Mercurial > hg
annotate hgext/rebase.py @ 9196:07d127e771a1
merge with crew-stable
author | Martin Geisler <mg@lazybytes.net> |
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date | Wed, 22 Jul 2009 22:56:45 +0200 |
parents | ec1cd3176625 d0225fa2f6c4 |
children | 4ea022359c43 |
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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 |
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6 # GNU General Public License version 2, incorporated herein by reference. |
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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 repository. |
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11 |
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12 For more information: |
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13 http://mercurial.selenic.com/wiki/RebaseProject |
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14 ''' |
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15 |
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17 from mercurial import extensions, ancestor, copies, patch |
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18 from mercurial.commands import templateopts |
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19 from mercurial.node import nullrev |
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20 from mercurial.lock import release |
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21 from mercurial.i18n import _ |
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22 import os, errno |
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23 |
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24 def rebasemerge(repo, rev, first=False): |
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25 'return the correct ancestor' |
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26 oldancestor = ancestor.ancestor |
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27 |
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28 def newancestor(a, b, pfunc): |
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29 ancestor.ancestor = oldancestor |
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30 if b == rev: |
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31 return repo[rev].parents()[0].rev() |
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32 return ancestor.ancestor(a, b, pfunc) |
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33 |
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34 if not first: |
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35 ancestor.ancestor = newancestor |
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36 else: |
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37 repo.ui.debug(_("first revision, do not change ancestor\n")) |
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38 stats = merge.update(repo, rev, True, True, False) |
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39 return stats |
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40 |
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41 def rebase(ui, repo, **opts): |
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42 """move changeset (and descendants) to a different branch |
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43 |
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44 Rebase uses repeated merging to graft changesets from one part of history |
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45 onto another. This can be useful for linearizing local changes relative to |
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46 a master development tree. |
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47 |
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48 If a rebase is interrupted to manually resolve a merge, it can be |
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49 continued with --continue/-c or aborted with --abort/-a. |
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50 """ |
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51 originalwd = target = None |
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52 external = nullrev |
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53 state = {} |
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54 skipped = set() |
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55 |
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56 lock = wlock = None |
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57 try: |
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58 lock = repo.lock() |
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59 wlock = repo.wlock() |
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60 |
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61 # Validate input and define rebasing points |
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62 destf = opts.get('dest', None) |
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63 srcf = opts.get('source', None) |
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64 basef = opts.get('base', None) |
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65 contf = opts.get('continue') |
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66 abortf = opts.get('abort') |
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67 collapsef = opts.get('collapse', False) |
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68 extrafn = opts.get('extrafn') |
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69 keepf = opts.get('keep', False) |
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70 keepbranchesf = opts.get('keepbranches', False) |
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71 |
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72 if contf or abortf: |
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73 if contf and abortf: |
7636 | 74 raise error.ParseError('rebase', |
75 _('cannot use both abort and continue')) | |
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76 if collapsef: |
7636 | 77 raise error.ParseError( |
78 'rebase', _('cannot use collapse with continue or abort')) | |
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79 |
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80 if srcf or basef or destf: |
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82 _('abort and continue do not allow specifying revisions')) |
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83 |
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84 (originalwd, target, state, collapsef, keepf, |
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85 keepbranchesf, external) = restorestatus(repo) |
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86 if abortf: |
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87 abort(repo, originalwd, target, state) |
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88 return |
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89 else: |
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90 if srcf and basef: |
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92 'revision and a base')) | |
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93 cmdutil.bail_if_changed(repo) |
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94 result = buildstate(repo, destf, srcf, basef, collapsef) |
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95 if result: |
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96 originalwd, target, state, external = result |
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97 else: # Empty state built, nothing to rebase |
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98 ui.status(_('nothing to rebase\n')) |
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99 return |
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100 |
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101 if keepbranchesf: |
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102 if extrafn: |
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103 raise error.ParseError( |
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104 'rebase', _('cannot use both keepbranches and extrafn')) |
