Mercurial > hg
annotate hgext/uncommit.py @ 34201:310c151a0705
posix: use slicing to grab a single byte out of a bytes in HFS+ normcase code
author | Augie Fackler <raf@durin42.com> |
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date | Fri, 15 Sep 2017 19:44:05 -0400 |
parents | da2f5f19312c |
children | f94442d46984 |
rev | line source |
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1 # uncommit - undo the actions of a commit |
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2 # |
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3 # Copyright 2011 Peter Arrenbrecht <peter.arrenbrecht@gmail.com> |
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4 # Logilab SA <contact@logilab.fr> |
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5 # Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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6 # Patrick Mezard <patrick@mezard.eu> |
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7 # Copyright 2016 Facebook, Inc. |
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8 # |
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9 # This software may be used and distributed according to the terms of the |
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10 # GNU General Public License version 2 or any later version. |
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11 |
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12 """uncommit part or all of a local changeset (EXPERIMENTAL) |
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13 |
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14 This command undoes the effect of a local commit, returning the affected |
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15 files to their uncommitted state. This means that files modified, added or |
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16 removed in the changeset will be left unchanged, and so will remain modified, |
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17 added and removed in the working directory. |
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18 """ |
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19 |
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20 from __future__ import absolute_import |
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21 |
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22 from mercurial.i18n import _ |
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23 |
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24 from mercurial import ( |
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25 commands, |
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26 context, |
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27 copies, |
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28 error, |
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29 node, |
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30 obsolete, |
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31 registrar, |
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32 scmutil, |
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33 ) |
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34 |
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35 cmdtable = {} |
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36 command = registrar.command(cmdtable) |
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37 |
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38 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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39 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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40 # be specifying the version(s) of Mercurial they are tested with, or |
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41 # leave the attribute unspecified. |
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42 testedwith = 'ships-with-hg-core' |
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43 |
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44 def _commitfiltered(repo, ctx, match, allowempty): |
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45 """Recommit ctx with changed files not in match. Return the new |
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46 node identifier, or None if nothing changed. |
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47 """ |
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48 base = ctx.p1() |
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49 # ctx |
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50 initialfiles = set(ctx.files()) |
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51 exclude = set(f for f in initialfiles if match(f)) |
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52 |
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53 # No files matched commit, so nothing excluded |
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54 if not exclude: |
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55 return None |
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56 |
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57 files = (initialfiles - exclude) |
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58 # return the p1 so that we don't create an obsmarker later |
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59 if not files and not allowempty: |
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60 return ctx.parents()[0].node() |
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61 |
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62 # Filter copies |
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63 copied = copies.pathcopies(base, ctx) |
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64 copied = dict((dst, src) for dst, src in copied.iteritems() |
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65 if dst in files) |
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66 def filectxfn(repo, memctx, path, contentctx=ctx, redirect=()): |
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67 if path not in contentctx: |
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68 return None |
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69 fctx = contentctx[path] |
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70 mctx = context.memfilectx(repo, fctx.path(), fctx.data(), |
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71 fctx.islink(), |
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72 fctx.isexec(), |
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73 copied=copied.get(path)) |
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74 return mctx |
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75 |
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76 new = context.memctx(repo, |
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77 parents=[base.node(), node.nullid], |
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78 text=ctx.description(), |
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79 files=files, |
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80 filectxfn=filectxfn, |
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81 user=ctx.user(), |
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82 date=ctx.date(), |
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83 extra=ctx.extra()) |
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84 # phase handling |
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85 commitphase = ctx.phase() |
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86 overrides = {('phases', 'new-commit'): commitphase} |
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87 with repo.ui.configoverride(overrides, 'uncommit'): |
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88 newid = repo.commitctx(new) |
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89 return newid |
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90 |
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91 def _uncommitdirstate(repo, oldctx, match): |
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92 """Fix the dirstate after switching the working directory from |
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93 oldctx to a copy of oldctx not containing changed files matched by |
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94 match. |
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95 """ |
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96 ctx = repo['.'] |
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97 ds = repo.dirstate |
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98 copies = dict(ds.copies()) |
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99 s = repo.status(oldctx.p1(), oldctx, match=match) |
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100 for f in s.modified: |
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101 if ds[f] == 'r': |
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102 # modified + removed -> removed |
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103 continue |
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104 ds.normallookup(f) |
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105 |
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106 for f in s.added: |
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107 if ds[f] == 'r': |
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108 # added + removed -> unknown |
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109 ds.drop(f) |
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110 elif ds[f] != 'a': |
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111 ds.add(f) |
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112 |
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113 for f in s.removed: |
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114 if ds[f] == 'a': |
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115 # removed + added -> normal |
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116 ds.normallookup(f) |
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117 elif ds[f] != 'r': |
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118 ds.remove(f) |
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119 |
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120 # Merge old parent and old working dir copies |
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121 oldcopies = {} |
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122 for f in (s.modified + s.added): |
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123 src = oldctx[f].renamed() |
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124 if src: |
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125 oldcopies[f] = src[0] |
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126 oldcopies.update(copies) |
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127 copies = dict((dst, oldcopies.get(src, src)) |
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128 for dst, src in oldcopies.iteritems()) |
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129 # Adjust the dirstate copies |
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130 for dst, src in copies.iteritems(): |
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131 if (src not in ctx or dst in ctx or ds[dst] != 'a'): |
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132 src = None |
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133 ds.copy(src, dst) |
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134 |
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135 @command('uncommit', |
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136 [('', 'empty', False, _('allow an empty commit after uncommiting')), |
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137 ] + commands.walkopts, |
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138 _('[OPTION]... [FILE]...')) |
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139 def uncommit(ui, repo, *pats, **opts): |
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140 """uncommit part or all of a local changeset |
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141 |
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142 This command undoes the effect of a local commit, returning the affected |
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143 files to their uncommitted state. This means that files modified or |
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144 deleted in the changeset will be left unchanged, and so will remain |
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145 modified in the working directory. |
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146 """ |
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147 |
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148 with repo.wlock(), repo.lock(): |
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149 wctx = repo[None] |
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150 |
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151 if wctx.parents()[0].node() == node.nullid: |
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152 raise error.Abort(_("cannot uncommit null changeset")) |
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153 if len(wctx.parents()) > 1: |
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154 raise error.Abort(_("cannot uncommit while merging")) |
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155 old = repo['.'] |
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156 if not old.mutable(): |
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157 raise error.Abort(_('cannot uncommit public changesets')) |
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158 if len(old.parents()) > 1: |
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159 raise error.Abort(_("cannot uncommit merge changeset")) |
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160 allowunstable = obsolete.isenabled(repo, obsolete.allowunstableopt) |
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161 if not allowunstable and old.children(): |
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162 raise error.Abort(_('cannot uncommit changeset with children')) |
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163 |
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164 with repo.transaction('uncommit'): |
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165 match = scmutil.match(old, pats, opts) |
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166 newid = _commitfiltered(repo, old, match, opts.get('empty')) |
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167 if newid is None: |
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168 ui.status(_("nothing to uncommit\n")) |
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169 return 1 |
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170 |
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171 mapping = {} |
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172 if newid != old.p1().node(): |
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173 # Move local changes on filtered changeset |
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174 mapping[old.node()] = (newid,) |
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175 else: |
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176 # Fully removed the old commit |
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177 mapping[old.node()] = () |
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178 |
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179 scmutil.cleanupnodes(repo, mapping, 'uncommit') |
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180 |
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181 with repo.dirstate.parentchange(): |
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182 repo.dirstate.setparents(newid, node.nullid) |
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183 _uncommitdirstate(repo, old, match) |