annotate mercurial/hbisect.py @ 25563:69e8384a436c

fancyopts: allow all callable as default parameter value The current fancyopts allows function as default parameter value but not other callables. By supporting other callables, we can have the benefits of e.g., custom __str__ method, which will be printed by 'hg help' as the default value.
author introom <i@introo.me>
date Thu, 11 Jun 2015 08:54:24 -0400
parents 0ca8410ea345
children f0ad094db832
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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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11 import collections
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12 import os
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13 import error
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14 from i18n import _
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15 from node import short, hex
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16 import util
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17
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18 def bisect(changelog, state):
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19 """find the next node (if any) for testing during a bisect search.
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20 returns a (nodes, number, good) tuple.
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21
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22 'nodes' is the final result of the bisect if 'number' is 0.
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23 Otherwise 'number' indicates the remaining possible candidates for
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24 the search and 'nodes' contains the next bisect target.
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25 'good' is True if bisect is searching for a first good changeset, False
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26 if searching for a first bad one.
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27 """
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28
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29 clparents = changelog.parentrevs
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30 skip = set([changelog.rev(n) for n in state['skip']])
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31
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32 def buildancestors(bad, good):
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33 # only the earliest bad revision matters
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34 badrev = min([changelog.rev(n) for n in bad])
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35 goodrevs = [changelog.rev(n) for n in good]
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36 goodrev = min(goodrevs)
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37 # build visit array
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38 ancestors = [None] * (len(changelog) + 1) # an extra for [-1]
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39
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40 # set nodes descended from goodrevs
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41 for rev in goodrevs:
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42 ancestors[rev] = []
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43 for rev in changelog.revs(goodrev + 1):
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44 for prev in clparents(rev):
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45 if ancestors[prev] == []:
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46 ancestors[rev] = []
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47
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48 # clear good revs from array
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49 for rev in goodrevs:
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50 ancestors[rev] = None
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51 for rev in changelog.revs(len(changelog), goodrev):
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52 if ancestors[rev] is None:
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53 for prev in clparents(rev):
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54 ancestors[prev] = None
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55
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56 if ancestors[badrev] is None:
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57 return badrev, None
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58 return badrev, ancestors
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59
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60 good = False
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61 badrev, ancestors = buildancestors(state['bad'], state['good'])
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62 if not ancestors: # looking for bad to good transition?
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63 good = True
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64 badrev, ancestors = buildancestors(state['good'], state['bad'])
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65 bad = changelog.node(badrev)
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66 if not ancestors: # now we're confused
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67 if (len(state['bad']) == 1 and len(state['good']) == 1 and
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68 state['bad'] != state['good']):
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69 raise util.Abort(_("starting revisions are not directly related"))
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70 raise util.Abort(_("inconsistent state, %s:%s is good and bad")
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71 % (badrev, short(bad)))
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72
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73 # build children dict
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74 children = {}
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75 visit = collections.deque([badrev])
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76 candidates = []
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77 while visit:
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78 rev = visit.popleft()
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79 if ancestors[rev] == []:
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80 candidates.append(rev)
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81 for prev in clparents(rev):
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82 if prev != -1:
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83 if prev in children:
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84 children[prev].append(rev)
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85 else:
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86 children[prev] = [rev]
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87 visit.append(prev)
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88
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89 candidates.sort()
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90 # have we narrowed it down to one entry?
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91 # or have all other possible candidates besides 'bad' have been skipped?
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92 tot = len(candidates)
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93 unskipped = [c for c in candidates if (c not in skip) and (c != badrev)]
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94 if tot == 1 or not unskipped:
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95 return ([changelog.node(rev) for rev in candidates], 0, good)
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96 perfect = tot // 2
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97
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98 # find the best node to test
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99 best_rev = None
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100 best_len = -1
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101 poison = set()
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102 for rev in candidates:
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103 if rev in poison:
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104 # poison children
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105 poison.update(children.get(rev, []))
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106 continue
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107
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108 a = ancestors[rev] or [rev]
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109 ancestors[rev] = None
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110
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111 x = len(a) # number of ancestors
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112 y = tot - x # number of non-ancestors
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113 value = min(x, y) # how good is this test?
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114 if value > best_len and rev not in skip:
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115 best_len = value
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116 best_rev = rev
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117 if value == perfect: # found a perfect candidate? quit early
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118 break
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119
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120 if y < perfect and rev not in skip: # all downhill from here?