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105 def extrafn(ctx, extra): |
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106 extra['branch'] = ctx.branch() |
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107 |
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108 # Rebase |
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109 targetancestors = list(repo.changelog.ancestors(target)) |
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110 targetancestors.append(target) |
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111 |
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112 for rev in sorted(state): |
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113 if state[rev] == -1: |
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114 storestatus(repo, originalwd, target, state, collapsef, keepf, |
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115 keepbranchesf, external) |
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116 rebasenode(repo, rev, target, state, skipped, targetancestors, |
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117 collapsef, extrafn) |
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118 ui.note(_('rebase merging completed\n')) |
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119 |
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120 if collapsef: |
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121 p1, p2 = defineparents(repo, min(state), target, |
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122 state, targetancestors) |
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123 concludenode(repo, rev, p1, external, state, collapsef, |
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124 last=True, skipped=skipped, extrafn=extrafn) |
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125 |
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126 if 'qtip' in repo.tags(): |
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127 updatemq(repo, state, skipped, **opts) |
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128 |
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129 if not keepf: |
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130 # Remove no more useful revisions |
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131 if set(repo.changelog.descendants(min(state))) - set(state): |
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132 ui.warn(_("warning: new changesets detected on source branch, " |
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133 "not stripping\n")) |
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134 else: |
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135 repair.strip(ui, repo, repo[min(state)].node(), "strip") |
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136 |
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137 clearstatus(repo) |
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138 ui.status(_("rebase completed\n")) |
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139 if os.path.exists(repo.sjoin('undo')): |
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140 util.unlink(repo.sjoin('undo')) |
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141 if skipped: |
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142 ui.note(_("%d revisions have been skipped\n") % len(skipped)) |
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143 finally: |
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144 release(lock, wlock) |
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145 |
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146 def concludenode(repo, rev, p1, p2, state, collapse, last=False, skipped=None, |
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147 extrafn=None): |
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148 """Skip commit if collapsing has been required and rev is not the last |
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149 revision, commit otherwise |
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150 """ |
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151 repo.ui.debug(_(" set parents\n")) |
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152 if collapse and not last: |
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153 repo.dirstate.setparents(repo[p1].node()) |
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154 return None |
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155 |
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156 repo.dirstate.setparents(repo[p1].node(), repo[p2].node()) |
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157 |
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158 if skipped is None: |
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159 skipped = set() |
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160 |
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161 # Commit, record the old nodeid |
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162 newrev = nullrev |
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163 try: |
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164 if last: |
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165 # we don't translate commit messages |
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166 commitmsg = 'Collapsed revision' |
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167 for rebased in state: |
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168 if rebased not in skipped: |
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169 commitmsg += '\n* %s' % repo[rebased].description() |
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170 commitmsg = repo.ui.edit(commitmsg, repo.ui.username()) |
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171 else: |
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172 commitmsg = repo[rev].description() |
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173 # Commit might fail if unresolved files exist |
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174 extra = {'rebase_source': repo[rev].hex()} |
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175 if extrafn: |
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176 extrafn(repo[rev], extra) |
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177 newrev = repo.commit(text=commitmsg, user=repo[rev].user(), |
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178 date=repo[rev].date(), extra=extra) |
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179 repo.dirstate.setbranch(repo[newrev].branch()) |
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180 return newrev |
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181 except util.Abort: |
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182 # Invalidate the previous setparents |
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183 repo.dirstate.invalidate() |
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184 raise |
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185 |
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186 def rebasenode(repo, rev, target, state, skipped, targetancestors, collapse, |
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187 extrafn): |
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188 'Rebase a single revision' |
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189 repo.ui.debug(_("rebasing %d:%s\n") % (rev, repo[rev])) |
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190 |
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191 p1, p2 = defineparents(repo, rev, target, state, targetancestors) |
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192 |
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193 repo.ui.debug(_(" future parents are %d and %d\n") % (repo[p1].rev(), |
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194 repo[p2].rev())) |
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195 |
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196 # Merge phase |
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197 if len(repo.parents()) != 2: |
