Mercurial > hg
annotate mercurial/destutil.py @ 26878:d7e83f106459
encoding: use getutf8char in toutf8b
This correctly avoids the ambiguity of U+FFFD already present in the
input and similar confusion by working a character at a time.
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 05 Nov 2015 17:21:43 -0600 |
parents | e8f1b7285917 |
children | 3d0feb2f978b |
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 .i18n import _ |
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9 from . import ( |
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10 bookmarks, |
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11 error, |
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12 obsolete, |
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13 ) |
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14 |
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15 def _destupdatevalidate(repo, rev, clean, check): |
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16 """validate that the destination comply to various rules |
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17 |
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18 This exists as its own function to help wrapping from extensions.""" |
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19 wc = repo[None] |
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20 p1 = wc.p1() |
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21 if not clean: |
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22 # Check that the update is linear. |
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23 # |
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24 # Mercurial do not allow update-merge for non linear pattern |
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25 # (that would be technically possible but was considered too confusing |
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26 # for user a long time ago) |
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27 # |
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28 # See mercurial.merge.update for details |
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29 if p1.rev() not in repo.changelog.ancestors([rev], inclusive=True): |
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30 dirty = wc.dirty(missing=True) |
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31 foreground = obsolete.foreground(repo, [p1.node()]) |
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32 if not repo[rev].node() in foreground: |
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33 if dirty: |
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34 msg = _("uncommitted changes") |
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35 hint = _("commit and merge, or update --clean to" |
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36 " discard changes") |
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37 raise error.UpdateAbort(msg, hint=hint) |
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38 elif not check: # destination is not a descendant. |
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39 msg = _("not a linear update") |
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40 hint = _("merge or update --check to force update") |
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41 raise error.UpdateAbort(msg, hint=hint) |
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42 |
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43 def _destupdateobs(repo, clean, check): |
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44 """decide of an update destination from obsolescence markers""" |
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45 node = None |
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46 wc = repo[None] |
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47 p1 = wc.p1() |
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48 movemark = None |
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49 |
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50 if p1.obsolete() and not p1.children(): |
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51 # allow updating to successors |
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52 successors = obsolete.successorssets(repo, p1.node()) |
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53 |
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54 # behavior of certain cases is as follows, |
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55 # |
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56 # divergent changesets: update to highest rev, similar to what |
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57 # is currently done when there are more than one head |
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58 # (i.e. 'tip') |
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59 # |
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60 # replaced changesets: same as divergent except we know there |
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61 # is no conflict |
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62 # |
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63 # pruned changeset: no update is done; though, we could |
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64 # consider updating to the first non-obsolete parent, |
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65 # similar to what is current done for 'hg prune' |
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66 |
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67 if successors: |
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68 # flatten the list here handles both divergent (len > 1) |
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69 # and the usual case (len = 1) |
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70 successors = [n for sub in successors for n in sub] |
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71 |
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72 # get the max revision for the given successors set, |
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73 # i.e. the 'tip' of a set |
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74 node = repo.revs('max(%ln)', successors).first() |
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75 if bookmarks.isactivewdirparent(repo): |
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76 movemark = repo['.'].node() |
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77 return node, movemark, None |
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78 |
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79 def _destupdatebook(repo, clean, check): |
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80 """decide on an update destination from active bookmark""" |
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81 # we also move the active bookmark, if any |
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82 activemark = None |
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83 node, movemark = bookmarks.calculateupdate(repo.ui, repo, None) |
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84 if node is not None: |
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85 activemark = node |
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86 return node, movemark, activemark |
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87 |
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88 def _destupdatebranch(repo, clean, check): |
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89 """decide on an update destination from current branch""" |
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90 wc = repo[None] |
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91 movemark = node = None |
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92 try: |
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93 node = repo.branchtip(wc.branch()) |
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94 if bookmarks.isactivewdirparent(repo): |
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95 movemark = repo['.'].node() |
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96 except error.RepoLookupError: |
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97 if wc.branch() == 'default': # no default branch! |
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98 node = repo.lookup('tip') # update to tip |
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99 else: |
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100 raise error.Abort(_("branch %s not found") % wc.branch()) |
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101 return node, movemark, None |
