Mercurial > hg
annotate mercurial/destutil.py @ 28219:97fe88806f6f
check-code: allow old style class with special comments
The following chgserver change will use an old style class to comply with
SocketServer's code style. This patch made it possible to pass check-code.
author | Jun Wu <quark@fb.com> |
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date | Wed, 24 Feb 2016 18:42:14 +0000 |
parents | fac3a24be50e |
children | 9da2283d0c56 |
rev | line source |
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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 _destupdatevalidate(repo, rev, clean, check): |
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18 """validate that the destination comply to various rules |
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19 |
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20 This exists as its own function to help wrapping from extensions.""" |
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21 wc = repo[None] |
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22 p1 = wc.p1() |
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23 if not clean: |
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24 # Check that the update is linear. |
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25 # |
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26 # Mercurial do not allow update-merge for non linear pattern |
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27 # (that would be technically possible but was considered too confusing |
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28 # for user a long time ago) |
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29 # |
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30 # See mercurial.merge.update for details |
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31 if p1.rev() not in repo.changelog.ancestors([rev], inclusive=True): |
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32 dirty = wc.dirty(missing=True) |
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33 foreground = obsolete.foreground(repo, [p1.node()]) |
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34 if not repo[rev].node() in foreground: |
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35 if dirty: |
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36 msg = _("uncommitted changes") |
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37 hint = _("commit and merge, or update --clean to" |
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38 " discard changes") |
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39 raise error.UpdateAbort(msg, hint=hint) |
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40 elif not check: # destination is not a descendant. |
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41 msg = _("not a linear update") |
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42 hint = _("merge or update --check to force update") |
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43 raise error.UpdateAbort(msg, hint=hint) |
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44 |
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45 def _destupdateobs(repo, clean, check): |
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46 """decide of an update destination from obsolescence markers""" |
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47 node = None |
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48 wc = repo[None] |
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49 p1 = wc.p1() |
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50 movemark = None |
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51 |
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52 if p1.obsolete() and not p1.children(): |
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53 # allow updating to successors |
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54 successors = obsolete.successorssets(repo, p1.node()) |
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55 |
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56 # behavior of certain cases is as follows, |
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57 # |
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58 # divergent changesets: update to highest rev, similar to what |
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59 # is currently done when there are more than one head |
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60 # (i.e. 'tip') |
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61 # |
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62 # replaced changesets: same as divergent except we know there |
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63 # is no conflict |
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64 # |
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65 # pruned changeset: no update is done; though, we could |
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66 # consider updating to the first non-obsolete parent, |
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67 # similar to what is current done for 'hg prune' |
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68 |
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69 if successors: |
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70 # flatten the list here handles both divergent (len > 1) |
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71 # and the usual case (len = 1) |
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72 successors = [n for sub in successors for n in sub] |
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73 |
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74 # get the max revision for the given successors set, |
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75 # i.e. the 'tip' of a set |
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76 node = repo.revs('max(%ln)', successors).first() |
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77 if bookmarks.isactivewdirparent(repo): |
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78 movemark = repo['.'].node() |
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79 return node, movemark, None |
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80 |
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81 def _destupdatebook(repo, clean, check): |
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82 """decide on an update destination from active bookmark""" |
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83 # we also move the active bookmark, if any |
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84 activemark = None |
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85 node, movemark = bookmarks.calculateupdate(repo.ui, repo, None) |
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86 if node is not None: |
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87 activemark = node |
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88 return node, movemark, activemark |
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89 |
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90 def _destupdatebranch(repo, clean, check): |
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91 """decide on an update destination from current branch""" |
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92 wc = repo[None] |
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93 movemark = node = None |
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94 try: |
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95 node = repo.revs('max(.::(head() and branch(%s)))' |
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96 , wc.branch()).first() |
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97 if bookmarks.isactivewdirparent(repo): |
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98 movemark = repo['.'].node() |
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99 except error.RepoLookupError: |
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100 if wc.branch() == 'default': # no default branch! |
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101 node = repo.lookup('tip') # update to tip |