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198 # Update to target and merge it with local |
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199 if repo['.'].rev() != repo[p1].rev(): |
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200 repo.ui.debug(_(" update to %d:%s\n") % (repo[p1].rev(), repo[p1])) |
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201 merge.update(repo, p1, False, True, False) |
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202 else: |
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203 repo.ui.debug(_(" already in target\n")) |
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204 repo.dirstate.write() |
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205 repo.ui.debug(_(" merge against %d:%s\n") % (repo[rev].rev(), repo[rev])) |
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206 first = repo[rev].rev() == repo[min(state)].rev() |
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207 stats = rebasemerge(repo, rev, first) |
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208 |
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209 if stats[3] > 0: |
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210 raise util.Abort(_('fix unresolved conflicts with hg resolve then ' |
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211 'run hg rebase --continue')) |
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212 else: # we have an interrupted rebase |
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213 repo.ui.debug(_('resuming interrupted rebase\n')) |
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214 |
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215 # Keep track of renamed files in the revision that is going to be rebased |
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216 # Here we simulate the copies and renames in the source changeset |
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217 cop, diver = copies.copies(repo, repo[rev], repo[target], repo[p2], True) |
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218 m1 = repo[rev].manifest() |
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219 m2 = repo[target].manifest() |
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220 for k, v in cop.iteritems(): |
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221 if k in m1: |
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222 if v in m1 or v in m2: |
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223 repo.dirstate.copy(v, k) |
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224 if v in m2 and v not in m1: |
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225 repo.dirstate.remove(v) |
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226 |
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227 newrev = concludenode(repo, rev, p1, p2, state, collapse, |
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228 extrafn=extrafn) |
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229 |
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230 # Update the state |
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231 if newrev is not None: |
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232 state[rev] = repo[newrev].rev() |
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233 else: |
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234 if not collapse: |
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235 repo.ui.note(_('no changes, revision %d skipped\n') % rev) |
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236 repo.ui.debug(_('next revision set to %s\n') % p1) |
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237 skipped.add(rev) |
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238 state[rev] = p1 |
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239 |
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240 def defineparents(repo, rev, target, state, targetancestors): |
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241 'Return the new parent relationship of the revision that will be rebased' |
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242 parents = repo[rev].parents() |
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243 p1 = p2 = nullrev |
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244 |
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245 P1n = parents[0].rev() |
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246 if P1n in targetancestors: |
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247 p1 = target |
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248 elif P1n in state: |
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249 p1 = state[P1n] |
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250 else: # P1n external |
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251 p1 = target |
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252 p2 = P1n |
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253 |
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254 if len(parents) == 2 and parents[1].rev() not in targetancestors: |
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255 P2n = parents[1].rev() |
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256 # interesting second parent |
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257 if P2n in state: |
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258 if p1 == target: # P1n in targetancestors or external |
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259 p1 = state[P2n] |
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260 else: |
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261 p2 = state[P2n] |
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262 else: # P2n external |
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263 if p2 != nullrev: # P1n external too => rev is a merged revision |
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264 raise util.Abort(_('cannot use revision %d as base, result ' |
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265 'would have 3 parents') % rev) |
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266 p2 = P2n |
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267 return p1, p2 |
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268 |
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269 def isagitpatch(repo, patchname): |
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270 'Return true if the given patch is in git format' |
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271 mqpatch = os.path.join(repo.mq.path, patchname) |
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272 for line in patch.linereader(file(mqpatch, 'rb')): |
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273 if line.startswith('diff --git'): |
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274 return True |
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275 return False |
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276 |
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277 def updatemq(repo, state, skipped, **opts): |
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278 'Update rebased mq patches - finalize and then import them' |
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279 mqrebase = {} |
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280 for p in repo.mq.applied: |
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281 if repo[p.rev].rev() in state: |
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282 repo.ui.debug(_('revision %d is an mq patch (%s), finalize it.\n') % |
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283 (repo[p.rev].rev(), p.name)) |
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284 mqrebase[repo[p.rev].rev()] = (p.name, isagitpatch(repo, p.name)) |
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285 |
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286 if mqrebase: |
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287 repo.mq.finish(repo, mqrebase.keys()) |
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288 |
