Mercurial > hg
annotate hgext/rebase.py @ 14198:8f11fd321014
commands: use util.Abort's hint some more
author | Martin Geisler <mg@aragost.com> |
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date | Thu, 05 May 2011 14:57:21 +0200 |
parents | e4ffb9576b63 |
children | d68ddccf276b |
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1 # rebase.py - rebasing feature for mercurial |
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2 # |
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3 # Copyright 2008 Stefano Tortarolo <stefano.tortarolo at gmail dot com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 '''command to move sets of revisions to a different ancestor |
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9 |
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10 This extension lets you rebase changesets in an existing Mercurial |
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11 repository. |
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12 |
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13 For more information: |
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14 http://mercurial.selenic.com/wiki/RebaseExtension |
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15 ''' |
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16 |
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17 from mercurial import hg, util, repair, merge, cmdutil, commands |
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18 from mercurial import extensions, copies, patch |
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19 from mercurial.commands import templateopts |
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20 from mercurial.node import nullrev |
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21 from mercurial.lock import release |
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22 from mercurial.i18n import _ |
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23 import os, errno |
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24 |
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25 nullmerge = -2 |
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26 |
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27 def rebase(ui, repo, **opts): |
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28 """move changeset (and descendants) to a different branch |
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29 |
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30 Rebase uses repeated merging to graft changesets from one part of |
10646 | 31 history (the source) onto another (the destination). This can be |
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32 useful for linearizing *local* changes relative to a master |
10646 | 33 development tree. |
34 | |
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35 You should not rebase changesets that have already been shared |
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36 with others. Doing so will force everybody else to perform the |
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37 same rebase or they will end up with duplicated changesets after |
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38 pulling in your rebased changesets. |
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39 |
10646 | 40 If you don't specify a destination changeset (``-d/--dest``), |
41 rebase uses the tipmost head of the current named branch as the | |
42 destination. (The destination changeset is not modified by | |
43 rebasing, but new changesets are added as its descendants.) | |
44 | |
45 You can specify which changesets to rebase in two ways: as a | |
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46 "source" changeset or as a "base" changeset. Both are shorthand |
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47 for a topologically related set of changesets (the "source |
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48 branch"). If you specify source (``-s/--source``), rebase will |
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49 rebase that changeset and all of its descendants onto dest. If you |
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50 specify base (``-b/--base``), rebase will select ancestors of base |
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51 back to but not including the common ancestor with dest. Thus, |
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52 ``-b`` is less precise but more convenient than ``-s``: you can |
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53 specify any changeset in the source branch, and rebase will select |
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54 the whole branch. If you specify neither ``-s`` nor ``-b``, rebase |
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55 uses the parent of the working directory as the base. |
10646 | 56 |
57 By default, rebase recreates the changesets in the source branch | |
58 as descendants of dest and then destroys the originals. Use | |
59 ``--keep`` to preserve the original source changesets. Some | |
60 changesets in the source branch (e.g. merges from the destination | |
61 branch) may be dropped if they no longer contribute any change. | |
62 | |
63 One result of the rules for selecting the destination changeset | |
64 and source branch is that, unlike ``merge``, rebase will do | |
65 nothing if you are at the latest (tipmost) head of a named branch | |
66 with two heads. You need to explicitly specify source and/or | |
67 destination (or ``update`` to the other head, if it's the head of | |
68 the intended source branch). | |
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69 |
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70 If a rebase is interrupted to manually resolve a merge, it can be |
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71 continued with --continue/-c or aborted with --abort/-a. |
11205 | 72 |
73 Returns 0 on success, 1 if nothing to rebase. | |
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74 """ |
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75 originalwd = target = None |
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76 external = nullrev |
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77 state = {} |
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78 skipped = set() |
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79 targetancestors = set() |
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80 |
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81 lock = wlock = None |
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82 try: |
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83 lock = repo.lock() |
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84 wlock = repo.wlock() |
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85 |
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86 # Validate input and define rebasing points |
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87 destf = opts.get('dest', None) |
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88 srcf = opts.get('source', None) |
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89 basef = opts.get('base', None) |
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90 contf = opts.get('continue') |
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91 abortf = opts.get('abort') |
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92 collapsef = opts.get('collapse', False) |
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93 collapsemsg = cmdutil.logmessage(opts) |
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94 extrafn = opts.get('extrafn') # internal, used by e.g. hgsubversion |
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95 keepf = opts.get('keep', False) |
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96 keepbranchesf = opts.get('keepbranches', False) |
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97 detachf = opts.get('detach', False) |
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98 # keepopen is not meant for use on the command line, but by |
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99 # other extensions |
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100 keepopen = opts.get('keepopen', False) |
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101 |
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102 if collapsemsg and not collapsef: |
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103 raise util.Abort( |
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104 _('message can only be specified with collapse')) |
