Mercurial > hg
annotate hgext/hbisect.py @ 5714:9d50b2450ac3
bisect: simplify lookup
- use repo.lookup directly
- move merge check to check_clean
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 27 Dec 2007 23:55:39 -0600 |
parents | f9620af9f8d8 |
children | d280774a7498 |
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1 # bisect extension for mercurial |
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2 # |
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3 # Copyright 2005, 2006 Benoit Boissinot <benoit.boissinot@ens-lyon.org> |
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4 # Inspired by git bisect, extension skeleton taken from mq.py. |
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5 # |
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6 # This software may be used and distributed according to the terms |
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7 # of the GNU General Public License, incorporated herein by reference. |
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8 |
3891 | 9 from mercurial.i18n import _ |
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10 from mercurial import hg, util, commands, cmdutil |
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11 import os, sys, sets |
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12 |
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13 versionstr = "0.0.3" |
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14 |
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15 def check_clean(ui, repo): |
5714 | 16 merged = (nullid in repo.dirstate.parents()) |
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17 modified, added, removed, deleted, unknown = repo.status()[:5] |
5714 | 18 if modified or added or removed or merged: |
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19 ui.warn("Repository is not clean, please commit or revert\n") |
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20 sys.exit(1) |
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21 |
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22 class bisect(object): |
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23 """dichotomic search in the DAG of changesets""" |
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24 def __init__(self, ui, repo): |
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25 self.repo = repo |
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26 self.path = repo.join("bisect") |
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27 self.opener = util.opener(self.path) |
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28 self.ui = ui |
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29 self.goodrevs = [] |
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30 self.badrev = None |
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31 self.good_path = "good" |
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32 self.bad_path = "bad" |
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33 self.is_reset = False |
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34 |
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35 if os.path.exists(os.path.join(self.path, self.good_path)): |
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36 self.goodrevs = self.opener(self.good_path).read().splitlines() |
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37 self.goodrevs = [hg.bin(x) for x in self.goodrevs] |
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38 if os.path.exists(os.path.join(self.path, self.bad_path)): |
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39 r = self.opener(self.bad_path).read().splitlines() |
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40 if r: |
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41 self.badrev = hg.bin(r.pop(0)) |
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42 |
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43 def write(self): |
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44 if self.is_reset: |
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45 return |
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46 if not os.path.isdir(self.path): |
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47 os.mkdir(self.path) |
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48 f = self.opener(self.good_path, "w") |
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49 f.write("\n".join([hg.hex(r) for r in self.goodrevs])) |
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50 if len(self.goodrevs) > 0: |
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51 f.write("\n") |
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52 f = self.opener(self.bad_path, "w") |
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53 if self.badrev: |
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54 f.write(hg.hex(self.badrev) + "\n") |
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55 |
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56 def init(self): |
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57 """start a new bisection""" |
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58 if os.path.isdir(self.path): |
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59 raise util.Abort(_("bisect directory already exists\n")) |
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60 os.mkdir(self.path) |
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61 check_clean(self.ui, self.repo) |
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62 return 0 |
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63 |
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64 def reset(self): |
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65 """finish a bisection""" |
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66 if os.path.isdir(self.path): |
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67 sl = [os.path.join(self.path, p) |
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68 for p in [self.bad_path, self.good_path]] |
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69 for s in sl: |
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70 if os.path.exists(s): |
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71 os.unlink(s) |
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72 os.rmdir(self.path) |
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73 # Not sure about this |
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74 #self.ui.write("Going back to tip\n") |
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75 #self.repo.update(self.repo.changelog.tip()) |
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76 self.is_reset = True |
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77 return 0 |
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78 |
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79 def __ancestors_and_nb_ancestors(self, head, stop=None): |
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80 """ |
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81 if stop is None then ancestors of goodrevs are used as |
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82 lower limit. |
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83 |
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84 returns (anc, n_child) where anc is the set of the ancestors of head |
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85 and n_child is a dictionary with the following mapping: |
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86 node -> number of ancestors (self included) |
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87 """ |
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88 cl = self.repo.changelog |
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89 if not stop: |
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90 stop = sets.Set([]) |
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91 for i in xrange(len(self.goodrevs)-1, -1, -1): |