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289 # We must start import from the newest revision |
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290 for rev in sorted(mqrebase, reverse=True): |
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291 if rev not in skipped: |
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292 repo.ui.debug(_('import mq patch %d (%s)\n') |
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293 % (state[rev], mqrebase[rev][0])) |
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294 repo.mq.qimport(repo, (), patchname=mqrebase[rev][0], |
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295 git=mqrebase[rev][1],rev=[str(state[rev])]) |
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296 repo.mq.save_dirty() |
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297 |
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298 def storestatus(repo, originalwd, target, state, collapse, keep, keepbranches, |
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299 external): |
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300 'Store the current status to allow recovery' |
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301 f = repo.opener("rebasestate", "w") |
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302 f.write(repo[originalwd].hex() + '\n') |
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303 f.write(repo[target].hex() + '\n') |
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304 f.write(repo[external].hex() + '\n') |
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305 f.write('%d\n' % int(collapse)) |
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306 f.write('%d\n' % int(keep)) |
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307 f.write('%d\n' % int(keepbranches)) |
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308 for d, v in state.iteritems(): |
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309 oldrev = repo[d].hex() |
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310 newrev = repo[v].hex() |
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311 f.write("%s:%s\n" % (oldrev, newrev)) |
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312 f.close() |
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313 repo.ui.debug(_('rebase status stored\n')) |
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314 |
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315 def clearstatus(repo): |
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316 'Remove the status files' |
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317 if os.path.exists(repo.join("rebasestate")): |
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318 util.unlink(repo.join("rebasestate")) |
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319 |
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320 def restorestatus(repo): |
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321 'Restore a previously stored status' |
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322 try: |
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323 target = None |
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324 collapse = False |
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325 external = nullrev |
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326 state = {} |
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327 f = repo.opener("rebasestate") |
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328 for i, l in enumerate(f.read().splitlines()): |
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329 if i == 0: |
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330 originalwd = repo[l].rev() |
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331 elif i == 1: |
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332 target = repo[l].rev() |
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333 elif i == 2: |
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334 external = repo[l].rev() |
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335 elif i == 3: |
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336 collapse = bool(int(l)) |
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337 elif i == 4: |
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338 keep = bool(int(l)) |
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339 elif i == 5: |
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340 keepbranches = bool(int(l)) |
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341 else: |
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342 oldrev, newrev = l.split(':') |
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343 state[repo[oldrev].rev()] = repo[newrev].rev() |
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344 repo.ui.debug(_('rebase status resumed\n')) |
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345 return originalwd, target, state, collapse, keep, keepbranches, external |
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346 except IOError, err: |
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347 if err.errno != errno.ENOENT: |
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348 raise |
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349 raise util.Abort(_('no rebase in progress')) |
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350 |
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351 def abort(repo, originalwd, target, state): |
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352 'Restore the repository to its original state' |
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353 if set(repo.changelog.descendants(target)) - set(state.values()): |
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354 repo.ui.warn(_("warning: new changesets detected on target branch, " |
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355 "not stripping\n")) |
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356 else: |
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357 # Strip from the first rebased revision |
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358 merge.update(repo, repo[originalwd].rev(), False, True, False) |
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359 rebased = filter(lambda x: x > -1, state.values()) |
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360 if rebased: |
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361 strippoint = min(rebased) |
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362 repair.strip(repo.ui, repo, repo[strippoint].node(), "strip") |
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363 clearstatus(repo) |
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364 repo.ui.status(_('rebase aborted\n')) |
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365 |
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366 def buildstate(repo, dest, src, base, collapse): |
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367 'Define which revisions are going to be rebased and where' |
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368 targetancestors = set() |
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369 |
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370 if not dest: |
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371 # Destination defaults to the latest revision in the current branch |
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372 branch = repo[None].branch() |
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373 dest = repo[branch].rev() |
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374 else: |
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375 if 'qtip' in repo.tags() and (repo[dest].hex() in |
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376 [s.rev for s in repo.mq.applied]): |
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377 raise util.Abort(_('cannot rebase onto an applied mq patch')) |
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378 dest = repo[dest].rev() |
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379 |
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380 if src: |
