Mercurial > hg
annotate hgext/share.py @ 38618:c829749e7639
shelve: directly handle the initial parent alignment
Shelve is currently sub-contracting some of its work to the rebase extension.
In order to make shelve more independent and flexible we would like shelve to
handle the parent alignment directly.
After this change, we no longer need to use rebase in shelve.
Differential Revision: https://phab.mercurial-scm.org/D3693
author | Boris Feld <boris.feld@octobus.net> |
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date | Tue, 29 May 2018 00:30:50 +0200 |
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) |