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