Mercurial > hg
annotate mercurial/hbisect.py @ 8564:6b9ec23b09fc
named branches: improve pre-push logic (issue736)
Each named branch is considered separately, and the push is allowed if
no new branch heads are created for any named branch to be pushed.
Due to some tests's use of --debug, their output will change after this
addition. This has been fixed as well.
Co-contributor: Henrik Stuart <henrik.stuart@edlund.dk>
author | Sune Foldager <cryo@cyanite.org> |
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date | Sat, 23 May 2009 17:04:31 +0200 |
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children | 0491be4448bf |
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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, incorporated herein by reference. |
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10 |
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11 import os |
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12 from i18n import _ |
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13 from node import short, hex |
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14 import util |
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15 |
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16 def bisect(changelog, state): |
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17 """find the next node (if any) for testing during a bisect search. |
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18 returns a (nodes, number, good) tuple. |
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19 |
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20 'nodes' is the final result of the bisect if 'number' is 0. |
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21 Otherwise 'number' indicates the remaining possible candidates for |
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22 the search and 'nodes' contains the next bisect target. |
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23 'good' is True if bisect is searching for a first good changeset, False |
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24 if searching for a first bad one. |
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25 """ |
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26 |
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28 skip = set([changelog.rev(n) for n in state['skip']]) |
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29 |
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30 def buildancestors(bad, good): |
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31 # only the earliest bad revision matters |
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32 badrev = min([changelog.rev(n) for n in bad]) |
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33 goodrevs = [changelog.rev(n) for n in good] |
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34 # build ancestors array |
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35 ancestors = [[]] * (len(changelog) + 1) # an extra for [-1] |
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36 |
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37 # clear good revs from array |
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38 for node in goodrevs: |
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39 ancestors[node] = None |
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40 for rev in xrange(len(changelog), -1, -1): |
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41 if ancestors[rev] is None: |
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42 for prev in clparents(rev): |
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43 ancestors[prev] = None |
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44 |
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45 if ancestors[badrev] is None: |
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47 return badrev, ancestors |
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48 |
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49 good = 0 |
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50 badrev, ancestors = buildancestors(state['bad'], state['good']) |
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51 if not ancestors: # looking for bad to good transition? |
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52 good = 1 |
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53 badrev, ancestors = buildancestors(state['good'], state['bad']) |
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55 if not ancestors: # now we're confused |
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57 % (badrev, short(bad))) |
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58 |
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59 # build children dict |
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60 children = {} |
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61 visit = [badrev] |
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62 candidates = [] |
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63 while visit: |
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64 rev = visit.pop(0) |
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65 if ancestors[rev] == []: |
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66 candidates.append(rev) |
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67 for prev in clparents(rev): |
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68 if prev != -1: |
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69 if prev in children: |
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70 children[prev].append(rev) |
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71 else: |
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72 children[prev] = [rev] |
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73 visit.append(prev) |
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74 |
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75 candidates.sort() |
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76 # have we narrowed it down to one entry? |
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77 # or have all other possible candidates besides 'bad' have been skipped? |
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78 tot = len(candidates) |
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79 unskipped = [c for c in candidates if (c not in skip) and (c != badrev)] |
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80 if tot == 1 or not unskipped: |
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81 return ([changelog.node(rev) for rev in candidates], 0, good) |
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82 perfect = tot // 2 |
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83 |
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84 # find the best node to test |
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85 best_rev = None |
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86 best_len = -1 |
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87 poison = set() |
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88 for rev in candidates: |
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89 if rev in poison: |
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90 # poison children |
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91 poison.update(children.get(rev, [])) |
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92 continue |
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93 |
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94 a = ancestors[rev] or [rev] |
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95 ancestors[rev] = None |
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96 |
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97 x = len(a) # number of ancestors |
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98 y = tot - x # number of non-ancestors |
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99 value = min(x, y) # how good is this test? |
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100 if value > best_len and rev not in skip: |
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101 best_len = value |
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102 best_rev = rev |
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103 if value == perfect: # found a perfect candidate? quit early |
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104 break |
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105 |
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106 if y < perfect and rev not in skip: # all downhill from here? |
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107 # poison children |
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108 poison.update(children.get(rev, [])) |
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109 continue |
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110 |
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111 for c in children.get(rev, []): |
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112 if ancestors[c]: |
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113 ancestors[c] = list(set(ancestors[c] + a)) |
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114 else: |
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115 ancestors[c] = a + [c] |
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116 |
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118 best_node = changelog.node(best_rev) | |
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119 |
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120 return ([best_node], tot, good) |
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121 |
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122 |
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123 def load_state(repo): |
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124 state = {'good': [], 'bad': [], 'skip': []} |
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125 if os.path.exists(repo.join("bisect.state")): |
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126 for l in repo.opener("bisect.state"): |
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127 kind, node = l[:-1].split() |
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128 node = repo.lookup(node) |
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129 if kind not in state: |
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130 raise util.Abort(_("unknown bisect kind %s") % kind) |
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131 state[kind].append(node) |
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132 return state |
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133 |
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134 |
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135 def save_state(repo, state): |
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136 f = repo.opener("bisect.state", "w", atomictemp=True) |
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137 wlock = repo.wlock() |
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138 try: |
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139 for kind in state: |
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140 for node in state[kind]: |
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141 f.write("%s %s\n" % (kind, hex(node))) |
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142 f.rename() |
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143 finally: |
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144 wlock.release() |
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145 |