annotate hgext/share.py @ 32837:50586a0a946f

cmdutil: factor out helper to create changeset_templater with literal template changeset_templater has lots of arguments, but most callers only need to specify a literal template 'tmpl'. "hg debugtemplate" has no diff option, which means 'opts' were effectively {}, so dropped opts.
author Yuya Nishihara <yuya@tcha.org>
date Sat, 22 Apr 2017 18:42:03 +0900
parents 46ba2cdda476
children fac9941bd542
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # Copyright 2006, 2007 Matt Mackall <mpm@selenic.com>
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2 #
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3 # This software may be used and distributed according to the terms of the
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4 # GNU General Public License version 2 or any later version.
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5
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6 '''share a common history between several working directories
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7
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8 Automatic Pooled Storage for Clones
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9 -----------------------------------
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10
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11 When this extension is active, :hg:`clone` can be configured to
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12 automatically share/pool storage across multiple clones. This
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13 mode effectively converts :hg:`clone` to :hg:`clone` + :hg:`share`.
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14 The benefit of using this mode is the automatic management of
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15 store paths and intelligent pooling of related repositories.
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16
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17 The following ``share.`` config options influence this feature:
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18
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19 ``share.pool``
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20 Filesystem path where shared repository data will be stored. When
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21 defined, :hg:`clone` will automatically use shared repository
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22 storage instead of creating a store inside each clone.
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23
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24 ``share.poolnaming``
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25 How directory names in ``share.pool`` are constructed.
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26
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27 "identity" means the name is derived from the first changeset in the
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28 repository. In this mode, different remotes share storage if their
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29 root/initial changeset is identical. In this mode, the local shared
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30 repository is an aggregate of all encountered remote repositories.
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31
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32 "remote" means the name is derived from the source repository's
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33 path or URL. In this mode, storage is only shared if the path or URL
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34 requested in the :hg:`clone` command matches exactly to a repository
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35 that was cloned before.
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36
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37 The default naming mode is "identity."
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38 '''
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39
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40 from __future__ import absolute_import
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41
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42 import errno
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43 from mercurial.i18n import _
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44 from mercurial import (
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45 bookmarks,
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46 commands,
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47 error,
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48 extensions,
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49 hg,
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50 registrar,
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51 txnutil,
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52 util,
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53 )
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54
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55 repository = hg.repository
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56 parseurl = hg.parseurl
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57
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58 cmdtable = {}
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59 command = registrar.command(cmdtable)
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60 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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61 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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62 # be specifying the version(s) of Mercurial they are tested with, or
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63 # leave the attribute unspecified.
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64 testedwith = 'ships-with-hg-core'
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65
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66 @command('share',
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67 [('U', 'noupdate', None, _('do not create a working directory')),
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68 ('B', 'bookmarks', None, _('also share bookmarks')),
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69 ('', 'relative', None, _('point to source using a relative path '
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70 '(EXPERIMENTAL)')),
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71 ],
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72 _('[-U] [-B] SOURCE [DEST]'),
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73 norepo=True)
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74 def share(ui, source, dest=None, noupdate=False, bookmarks=False,
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75 relative=False):
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76 """create a new shared repository
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77
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78 Initialize a new repository and working directory that shares its
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79 history (and optionally bookmarks) with another repository.
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80
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81 .. note::
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82
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83 using rollback or extensions that destroy/modify history (mq,
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84 rebase, etc.) can cause considerable confusion with shared
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85 clones. In particular, if two shared clones are both updated to
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86 the same changeset, and one of them destroys that changeset
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87 with rollback, the other clone will suddenly stop working: all
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88 operations will fail with "abort: working directory has unknown
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89 parent". The only known workaround is to use debugsetparents on
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90 the broken clone to reset it to a changeset that still exists.
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91 """
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92
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93 return hg.share(ui, source, dest=dest, update=not noupdate,
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94 bookmarks=bookmarks, relative=relative)
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95
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96 @command('unshare', [], '')
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97 def unshare(ui, repo):
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98 """convert a shared repository to a normal one
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99
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100 Copy the store data to the repo and remove the sharedpath data.