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121 # poison children
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122 poison.update(children.get(rev, []))
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123 continue
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124
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125 for c in children.get(rev, []):
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126 if ancestors[c]:
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127 ancestors[c] = list(set(ancestors[c] + a))
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128 else:
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129 ancestors[c] = a + [c]
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130
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131 assert best_rev is not None
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132 best_node = changelog.node(best_rev)
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133
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134 return ([best_node], tot, good)
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135
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136
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137 def load_state(repo):
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138 state = {'current': [], 'good': [], 'bad': [], 'skip': []}
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139 if os.path.exists(repo.join("bisect.state")):
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140 for l in repo.vfs("bisect.state"):
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141 kind, node = l[:-1].split()
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142 node = repo.lookup(node)
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143 if kind not in state:
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144 raise util.Abort(_("unknown bisect kind %s") % kind)
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145 state[kind].append(node)
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146 return state
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147
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148
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149 def save_state(repo, state):
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150 f = repo.vfs("bisect.state", "w", atomictemp=True)
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151 wlock = repo.wlock()
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152 try:
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153 for kind in sorted(state):
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154 for node in state[kind]:
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155 f.write("%s %s\n" % (kind, hex(node)))
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156 f.close()
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157 finally:
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158 wlock.release()
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159
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160 def get(repo, status):
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161 """
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162 Return a list of revision(s) that match the given status:
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163
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164 - ``good``, ``bad``, ``skip``: csets explicitly marked as good/bad/skip
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165 - ``goods``, ``bads`` : csets topologically good/bad
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166 - ``range`` : csets taking part in the bisection
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167 - ``pruned`` : csets that are goods, bads or skipped
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168 - ``untested`` : csets whose fate is yet unknown
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169 - ``ignored`` : csets ignored due to DAG topology
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170 - ``current`` : the cset currently being bisected
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171 """
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172 state = load_state(repo)
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173 if status in ('good', 'bad', 'skip', 'current'):
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174 return map(repo.changelog.rev, state[status])
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175 else:
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176 # In the following sets, we do *not* call 'bisect()' with more
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177 # than one level of recursion, because that can be very, very
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178 # time consuming. Instead, we always develop the expression as
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179 # much as possible.
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180
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181 # 'range' is all csets that make the bisection:
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182 # - have a good ancestor and a bad descendant, or conversely
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183 # that's because the bisection can go either way
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184 range = '( bisect(bad)::bisect(good) | bisect(good)::bisect(bad) )'
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185
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186 _t = repo.revs('bisect(good)::bisect(bad)')
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187 # The sets of topologically good or bad csets
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188 if len(_t) == 0:
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189 # Goods are topologically after 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 else:
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193 # Goods are topologically before bads
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194 goods = '::bisect(good)' # Pruned good csets
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195 bads = 'bisect(bad)::' # Pruned bad csets
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196
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197 # 'pruned' is all csets whose fate is already known: good, bad, skip
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198 skips = 'bisect(skip)' # Pruned skipped csets
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199 pruned = '( (%s) | (%s) | (%s) )' % (goods, bads, skips)
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200
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201 # 'untested' is all cset that are- in 'range', but not in 'pruned'
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202 untested = '( (%s) - (%s) )' % (range, pruned)
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203
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204 # 'ignored' is all csets that were not used during the bisection
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205 # due to DAG topology, but may however have had an impact.
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206 # E.g., a branch merged between bads and goods, but whose branch-
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207 # point is out-side of the range.
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208 iba = '::bisect(bad) - ::bisect(good)' # Ignored bads' ancestors
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209 iga = '::bisect(good) - ::bisect(bad)' # Ignored goods' ancestors
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210 ignored = '( ( (%s) | (%s) ) - (%s) )' % (iba, iga, range)
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211
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212 if status == 'range':
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213 return repo.revs(range)
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214 elif status == 'pruned':
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215 return repo.revs(pruned)
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216 elif status == 'untested':
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217 return repo.revs(untested)
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218 elif status == 'ignored':
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219 return repo.revs(ignored)
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220 elif status == "goods":
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221 return repo.revs(goods)
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222 elif status == "bads":
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223 return repo.revs(bads)
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224 else:
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225 raise error.ParseError(_('invalid bisect state'))
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226
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227 def label(repo, node):
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228 rev = repo.changelog.rev(node)
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229
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230 # Try explicit sets
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231 if rev in get(repo, 'good'):
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232 # i18n: bisect changeset status
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233 return _('good')
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234 if rev in get(repo, 'bad'):
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235 # i18n: bisect changeset status
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236 return _('bad')
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237 if rev in get(repo, 'skip'):
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238 # i18n: bisect changeset status
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239 return _('skipped')
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240 if rev in get(repo, 'untested') or rev in get(repo, 'current'):
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241 # i18n: bisect changeset status
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242 return _('untested')
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243 if rev in get(repo, 'ignored'):
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244 # i18n: bisect changeset status
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245 return _('ignored')
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246
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247 # Try implicit sets
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248 if rev in get(repo, 'goods'):
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249 # i18n: bisect changeset status
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250 return _('good (implicit)')
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251 if rev in get(repo, 'bads'):
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252 # i18n: bisect changeset status
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253 return _('bad (implicit)')
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254
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255 return None
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256
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257 def shortlabel(label):
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258 if label:
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259 return label[0].upper()
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260
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261 return None