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@@ -1,401 +1,401 b'' | |||
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1 | 1 | # rebase.py - rebasing feature for mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2008 Stefano Tortarolo <stefano.tortarolo at gmail dot com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms |
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6 | 6 | # of the GNU General Public License, incorporated herein by reference. |
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7 | 7 | |
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8 | 8 | ''' Rebasing feature |
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9 | 9 | |
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10 | 10 | This extension lets you rebase changesets in an existing Mercurial repository. |
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11 | 11 | |
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12 | 12 | For more information: |
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13 | 13 | http://www.selenic.com/mercurial/wiki/index.cgi/RebaseProject |
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14 | 14 | ''' |
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15 | 15 | |
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16 | 16 | from mercurial import util, repair, merge, cmdutil, dispatch, commands |
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17 | 17 | from mercurial.commands import templateopts |
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18 | 18 | from mercurial.node import nullrev |
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19 | 19 | from mercurial.i18n import _ |
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20 | 20 | import os, errno |
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21 | 21 | |
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22 | 22 | def rebase(ui, repo, **opts): |
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23 | 23 | """move changeset (and descendants) to a different branch |
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24 | 24 | |
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25 | 25 | Rebase uses repeated merging to graft changesets from one part of history |
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26 | 26 | onto another. This can be useful for linearizing local changes relative to |
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27 | 27 | a master development tree. |
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28 | 28 | |
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29 | 29 | If a rebase is interrupted to manually resolve a merge, it can be continued |
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30 | 30 | with --continue or aborted with --abort. |
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31 | 31 | """ |
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32 | 32 | originalwd = target = source = None |
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33 | 33 | external = nullrev |
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34 | 34 | state = skipped = {} |
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35 | 35 | |
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36 | 36 | lock = wlock = None |
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37 | 37 | try: |
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38 | 38 | lock = repo.lock() |
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39 | 39 | wlock = repo.wlock() |
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40 | 40 | |
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41 | 41 | # Validate input and define rebasing points |
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42 | 42 | destf = opts.get('dest', None) |
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43 | 43 | srcf = opts.get('source', None) |
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44 | 44 | basef = opts.get('base', None) |
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45 | 45 | contf = opts.get('continue') |
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46 | 46 | abortf = opts.get('abort') |
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47 | 47 | collapsef = opts.get('collapse', False) |
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48 | 48 | if contf or abortf: |
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49 | 49 | if contf and abortf: |
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50 | 50 | raise dispatch.ParseError('rebase', |
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51 | 51 | _('cannot use both abort and continue')) |
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52 | 52 | if collapsef: |
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53 | 53 | raise dispatch.ParseError('rebase', |
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54 | 54 | _('cannot use collapse with continue or abort')) |
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55 | 55 | |
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56 | 56 | if (srcf or basef or destf): |
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57 | 57 | raise dispatch.ParseError('rebase', |
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58 | 58 | _('abort and continue do not allow specifying revisions')) |
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59 | 59 | |
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60 | 60 | originalwd, target, state, collapsef, external = restorestatus(repo) |
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61 | 61 | if abortf: |
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62 | 62 | abort(repo, originalwd, target, state) |
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63 | 63 | return |
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64 | 64 | else: |
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65 | 65 | if srcf and basef: |
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66 | 66 | raise dispatch.ParseError('rebase', _('cannot specify both a ' |
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67 | 67 | 'revision and a base')) |
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68 | 68 | cmdutil.bail_if_changed(repo) |
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69 | 69 | result = buildstate(repo, destf, srcf, basef, collapsef) |
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70 | 70 | if result: |
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71 | 71 | originalwd, target, state, external = result |
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72 | 72 | else: # Empty state built, nothing to rebase |
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73 | 73 | repo.ui.status(_('nothing to rebase\n')) |
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74 | 74 | return |
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75 | 75 | |
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76 | 76 | # Rebase |
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77 | 77 | targetancestors = list(repo.changelog.ancestors(target)) |
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78 | 78 | targetancestors.append(target) |
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79 | 79 | |
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80 | 80 | for rev in util.sort(state): |
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81 | 81 | if state[rev] == -1: |
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82 | 82 | storestatus(repo, originalwd, target, state, collapsef, |
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83 | 83 | external) |
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84 | 84 | rebasenode(repo, rev, target, state, skipped, targetancestors, |