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105 |
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106 if contf or abortf: |
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107 if contf and abortf: |
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108 raise util.Abort(_('cannot use both abort and continue')) |
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109 if collapsef: |
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110 raise util.Abort( |
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111 _('cannot use collapse with continue or abort')) |
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112 if detachf: |
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113 raise util.Abort(_('cannot use detach with continue or abort')) |
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114 if srcf or basef or destf: |
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115 raise util.Abort( |
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116 _('abort and continue do not allow specifying revisions')) |
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117 if opts.get('tool', False): |
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118 ui.warn(_('tool option will be ignored\n')) |
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119 |
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120 (originalwd, target, state, skipped, collapsef, keepf, |
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121 keepbranchesf, external) = restorestatus(repo) |
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122 if abortf: |
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124 else: |
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125 if srcf and basef: |
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126 raise util.Abort(_('cannot specify both a ' |
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127 'revision and a base')) |
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128 if detachf: |
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129 if not srcf: |
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130 raise util.Abort( |
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131 _('detach requires a revision to be specified')) |
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132 if basef: |
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133 raise util.Abort(_('cannot specify a base with detach')) |
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134 |
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135 cmdutil.bail_if_changed(repo) |
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136 result = buildstate(repo, destf, srcf, basef, detachf) |
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137 if not result: |
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138 # Empty state built, nothing to rebase |
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139 ui.status(_('nothing to rebase\n')) |
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141 else: |
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142 originalwd, target, state = result |
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143 if collapsef: |
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144 targetancestors = set(repo.changelog.ancestors(target)) |
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145 external = checkexternal(repo, state, targetancestors) |
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146 |
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147 if keepbranchesf: |
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148 assert not extrafn, 'cannot use both keepbranches and extrafn' |
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149 def extrafn(ctx, extra): |
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150 extra['branch'] = ctx.branch() |
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151 |
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152 # Rebase |
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153 if not targetancestors: |
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154 targetancestors = set(repo.changelog.ancestors(target)) |
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155 targetancestors.add(target) |
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156 |
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157 sortedstate = sorted(state) |
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158 total = len(sortedstate) |
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159 pos = 0 |
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160 for rev in sortedstate: |
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161 pos += 1 |
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162 if state[rev] == -1: |
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163 ui.progress(_("rebasing"), pos, ("%d:%s" % (rev, repo[rev])), |
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164 _('changesets'), total) |
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165 storestatus(repo, originalwd, target, state, collapsef, keepf, |
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166 keepbranchesf, external) |
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167 p1, p2 = defineparents(repo, rev, target, state, |
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168 targetancestors) |
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169 if len(repo.parents()) == 2: |
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170 repo.ui.debug('resuming interrupted rebase\n') |
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171 else: |
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172 try: |
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173 ui.setconfig('ui', 'forcemerge', opts.get('tool', '')) |
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174 stats = rebasenode(repo, rev, p1, state) |
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175 if stats and stats[3] > 0: |
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176 raise util.Abort(_('unresolved conflicts (see hg ' |
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177 'resolve, then hg rebase --continue)')) |
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178 finally: |
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179 ui.setconfig('ui', 'forcemerge', '') |
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180 updatedirstate(repo, rev, target, p2) |
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181 if not collapsef: |
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182 newrev = concludenode(repo, rev, p1, p2, extrafn=extrafn) |
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183 else: |
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184 # Skip commit if we are collapsing |
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185 repo.dirstate.setparents(repo[p1].node()) |
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186 newrev = None |
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187 # Update the state |
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188 if newrev is not None: |
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189 state[rev] = repo[newrev].rev() |
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190 else: |
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191 if not collapsef: |
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192 ui.note(_('no changes, revision %d skipped\n') % rev) |
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193 ui.debug('next revision set to %s\n' % p1) |
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194 skipped.add(rev) |
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195 state[rev] = p1 |
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196 |
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197 ui.progress(_('rebasing'), None) |
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198 ui.note(_('rebase merging completed\n')) |
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199 |
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200 if collapsef and not keepopen: |
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201 p1, p2 = defineparents(repo, min(state), target, |
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202 state, targetancestors) |
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203 if collapsemsg: |
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204 commitmsg = collapsemsg |
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205 else: |
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206 commitmsg = 'Collapsed revision' |