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102 else: |
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103 raise error.Abort(_("branch %s not found") % wc.branch()) |
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104 return node, movemark, None |
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105 |
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106 # order in which each step should be evalutated |
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107 # steps are run until one finds a destination |
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108 destupdatesteps = ['evolution', 'bookmark', 'branch'] |
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109 # mapping to ease extension overriding steps. |
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110 destupdatestepmap = {'evolution': _destupdateobs, |
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111 'bookmark': _destupdatebook, |
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112 'branch': _destupdatebranch, |
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113 } |
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114 |
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115 def destupdate(repo, clean=False, check=False): |
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116 """destination for bare update operation |
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117 |
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118 return (rev, movemark, activemark) |
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119 |
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120 - rev: the revision to update to, |
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121 - movemark: node to move the active bookmark from |
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122 (cf bookmark.calculate update), |
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123 - activemark: a bookmark to activate at the end of the update. |
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124 """ |
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125 node = movemark = activemark = None |
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126 |
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127 for step in destupdatesteps: |
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128 node, movemark, activemark = destupdatestepmap[step](repo, clean, check) |
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129 if node is not None: |
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130 break |
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131 rev = repo[node].rev() |
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132 |
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133 _destupdatevalidate(repo, rev, clean, check) |
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134 |
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135 return rev, movemark, activemark |
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136 |
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137 msgdestmerge = { |
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138 # too many matching divergent bookmark |
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139 'toomanybookmarks': |
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140 {'merge': |
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141 (_("multiple matching bookmarks to merge -" |
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142 " please merge with an explicit rev or bookmark"), |
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143 _("run 'hg heads' to see all heads")), |
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144 'rebase': |
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145 (_("multiple matching bookmarks to rebase -" |
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146 " please rebase to an explicit rev or bookmark"), |
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147 _("run 'hg heads' to see all heads")), |
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148 }, |
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149 # no other matching divergent bookmark |
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150 'nootherbookmarks': |
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151 {'merge': |
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152 (_("no matching bookmark to merge - " |
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153 "please merge with an explicit rev or bookmark"), |
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154 _("run 'hg heads' to see all heads")), |
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155 'rebase': |
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156 (_("no matching bookmark to rebase - " |
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157 "please rebase to an explicit rev or bookmark"), |
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158 _("run 'hg heads' to see all heads")), |
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159 }, |
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160 # branch have too many unbookmarked heads, no obvious destination |
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161 'toomanyheads': |
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162 {'merge': |
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163 (_("branch '%s' has %d heads - please merge with an explicit rev"), |
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164 _("run 'hg heads .' to see heads")), |
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165 'rebase': |
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166 (_("branch '%s' has %d heads - please rebase to an explicit rev"), |
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167 _("run 'hg heads .' to see heads")), |
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168 }, |
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169 # branch have no other unbookmarked heads |
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170 'bookmarkedheads': |
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171 {'merge': |
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172 (_("heads are bookmarked - please merge with an explicit rev"), |
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173 _("run 'hg heads' to see all heads")), |
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174 'rebase': |
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175 (_("heads are bookmarked - please rebase to an explicit rev"), |
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176 _("run 'hg heads' to see all heads")), |
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177 }, |
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178 # branch have just a single heads, but there is other branches |
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179 'nootherbranchheads': |
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180 {'merge': |
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181 (_("branch '%s' has one head - please merge with an explicit rev"), |
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182 _("run 'hg heads' to see all heads")), |
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183 'rebase': |
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184 (_("branch '%s' has one head - please rebase to an explicit rev"), |
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185 _("run 'hg heads' to see all heads")), |
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186 }, |
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187 # repository have a single head |
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188 'nootherheads': |
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189 {'merge': |
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190 (_('nothing to merge'), |
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191 None), |
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192 'rebase': |
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193 (_('nothing to rebase'), |