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85 | 85 | collapsef) |
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86 | 86 | ui.note(_('rebase merging completed\n')) |
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87 | 87 | |
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88 | 88 | if collapsef: |
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89 | 89 | p1, p2 = defineparents(repo, min(state), target, |
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90 | 90 | state, targetancestors) |
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91 | 91 | concludenode(repo, rev, p1, external, state, collapsef, |
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92 | 92 | last=True, skipped=skipped) |
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93 | 93 | |
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94 | 94 | if 'qtip' in repo.tags(): |
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95 | 95 | updatemq(repo, state, skipped, **opts) |
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96 | 96 | |
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97 | 97 | if not opts.get('keep'): |
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98 | 98 | # Remove no more useful revisions |
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99 | 99 | if (util.set(repo.changelog.descendants(min(state))) |
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100 | 100 | - util.set(state.keys())): |
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101 | 101 | ui.warn(_("warning: new changesets detected on source branch, " |
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102 | 102 | "not stripping\n")) |
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103 | 103 | else: |
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104 | 104 | repair.strip(repo.ui, repo, repo[min(state)].node(), "strip") |
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105 | 105 | |
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106 | 106 | clearstatus(repo) |
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107 | 107 | ui.status(_("rebase completed\n")) |
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108 | 108 | if skipped: |
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109 | 109 | ui.note(_("%d revisions have been skipped\n") % len(skipped)) |
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110 | 110 | finally: |
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111 | 111 | del lock, wlock |
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112 | 112 | |
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113 | 113 | def concludenode(repo, rev, p1, p2, state, collapse, last=False, skipped={}): |
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114 | 114 | """Skip commit if collapsing has been required and rev is not the last |
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115 | 115 | revision, commit otherwise |
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116 | 116 | """ |
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117 | 117 | repo.dirstate.setparents(repo[p1].node(), repo[p2].node()) |
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118 | 118 | |
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119 | 119 | if collapse and not last: |
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120 | 120 | return None |
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121 | 121 | |
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122 | 122 | # Commit, record the old nodeid |
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123 | 123 | m, a, r = repo.status()[:3] |
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124 | 124 | newrev = nullrev |
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125 | 125 | try: |
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126 | 126 | if last: |
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127 | 127 | commitmsg = 'Collapsed revision' |
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128 | 128 | for rebased in state: |
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129 | 129 | if rebased not in skipped: |
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130 | 130 | commitmsg += '\n* %s' % repo[rebased].description() |
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131 | 131 | commitmsg = repo.ui.edit(commitmsg, repo.ui.username()) |
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132 | 132 | else: |
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133 | 133 | commitmsg = repo[rev].description() |
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134 | 134 | # Commit might fail if unresolved files exist |
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135 | 135 | newrev = repo.commit(m+a+r, |
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136 | 136 | text=commitmsg, |
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137 | 137 | user=repo[rev].user(), |
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138 | 138 | date=repo[rev].date(), |
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139 | 139 | extra={'rebase_source': repo[rev].hex()}) |
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140 | 140 | return newrev |
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141 | 141 | except util.Abort: |
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142 | 142 | # Invalidate the previous setparents |
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143 | 143 | repo.dirstate.invalidate() |
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144 | 144 | raise |
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145 | 145 | |
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146 | 146 | def rebasenode(repo, rev, target, state, skipped, targetancestors, collapse): |
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147 | 147 | 'Rebase a single revision' |
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148 | 148 | repo.ui.debug(_("rebasing %d:%s\n") % (rev, repo[rev].node())) |
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149 | 149 | |
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150 | 150 | p1, p2 = defineparents(repo, rev, target, state, targetancestors) |
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151 | 151 | |
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152 | 152 | # Merge phase |
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153 | 153 | if len(repo.parents()) != 2: |
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154 | 154 | # Update to target and merge it with local |
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155 | 155 | merge.update(repo, p1, False, True, False) |
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156 | 156 | repo.dirstate.write() |
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157 | 157 | stats = merge.update(repo, rev, True, False, False) |
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158 | 158 | |
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159 | 159 | if stats[3] > 0: |
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160 | 160 | raise util.Abort(_('fix unresolved conflicts with hg resolve then ' |
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161 | 161 | 'run hg rebase --continue')) |
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162 | 162 | else: # we have an interrupted rebase |
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163 | 163 | repo.ui.debug(_('resuming interrupted rebase\n')) |
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164 | 164 | |
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165 | 165 | |
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166 | 166 | newrev = concludenode(repo, rev, p1, p2, state, collapse) |
