Mercurial > hg
annotate mercurial/hbisect.py @ 36705:c6901665cd5b
py3: make sure __repr__ returns a str
# skip-blame because just r'' prefix
Differential Revision: https://phab.mercurial-scm.org/D2652
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Sun, 04 Mar 2018 22:40:33 +0530 |
parents | 8287df8b7be5 |
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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 from __future__ import absolute_import |
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12 |
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13 import collections |
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14 |
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15 from .i18n import _ |
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16 from .node import ( |
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17 hex, |
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18 short, |
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19 ) |
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20 from . import ( |
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21 error, |
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22 ) |
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23 |
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24 def bisect(repo, state): |
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25 """find the next node (if any) for testing during a bisect search. |
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26 returns a (nodes, number, good) tuple. |
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27 |
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28 'nodes' is the final result of the bisect if 'number' is 0. |
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29 Otherwise 'number' indicates the remaining possible candidates for |
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30 the search and 'nodes' contains the next bisect target. |
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31 'good' is True if bisect is searching for a first good changeset, False |
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32 if searching for a first bad one. |
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33 """ |
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34 |
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35 changelog = repo.changelog |
5737 | 36 clparents = changelog.parentrevs |
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37 skip = set([changelog.rev(n) for n in state['skip']]) |
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38 |
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39 def buildancestors(bad, good): |
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40 badrev = min([changelog.rev(n) for n in bad]) |
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41 ancestors = collections.defaultdict(lambda: None) |
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42 for rev in repo.revs("descendants(%ln) - ancestors(%ln)", good, good): |
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43 ancestors[rev] = [] |
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44 if ancestors[badrev] is None: |
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46 return badrev, ancestors |
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47 |
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48 good = False |
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49 badrev, ancestors = buildancestors(state['bad'], state['good']) |
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50 if not ancestors: # looking for bad to good transition? |
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51 good = True |
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52 badrev, ancestors = buildancestors(state['good'], state['bad']) |
5777 | 53 bad = changelog.node(badrev) |
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54 if not ancestors: # now we're confused |
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55 if (len(state['bad']) == 1 and len(state['good']) == 1 and |
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56 state['bad'] != state['good']): |
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57 raise error.Abort(_("starting revisions are not directly related")) |
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58 raise error.Abort(_("inconsistent state, %s:%s is good and bad") |
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59 % (badrev, short(bad))) |
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60 |
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61 # build children dict |
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62 children = {} |
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63 visit = collections.deque([badrev]) |
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64 candidates = [] |
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65 while visit: |
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66 rev = visit.popleft() |
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67 if ancestors[rev] == []: |
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68 candidates.append(rev) |
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69 for prev in clparents(rev): |
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70 if prev != -1: |
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71 if prev in children: |
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72 children[prev].append(rev) |
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73 else: |
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74 children[prev] = [rev] |
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75 visit.append(prev) |
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76 |
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77 candidates.sort() |
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78 # have we narrowed it down to one entry? |
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79 # or have all other possible candidates besides 'bad' have been skipped? |
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80 tot = len(candidates) |
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81 unskipped = [c for c in candidates if (c not in skip) and (c != badrev)] |
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82 if tot == 1 or not unskipped: |
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83 return ([changelog.node(c) for c in candidates], 0, good) |
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84 perfect = tot // 2 |
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85 |
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86 # find the best node to test |
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87 best_rev = None |
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88 best_len = -1 |
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89 poison = set() |
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90 for rev in candidates: |
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91 if rev in poison: |
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92 # poison children |
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93 poison.update(children.get(rev, [])) |
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94 continue |
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95 |
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96 a = ancestors[rev] or [rev] |
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97 ancestors[rev] = None |
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98 |
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99 x = len(a) # number of ancestors |
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100 y = tot - x # number of non-ancestors |
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101 value = min(x, y) # how good is this test? |
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102 if value > best_len and rev not in skip: |
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103 best_len = value |
