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annotate mercurial/destutil.py @ 30961:330fbd515512

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destutil: remove duplicate check and leave it to merge.update() The check is done in merge.update() already and the next few patches will add more checks there. Some of the additional checks will need information about the merge that will not be available in destutil. Since commands.postincoming() catches UpdateAbort(), we need to change merge.update() to raise that more specific exception. This goes directly again 45b86dbabbda (destupdate: move the check related to the "clean" logic in the function, 2015-10-05), but it will simplify the next few patches, and we can always move it out again (preferably move, not copy) after if we still think it's better that way.
author Martin von Zweigbergk <martinvonz@google.com>
date Thu, 09 Feb 2017 09:52:32 -0800
parents 76a1e735449c
children 11c253997b0e
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1 # destutil.py - Mercurial utility function for command destination
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2 #
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3 # Copyright Matt Mackall <mpm@selenic.com> and other
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4 #
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5 # This software may be used and distributed according to the terms of the
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6 # GNU General Public License version 2 or any later version.
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7
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8 from __future__ import absolute_import
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9
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10 from .i18n import _
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11 from . import (
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12 bookmarks,
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13 error,
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14 obsolete,
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15 )
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16
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17 def _destupdateobs(repo, clean, check):
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18 """decide of an update destination from obsolescence markers"""
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19 node = None
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20 wc = repo[None]
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21 p1 = wc.p1()
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22 movemark = None
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23
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24 if p1.obsolete() and not p1.children():
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25 # allow updating to successors
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26 successors = obsolete.successorssets(repo, p1.node())
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27
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28 # behavior of certain cases is as follows,
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29 #
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30 # divergent changesets: update to highest rev, similar to what
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31 # is currently done when there are more than one head
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32 # (i.e. 'tip')
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33 #
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34 # replaced changesets: same as divergent except we know there
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35 # is no conflict
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36 #
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37 # pruned changeset: no update is done; though, we could
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38 # consider updating to the first non-obsolete parent,
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39 # similar to what is current done for 'hg prune'
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40
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41 if successors:
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42 # flatten the list here handles both divergent (len > 1)
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43 # and the usual case (len = 1)
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44 successors = [n for sub in successors for n in sub]
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45
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46 # get the max revision for the given successors set,
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47 # i.e. the 'tip' of a set
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48 node = repo.revs('max(%ln)', successors).first()
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49 if bookmarks.isactivewdirparent(repo):
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50 movemark = repo['.'].node()
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51 return node, movemark, None
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52
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53 def _destupdatebook(repo, clean, check):
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54 """decide on an update destination from active bookmark"""
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55 # we also move the active bookmark, if any
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56 activemark = None
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57 node, movemark = bookmarks.calculateupdate(repo.ui, repo, None)
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58 if node is not None:
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59 activemark = node
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60 return node, movemark, activemark
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61
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62 def _destupdatebranch(repo, clean, check):
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63 """decide on an update destination from current branch
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64
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65 This ignores closed branch heads.
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66 """
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67 wc = repo[None]
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68 movemark = node = None
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69 currentbranch = wc.branch()
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70
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71 if clean:
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72 currentbranch = repo['.'].branch()
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73
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74 if currentbranch in repo.branchmap():
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75 heads = repo.branchheads(currentbranch)
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76 if heads:
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77 node = repo.revs('max(.::(%ln))', heads).first()
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78 if bookmarks.isactivewdirparent(repo):
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79 movemark = repo['.'].node()
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80 elif currentbranch == 'default' and not wc.p1():
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81 # "null" parent belongs to "default" branch, but it doesn't exist, so
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82 # update to the tipmost non-closed branch head
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83 node = repo.revs('max(head() and not closed())').first()
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84 else:
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85 node = repo['.'].node()
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86 return node, movemark, None
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87
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88 def _destupdatebranchfallback(repo, clean, check):
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89 """decide on an update destination from closed heads in current branch"""
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90 wc = repo[None]
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91 currentbranch = wc.branch()
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92 movemark = None
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93 if currentbranch in repo.branchmap():
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94 # here, all descendant branch heads are closed
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95 heads = repo.branchheads(currentbranch, closed=True)
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96 assert heads, "any branch has at least one head"
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97 node = repo.revs('max(.::(%ln))', heads).first()
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98 assert node is not None, ("any revision has at least "
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99 "one descendant branch head")
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100 if bookmarks.isactivewdirparent(repo):
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101 movemark = repo['.'].node()
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102 else:
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103 # here, no "default" branch, and all branches are closed
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104 node = repo.lookup('tip')
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105 assert node is not None, "'tip' exists even in empty repository"
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106 return node, movemark, None
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107
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108 # order in which each step should be evaluated
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109 # steps are run until one finds a destination
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110 destupdatesteps = ['evolution', 'bookmark', 'branch', 'branchfallback']
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111 # mapping to ease extension overriding steps.
