Mercurial > public > mercurial-scm > evolve

annotate hgext3rd/topic/stack.py @ 1977:137f8b04901e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
topic: list the number of changesets when --verbose is used Displaying more information in the topic list is useful, we start with the most obvious: number of non-obsolete changeset in the topic.
author Pierre-Yves David <pierre-yves.david@ens-lyon.org>
date Fri, 12 Aug 2016 23:59:37 +0200
parents d9c7fced94fc
children e42dd4523c0d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1895
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1 # stack.py - code related to stack workflow
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2 #
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3 # This software may be used and distributed according to the terms of the
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4 # GNU General Public License version 2 or any later version.
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5 import collections
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6 from mercurial.i18n import _
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7 from mercurial import (
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8 error,
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9 node,
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10 obsolete,
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11 )
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12
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13 def getstack(repo, topic):
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14 # XXX need sorting
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15 trevs = repo.revs("topic(%s) - obsolete()", topic)
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16 return _orderrevs(repo, trevs)
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17
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18 def showstack(ui, repo, topic, opts):
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19 if not topic:
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20 topic = repo.currenttopic
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21 if not topic:
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22 raise error.Abort(_('no active topic to list'))
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23 fm = ui.formatter('topicstack', opts)
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24 prev = None
1955
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25 entries = []
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26 for idx, r in enumerate(getstack(repo, topic), 1):
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27 ctx = repo[r]
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28 p1 = ctx.p1()
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29 if p1.obsolete():
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30 p1 = repo[_singlesuccessor(repo, p1)]
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31 if p1.rev() != prev and p1.node() != node.nullid:
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32 entries.append((None, p1))
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33 entries.append((idx, ctx))
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34 prev = r
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35
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36 # super crude initial version
1956
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37 for idx, ctx in entries[::-1]:
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38 if idx is None:
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39 symbol = '^'
1955
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40 state = 'base'
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41 elif repo.revs('%d and parents()', ctx.rev()):
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42 symbol = '@'
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43 state = 'current'
1955
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44 elif repo.revs('%d and unstable()', ctx.rev()):
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45 symbol = '$'
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46 state = 'unstable'
1955
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47 else:
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48 symbol = ':'
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49 state = 'clean'
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50 fm.startitem()
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51 if idx is None:
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52 fm.plain(' ')
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53 else:
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54 fm.write('topic.stack.index', 't%d', idx,
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55 label='topic.stack.index topic.stack.index.%s' % state)
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56 fm.write('topic.stack.state.symbol', '%s', symbol,
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57 label='topic.stack.state topic.stack.state.%s' % state)
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58 fm.plain(' ')
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59 fm.write('topic.stack.desc', '%s', ctx.description().splitlines()[0],
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60 label='topic.stack.desc topic.stack.desc.%s' % state)
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61 fm.condwrite(state != 'clean' and idx is not None, 'topic.stack.state',
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62 ' (%s)', state,
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63 label='topic.stack.state topic.stack.state.%s' % state)
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64 fm.plain('\n')
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65 fm.end()
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66
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67 def stackdata(repo, topic):
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68 """get various data about a stack
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69
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70 :changesetcount: number of non-obsolete changesets in the stack
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71 """
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72 data = {}
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73 revs = repo.revs("topic(%s) - obsolete()", topic)
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74 data['changesetcount'] = len(revs)
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75 return data
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76
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77 # Copied from evolve 081605c2e9b6
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78
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79 def _orderrevs(repo, revs):
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80 """Compute an ordering to solve instability for the given revs
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81
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82 revs is a list of unstable revisions.
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83
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84 Returns the same revisions ordered to solve their instability from the
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85 bottom to the top of the stack that the stabilization process will produce
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86 eventually.
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87
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88 This ensures the minimal number of stabilizations, as we can stabilize each
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89 revision on its final stabilized destination.
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90 """
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91 # Step 1: Build the dependency graph
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92 dependencies, rdependencies = builddependencies(repo, revs)
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93 # Step 2: Build the ordering
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94 # Remove the revisions with no dependency(A) and add them to the ordering.
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95 # Removing these revisions leads to new revisions with no dependency (the
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96 # one depending on A) that we can remove from the dependency graph and add
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97 # to the ordering. We progress in a similar fashion until the ordering is
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98 # built
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99 solvablerevs = [r for r in sorted(dependencies.keys())
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100 if not dependencies[r]]
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101 ordering = []
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102 while solvablerevs:
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103 rev = solvablerevs.pop()
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104 for dependent in rdependencies[rev]:
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105 dependencies[dependent].remove(rev)
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106 if not dependencies[dependent]:
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107 solvablerevs.append(dependent)
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108 del dependencies[rev]
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109 ordering.append(rev)
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110
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111 ordering.extend(sorted(dependencies))
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112 return ordering
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113
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114 def builddependencies(repo, revs):
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115 """returns dependency graphs giving an order to solve instability of revs
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116 (see _orderrevs for more information on usage)"""
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117
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118 # For each troubled revision we keep track of what instability if any should
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119 # be resolved in order to resolve it. Example:
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120 # dependencies = {3: [6], 6:[]}
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121 # Means that: 6 has no dependency, 3 depends on 6 to be solved
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122 dependencies = {}
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123 # rdependencies is the inverted dict of dependencies
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124 rdependencies = collections.defaultdict(set)
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125
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126 for r in revs:
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127 dependencies[r] = set()
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128 for p in repo[r].parents():
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129 try:
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130 succ = _singlesuccessor(repo, p)
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131 except MultipleSuccessorsError as exc:
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132 dependencies[r] = exc.successorssets
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133 continue
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134 if succ in revs:
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135 dependencies[r].add(succ)
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136 rdependencies[succ].add(r)
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137 return dependencies, rdependencies
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138
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139 def _singlesuccessor(repo, p):
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140 """returns p (as rev) if not obsolete or its unique latest successors
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141
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142 fail if there are no such successor"""
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143
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144 if not p.obsolete():
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145 return p.rev()
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146 obs = repo[p]
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147 ui = repo.ui
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148 newer = obsolete.successorssets(repo, obs.node())
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149 # search of a parent which is not killed
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150 while not newer:
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151 ui.debug("stabilize target %s is plain dead,"
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152 " trying to stabilize on its parent\n" %
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153 obs)
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154 obs = obs.parents()[0]
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155 newer = obsolete.successorssets(repo, obs.node())
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156 if len(newer) > 1 or len(newer[0]) > 1:
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157 raise MultipleSuccessorsError(newer)
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158
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159 return repo[newer[0][0]].rev()
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160
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161 class MultipleSuccessorsError(RuntimeError):
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162 """Exception raised by _singlesuccessor when multiple successor sets exists
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163
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164 The object contains the list of successorssets in its 'successorssets'
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165 attribute to call to easily recover.
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166 """
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167
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168 def __init__(self, successorssets):
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169 self.successorssets = successorssets