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102 |
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103 # order in which each step should be evalutated |
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104 # steps are run until one finds a destination |
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105 destupdatesteps = ['evolution', 'bookmark', 'branch'] |
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106 # mapping to ease extension overriding steps. |
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107 destupdatestepmap = {'evolution': _destupdateobs, |
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108 'bookmark': _destupdatebook, |
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109 'branch': _destupdatebranch, |
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110 } |
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111 |
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112 def destupdate(repo, clean=False, check=False): |
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113 """destination for bare update operation |
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114 |
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115 return (rev, movemark, activemark) |
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116 |
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117 - rev: the revision to update to, |
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118 - movemark: node to move the active bookmark from |
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119 (cf bookmark.calculate update), |
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120 - activemark: a bookmark to activate at the end of the update. |
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121 """ |
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122 node = movemark = activemark = None |
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123 |
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124 for step in destupdatesteps: |
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125 node, movemark, activemark = destupdatestepmap[step](repo, clean, check) |
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126 if node is not None: |
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127 break |
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128 rev = repo[node].rev() |
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129 |
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130 _destupdatevalidate(repo, rev, clean, check) |
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131 |
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132 return rev, movemark, activemark |
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133 |
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134 def _destmergebook(repo): |
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135 """find merge destination in the active bookmark case""" |
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136 node = None |
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137 bmheads = repo.bookmarkheads(repo._activebookmark) |
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138 curhead = repo[repo._activebookmark].node() |
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139 if len(bmheads) == 2: |
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140 if curhead == bmheads[0]: |
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141 node = bmheads[1] |
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142 else: |
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143 node = bmheads[0] |
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144 elif len(bmheads) > 2: |
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145 raise error.Abort(_("multiple matching bookmarks to merge - " |
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146 "please merge with an explicit rev or bookmark"), |
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147 hint=_("run 'hg heads' to see all heads")) |
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148 elif len(bmheads) <= 1: |
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149 raise error.Abort(_("no matching bookmark to merge - " |
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150 "please merge with an explicit rev or bookmark"), |
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151 hint=_("run 'hg heads' to see all heads")) |
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152 assert node is not None |
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153 return node |
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154 |
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155 def _destmergebranch(repo): |
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156 """find merge destination based on branch heads""" |
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157 node = None |
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158 branch = repo[None].branch() |
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159 bheads = repo.branchheads(branch) |
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160 nbhs = [bh for bh in bheads if not repo[bh].bookmarks()] |
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161 |
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162 if len(nbhs) > 2: |
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163 raise error.Abort(_("branch '%s' has %d heads - " |
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164 "please merge with an explicit rev") |
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165 % (branch, len(bheads)), |
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166 hint=_("run 'hg heads .' to see heads")) |
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167 |
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168 parent = repo.dirstate.p1() |
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169 if len(nbhs) <= 1: |
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170 if len(bheads) > 1: |
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171 raise error.Abort(_("heads are bookmarked - " |
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172 "please merge with an explicit rev"), |
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173 hint=_("run 'hg heads' to see all heads")) |
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174 if len(repo.heads()) > 1: |
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175 raise error.Abort(_("branch '%s' has one head - " |
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176 "please merge with an explicit rev") |
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177 % branch, |
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178 hint=_("run 'hg heads' to see all heads")) |
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179 msg, hint = _('nothing to merge'), None |
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180 if parent != repo.lookup(branch): |
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181 hint = _("use 'hg update' instead") |
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182 raise error.Abort(msg, hint=hint) |
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183 |
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184 if parent not in bheads: |
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185 raise error.Abort(_('working directory not at a head revision'), |
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186 hint=_("use 'hg update' or merge with an " |
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187 "explicit revision")) |
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188 if parent == nbhs[0]: |
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189 node = nbhs[-1] |
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190 else: |
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191 node = nbhs[0] |
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192 assert node is not None |
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193 return node |
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194 |
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195 def destmerge(repo): |
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196 if repo._activebookmark: |
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197 node = _destmergebook(repo) |
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198 else: |
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199 node = _destmergebranch(repo) |
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200 return repo[node].rev() |