Mercurial > hg
annotate hgext/share.py @ 33334:20f533a92eda
amend: use scmutil.cleanupnodes (BC)
This is marked as BC because the strip backup file name has changed.
author | Jun Wu <quark@fb.com> |
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date | Mon, 26 Jun 2017 15:28:28 -0700 |
parents | 24c0a9a7fa86 |
children | 3325c7dcabaa |
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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 |
10263 | 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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82 |
12389 | 83 using rollback or extensions that destroy/modify history (mq, |
84 rebase, etc.) can cause considerable confusion with shared | |
85 clones. In particular, if two shared clones are both updated to | |
86 the same changeset, and one of them destroys that changeset | |
87 with rollback, the other clone will suddenly stop working: all | |
88 operations will fail with "abort: working directory has unknown | |
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[r'shareopts'] = { |
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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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221 orig(self, srcrepo) |