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104 best_rev = rev |
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105 if value == perfect: # found a perfect candidate? quit early |
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106 break |
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107 |
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108 if y < perfect and rev not in skip: # all downhill from here? |
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109 # poison children |
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110 poison.update(children.get(rev, [])) |
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111 continue |
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112 |
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113 for c in children.get(rev, []): |
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114 if ancestors[c]: |
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115 ancestors[c] = list(set(ancestors[c] + a)) |
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116 else: |
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117 ancestors[c] = a + [c] |
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118 |
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121 |
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122 return ([best_node], tot, good) |
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123 |
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124 def extendrange(repo, state, nodes, good): |
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125 # bisect is incomplete when it ends on a merge node and |
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126 # one of the parent was not checked. |
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127 parents = repo[nodes[0]].parents() |
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128 if len(parents) > 1: |
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129 if good: |
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130 side = state['bad'] |
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131 else: |
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132 side = state['good'] |
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133 num = len(set(i.node() for i in parents) & set(side)) |
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134 if num == 1: |
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135 return parents[0].ancestor(parents[1]) |
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136 return None |
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137 |
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138 def load_state(repo): |
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139 state = {'current': [], 'good': [], 'bad': [], 'skip': []} |
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140 for l in repo.vfs.tryreadlines("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 error.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 with repo.wlock(): |
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152 for kind in sorted(state): |
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153 for node in state[kind]: |
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154 f.write("%s %s\n" % (kind, hex(node))) |
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155 f.close() |
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156 |
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157 def resetstate(repo): |
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158 """remove any bisect state from the repository""" |
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159 if repo.vfs.exists("bisect.state"): |
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160 repo.vfs.unlink("bisect.state") |
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161 |
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162 def checkstate(state): |
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163 """check we have both 'good' and 'bad' to define a range |
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164 |
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165 Raise Abort exception otherwise.""" |
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166 if state['good'] and state['bad']: |
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167 return True |
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168 if not state['good']: |
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169 raise error.Abort(_('cannot bisect (no known good revisions)')) |
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170 else: |
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171 raise error.Abort(_('cannot bisect (no known bad revisions)')) |
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172 |
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173 def get(repo, status): |
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174 """ |
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175 Return a list of revision(s) that match the given status: |
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176 |
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177 - ``good``, ``bad``, ``skip``: csets explicitly marked as good/bad/skip |
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178 - ``goods``, ``bads`` : csets topologically good/bad |
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179 - ``range`` : csets taking part in the bisection |
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180 - ``pruned`` : csets that are goods, bads or skipped |
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181 - ``untested`` : csets whose fate is yet unknown |
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182 - ``ignored`` : csets ignored due to DAG topology |
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183 - ``current`` : the cset currently being bisected |
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184 """ |
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185 state = load_state(repo) |
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186 if status in ('good', 'bad', 'skip', 'current'): |
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187 return map(repo.changelog.rev, state[status]) |
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188 else: |
17493 | 189 # In the following sets, we do *not* call 'bisect()' with more |
17509 | 190 # than one level of recursion, because that can be very, very |
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191 # time consuming. Instead, we always develop the expression as |
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192 # much as possible. |
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193 |
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194 # 'range' is all csets that make the bisection: |
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195 # - have a good ancestor and a bad descendant, or conversely |
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196 # that's because the bisection can go either way |
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197 range = '( bisect(bad)::bisect(good) | bisect(good)::bisect(bad) )' |
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198 |
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199 _t = repo.revs('bisect(good)::bisect(bad)') |
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200 # The sets of topologically good or bad csets |
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201 if len(_t) == 0: |
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202 # Goods are topologically after bads |
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203 goods = 'bisect(good)::' # Pruned good csets |
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204 bads = '::bisect(bad)' # Pruned bad csets |
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205 else: |
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206 # Goods are topologically before bads |
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207 goods = '::bisect(good)' # Pruned good csets |