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112 destupdatestepmap = {'evolution': _destupdateobs,
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113 'bookmark': _destupdatebook,
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114 'branch': _destupdatebranch,
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115 'branchfallback': _destupdatebranchfallback,
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116 }
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117
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118 def destupdate(repo, clean=False, check=False):
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119 """destination for bare update operation
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120
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121 return (rev, movemark, activemark)
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122
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123 - rev: the revision to update to,
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124 - movemark: node to move the active bookmark from
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125 (cf bookmark.calculate update),
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126 - activemark: a bookmark to activate at the end of the update.
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127 """
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128 node = movemark = activemark = None
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129
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130 for step in destupdatesteps:
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131 node, movemark, activemark = destupdatestepmap[step](repo, clean, check)
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132 if node is not None:
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133 break
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134 rev = repo[node].rev()
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135
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136 return rev, movemark, activemark
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137
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138 msgdestmerge = {
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139 # too many matching divergent bookmark
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140 'toomanybookmarks':
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141 {'merge':
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142 (_("multiple matching bookmarks to merge -"
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143 " please merge with an explicit rev or bookmark"),
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144 _("run 'hg heads' to see all heads")),
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145 'rebase':
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146 (_("multiple matching bookmarks to rebase -"
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147 " please rebase to an explicit rev or bookmark"),
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148 _("run 'hg heads' to see all heads")),
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149 },
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150 # no other matching divergent bookmark
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151 'nootherbookmarks':
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152 {'merge':
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153 (_("no matching bookmark to merge - "
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154 "please merge with an explicit rev or bookmark"),
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155 _("run 'hg heads' to see all heads")),
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156 'rebase':
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157 (_("no matching bookmark to rebase - "
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158 "please rebase to an explicit rev or bookmark"),
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159 _("run 'hg heads' to see all heads")),
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160 },
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161 # branch have too many unbookmarked heads, no obvious destination
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162 'toomanyheads':
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163 {'merge':
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164 (_("branch '%s' has %d heads - please merge with an explicit rev"),
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165 _("run 'hg heads .' to see heads")),
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166 'rebase':
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167 (_("branch '%s' has %d heads - please rebase to an explicit rev"),
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168 _("run 'hg heads .' to see heads")),
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169 },
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170 # branch have no other unbookmarked heads
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171 'bookmarkedheads':
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172 {'merge':
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173 (_("heads are bookmarked - please merge with an explicit rev"),
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174 _("run 'hg heads' to see all heads")),
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175 'rebase':
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176 (_("heads are bookmarked - please rebase to an explicit rev"),
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177 _("run 'hg heads' to see all heads")),
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178 },
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179 # branch have just a single heads, but there is other branches
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180 'nootherbranchheads':
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181 {'merge':
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182 (_("branch '%s' has one head - please merge with an explicit rev"),
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183 _("run 'hg heads' to see all heads")),
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184 'rebase':
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185 (_("branch '%s' has one head - please rebase to an explicit rev"),
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186 _("run 'hg heads' to see all heads")),
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187 },
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188 # repository have a single head
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189 'nootherheads':
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190 {'merge':
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191 (_('nothing to merge'),
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192 None),
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193 'rebase':
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194 (_('nothing to rebase'),
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195 None),
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196 },
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197 # repository have a single head and we are not on it
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198 'nootherheadsbehind':
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199 {'merge':
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200 (_('nothing to merge'),
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201 _("use 'hg update' instead")),
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202 'rebase':
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203 (_('nothing to rebase'),
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204 _("use 'hg update' instead")),
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205 },
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206 # We are not on a head
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207 'notatheads':
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208 {'merge':
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209 (_('working directory not at a head revision'),
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210 _("use 'hg update' or merge with an explicit revision")),
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211 'rebase':
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212 (_('working directory not at a head revision'),
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213 _("use 'hg update' or rebase to an explicit revision"))
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214 },
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215 'emptysourceset':
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216 {'merge':