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167 | 167 | |
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168 | 168 | # Update the state |
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169 | 169 | if newrev is not None: |
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170 | 170 | state[rev] = repo[newrev].rev() |
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171 | 171 | else: |
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172 | 172 | if not collapse: |
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173 | repo.ui.note('no changes, revision %d skipped\n' % rev) | |
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174 | repo.ui.debug('next revision set to %s\n' % p1) | |
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173 | repo.ui.note(_('no changes, revision %d skipped\n') % rev) | |
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174 | repo.ui.debug(_('next revision set to %s\n') % p1) | |
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175 | 175 | skipped[rev] = True |
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176 | 176 | state[rev] = p1 |
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177 | 177 | |
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178 | 178 | def defineparents(repo, rev, target, state, targetancestors): |
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179 | 179 | 'Return the new parent relationship of the revision that will be rebased' |
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180 | 180 | parents = repo[rev].parents() |
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181 | 181 | p1 = p2 = nullrev |
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182 | 182 | |
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183 | 183 | P1n = parents[0].rev() |
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184 | 184 | if P1n in targetancestors: |
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185 | 185 | p1 = target |
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186 | 186 | elif P1n in state: |
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187 | 187 | p1 = state[P1n] |
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188 | 188 | else: # P1n external |
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189 | 189 | p1 = target |
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190 | 190 | p2 = P1n |
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191 | 191 | |
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192 | 192 | if len(parents) == 2 and parents[1].rev() not in targetancestors: |
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193 | 193 | P2n = parents[1].rev() |
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194 | 194 | # interesting second parent |
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195 | 195 | if P2n in state: |
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196 | 196 | if p1 == target: # P1n in targetancestors or external |
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197 | 197 | p1 = state[P2n] |
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198 | 198 | else: |
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199 | 199 | p2 = state[P2n] |
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200 | 200 | else: # P2n external |
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201 | 201 | if p2 != nullrev: # P1n external too => rev is a merged revision |
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202 | 202 | raise util.Abort(_('cannot use revision %d as base, result ' |
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203 | 203 | 'would have 3 parents') % rev) |
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204 | 204 | p2 = P2n |
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205 | 205 | return p1, p2 |
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206 | 206 | |
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207 | 207 | def updatemq(repo, state, skipped, **opts): |
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208 | 208 | 'Update rebased mq patches - finalize and then import them' |
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209 | 209 | mqrebase = {} |
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210 | 210 | for p in repo.mq.applied: |
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211 | 211 | if repo[p.rev].rev() in state: |
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212 | repo.ui.debug('revision %d is an mq patch (%s), finalize it.\n' % | |
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212 | repo.ui.debug(_('revision %d is an mq patch (%s), finalize it.\n') % | |
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213 | 213 | (repo[p.rev].rev(), p.name)) |
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214 | 214 | mqrebase[repo[p.rev].rev()] = p.name |
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215 | 215 | |
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216 | 216 | if mqrebase: |
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217 | 217 | repo.mq.finish(repo, mqrebase.keys()) |
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218 | 218 | |
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219 | 219 | # We must start import from the newest revision |
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220 | 220 | mq = mqrebase.keys() |
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221 | 221 | mq.sort() |
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222 | 222 | mq.reverse() |
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223 | 223 | for rev in mq: |
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224 | 224 | if rev not in skipped: |
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225 |
repo.ui.debug('import mq patch %d (%s)\n' |
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226 |
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225 | repo.ui.debug(_('import mq patch %d (%s)\n') | |
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226 | % (state[rev], mqrebase[rev])) | |
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227 | 227 | repo.mq.qimport(repo, (), patchname=mqrebase[rev], |
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228 | 228 | git=opts.get('git', False),rev=[str(state[rev])]) |
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229 | 229 | repo.mq.save_dirty() |
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230 | 230 | |
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231 | 231 | def storestatus(repo, originalwd, target, state, collapse, external): |
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232 | 232 | 'Store the current status to allow recovery' |
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233 | 233 | f = repo.opener("rebasestate", "w") |
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234 | 234 | f.write(repo[originalwd].hex() + '\n') |
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235 | 235 | f.write(repo[target].hex() + '\n') |
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236 | 236 | f.write(repo[external].hex() + '\n') |
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237 | 237 | f.write('%d\n' % int(collapse)) |
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238 | 238 | for d, v in state.items(): |
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239 | 239 | oldrev = repo[d].hex() |
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240 | 240 | newrev = repo[v].hex() |
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241 | 241 | f.write("%s:%s\n" % (oldrev, newrev)) |
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242 | 242 | f.close() |