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101 """
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102
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103 if not repo.shared():
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104 raise error.Abort(_("this is not a shared repo"))
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105
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106 destlock = lock = None
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107 lock = repo.lock()
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108 try:
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109 # we use locks here because if we race with commit, we
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110 # can end up with extra data in the cloned revlogs that's
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111 # not pointed to by changesets, thus causing verify to
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112 # fail
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113
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114 destlock = hg.copystore(ui, repo, repo.path)
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115
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116 sharefile = repo.vfs.join('sharedpath')
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117 util.rename(sharefile, sharefile + '.old')
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118
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119 repo.requirements.discard('shared')
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120 repo.requirements.discard('relshared')
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121 repo._writerequirements()
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122 finally:
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123 destlock and destlock.release()
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124 lock and lock.release()
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125
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126 # update store, spath, svfs and sjoin of repo
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127 repo.unfiltered().__init__(repo.baseui, repo.root)
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128
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129 # Wrap clone command to pass auto share options.
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130 def clone(orig, ui, source, *args, **opts):
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131 pool = ui.config('share', 'pool', None)
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132 if pool:
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133 pool = util.expandpath(pool)
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134
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135 opts['shareopts'] = dict(
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136 pool=pool,
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137 mode=ui.config('share', 'poolnaming', 'identity'),
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138 )
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139
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140 return orig(ui, source, *args, **opts)
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141
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142 def extsetup(ui):
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143 extensions.wrapfunction(bookmarks, '_getbkfile', getbkfile)
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144 extensions.wrapfunction(bookmarks.bmstore, 'recordchange', recordchange)
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145 extensions.wrapfunction(bookmarks.bmstore, '_writerepo', writerepo)
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146 extensions.wrapcommand(commands.table, 'clone', clone)
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147
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148 def _hassharedbookmarks(repo):
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149 """Returns whether this repo has shared bookmarks"""
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150 try:
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151 shared = repo.vfs.read('shared').splitlines()
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152 except IOError as inst:
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153 if inst.errno != errno.ENOENT:
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154 raise
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155 return False
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156 return hg.sharedbookmarks in shared
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157
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158 def _getsrcrepo(repo):
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159 """
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160 Returns the source repository object for a given shared repository.
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161 If repo is not a shared repository, return None.
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162 """
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163 if repo.sharedpath == repo.path:
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164 return None
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165
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166 if util.safehasattr(repo, 'srcrepo') and repo.srcrepo:
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167 return repo.srcrepo
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168
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169 # the sharedpath always ends in the .hg; we want the path to the repo
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170 source = repo.vfs.split(repo.sharedpath)[0]
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171 srcurl, branches = parseurl(source)
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172 srcrepo = repository(repo.ui, srcurl)
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173 repo.srcrepo = srcrepo
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174 return srcrepo
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175
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176 def getbkfile(orig, repo):
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177 if _hassharedbookmarks(repo):
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178 srcrepo = _getsrcrepo(repo)
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179 if srcrepo is not None:
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180 # just orig(srcrepo) doesn't work as expected, because
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181 # HG_PENDING refers repo.root.
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182 try:
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183 fp, pending = txnutil.trypending(repo.root, repo.vfs,
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184 'bookmarks')
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185 if pending:
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186 # only in this case, bookmark information in repo
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187 # is up-to-date.
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188 return fp
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189 fp.close()
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190 except IOError as inst:
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191 if inst.errno != errno.ENOENT:
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192 raise
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193
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194 # otherwise, we should read bookmarks from srcrepo,
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195 # because .hg/bookmarks in srcrepo might be already
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196 # changed via another sharing repo
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197 repo = srcrepo
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198
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199 # TODO: Pending changes in repo are still invisible in
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200 # srcrepo, because bookmarks.pending is written only into repo.
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201 # See also https://www.mercurial-scm.org/wiki/SharedRepository
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202 return orig(repo)
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203
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204 def recordchange(orig, self, tr):
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205 # Continue with write to local bookmarks file as usual
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206 orig(self, tr)
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207
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208 if _hassharedbookmarks(self._repo):
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209 srcrepo = _getsrcrepo(self._repo)
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210 if srcrepo is not None:
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211 category = 'share-bookmarks'
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212 tr.addpostclose(category, lambda tr: self._writerepo(srcrepo))
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213
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214 def writerepo(orig, self, repo):
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215 # First write local bookmarks file in case we ever unshare
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216 orig(self, repo)
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217
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218 if _hassharedbookmarks(self._repo):
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219 srcrepo = _getsrcrepo(self._repo)
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220 if srcrepo is not None:
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diff changeset
221 orig(self, srcrepo)