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217 (_('source set is empty'),
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218 None),
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219 'rebase':
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220 (_('source set is empty'),
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221 None),
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222 },
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223 'multiplebranchessourceset':
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224 {'merge':
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225 (_('source set is rooted in multiple branches'),
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226 None),
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227 'rebase':
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228 (_('rebaseset is rooted in multiple named branches'),
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229 _('specify an explicit destination with --dest')),
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230 },
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231 }
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232
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233 def _destmergebook(repo, action='merge', sourceset=None, destspace=None):
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234 """find merge destination in the active bookmark case"""
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235 node = None
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236 bmheads = repo.bookmarkheads(repo._activebookmark)
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237 curhead = repo[repo._activebookmark].node()
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238 if len(bmheads) == 2:
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239 if curhead == bmheads[0]:
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240 node = bmheads[1]
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241 else:
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242 node = bmheads[0]
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diff changeset
243 elif len(bmheads) > 2:
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244 msg, hint = msgdestmerge['toomanybookmarks'][action]
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245 raise error.ManyMergeDestAbort(msg, hint=hint)
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246 elif len(bmheads) <= 1:
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247 msg, hint = msgdestmerge['nootherbookmarks'][action]
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248 raise error.NoMergeDestAbort(msg, hint=hint)
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249 assert node is not None
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250 return node
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251
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252 def _destmergebranch(repo, action='merge', sourceset=None, onheadcheck=True,
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253 destspace=None):
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254 """find merge destination based on branch heads"""
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255 node = None
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256
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257 if sourceset is None:
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258 sourceset = [repo[repo.dirstate.p1()].rev()]
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259 branch = repo.dirstate.branch()
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260 elif not sourceset:
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diff changeset
261 msg, hint = msgdestmerge['emptysourceset'][action]
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diff changeset
262 raise error.NoMergeDestAbort(msg, hint=hint)
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263 else:
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264 branch = None
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265 for ctx in repo.set('roots(%ld::%ld)', sourceset, sourceset):
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266 if branch is not None and ctx.branch() != branch:
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267 msg, hint = msgdestmerge['multiplebranchessourceset'][action]
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268 raise error.ManyMergeDestAbort(msg, hint=hint)
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269 branch = ctx.branch()
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270
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271 bheads = repo.branchheads(branch)
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272 onhead = repo.revs('%ld and %ln', sourceset, bheads)
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273 if onheadcheck and not onhead:
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274 # Case A: working copy if not on a head. (merge only)
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275 #
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276 # This is probably a user mistake We bailout pointing at 'hg update'
28103
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diff changeset
277 if len(repo.heads()) <= 1:
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diff changeset
278 msg, hint = msgdestmerge['nootherheadsbehind'][action]
28103
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diff changeset
279 else:
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diff changeset
280 msg, hint = msgdestmerge['notatheads'][action]
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diff changeset
281 raise error.Abort(msg, hint=hint)
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282 # remove heads descendants of source from the set
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283 bheads = list(repo.revs('%ln - (%ld::)', bheads, sourceset))
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284 # filters out bookmarked heads
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285 nbhs = list(repo.revs('%ld - bookmark()', bheads))
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286
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diff changeset
287 if destspace is not None:
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288 # restrict search space
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289 # used in the 'hg pull --rebase' case, see issue 5214.
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290 nbhs = list(repo.revs('%ld and %ld', destspace, nbhs))
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291
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292 if len(nbhs) > 1:
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293 # Case B: There is more than 1 other anonymous heads
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294 #
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295 # This means that there will be more than 1 candidate. This is
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296 # ambiguous. We abort asking the user to pick as explicit destination
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297 # instead.
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298 msg, hint = msgdestmerge['toomanyheads'][action]
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diff changeset
299 msg %= (branch, len(bheads) + 1)
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300 raise error.ManyMergeDestAbort(msg, hint=hint)
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301 elif not nbhs:
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302 # Case B: There is no other anonymous heads
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303 #
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304 # This means that there is no natural candidate to merge with.
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diff changeset
305 # We abort, with various messages for various cases.
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diff changeset
306 if bheads:
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diff changeset
307 msg, hint = msgdestmerge['bookmarkedheads'][action]
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diff changeset
308 elif len(repo.heads()) > 1:
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diff changeset
309 msg, hint = msgdestmerge['nootherbranchheads'][action]
28102
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diff changeset
310 msg %= branch
28161
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diff changeset
311 elif not onhead:
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diff changeset
312 # if 'onheadcheck == False' (rebase case),
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diff changeset
313 # this was not caught in Case A.