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243 | 243 | repo.ui.debug(_('rebase status stored\n')) |
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244 | 244 | |
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245 | 245 | def clearstatus(repo): |
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246 | 246 | 'Remove the status files' |
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247 | 247 | if os.path.exists(repo.join("rebasestate")): |
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248 | 248 | util.unlink(repo.join("rebasestate")) |
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249 | 249 | |
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250 | 250 | def restorestatus(repo): |
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251 | 251 | 'Restore a previously stored status' |
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252 | 252 | try: |
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253 | 253 | target = None |
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254 | 254 | collapse = False |
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255 | 255 | external = nullrev |
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256 | 256 | state = {} |
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257 | 257 | f = repo.opener("rebasestate") |
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258 | 258 | for i, l in enumerate(f.read().splitlines()): |
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259 | 259 | if i == 0: |
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260 | 260 | originalwd = repo[l].rev() |
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261 | 261 | elif i == 1: |
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262 | 262 | target = repo[l].rev() |
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263 | 263 | elif i == 2: |
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264 | 264 | external = repo[l].rev() |
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265 | 265 | elif i == 3: |
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266 | 266 | collapse = bool(int(l)) |
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267 | 267 | else: |
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268 | 268 | oldrev, newrev = l.split(':') |
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269 | 269 | state[repo[oldrev].rev()] = repo[newrev].rev() |
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270 | 270 | repo.ui.debug(_('rebase status resumed\n')) |
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271 | 271 | return originalwd, target, state, collapse, external |
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272 | 272 | except IOError, err: |
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273 | 273 | if err.errno != errno.ENOENT: |
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274 | 274 | raise |
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275 | 275 | raise util.Abort(_('no rebase in progress')) |
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276 | 276 | |
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277 | 277 | def abort(repo, originalwd, target, state): |
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278 | 278 | 'Restore the repository to its original state' |
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279 | 279 | if util.set(repo.changelog.descendants(target)) - util.set(state.values()): |
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280 | 280 | repo.ui.warn(_("warning: new changesets detected on target branch, " |
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281 | 281 | "not stripping\n")) |
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282 | 282 | else: |
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283 | 283 | # Strip from the first rebased revision |
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284 | 284 | merge.update(repo, repo[originalwd].rev(), False, True, False) |
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285 | 285 | rebased = filter(lambda x: x > -1, state.values()) |
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286 | 286 | if rebased: |
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287 | 287 | strippoint = min(rebased) |
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288 | 288 | repair.strip(repo.ui, repo, repo[strippoint].node(), "strip") |
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289 | 289 | clearstatus(repo) |
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290 | 290 | repo.ui.status(_('rebase aborted\n')) |
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291 | 291 | |
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292 | 292 | def buildstate(repo, dest, src, base, collapse): |
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293 | 293 | 'Define which revisions are going to be rebased and where' |
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294 | 294 | state = {} |
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295 | 295 | targetancestors = util.set() |
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296 | 296 | |
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297 | 297 | if not dest: |
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298 | 298 | # Destination defaults to the latest revision in the current branch |
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299 | 299 | branch = repo[None].branch() |
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300 | 300 | dest = repo[branch].rev() |
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301 | 301 | else: |
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302 | 302 | if 'qtip' in repo.tags() and (repo[dest].hex() in |
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303 | 303 | [s.rev for s in repo.mq.applied]): |
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304 | 304 | raise util.Abort(_('cannot rebase onto an applied mq patch')) |
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305 | 305 | dest = repo[dest].rev() |
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306 | 306 | |
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307 | 307 | if src: |
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308 | 308 | commonbase = repo[src].ancestor(repo[dest]) |
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309 | 309 | if commonbase == repo[src]: |
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310 | 310 | raise util.Abort(_('cannot rebase an ancestor')) |
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311 | 311 | if commonbase == repo[dest]: |
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312 | 312 | raise util.Abort(_('cannot rebase a descendant')) |
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313 | 313 | source = repo[src].rev() |
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314 | 314 | else: |
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315 | 315 | if base: |
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316 | 316 | cwd = repo[base].rev() |
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317 | 317 | else: |
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318 | 318 | cwd = repo['.'].rev() |
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319 | 319 | |
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320 | 320 | if cwd == dest: |
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321 | 321 | repo.ui.debug(_('already working on current\n')) |
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322 | 322 | return None |
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323 | 323 | |
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324 | 324 | targetancestors = util.set(repo.changelog.ancestors(dest)) |
