Mercurial > hg
annotate hgext/share.py @ 29039:e3055b46ed1b stable
tags: silence hgtagsfnodes reading failures
tryread() doesn't handle "is a directory" errors and presumably
others. We might not want to globally swallow such tryread errors, so
we replace with our own try/except handling.
An upcoming test will use directories as a portable stand-in for
various bizarre circumstances that cache read/write code should be
robust to.
author | Matt Mackall <mpm@selenic.com> |
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date | Thu, 28 Apr 2016 15:40:43 -0500 |
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) |