Mercurial > hg
annotate hgext/share.py @ 36487:dabf86721200
sshpeer: factor out code for creating peers from pipes
An upcoming commit will want to instantiate an SSH peer via
an alternate mechanism that doesn't require running a new
`ssh` command. To facilitate that, we extract the code for
creating a peer from pipes to its own function.
Differential Revision: https://phab.mercurial-scm.org/D2391
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 25 Feb 2018 11:00:53 -0800 |
parents | 0fe7e39dc683 |
children | c303d65d2e34 |
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 __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 cmdtable = {} |
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56 command = registrar.command(cmdtable) |
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57 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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58 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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59 # be specifying the version(s) of Mercurial they are tested with, or |
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60 # leave the attribute unspecified. |
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61 testedwith = 'ships-with-hg-core' |
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62 |
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63 @command('share', |
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64 [('U', 'noupdate', None, _('do not create a working directory')), |
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65 ('B', 'bookmarks', None, _('also share bookmarks')), |
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66 ('', 'relative', None, _('point to source using a relative path ' |
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67 '(EXPERIMENTAL)')), |
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68 ], |
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69 _('[-U] [-B] SOURCE [DEST]'), |
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70 norepo=True) |
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71 def share(ui, source, dest=None, noupdate=False, bookmarks=False, |
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72 relative=False): |
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73 """create a new shared repository |
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74 |
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75 Initialize a new repository and working directory that shares its |
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76 history (and optionally bookmarks) with another repository. |
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77 |
12389 | 78 .. note:: |
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79 |
12389 | 80 using rollback or extensions that destroy/modify history (mq, |
81 rebase, etc.) can cause considerable confusion with shared | |
82 clones. In particular, if two shared clones are both updated to | |
83 the same changeset, and one of them destroys that changeset | |
84 with rollback, the other clone will suddenly stop working: all | |
85 operations will fail with "abort: working directory has unknown | |
86 parent". The only known workaround is to use debugsetparents on | |
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87 the broken clone to reset it to a changeset that still exists. |
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88 """ |
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89 |
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90 hg.share(ui, source, dest=dest, update=not noupdate, |
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91 bookmarks=bookmarks, relative=relative) |
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92 return 0 |
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93 |
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94 @command('unshare', [], '') |
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95 def unshare(ui, repo): |
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96 """convert a shared repository to a normal one |
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97 |
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98 Copy the store data to the repo and remove the sharedpath data. |
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99 """ |
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100 |
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101 if not repo.shared(): |
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102 raise error.Abort(_("this is not a shared repo")) |
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103 |
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104 hg.unshare(ui, repo) |
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105 |
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106 # Wrap clone command to pass auto share options. |
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107 def clone(orig, ui, source, *args, **opts): |
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108 pool = ui.config('share', 'pool') |
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109 if pool: |
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110 pool = util.expandpath(pool) |
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111 |
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112 opts[r'shareopts'] = { |
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113 'pool': pool, |
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114 'mode': ui.config('share', 'poolnaming'), |
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115 } |
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116 |
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117 return orig(ui, source, *args, **opts) |
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118 |
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119 def extsetup(ui): |
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120 extensions.wrapfunction(bookmarks, '_getbkfile', getbkfile) |
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121 extensions.wrapfunction(bookmarks.bmstore, '_recordchange', recordchange) |
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122 extensions.wrapfunction(bookmarks.bmstore, '_writerepo', writerepo) |
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123 extensions.wrapcommand(commands.table, 'clone', clone) |
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124 |
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125 def _hassharedbookmarks(repo): |
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126 """Returns whether this repo has shared bookmarks""" |
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127 try: |
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128 shared = repo.vfs.read('shared').splitlines() |
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129 except IOError as inst: |
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130 if inst.errno != errno.ENOENT: |
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131 raise |
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132 return False |
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133 return hg.sharedbookmarks in shared |
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134 |
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135 def getbkfile(orig, repo): |
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136 if _hassharedbookmarks(repo): |
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137 srcrepo = hg.sharedreposource(repo) |
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138 if srcrepo is not None: |
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139 # just orig(srcrepo) doesn't work as expected, because |
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140 # HG_PENDING refers repo.root. |
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141 try: |
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142 fp, pending = txnutil.trypending(repo.root, repo.vfs, |
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143 'bookmarks') |
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144 if pending: |
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145 # only in this case, bookmark information in repo |
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146 # is up-to-date. |
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147 return fp |
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148 fp.close() |
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149 except IOError as inst: |
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150 if inst.errno != errno.ENOENT: |
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151 raise |
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152 |
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153 # otherwise, we should read bookmarks from srcrepo, |
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154 # because .hg/bookmarks in srcrepo might be already |
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155 # changed via another sharing repo |
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156 repo = srcrepo |
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157 |
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158 # TODO: Pending changes in repo are still invisible in |
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159 # srcrepo, because bookmarks.pending is written only into repo. |
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160 # See also https://www.mercurial-scm.org/wiki/SharedRepository |
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161 return orig(repo) |
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162 |
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163 def recordchange(orig, self, tr): |
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164 # Continue with write to local bookmarks file as usual |
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165 orig(self, tr) |
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166 |
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167 if _hassharedbookmarks(self._repo): |
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168 srcrepo = hg.sharedreposource(self._repo) |
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169 if srcrepo is not None: |
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170 category = 'share-bookmarks' |
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171 tr.addpostclose(category, lambda tr: self._writerepo(srcrepo)) |
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172 |
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173 def writerepo(orig, self, repo): |
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174 # First write local bookmarks file in case we ever unshare |
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175 orig(self, repo) |
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176 |
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177 if _hassharedbookmarks(self._repo): |
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178 srcrepo = hg.sharedreposource(self._repo) |
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179 if srcrepo is not None: |
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180 orig(self, srcrepo) |