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325 | 325 | if cwd in targetancestors: |
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326 | 326 | repo.ui.debug(_('already working on the current branch\n')) |
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327 | 327 | return None |
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328 | 328 | |
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329 | 329 | cwdancestors = util.set(repo.changelog.ancestors(cwd)) |
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330 | 330 | cwdancestors.add(cwd) |
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331 | 331 | rebasingbranch = cwdancestors - targetancestors |
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332 | 332 | source = min(rebasingbranch) |
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333 | 333 | |
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334 | 334 | repo.ui.debug(_('rebase onto %d starting from %d\n') % (dest, source)) |
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335 | 335 | state = dict.fromkeys(repo.changelog.descendants(source), nullrev) |
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336 | 336 | external = nullrev |
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337 | 337 | if collapse: |
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338 | 338 | if not targetancestors: |
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339 | 339 | targetancestors = util.set(repo.changelog.ancestors(dest)) |
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340 | 340 | for rev in state: |
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341 | 341 | # Check externals and fail if there are more than one |
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342 | 342 | for p in repo[rev].parents(): |
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343 | 343 | if (p.rev() not in state and p.rev() != source |
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344 | 344 | and p.rev() not in targetancestors): |
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345 | 345 | if external != nullrev: |
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346 | 346 | raise util.Abort(_('unable to collapse, there is more ' |
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347 | 347 | 'than one external parent')) |
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348 | 348 | external = p.rev() |
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349 | 349 | |
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350 | 350 | state[source] = nullrev |
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351 | 351 | return repo['.'].rev(), repo[dest].rev(), state, external |
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352 | 352 | |
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353 | 353 | def pulldelegate(pullfunction, repo, *args, **opts): |
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354 | 354 | 'Call rebase after pull if the latter has been invoked with --rebase' |
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355 | 355 | if opts.get('rebase'): |
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356 | 356 | if opts.get('update'): |
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357 | 357 | raise util.Abort(_('--update and --rebase are not compatible')) |
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358 | 358 | |
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359 | 359 | cmdutil.bail_if_changed(repo) |
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360 | 360 | revsprepull = len(repo) |
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361 | 361 | pullfunction(repo.ui, repo, *args, **opts) |
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362 | 362 | revspostpull = len(repo) |
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363 | 363 | if revspostpull > revsprepull: |
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364 | 364 | rebase(repo.ui, repo, **opts) |
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365 | 365 | else: |
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366 | 366 | pullfunction(repo.ui, repo, *args, **opts) |
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367 | 367 | |
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368 | 368 | def uisetup(ui): |
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369 | 369 | 'Replace pull with a decorator to provide --rebase option' |
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370 | 370 | # cribbed from color.py |
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371 | 371 | aliases, entry = cmdutil.findcmd(ui, 'pull', commands.table) |
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372 | 372 | for candidatekey, candidateentry in commands.table.iteritems(): |
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373 | 373 | if candidateentry is entry: |
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374 | 374 | cmdkey, cmdentry = candidatekey, entry |
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375 | 375 | break |
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376 | 376 | |
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377 | 377 | decorator = lambda ui, repo, *args, **opts: \ |
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378 | 378 | pulldelegate(cmdentry[0], repo, *args, **opts) |
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379 | 379 | # make sure 'hg help cmd' still works |
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380 | 380 | decorator.__doc__ = cmdentry[0].__doc__ |
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381 | 381 | decoratorentry = (decorator,) + cmdentry[1:] |
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382 | 382 | rebaseopt = ('', 'rebase', None, |
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383 | 383 | _("rebase working directory to branch head")) |
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384 | 384 | decoratorentry[1].append(rebaseopt) |
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385 | 385 | commands.table[cmdkey] = decoratorentry |
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386 | 386 | |
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387 | 387 | cmdtable = { |
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388 | 388 | "rebase": |
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389 | 389 | (rebase, |
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390 | 390 | [ |
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391 | 391 | ('', 'keep', False, _('keep original revisions')), |
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392 | 392 | ('s', 'source', '', _('rebase from a given revision')), |
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393 | 393 | ('b', 'base', '', _('rebase from the base of a given revision')), |
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394 | 394 | ('d', 'dest', '', _('rebase onto a given revision')), |
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395 | 395 | ('', 'collapse', False, _('collapse the rebased revisions')), |
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396 | 396 | ('c', 'continue', False, _('continue an interrupted rebase')), |
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397 | 397 | ('a', 'abort', False, _('abort an interrupted rebase')),] + |
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398 | 398 | templateopts, |
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399 | 399 | _('hg rebase [-s rev | -b rev] [-d rev] [--collapse] | [-c] | [-a] | ' |
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400 | 400 | '[--keep]')), |
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401 | 401 | } |
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