Mercurial > hg
annotate mercurial/destutil.py @ 26725:bde739aced83
destupdate: extract logic based on branch in its own function
One of the main goal of having consolidated destination function is to allow
extension to play with this logic. We extract sub logic to make is wrapping more
practical.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Thu, 15 Oct 2015 02:33:09 +0100 |
parents | 7fc759c0c430 |
children | 8e6649616699 |
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 def destupdate(repo, clean=False, check=False): |
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104 """destination for bare update operation |
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105 |
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106 return (rev, movemark, activemark) |
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107 |
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108 - rev: the revision to update to, |
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109 - movemark: node to move the active bookmark from |
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110 (cf bookmark.calculate update), |
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111 - activemark: a bookmark to activate at the end of the update. |
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112 """ |
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113 node = None |
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114 movemark = activemark = None |
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115 |
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116 node, movemark, activemark = _destupdateobs(repo, clean, check) |
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117 if node is None: |
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118 node, movemark, activemark = _destupdatebook(repo, clean, check) |
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119 if node is None: |
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120 node, movemark, activemark = _destupdatebranch(repo, clean, check) |
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121 rev = repo[node].rev() |
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122 |
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123 _destupdatevalidate(repo, rev, clean, check) |
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124 |
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125 return rev, movemark, activemark |
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126 |
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127 def destmerge(repo): |
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128 if repo._activebookmark: |
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129 bmheads = repo.bookmarkheads(repo._activebookmark) |
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130 curhead = repo[repo._activebookmark].node() |
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131 if len(bmheads) == 2: |
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132 if curhead == bmheads[0]: |
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133 node = bmheads[1] |
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134 else: |
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135 node = bmheads[0] |
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136 elif len(bmheads) > 2: |
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137 raise error.Abort(_("multiple matching bookmarks to merge - " |
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138 "please merge with an explicit rev or bookmark"), |
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139 hint=_("run 'hg heads' to see all heads")) |
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140 elif len(bmheads) <= 1: |
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141 raise error.Abort(_("no matching bookmark to merge - " |
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142 "please merge with an explicit rev or bookmark"), |
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143 hint=_("run 'hg heads' to see all heads")) |
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144 else: |
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145 branch = repo[None].branch() |
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146 bheads = repo.branchheads(branch) |
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147 nbhs = [bh for bh in bheads if not repo[bh].bookmarks()] |
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148 |
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149 if len(nbhs) > 2: |
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150 raise error.Abort(_("branch '%s' has %d heads - " |
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151 "please merge with an explicit rev") |
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152 % (branch, len(bheads)), |
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153 hint=_("run 'hg heads .' to see heads")) |
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154 |
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155 parent = repo.dirstate.p1() |
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156 if len(nbhs) <= 1: |
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157 if len(bheads) > 1: |
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158 raise error.Abort(_("heads are bookmarked - " |
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159 "please merge with an explicit rev"), |
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160 hint=_("run 'hg heads' to see all heads")) |
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161 if len(repo.heads()) > 1: |
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162 raise error.Abort(_("branch '%s' has one head - " |
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163 "please merge with an explicit rev") |
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164 % branch, |
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165 hint=_("run 'hg heads' to see all heads")) |
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166 msg, hint = _('nothing to merge'), None |
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167 if parent != repo.lookup(branch): |
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168 hint = _("use 'hg update' instead") |
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169 raise error.Abort(msg, hint=hint) |
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170 |
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171 if parent not in bheads: |
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172 raise error.Abort(_('working directory not at a head revision'), |
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173 hint=_("use 'hg update' or merge with an " |
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174 "explicit revision")) |
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175 if parent == nbhs[0]: |
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176 node = nbhs[-1] |
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177 else: |
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178 node = nbhs[0] |
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179 return repo[node].rev() |