Mercurial > hg
annotate hgext/fetch.py @ 47280:1766130fe9ba
dirstate-v2: Change the on-disk format when the requirement is enabled
For now, the format is the same except with an additional marker at the start.
This marker is redundant: for existing repositories it is `.hg/requires` that
determines which format to use. For new repositories, it is the new
`format.exp-dirstate-v2` config. There is no upgrade or downgrade so far.
Most of the changes are about plumbing a boolean through layers of APIs to
indicate which format should be used.
Differential Revision: https://phab.mercurial-scm.org/D10719
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Wed, 19 May 2021 13:15:00 +0200 |
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1 # fetch.py - pull and merge remote changes |
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2 # |
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3 # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.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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7 |
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8 '''pull, update and merge in one command (DEPRECATED)''' |
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9 |
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10 from __future__ import absolute_import |
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11 |
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13 from mercurial.node import short |
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14 from mercurial import ( |
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15 cmdutil, |
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16 error, |
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17 exchange, |
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18 hg, |
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19 lock, |
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20 pycompat, |
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21 registrar, |
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22 ) |
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23 from mercurial.utils import ( |
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24 dateutil, |
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25 urlutil, |
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26 ) |
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27 |
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28 release = lock.release |
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29 cmdtable = {} |
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30 command = registrar.command(cmdtable) |
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31 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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32 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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33 # be specifying the version(s) of Mercurial they are tested with, or |
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34 # leave the attribute unspecified. |
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35 testedwith = b'ships-with-hg-core' |
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36 |
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37 |
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38 @command( |
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39 b'fetch', |
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40 [ |
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41 ( |
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42 b'r', |
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43 b'rev', |
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44 [], |
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45 _(b'a specific revision you would like to pull'), |
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46 _(b'REV'), |
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47 ), |
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48 (b'', b'edit', None, _(b'invoke editor on commit messages')), |
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49 (b'', b'force-editor', None, _(b'edit commit message (DEPRECATED)')), |
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50 (b'', b'switch-parent', None, _(b'switch parents when merging')), |
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51 ] |
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52 + cmdutil.commitopts |
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53 + cmdutil.commitopts2 |
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54 + cmdutil.remoteopts, |
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55 _(b'hg fetch [SOURCE]'), |
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56 helpcategory=command.CATEGORY_REMOTE_REPO_MANAGEMENT, |
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57 ) |
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58 def fetch(ui, repo, source=b'default', **opts): |
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59 """pull changes from a remote repository, merge new changes if needed. |
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60 |
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61 This finds all changes from the repository at the specified path |
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62 or URL and adds them to the local repository. |
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63 |
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64 If the pulled changes add a new branch head, the head is |
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65 automatically merged, and the result of the merge is committed. |
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66 Otherwise, the working directory is updated to include the new |
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67 changes. |
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68 |
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69 When a merge is needed, the working directory is first updated to |
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70 the newly pulled changes. Local changes are then merged into the |
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71 pulled changes. To switch the merge order, use --switch-parent. |
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72 |
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73 See :hg:`help dates` for a list of formats valid for -d/--date. |
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74 |
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75 Returns 0 on success. |
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76 """ |
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77 |
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78 opts = pycompat.byteskwargs(opts) |
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79 date = opts.get(b'date') |
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80 if date: |
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81 opts[b'date'] = dateutil.parsedate(date) |
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82 |
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83 parent = repo.dirstate.p1() |
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84 branch = repo.dirstate.branch() |
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85 try: |
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86 branchnode = repo.branchtip(branch) |
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87 except error.RepoLookupError: |
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88 branchnode = None |
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89 if parent != branchnode: |
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90 raise error.Abort( |
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91 _(b'working directory not at branch tip'), |
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92 hint=_(b"use 'hg update' to check out branch tip"), |
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93 ) |
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94 |
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95 wlock = lock = None |
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96 try: |
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97 wlock = repo.wlock() |
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98 lock = repo.lock() |