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208 bads = 'bisect(bad)::' # Pruned bad csets |
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209 |
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210 # 'pruned' is all csets whose fate is already known: good, bad, skip |
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211 skips = 'bisect(skip)' # Pruned skipped csets |
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212 pruned = '( (%s) | (%s) | (%s) )' % (goods, bads, skips) |
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213 |
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214 # 'untested' is all cset that are- in 'range', but not in 'pruned' |
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215 untested = '( (%s) - (%s) )' % (range, pruned) |
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216 |
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217 # 'ignored' is all csets that were not used during the bisection |
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218 # due to DAG topology, but may however have had an impact. |
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219 # E.g., a branch merged between bads and goods, but whose branch- |
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220 # point is out-side of the range. |
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221 iba = '::bisect(bad) - ::bisect(good)' # Ignored bads' ancestors |
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222 iga = '::bisect(good) - ::bisect(bad)' # Ignored goods' ancestors |
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223 ignored = '( ( (%s) | (%s) ) - (%s) )' % (iba, iga, range) |
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224 |
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225 if status == 'range': |
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226 return repo.revs(range) |
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227 elif status == 'pruned': |
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228 return repo.revs(pruned) |
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229 elif status == 'untested': |
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230 return repo.revs(untested) |
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231 elif status == 'ignored': |
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232 return repo.revs(ignored) |
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233 elif status == "goods": |
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234 return repo.revs(goods) |
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235 elif status == "bads": |
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236 return repo.revs(bads) |
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237 else: |
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238 raise error.ParseError(_('invalid bisect state')) |
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239 |
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240 def label(repo, node): |
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241 rev = repo.changelog.rev(node) |
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242 |
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243 # Try explicit sets |
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244 if rev in get(repo, 'good'): |
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245 # i18n: bisect changeset status |
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246 return _('good') |
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247 if rev in get(repo, 'bad'): |
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248 # i18n: bisect changeset status |
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249 return _('bad') |
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250 if rev in get(repo, 'skip'): |
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251 # i18n: bisect changeset status |
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252 return _('skipped') |
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253 if rev in get(repo, 'untested') or rev in get(repo, 'current'): |
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254 # i18n: bisect changeset status |
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255 return _('untested') |
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256 if rev in get(repo, 'ignored'): |
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257 # i18n: bisect changeset status |
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258 return _('ignored') |
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259 |
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260 # Try implicit sets |
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261 if rev in get(repo, 'goods'): |
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262 # i18n: bisect changeset status |
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263 return _('good (implicit)') |
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264 if rev in get(repo, 'bads'): |
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265 # i18n: bisect changeset status |
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266 return _('bad (implicit)') |
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267 |
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268 return None |
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269 |
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270 def shortlabel(label): |
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271 if label: |
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272 return label[0].upper() |
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273 |
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274 return None |
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275 |
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276 def printresult(ui, repo, state, displayer, nodes, good): |
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277 if len(nodes) == 1: |
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278 # narrowed it down to a single revision |
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279 if good: |
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280 ui.write(_("The first good revision is:\n")) |
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281 else: |
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282 ui.write(_("The first bad revision is:\n")) |
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283 displayer.show(repo[nodes[0]]) |
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284 extendnode = extendrange(repo, state, nodes, good) |
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285 if extendnode is not None: |
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286 ui.write(_('Not all ancestors of this changeset have been' |
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287 ' checked.\nUse bisect --extend to continue the ' |
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288 'bisection from\nthe common ancestor, %s.\n') |
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289 % extendnode) |
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290 else: |
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291 # multiple possible revisions |
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292 if good: |
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293 ui.write(_("Due to skipped revisions, the first " |
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294 "good revision could be any of:\n")) |
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295 else: |
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296 ui.write(_("Due to skipped revisions, the first " |
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297 "bad revision could be any of:\n")) |
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298 for n in nodes: |
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299 displayer.show(repo[n]) |
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300 displayer.close() |