Mercurial > hg
annotate hgext/share.py @ 27586:42910f9fffeb
revset: use delayregistrar to register predicate in extension easily
Previous patch introduced 'revset.predicate' decorator to register
revset predicate function easily.
But it shouldn't be used in extension directly, because it registers
specified function immediately. Registration itself can't be restored,
even if extension loading fails after that.
Therefore, registration should be delayed until 'uisetup()' or so.
This patch uses 'extpredicate' decorator derived from 'delayregistrar'
to register predicate in extension easily.
This patch also tests whether 'registrar.delayregistrar' avoids
function registration if 'setup()' isn't invoked on it, because
'extpredicate' is the first user of it.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Tue, 29 Dec 2015 23:58:30 +0900 |
parents | 98e59d9e0d77 |
children | f21e0d91d386 |
rev | line source |
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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 mercurial.i18n import _ |
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41 from mercurial import cmdutil, commands, hg, util, extensions, bookmarks, error |
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42 from mercurial.hg import repository, parseurl |
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43 import errno |
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44 |
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45 cmdtable = {} |
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46 command = cmdutil.command(cmdtable) |
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47 # Note for extension authors: ONLY specify testedwith = 'internal' for |
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48 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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49 # be specifying the version(s) of Mercurial they are tested with, or |
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50 # leave the attribute unspecified. |
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51 testedwith = 'internal' |
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52 |
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53 @command('share', |
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54 [('U', 'noupdate', None, _('do not create a working directory')), |
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55 ('B', 'bookmarks', None, _('also share bookmarks'))], |
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56 _('[-U] [-B] SOURCE [DEST]'), |
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57 norepo=True) |
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58 def share(ui, source, dest=None, noupdate=False, bookmarks=False): |
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59 """create a new shared repository |
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60 |
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61 Initialize a new repository and working directory that shares its |
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62 history (and optionally bookmarks) with another repository. |
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63 |
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65 |
12389 | 66 using rollback or extensions that destroy/modify history (mq, |
67 rebase, etc.) can cause considerable confusion with shared | |
68 clones. In particular, if two shared clones are both updated to | |
69 the same changeset, and one of them destroys that changeset | |
70 with rollback, the other clone will suddenly stop working: all | |
71 operations will fail with "abort: working directory has unknown | |
72 parent". The only known workaround is to use debugsetparents on | |
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73 the broken clone to reset it to a changeset that still exists. |
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74 """ |
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75 |
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76 return hg.share(ui, source, dest=dest, update=not noupdate, |
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77 bookmarks=bookmarks) |
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78 |
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79 @command('unshare', [], '') |
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80 def unshare(ui, repo): |
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81 """convert a shared repository to a normal one |
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82 |
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83 Copy the store data to the repo and remove the sharedpath data. |
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84 """ |
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85 |
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86 if not repo.shared(): |
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87 raise error.Abort(_("this is not a shared repo")) |
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88 |
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89 destlock = lock = None |
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90 lock = repo.lock() |
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91 try: |
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92 # we use locks here because if we race with commit, we |
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93 # can end up with extra data in the cloned revlogs that's |
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94 # not pointed to by changesets, thus causing verify to |
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95 # fail |
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96 |
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97 destlock = hg.copystore(ui, repo, repo.path) |
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98 |
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99 sharefile = repo.join('sharedpath') |
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100 util.rename(sharefile, sharefile + '.old') |
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101 |
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102 repo.requirements.discard('sharedpath') |
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103 repo._writerequirements() |
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104 finally: |
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105 destlock and destlock.release() |
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106 lock and lock.release() |
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107 |
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108 # update store, spath, svfs and sjoin of repo |
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109 repo.unfiltered().__init__(repo.baseui, repo.root) |
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110 |
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111 # Wrap clone command to pass auto share options. |
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112 def clone(orig, ui, source, *args, **opts): |
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113 pool = ui.config('share', 'pool', None) |
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114 if pool: |
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115 pool = util.expandpath(pool) |
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116 |
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117 opts['shareopts'] = dict( |
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118 pool=pool, |
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119 mode=ui.config('share', 'poolnaming', 'identity'), |
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120 ) |
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121 |
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122 return orig(ui, source, *args, **opts) |
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123 |
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124 def extsetup(ui): |
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125 extensions.wrapfunction(bookmarks, '_getbkfile', getbkfile) |
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126 extensions.wrapfunction(bookmarks.bmstore, 'recordchange', recordchange) |
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127 extensions.wrapfunction(bookmarks.bmstore, '_writerepo', writerepo) |
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128 extensions.wrapcommand(commands.table, 'clone', clone) |
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129 |
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130 def _hassharedbookmarks(repo): |
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131 """Returns whether this repo has shared bookmarks""" |
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132 try: |
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133 shared = repo.vfs.read('shared').splitlines() |
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134 except IOError as inst: |
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135 if inst.errno != errno.ENOENT: |
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136 raise |
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137 return False |
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138 return 'bookmarks' in shared |
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139 |
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140 def _getsrcrepo(repo): |
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141 """ |
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142 Returns the source repository object for a given shared repository. |
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143 If repo is not a shared repository, return None. |
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144 """ |
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145 if repo.sharedpath == repo.path: |
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146 return None |
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147 |
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148 # the sharedpath always ends in the .hg; we want the path to the repo |
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149 source = repo.vfs.split(repo.sharedpath)[0] |
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150 srcurl, branches = parseurl(source) |
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151 return repository(repo.ui, srcurl) |
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152 |
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153 def getbkfile(orig, repo): |
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154 if _hassharedbookmarks(repo): |
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155 srcrepo = _getsrcrepo(repo) |
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156 if srcrepo is not None: |
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157 repo = srcrepo |
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158 return orig(repo) |
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159 |
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160 def recordchange(orig, self, tr): |
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161 # Continue with write to local bookmarks file as usual |
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162 orig(self, tr) |
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163 |
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164 if _hassharedbookmarks(self._repo): |
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165 srcrepo = _getsrcrepo(self._repo) |
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166 if srcrepo is not None: |
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167 category = 'share-bookmarks' |
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168 tr.addpostclose(category, lambda tr: self._writerepo(srcrepo)) |
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169 |
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170 def writerepo(orig, self, repo): |
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171 # First write local bookmarks file in case we ever unshare |
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172 orig(self, repo) |
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173 |
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174 if _hassharedbookmarks(self._repo): |
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175 srcrepo = _getsrcrepo(self._repo) |
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176 if srcrepo is not None: |
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177 orig(self, srcrepo) |