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99 |
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100 cmdutil.bailifchanged(repo) |
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101 |
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102 bheads = repo.branchheads(branch) |
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103 bheads = [head for head in bheads if len(repo[head].children()) == 0] |
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104 if len(bheads) > 1: |
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105 raise error.Abort( |
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106 _( |
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107 b'multiple heads in this branch ' |
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108 b'(use "hg heads ." and "hg merge" to merge)' |
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109 ) |
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110 ) |
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111 |
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112 path = urlutil.get_unique_pull_path(b'fetch', repo, ui, source)[0] |
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113 other = hg.peer(repo, opts, path) |
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114 ui.status(_(b'pulling from %s\n') % urlutil.hidepassword(path)) |
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115 revs = None |
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116 if opts[b'rev']: |
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117 try: |
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118 revs = [other.lookup(rev) for rev in opts[b'rev']] |
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119 except error.CapabilityError: |
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120 err = _( |
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121 b"other repository doesn't support revision lookup, " |
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122 b"so a rev cannot be specified." |
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123 ) |
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124 raise error.Abort(err) |
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125 |
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126 # Are there any changes at all? |
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127 modheads = exchange.pull(repo, other, heads=revs).cgresult |
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128 if modheads == 0: |
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129 return 0 |
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130 |
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131 # Is this a simple fast-forward along the current branch? |
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132 newheads = repo.branchheads(branch) |
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133 newchildren = repo.changelog.nodesbetween([parent], newheads)[2] |
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134 if len(newheads) == 1 and len(newchildren): |
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135 if newchildren[0] != parent: |
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136 return hg.update(repo, newchildren[0]) |
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137 else: |
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138 return 0 |
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139 |
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140 # Are there more than one additional branch heads? |
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141 newchildren = [n for n in newchildren if n != parent] |
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142 newparent = parent |
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143 if newchildren: |
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144 newparent = newchildren[0] |
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145 hg.clean(repo, newparent) |
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146 newheads = [n for n in newheads if n != newparent] |
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147 if len(newheads) > 1: |
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148 ui.status( |
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149 _( |
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150 b'not merging with %d other new branch heads ' |
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151 b'(use "hg heads ." and "hg merge" to merge them)\n' |
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152 ) |
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153 % (len(newheads) - 1) |
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154 ) |
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155 return 1 |
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156 |
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157 if not newheads: |
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158 return 0 |
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159 |
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160 # Otherwise, let's merge. |
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161 err = False |
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162 if newheads: |
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163 # By default, we consider the repository we're pulling |
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164 # *from* as authoritative, so we merge our changes into |
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165 # theirs. |
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166 if opts[b'switch_parent']: |
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167 firstparent, secondparent = newparent, newheads[0] |
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168 else: |
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169 firstparent, secondparent = newheads[0], newparent |
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170 ui.status( |
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171 _(b'updating to %d:%s\n') |
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172 % (repo.changelog.rev(firstparent), short(firstparent)) |
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173 ) |
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174 hg.clean(repo, firstparent) |
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175 p2ctx = repo[secondparent] |
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176 ui.status( |
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177 _(b'merging with %d:%s\n') % (p2ctx.rev(), short(secondparent)) |
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178 ) |
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179 err = hg.merge(p2ctx, remind=False) |
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180 |
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181 if not err: |
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182 # we don't translate commit messages |
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183 message = cmdutil.logmessage(ui, opts) or ( |
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184 b'Automated merge with %s' % urlutil.removeauth(other.url()) |
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185 ) |
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186 editopt = opts.get(b'edit') or opts.get(b'force_editor') |
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187 editor = cmdutil.getcommiteditor(edit=editopt, editform=b'fetch') |
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188 n = repo.commit( |
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189 message, opts[b'user'], opts[b'date'], editor=editor |
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190 ) |
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191 ui.status( |
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192 _(b'new changeset %d:%s merges remote changes with local\n') |
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193 % (repo.changelog.rev(n), short(n)) |
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194 ) |
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195 |
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196 return err |
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197 |
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198 finally: |
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199 release(lock, wlock) |