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194 None), |
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195 }, |
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196 # repository have a single head and we are not on it |
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197 'nootherheadsbehind': |
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198 {'merge': |
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199 (_('nothing to merge'), |
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200 _("use 'hg update' instead")), |
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201 'rebase': |
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202 (_('nothing to rebase'), |
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203 _("use 'hg update' instead")), |
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204 }, |
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205 # We are not on a head |
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206 'notatheads': |
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207 {'merge': |
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208 (_('working directory not at a head revision'), |
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209 _("use 'hg update' or merge with an explicit revision")), |
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210 'rebase': |
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211 (_('working directory not at a head revision'), |
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212 _("use 'hg update' or rebase to an explicit revision")) |
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213 }, |
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214 'emptysourceset': |
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215 {'merge': |
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216 (_('source set is empty'), |
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217 None), |
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218 'rebase': |
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219 (_('source set is empty'), |
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220 None), |
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221 }, |
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222 'multiplebranchessourceset': |
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223 {'merge': |
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224 (_('source set is rooted in multiple branches'), |
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225 None), |
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226 'rebase': |
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227 (_('rebaseset is rooted in multiple named branches'), |
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228 _('specify an explicit destination with --dest')), |
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229 }, |
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230 } |
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231 |
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232 def _destmergebook(repo, action='merge', sourceset=None): |
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233 """find merge destination in the active bookmark case""" |
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234 node = None |
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235 bmheads = repo.bookmarkheads(repo._activebookmark) |
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236 curhead = repo[repo._activebookmark].node() |
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237 if len(bmheads) == 2: |
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238 if curhead == bmheads[0]: |
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239 node = bmheads[1] |
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240 else: |
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241 node = bmheads[0] |
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242 elif len(bmheads) > 2: |
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243 msg, hint = msgdestmerge['toomanybookmarks'][action] |
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244 raise error.ManyMergeDestAbort(msg, hint=hint) |
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245 elif len(bmheads) <= 1: |
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246 msg, hint = msgdestmerge['nootherbookmarks'][action] |
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247 raise error.NoMergeDestAbort(msg, hint=hint) |
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248 assert node is not None |
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249 return node |
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250 |
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251 def _destmergebranch(repo, action='merge', sourceset=None, onheadcheck=True): |
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252 """find merge destination based on branch heads""" |
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253 node = None |
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254 |
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255 if sourceset is None: |
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256 sourceset = [repo[repo.dirstate.p1()].rev()] |
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257 branch = repo.dirstate.branch() |
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258 elif not sourceset: |
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259 msg, hint = msgdestmerge['emptysourceset'][action] |
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260 raise error.NoMergeDestAbort(msg, hint=hint) |
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261 else: |
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262 branch = None |
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263 for ctx in repo.set('roots(%ld::%ld)', sourceset, sourceset): |
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264 if branch is not None and ctx.branch() != branch: |
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265 msg, hint = msgdestmerge['multiplebranchessourceset'][action] |
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266 raise error.ManyMergeDestAbort(msg, hint=hint) |
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267 branch = ctx.branch() |
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268 |
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269 bheads = repo.branchheads(branch) |
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270 onhead = repo.revs('%ld and %ln', sourceset, bheads) |
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271 if onheadcheck and not onhead: |
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272 # Case A: working copy if not on a head. (merge only) |
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273 # |
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274 # This is probably a user mistake We bailout pointing at 'hg update' |
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275 if len(repo.heads()) <= 1: |
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276 msg, hint = msgdestmerge['nootherheadsbehind'][action] |
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277 else: |
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278 msg, hint = msgdestmerge['notatheads'][action] |
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279 raise error.Abort(msg, hint=hint) |
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280 # remove heads descendants of source from the set |
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281 bheads = list(repo.revs('%ln - (%ld::)', bheads, sourceset)) |
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282 # filters out bookmarked heads |
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283 nbhs = list(repo.revs('%ld - bookmark()', bheads)) |
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284 if len(nbhs) > 1: |
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285 # Case B: There is more than 1 other anonymous heads |
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286 # |