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207 for rebased in state: |
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208 if rebased not in skipped and state[rebased] != nullmerge: |
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209 commitmsg += '\n* %s' % repo[rebased].description() |
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210 commitmsg = ui.edit(commitmsg, repo.ui.username()) |
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211 newrev = concludenode(repo, rev, p1, external, commitmsg=commitmsg, |
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212 extrafn=extrafn) |
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213 |
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214 if 'qtip' in repo.tags(): |
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215 updatemq(repo, state, skipped, **opts) |
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216 |
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217 if not keepf: |
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218 # Remove no more useful revisions |
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219 rebased = [rev for rev in state if state[rev] != nullmerge] |
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220 if rebased: |
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221 if set(repo.changelog.descendants(min(rebased))) - set(state): |
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222 ui.warn(_("warning: new changesets detected " |
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223 "on source branch, not stripping\n")) |
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224 else: |
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225 # backup the old csets by default |
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226 repair.strip(ui, repo, repo[min(rebased)].node(), "all") |
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227 |
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228 clearstatus(repo) |
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229 ui.note(_("rebase completed\n")) |
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230 if os.path.exists(repo.sjoin('undo')): |
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231 util.unlinkpath(repo.sjoin('undo')) |
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232 if skipped: |
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233 ui.note(_("%d revisions have been skipped\n") % len(skipped)) |
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234 finally: |
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235 release(lock, wlock) |
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236 |
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237 def checkexternal(repo, state, targetancestors): |
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238 """Check whether one or more external revisions need to be taken in |
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239 consideration. In the latter case, abort. |
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240 """ |
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241 external = nullrev |
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242 source = min(state) |
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243 for rev in state: |
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244 if rev == source: |
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245 continue |
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246 # Check externals and fail if there are more than one |
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247 for p in repo[rev].parents(): |
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248 if (p.rev() not in state |
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249 and p.rev() not in targetancestors): |
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250 if external != nullrev: |
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251 raise util.Abort(_('unable to collapse, there is more ' |
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252 'than one external parent')) |
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253 external = p.rev() |
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254 return external |
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255 |
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256 def updatedirstate(repo, rev, p1, p2): |
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257 """Keep track of renamed files in the revision that is going to be rebased |
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258 """ |
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259 # Here we simulate the copies and renames in the source changeset |
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260 cop, diver = copies.copies(repo, repo[rev], repo[p1], repo[p2], True) |
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261 m1 = repo[rev].manifest() |
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262 m2 = repo[p1].manifest() |
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263 for k, v in cop.iteritems(): |
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264 if k in m1: |
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265 if v in m1 or v in m2: |
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266 repo.dirstate.copy(v, k) |
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267 if v in m2 and v not in m1 and k in m2: |
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268 repo.dirstate.remove(v) |
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269 |
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270 def concludenode(repo, rev, p1, p2, commitmsg=None, extrafn=None): |
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271 'Commit the changes and store useful information in extra' |
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272 try: |
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273 repo.dirstate.setparents(repo[p1].node(), repo[p2].node()) |
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274 ctx = repo[rev] |
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275 if commitmsg is None: |
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276 commitmsg = ctx.description() |
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277 extra = {'rebase_source': ctx.hex()} |
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278 if extrafn: |
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279 extrafn(ctx, extra) |
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280 # Commit might fail if unresolved files exist |
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281 newrev = repo.commit(text=commitmsg, user=ctx.user(), |
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282 date=ctx.date(), extra=extra) |
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283 repo.dirstate.setbranch(repo[newrev].branch()) |
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284 return newrev |
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285 except util.Abort: |
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286 # Invalidate the previous setparents |
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287 repo.dirstate.invalidate() |
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288 raise |
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289 |
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290 def rebasenode(repo, rev, p1, state): |
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291 'Rebase a single revision' |
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292 # Merge phase |
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293 # Update to target and merge it with local |
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294 if repo['.'].rev() != repo[p1].rev(): |
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295 repo.ui.debug(" update to %d:%s\n" % (repo[p1].rev(), repo[p1])) |
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296 merge.update(repo, p1, False, True, False) |
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297 else: |
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298 repo.ui.debug(" already in target\n") |
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299 repo.dirstate.write() |
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300 repo.ui.debug(" merge against %d:%s\n" % (repo[rev].rev(), repo[rev])) |
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301 base = None |
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302 if repo[rev].rev() != repo[min(state)].rev(): |