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92 g = self.goodrevs[i] |
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93 if g in stop: |
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94 continue |
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95 stop.update(cl.reachable(g)) |
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96 def num_children(a): |
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97 """ |
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98 returns a dictionnary with the following mapping |
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99 node -> [number of children, empty set] |
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100 """ |
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101 d = {a: [0, sets.Set([])]} |
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102 for i in xrange(cl.rev(a)+1): |
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103 n = cl.node(i) |
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104 if not d.has_key(n): |
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105 d[n] = [0, sets.Set([])] |
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106 parents = [p for p in cl.parents(n) if p != hg.nullid] |
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107 for p in parents: |
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108 d[p][0] += 1 |
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109 return d |
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110 |
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111 if head in stop: |
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112 raise util.Abort(_("Inconsistent state, %s:%s is good and bad") |
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113 % (cl.rev(head), hg.short(head))) |
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114 n_child = num_children(head) |
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115 for i in xrange(cl.rev(head)+1): |
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116 n = cl.node(i) |
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117 parents = [p for p in cl.parents(n) if p != hg.nullid] |
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118 for p in parents: |
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119 n_child[p][0] -= 1 |
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120 if not n in stop: |
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121 n_child[n][1].union_update(n_child[p][1]) |
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122 if n_child[p][0] == 0: |
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123 n_child[p] = len(n_child[p][1]) |
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124 if not n in stop: |
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125 n_child[n][1].add(n) |
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126 if n_child[n][0] == 0: |
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127 if n == head: |
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128 anc = n_child[n][1] |
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129 n_child[n] = len(n_child[n][1]) |
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130 return anc, n_child |
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131 |
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132 def next(self): |
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133 if not self.badrev: |
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134 raise util.Abort(_("You should give at least one bad revision")) |
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135 if not self.goodrevs: |
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136 self.ui.warn(_("No good revision given\n")) |
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137 self.ui.warn(_("Marking the first revision as good\n")) |
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138 ancestors, num_ancestors = self.__ancestors_and_nb_ancestors( |
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139 self.badrev) |
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140 tot = len(ancestors) |
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141 if tot == 1: |
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142 if ancestors.pop() != self.badrev: |
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143 raise util.Abort(_("Could not find the first bad revision")) |
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144 self.ui.write(_("The first bad revision is:\n")) |
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145 displayer = cmdutil.show_changeset(self.ui, self.repo, {}) |
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146 displayer.show(changenode=self.badrev) |
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147 return None |
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148 best_rev = None |
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149 best_len = -1 |
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150 for n in ancestors: |
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151 l = num_ancestors[n] |
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152 l = min(l, tot - l) |
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153 if l > best_len: |
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154 best_len = l |
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155 best_rev = n |
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156 assert best_rev is not None |
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157 nb_tests = 0 |
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158 q, r = divmod(tot, 2) |
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159 while q: |
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160 nb_tests += 1 |
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161 q, r = divmod(q, 2) |
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162 msg = _("Testing changeset %s:%s (%s changesets remaining, " |
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163 "~%s tests)\n") % (self.repo.changelog.rev(best_rev), |
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164 hg.short(best_rev), tot, nb_tests) |
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165 self.ui.write(msg) |
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166 return best_rev |
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167 |
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168 def autonext(self): |
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169 """find and update to the next revision to test""" |
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170 rev = self.next() |
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171 check_clean(self.ui, self.repo) |
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172 if rev is not None: |
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173 return hg.clean(self.repo, rev) |
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174 |
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175 def autogood(self, rev=None): |
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176 """mark revision as good and update to the next revision to test""" |
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178 if self.badrev: |
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179 return self.autonext() |
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180 |
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181 def autobad(self, rev=None): |
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182 """mark revision as bad and update to the next revision to test""" |
5714 | 183 self.badrev = self.repo.lookup(rev or '.') |
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184 if self.goodrevs: |
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185 self.autonext() |
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186 |