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287 # This means that there will be more than 1 candidate. This is |
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288 # ambiguous. We abort asking the user to pick as explicit destination |
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289 # instead. |
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290 msg, hint = msgdestmerge['toomanyheads'][action] |
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291 msg %= (branch, len(bheads) + 1) |
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292 raise error.ManyMergeDestAbort(msg, hint=hint) |
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293 elif not nbhs: |
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294 # Case B: There is no other anonymous heads |
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295 # |
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296 # This means that there is no natural candidate to merge with. |
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297 # We abort, with various messages for various cases. |
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298 if bheads: |
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299 msg, hint = msgdestmerge['bookmarkedheads'][action] |
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300 elif len(repo.heads()) > 1: |
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301 msg, hint = msgdestmerge['nootherbranchheads'][action] |
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302 msg %= branch |
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303 elif not onhead: |
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304 # if 'onheadcheck == False' (rebase case), |
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305 # this was not caught in Case A. |
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306 msg, hint = msgdestmerge['nootherheadsbehind'][action] |
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307 else: |
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308 msg, hint = msgdestmerge['nootherheads'][action] |
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309 raise error.NoMergeDestAbort(msg, hint=hint) |
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310 else: |
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311 node = nbhs[0] |
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312 assert node is not None |
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313 return node |
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314 |
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315 def destmerge(repo, action='merge', sourceset=None, onheadcheck=True): |
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316 """return the default destination for a merge |
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317 |
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318 (or raise exception about why it can't pick one) |
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319 |
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320 :action: the action being performed, controls emitted error message |
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321 """ |
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322 if repo._activebookmark: |
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323 node = _destmergebook(repo, action=action, sourceset=sourceset) |
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324 else: |
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325 node = _destmergebranch(repo, action=action, sourceset=sourceset, |
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326 onheadcheck=onheadcheck) |
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327 return repo[node].rev() |
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328 |
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329 histeditdefaultrevset = 'reverse(only(.) and not public() and not ::merge())' |
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330 |
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331 def desthistedit(ui, repo): |
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332 """Default base revision to edit for `hg histedit`.""" |
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333 # Avoid cycle: scmutil -> revset -> destutil |
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334 from . import scmutil |
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335 |
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336 default = ui.config('histedit', 'defaultrev', histeditdefaultrevset) |
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337 if default: |
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338 revs = scmutil.revrange(repo, [default]) |
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339 if revs: |
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340 # The revset supplied by the user may not be in ascending order nor |
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341 # take the first revision. So do this manually. |
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342 revs.sort() |
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343 return revs.first() |
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344 |
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345 return None |
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346 |
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347 def _statusotherbook(ui, repo): |
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348 bmheads = repo.bookmarkheads(repo._activebookmark) |
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349 curhead = repo[repo._activebookmark].node() |
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350 if repo.revs('%n and parents()', curhead): |
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351 # we are on the active bookmark |
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352 bmheads = [b for b in bmheads if curhead != b] |
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353 if bmheads: |
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354 msg = _('%i other divergent bookmarks for "%s"\n') |
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355 ui.status(msg % (len(bmheads), repo._activebookmark)) |
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356 |
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357 def _statusotherbranchheads(ui, repo): |
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358 currentbranch = repo.dirstate.branch() |
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359 heads = repo.branchheads(currentbranch) |
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360 l = len(heads) |
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361 if repo.revs('%ln and parents()', heads): |
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362 # we are on a head |
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363 heads = repo.revs('%ln - parents()', heads) |
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364 if heads and l != len(heads): |
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365 ui.status(_('%i other heads for branch "%s"\n') % |
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366 (len(heads), currentbranch)) |
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367 |
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368 def statusotherdests(ui, repo): |
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369 """Print message about other head""" |
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370 # XXX we should probably include a hint: |
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371 # - about what to do |
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372 # - how to see such heads |
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373 if repo._activebookmark: |
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374 _statusotherbook(ui, repo) |
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375 else: |
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376 _statusotherbranchheads(ui, repo) |