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303 base = repo[rev].p1().node() |
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304 return merge.update(repo, rev, True, True, False, base) |
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305 |
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306 def defineparents(repo, rev, target, state, targetancestors): |
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307 'Return the new parent relationship of the revision that will be rebased' |
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308 parents = repo[rev].parents() |
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309 p1 = p2 = nullrev |
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310 |
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311 P1n = parents[0].rev() |
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312 if P1n in targetancestors: |
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313 p1 = target |
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314 elif P1n in state: |
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315 if state[P1n] == nullmerge: |
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316 p1 = target |
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317 else: |
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318 p1 = state[P1n] |
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319 else: # P1n external |
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320 p1 = target |
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321 p2 = P1n |
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322 |
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323 if len(parents) == 2 and parents[1].rev() not in targetancestors: |
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324 P2n = parents[1].rev() |
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325 # interesting second parent |
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326 if P2n in state: |
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327 if p1 == target: # P1n in targetancestors or external |
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328 p1 = state[P2n] |
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329 else: |
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330 p2 = state[P2n] |
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331 else: # P2n external |
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332 if p2 != nullrev: # P1n external too => rev is a merged revision |
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333 raise util.Abort(_('cannot use revision %d as base, result ' |
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334 'would have 3 parents') % rev) |
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335 p2 = P2n |
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336 repo.ui.debug(" future parents are %d and %d\n" % |
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337 (repo[p1].rev(), repo[p2].rev())) |
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338 return p1, p2 |
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339 |
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340 def isagitpatch(repo, patchname): |
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341 'Return true if the given patch is in git format' |
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342 mqpatch = os.path.join(repo.mq.path, patchname) |
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343 for line in patch.linereader(file(mqpatch, 'rb')): |
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344 if line.startswith('diff --git'): |
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345 return True |
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346 return False |
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347 |
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348 def updatemq(repo, state, skipped, **opts): |
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349 'Update rebased mq patches - finalize and then import them' |
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350 mqrebase = {} |
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351 mq = repo.mq |
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352 original_series = mq.full_series[:] |
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353 |
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354 for p in mq.applied: |
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355 rev = repo[p.node].rev() |
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356 if rev in state: |
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357 repo.ui.debug('revision %d is an mq patch (%s), finalize it.\n' % |
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358 (rev, p.name)) |
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359 mqrebase[rev] = (p.name, isagitpatch(repo, p.name)) |
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360 |
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361 if mqrebase: |
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362 mq.finish(repo, mqrebase.keys()) |
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363 |
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364 # We must start import from the newest revision |
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365 for rev in sorted(mqrebase, reverse=True): |
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366 if rev not in skipped: |
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367 name, isgit = mqrebase[rev] |
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368 repo.ui.debug('import mq patch %d (%s)\n' % (state[rev], name)) |
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369 mq.qimport(repo, (), patchname=name, git=isgit, |
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370 rev=[str(state[rev])]) |
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371 |
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372 # Restore missing guards |
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373 for s in original_series: |
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374 pname = mq.guard_re.split(s, 1)[0] |
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375 if pname in mq.full_series: |
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376 repo.ui.debug('restoring guard for patch %s' % (pname)) |
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377 mq.full_series.remove(pname) |
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378 mq.full_series.append(s) |
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379 mq.series_dirty = True |
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380 mq.save_dirty() |
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381 |
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382 def storestatus(repo, originalwd, target, state, collapse, keep, keepbranches, |
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383 external): |
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384 'Store the current status to allow recovery' |
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385 f = repo.opener("rebasestate", "w") |
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386 f.write(repo[originalwd].hex() + '\n') |
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387 f.write(repo[target].hex() + '\n') |
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388 f.write(repo[external].hex() + '\n') |
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389 f.write('%d\n' % int(collapse)) |
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390 f.write('%d\n' % int(keep)) |
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391 f.write('%d\n' % int(keepbranches)) |
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392 for d, v in state.iteritems(): |
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393 oldrev = repo[d].hex() |
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394 newrev = repo[v].hex() |
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395 f.write("%s:%s\n" % (oldrev, newrev)) |
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396 f.close() |
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397 repo.ui.debug('rebase status stored\n') |
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398 |
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399 def clearstatus(repo): |
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400 'Remove the status files' |
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401 if os.path.exists(repo.join("rebasestate")): |
