 'bisect(skip)' # Pruned skipped csets
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195 pruned = '( (%s) | (%s) | (%s) )' % (goods, bads, skips)
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196
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197 # 'untested' is all cset that are- in 'range', but not in 'pruned'
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198 untested = '( (%s) - (%s) )' % (range, pruned)
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199
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200 # 'ignored' is all csets that were not used during the bisection
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201 # due to DAG topology, but may however have had an impact.
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202 # Eg., a branch merged between bads and goods, but whose branch-
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203 # point is out-side of the range.
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204 iba = '::bisect(bad) - ::bisect(good)' # Ignored bads' ancestors
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205 iga = '::bisect(good) - ::bisect(bad)' # Ignored goods' ancestors
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206 ignored = '( ( (%s) | (%s) ) - (%s) )' % (iba, iga, range)
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207
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diff changeset
208 if status == 'range':
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209 return repo.revs(range)
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210 elif status == 'pruned':
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211 return repo.revs(pruned)
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212 elif status == 'untested':
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213 return repo.revs(untested)
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214 elif status == 'ignored':
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215 return repo.revs(ignored)
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216 elif status == "goods":
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217 return repo.revs(goods)
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218 elif status == "bads":
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219 return repo.revs(bads)
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220 else:
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221 raise error.ParseError(_('invalid bisect state'))
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222
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223 def label(repo, node):
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224 rev = repo.changelog.rev(node)
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225
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226 # Try explicit sets
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227 if rev in get(repo, 'good'):
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228 # i18n: bisect changeset status
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229 return _('good')
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230 if rev in get(repo, 'bad'):
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231 # i18n: bisect changeset status
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232 return _('bad')
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233 if rev in get(repo, 'skip'):
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234 # i18n: bisect changeset status
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235 return _('skipped')
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236 if rev in get(repo, 'untested'):
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237 # i18n: bisect changeset status
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238 return _('untested')
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239 if rev in get(repo, 'ignored'):
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240 # i18n: bisect changeset status
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241 return _('ignored')
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242
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243 # Try implicit sets
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244 if rev in get(repo, 'goods'):
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245 # i18n: bisect changeset status
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246 return _('good (implicit)')
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247 if rev in get(repo, 'bads'):
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248 # i18n: bisect changeset status
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249 return _('bad (implicit)')
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250
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251 return None
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252
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253 def shortlabel(label):
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254 if label:
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255 return label[0].upper()
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256
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257 return None