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187 # should we put it in the class ? |
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188 def test(ui, repo, rev): |
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189 """test the bisection code""" |
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190 b = bisect(ui, repo) |
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191 rev = repo.lookup(rev) |
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192 ui.write("testing with rev %s\n" % hg.hex(rev)) |
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193 anc = b.ancestors() |
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194 while len(anc) > 1: |
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195 if not rev in anc: |
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196 ui.warn("failure while bisecting\n") |
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197 sys.exit(1) |
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198 ui.write("it worked :)\n") |
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199 new_rev = b.next() |
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200 ui.write("choosing if good or bad\n") |
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201 if rev in b.ancestors(head=new_rev): |
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202 b.bad(new_rev) |
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203 ui.write("it is bad\n") |
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204 else: |
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205 b.good(new_rev) |
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206 ui.write("it is good\n") |
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207 anc = b.ancestors() |
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208 #repo.update(new_rev, force=True) |
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209 for v in anc: |
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210 if v != rev: |
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211 ui.warn("fail to found cset! :(\n") |
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212 return 1 |
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213 ui.write("Found bad cset: %s\n" % hg.hex(b.badrev)) |
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214 ui.write("Everything is ok :)\n") |
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215 return 0 |
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216 |
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217 def bisect_run(ui, repo, cmd=None, *args): |
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218 """Dichotomic search in the DAG of changesets |
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219 |
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220 This extension helps to find changesets which cause problems. |
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221 To use, mark the earliest changeset you know introduces the problem |
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222 as bad, then mark the latest changeset which is free from the problem |
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223 as good. Bisect will update your working directory to a revision for |
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224 testing. Once you have performed tests, mark the working directory |
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225 as bad or good and bisect will either update to another candidate |
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226 changeset or announce that it has found the bad revision. |
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227 |
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228 Note: bisect expects bad revisions to be descendants of good revisions. |
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229 If you are looking for the point at which a problem was fixed, then make |
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230 the problem-free state "bad" and the problematic state "good." |
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231 |
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232 For subcommands see "hg bisect help\" |
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233 """ |
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234 def help_(cmd=None, *args): |
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235 """show help for a given bisect subcommand or all subcommands""" |
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236 cmdtable = bisectcmdtable |
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237 if cmd: |
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238 doc = cmdtable[cmd][0].__doc__ |
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239 synopsis = cmdtable[cmd][2] |
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240 ui.write(synopsis + "\n") |
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241 ui.write("\n" + doc + "\n") |
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242 return |
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243 ui.write(_("list of subcommands for the bisect extension\n\n")) |
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244 cmds = cmdtable.keys() |
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245 cmds.sort() |
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246 m = max([len(c) for c in cmds]) |
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247 for cmd in cmds: |
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248 doc = cmdtable[cmd][0].__doc__.splitlines(0)[0].rstrip() |
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249 ui.write(" %-*s %s\n" % (m, cmd, doc)) |
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250 |
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251 b = bisect(ui, repo) |
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252 bisectcmdtable = { |
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253 "init": (b.init, 0, _("hg bisect init")), |
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254 "bad": (b.autobad, 1, _("hg bisect bad [<rev>]")), |
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255 "good": (b.autogood, 1, _("hg bisect good [<rev>]")), |
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256 "next": (b.autonext, 0, _("hg bisect next")), |
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257 "reset": (b.reset, 0, _("hg bisect reset")), |
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258 "help": (help_, 1, _("hg bisect help [<subcommand>]")), |
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259 } |
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260 |
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261 if not bisectcmdtable.has_key(cmd): |
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262 ui.warn(_("bisect: Unknown sub-command\n")) |
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263 return help_() |
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264 if len(args) > bisectcmdtable[cmd][1]: |
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265 ui.warn(_("bisect: Too many arguments\n")) |
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266 return help_() |
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267 ret = bisectcmdtable[cmd][0](*args) |
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268 b.write() |
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269 return ret |
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270 |
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271 cmdtable = { |
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272 "bisect": (bisect_run, [], _("hg bisect [help|init|reset|next|good|bad]")), |
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273 #"bisect-test": (test, [], "hg bisect-test rev"), |
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274 } |