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diff changeset
314 msg, hint = msgdestmerge['nootherheadsbehind'][action]
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diff changeset
315 else:
28137
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diff changeset
316 msg, hint = msgdestmerge['nootherheads'][action]
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diff changeset
317 raise error.NoMergeDestAbort(msg, hint=hint)
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318 else:
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diff changeset
319 node = nbhs[0]
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diff changeset
320 assert node is not None
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diff changeset
321 return node
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diff changeset
322
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diff changeset
323 def destmerge(repo, action='merge', sourceset=None, onheadcheck=True,
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diff changeset
324 destspace=None):
28137
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diff changeset
325 """return the default destination for a merge
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diff changeset
326
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diff changeset
327 (or raise exception about why it can't pick one)
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diff changeset
328
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diff changeset
329 :action: the action being performed, controls emitted error message
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diff changeset
330 """
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diff changeset
331 # destspace is here to work around issues with `hg pull --rebase` see
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diff changeset
332 # issue5214 for details
26714
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diff changeset
333 if repo._activebookmark:
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diff changeset
334 node = _destmergebook(repo, action=action, sourceset=sourceset,
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diff changeset
335 destspace=destspace)
26714
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diff changeset
336 else:
28140
276644ae9e8d destutil: allow to disable the "on head check" in destmerge
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diff changeset
337 node = _destmergebranch(repo, action=action, sourceset=sourceset,
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diff changeset
338 onheadcheck=onheadcheck, destspace=destspace)
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diff changeset
339 return repo[node].rev()
27262
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diff changeset
340
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diff changeset
341 histeditdefaultrevset = 'reverse(only(.) and not public() and not ::merge())'
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diff changeset
342
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diff changeset
343 def desthistedit(ui, repo):
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diff changeset
344 """Default base revision to edit for `hg histedit`."""
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diff changeset
345 # Avoid cycle: scmutil -> revset -> destutil
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diff changeset
346 from . import scmutil
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diff changeset
347
27262
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diff changeset
348 default = ui.config('histedit', 'defaultrev', histeditdefaultrevset)
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diff changeset
349 if default:
27559
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diff changeset
350 revs = scmutil.revrange(repo, [default])
27262
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diff changeset
351 if revs:
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352 # The revset supplied by the user may not be in ascending order nor
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353 # take the first revision. So do this manually.
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354 revs.sort()
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355 return revs.first()
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356
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357 return None
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358
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359 def _statusotherbook(ui, repo):
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360 bmheads = repo.bookmarkheads(repo._activebookmark)
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361 curhead = repo[repo._activebookmark].node()
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362 if repo.revs('%n and parents()', curhead):
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363 # we are on the active bookmark
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364 bmheads = [b for b in bmheads if curhead != b]
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365 if bmheads:
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366 msg = _('%i other divergent bookmarks for "%s"\n')
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367 ui.status(msg % (len(bmheads), repo._activebookmark))
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368
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369 def _statusotherbranchheads(ui, repo):
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370 currentbranch = repo.dirstate.branch()
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parents: 28236
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371 allheads = repo.branchheads(currentbranch, closed=True)
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372 heads = repo.branchheads(currentbranch)
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parents: 28236
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373 if repo.revs('%ln and parents()', allheads):
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parents: 28236
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374 # we are on a head, even though it might be closed
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375 #
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376 # on closed otherheads
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377 # ========= ==========
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378 # o 0 all heads for current branch are closed
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379 # N only descendant branch heads are closed
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parents: 28266
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380 # x 0 there is only one non-closed branch head
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381 # N there are some non-closed branch heads
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382 # ========= ==========
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383 otherheads = repo.revs('%ln - parents()', heads)
28385
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384 if repo['.'].closesbranch():
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FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 28683
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385 ui.warn(_('no open descendant heads on branch "%s", '
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parents: 28385
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386 'updating to a closed head\n') %
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387 (currentbranch))
28385
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388 if otherheads:
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timeless <timeless@mozdev.org>
parents: 29284
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389 ui.warn(_("(committing will reopen the head, "
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timeless <timeless@mozdev.org>
parents: 29284
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390 "use 'hg heads .' to see %i other heads)\n") %
28683
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FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 28385
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391 (len(otherheads)))
28385
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392 else:
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parents: 28683
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393 ui.warn(_('(committing will reopen branch "%s")\n') %
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parents: 28385
diff changeset
394 (currentbranch))
28385
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diff changeset
395 elif otherheads:
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396 ui.status(_('%i other heads for branch "%s"\n') %
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397 (len(otherheads), currentbranch))
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398
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399 def statusotherdests(ui, repo):
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400 """Print message about other head"""
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401 # XXX we should probably include a hint:
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402 # - about what to do
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parents: 27559
diff changeset
403 # - how to see such heads
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diff changeset
404 if repo._activebookmark:
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diff changeset
405 _statusotherbook(ui, repo)
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406 else:
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407 _statusotherbranchheads(ui, repo)