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402 util.unlinkpath(repo.join("rebasestate")) |
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403 |
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404 def restorestatus(repo): |
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405 'Restore a previously stored status' |
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406 try: |
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407 target = None |
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408 collapse = False |
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409 external = nullrev |
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410 state = {} |
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411 f = repo.opener("rebasestate") |
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412 for i, l in enumerate(f.read().splitlines()): |
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413 if i == 0: |
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414 originalwd = repo[l].rev() |
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415 elif i == 1: |
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416 target = repo[l].rev() |
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417 elif i == 2: |
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418 external = repo[l].rev() |
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419 elif i == 3: |
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420 collapse = bool(int(l)) |
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421 elif i == 4: |
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422 keep = bool(int(l)) |
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423 elif i == 5: |
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424 keepbranches = bool(int(l)) |
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425 else: |
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426 oldrev, newrev = l.split(':') |
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427 state[repo[oldrev].rev()] = repo[newrev].rev() |
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428 skipped = set() |
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429 # recompute the set of skipped revs |
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430 if not collapse: |
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431 seen = set([target]) |
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432 for old, new in sorted(state.items()): |
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433 if new != nullrev and new in seen: |
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434 skipped.add(old) |
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435 seen.add(new) |
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436 repo.ui.debug('computed skipped revs: %s\n' % skipped) |
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437 repo.ui.debug('rebase status resumed\n') |
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438 return (originalwd, target, state, skipped, |
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439 collapse, keep, keepbranches, external) |
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440 except IOError, err: |
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441 if err.errno != errno.ENOENT: |
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442 raise |
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443 raise util.Abort(_('no rebase in progress')) |
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444 |
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445 def abort(repo, originalwd, target, state): |
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446 'Restore the repository to its original state' |
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447 if set(repo.changelog.descendants(target)) - set(state.values()): |
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448 repo.ui.warn(_("warning: new changesets detected on target branch, " |
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449 "can't abort\n")) |
11205 | 450 return -1 |
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451 else: |
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452 # Strip from the first rebased revision |
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453 merge.update(repo, repo[originalwd].rev(), False, True, False) |
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454 rebased = filter(lambda x: x > -1 and x != target, state.values()) |
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455 if rebased: |
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456 strippoint = min(rebased) |
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457 # no backup of rebased cset versions needed |
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458 repair.strip(repo.ui, repo, repo[strippoint].node()) |
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459 clearstatus(repo) |
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460 repo.ui.warn(_('rebase aborted\n')) |
11205 | 461 return 0 |
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462 |
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463 def buildstate(repo, dest, src, base, detach): |
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464 'Define which revisions are going to be rebased and where' |
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465 targetancestors = set() |
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466 detachset = set() |
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467 |
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468 if not dest: |
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469 # Destination defaults to the latest revision in the current branch |
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470 branch = repo[None].branch() |
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471 dest = repo[branch].rev() |
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472 else: |
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473 dest = repo[dest].rev() |
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474 |
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475 # This check isn't strictly necessary, since mq detects commits over an |
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476 # applied patch. But it prevents messing up the working directory when |
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477 # a partially completed rebase is blocked by mq. |
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478 if 'qtip' in repo.tags() and (repo[dest].node() in |
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479 [s.node for s in repo.mq.applied]): |
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480 raise util.Abort(_('cannot rebase onto an applied mq patch')) |
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481 |
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482 if src: |
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483 commonbase = repo[src].ancestor(repo[dest]) |
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484 samebranch = repo[src].branch() == repo[dest].branch() |
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485 if commonbase == repo[src]: |
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486 raise util.Abort(_('source is ancestor of destination')) |
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487 if samebranch and commonbase == repo[dest]: |
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488 raise util.Abort(_('source is descendant of destination')) |
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489 source = repo[src].rev() |
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490 if detach: |
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491 # We need to keep track of source's ancestors up to the common base |
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492 srcancestors = set(repo.changelog.ancestors(source)) |
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493 baseancestors = set(repo.changelog.ancestors(commonbase.rev())) |
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494 detachset = srcancestors - baseancestors |
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495 detachset.discard(commonbase.rev()) |
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496 else: |
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497 if base: |
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498 cwd = repo[base].rev() |
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499 else: |
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500 cwd = repo['.'].rev() |