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381 commonbase = repo[src].ancestor(repo[dest]) |
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382 if commonbase == repo[src]: |
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383 raise util.Abort(_('cannot rebase an ancestor')) |
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384 if commonbase == repo[dest]: |
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385 raise util.Abort(_('cannot rebase a descendant')) |
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386 source = repo[src].rev() |
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387 else: |
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388 if base: |
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389 cwd = repo[base].rev() |
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390 else: |
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391 cwd = repo['.'].rev() |
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392 |
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393 if cwd == dest: |
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394 repo.ui.debug(_('already working on current\n')) |
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395 return None |
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396 |
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397 targetancestors = set(repo.changelog.ancestors(dest)) |
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398 if cwd in targetancestors: |
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399 repo.ui.debug(_('already working on the current branch\n')) |
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400 return None |
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401 |
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402 cwdancestors = set(repo.changelog.ancestors(cwd)) |
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403 cwdancestors.add(cwd) |
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404 rebasingbranch = cwdancestors - targetancestors |
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405 source = min(rebasingbranch) |
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406 |
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407 repo.ui.debug(_('rebase onto %d starting from %d\n') % (dest, source)) |
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408 state = dict.fromkeys(repo.changelog.descendants(source), nullrev) |
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409 external = nullrev |
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410 if collapse: |
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411 if not targetancestors: |
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412 targetancestors = set(repo.changelog.ancestors(dest)) |
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413 for rev in state: |
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414 # Check externals and fail if there are more than one |
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415 for p in repo[rev].parents(): |
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416 if (p.rev() not in state and p.rev() != source |
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417 and p.rev() not in targetancestors): |
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418 if external != nullrev: |
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419 raise util.Abort(_('unable to collapse, there is more ' |
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420 'than one external parent')) |
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421 external = p.rev() |
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422 |
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423 state[source] = nullrev |
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424 return repo['.'].rev(), repo[dest].rev(), state, external |
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425 |
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426 def pullrebase(orig, ui, repo, *args, **opts): |
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427 'Call rebase after pull if the latter has been invoked with --rebase' |
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428 if opts.get('rebase'): |
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429 if opts.get('update'): |
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430 del opts['update'] |
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431 ui.debug(_('--update and --rebase are not compatible, ignoring ' |
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432 'the update flag\n')) |
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433 |
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434 cmdutil.bail_if_changed(repo) |
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435 revsprepull = len(repo) |
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436 orig(ui, repo, *args, **opts) |
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437 revspostpull = len(repo) |
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438 if revspostpull > revsprepull: |
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439 rebase(ui, repo, **opts) |
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440 branch = repo[None].branch() |
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441 dest = repo[branch].rev() |
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442 if dest != repo['.'].rev(): |
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443 # there was nothing to rebase we force an update |
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444 merge.update(repo, dest, False, False, False) |
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445 else: |
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446 orig(ui, repo, *args, **opts) |
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447 |
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448 def uisetup(ui): |
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449 'Replace pull with a decorator to provide --rebase option' |
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450 entry = extensions.wrapcommand(commands.table, 'pull', pullrebase) |
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451 entry[1].append(('', 'rebase', None, |
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452 _("rebase working directory to branch head")) |
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453 ) |
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454 |
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455 cmdtable = { |
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456 "rebase": |
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457 (rebase, |
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458 [ |
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459 ('s', 'source', '', _('rebase from a given revision')), |
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460 ('b', 'base', '', _('rebase from the base of a given revision')), |
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461 ('d', 'dest', '', _('rebase onto a given revision')), |
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462 ('', 'collapse', False, _('collapse the rebased revisions')), |
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463 ('', 'keep', False, _('keep original revisions')), |
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464 ('', 'keepbranches', False, _('keep original branches')), |
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465 ('c', 'continue', False, _('continue an interrupted rebase')), |
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466 ('a', 'abort', False, _('abort an interrupted rebase')),] + |
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467 templateopts, |
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468 _('hg rebase [-s REV | -b REV] [-d REV] [--collapse] [--keep] ' |
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469 '[--keepbranches] | [-c] | [-a]')), |
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470 } |