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501 |
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502 if cwd == dest: |
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503 repo.ui.debug('source and destination are the same\n') |
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504 return None |
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505 |
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506 targetancestors = set(repo.changelog.ancestors(dest)) |
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507 if cwd in targetancestors: |
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508 repo.ui.debug('source is ancestor of destination\n') |
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509 return None |
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510 |
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511 cwdancestors = set(repo.changelog.ancestors(cwd)) |
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512 if dest in cwdancestors: |
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513 repo.ui.debug('source is descendant of destination\n') |
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514 return None |
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515 |
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516 cwdancestors.add(cwd) |
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517 rebasingbranch = cwdancestors - targetancestors |
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518 source = min(rebasingbranch) |
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519 |
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520 repo.ui.debug('rebase onto %d starting from %d\n' % (dest, source)) |
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521 state = dict.fromkeys(repo.changelog.descendants(source), nullrev) |
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522 state.update(dict.fromkeys(detachset, nullmerge)) |
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523 state[source] = nullrev |
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524 return repo['.'].rev(), repo[dest].rev(), state |
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525 |
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526 def pullrebase(orig, ui, repo, *args, **opts): |
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527 'Call rebase after pull if the latter has been invoked with --rebase' |
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528 if opts.get('rebase'): |
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529 if opts.get('update'): |
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530 del opts['update'] |
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531 ui.debug('--update and --rebase are not compatible, ignoring ' |
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532 'the update flag\n') |
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533 |
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534 cmdutil.bail_if_changed(repo) |
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535 revsprepull = len(repo) |
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536 origpostincoming = commands.postincoming |
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537 def _dummy(*args, **kwargs): |
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538 pass |
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539 commands.postincoming = _dummy |
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540 try: |
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541 orig(ui, repo, *args, **opts) |
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542 finally: |
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543 commands.postincoming = origpostincoming |
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544 revspostpull = len(repo) |
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545 if revspostpull > revsprepull: |
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546 rebase(ui, repo, **opts) |
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547 branch = repo[None].branch() |
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548 dest = repo[branch].rev() |
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549 if dest != repo['.'].rev(): |
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550 # there was nothing to rebase we force an update |
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551 hg.update(repo, dest) |
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552 else: |
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553 orig(ui, repo, *args, **opts) |
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554 |
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555 def uisetup(ui): |
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556 'Replace pull with a decorator to provide --rebase option' |
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557 entry = extensions.wrapcommand(commands.table, 'pull', pullrebase) |
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558 entry[1].append(('', 'rebase', None, |
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559 _("rebase working directory to branch head")) |
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560 ) |
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561 |
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562 cmdtable = { |
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563 "rebase": |
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564 (rebase, |
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565 [ |
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566 ('s', 'source', '', |
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567 _('rebase from the specified changeset'), _('REV')), |
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568 ('b', 'base', '', |
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|
569 _('rebase from the base of the specified changeset ' |
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570 '(up to greatest common ancestor of base and dest)'), |
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571 _('REV')), |
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572 ('d', 'dest', '', |
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573 _('rebase onto the specified changeset'), _('REV')), |
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timeless@mozdev.org
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574 ('', 'collapse', False, _('collapse the rebased changesets')), |
13661
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parents:
13609
diff
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|
575 ('m', 'message', '', |
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Radomir Dopieralski <sheep@stxnext.pl>
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576 _('use text as collapse commit message'), _('TEXT')), |
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Radomir Dopieralski <sheep@stxnext.pl>
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diff
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|
577 ('l', 'logfile', '', |
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|
578 _('read collapse commit message from file'), _('FILE')), |
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timeless@mozdev.org
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579 ('', 'keep', False, _('keep original changesets')), |
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580 ('', 'keepbranches', False, _('keep original branch names')), |
10352
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|
581 ('', 'detach', False, _('force detaching of source from its original ' |
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|
582 'branch')), |
13856
0995eee8ffe4
rebase: add --tool argument for specifying merge tool
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parents:
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diff
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|
583 ('t', 'tool', '', _('specify merge tool')), |
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584 ('c', 'continue', False, _('continue an interrupted rebase')), |
10413
e433002acb05
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Matt Mackall <mpm@selenic.com>
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|
585 ('a', 'abort', False, _('abort an interrupted rebase'))] + |
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|
586 templateopts, |
10646 | 587 _('hg rebase [-s REV | -b REV] [-d REV] [options]\n' |
588 'hg rebase {-a|-c}')) | |
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589 } |