Mercurial > hg
annotate hgext/share.py @ 46604:ad107ed7a4aa
ci: test real dependency installation for pip
In the past, the pip smoke test inhibited actual dependency
installation, but that fails in different environments for setuptools
itself. Since it isn't what we actually want to test (which is pip
install), allow this to call home, if HGTESTS_ALLOW_NETIO=1 is set
in the environment.
Differential Revision: https://phab.mercurial-scm.org/D9950
author | Joerg Sonnenberger <joerg@bec.de> |
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date | Thu, 04 Feb 2021 23:23:35 +0100 |
parents | c80f9e3daec3 |
children | d4ba4d51f85f |
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 The share extension introduces a new command :hg:`share` to create a new |
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9 working directory. This is similar to :hg:`clone`, but doesn't involve |
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10 copying or linking the storage of the repository. This allows working on |
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11 different branches or changes in parallel without the associated cost in |
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12 terms of disk space. |
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13 |
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14 Note: destructive operations or extensions like :hg:`rollback` should be |
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15 used with care as they can result in confusing problems. |
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16 |
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17 Automatic Pooled Storage for Clones |
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18 ----------------------------------- |
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19 |
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20 When this extension is active, :hg:`clone` can be configured to |
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21 automatically share/pool storage across multiple clones. This |
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22 mode effectively converts :hg:`clone` to :hg:`clone` + :hg:`share`. |
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23 The benefit of using this mode is the automatic management of |
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24 store paths and intelligent pooling of related repositories. |
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25 |
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26 The following ``share.`` config options influence this feature: |
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27 |
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28 ``share.pool`` |
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29 Filesystem path where shared repository data will be stored. When |
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30 defined, :hg:`clone` will automatically use shared repository |
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31 storage instead of creating a store inside each clone. |
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32 |
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33 ``share.poolnaming`` |
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34 How directory names in ``share.pool`` are constructed. |
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35 |
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36 "identity" means the name is derived from the first changeset in the |
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37 repository. In this mode, different remotes share storage if their |
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38 root/initial changeset is identical. In this mode, the local shared |
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39 repository is an aggregate of all encountered remote repositories. |
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40 |
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41 "remote" means the name is derived from the source repository's |
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42 path or URL. In this mode, storage is only shared if the path or URL |
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43 requested in the :hg:`clone` command matches exactly to a repository |
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44 that was cloned before. |
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45 |
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46 The default naming mode is "identity". |
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47 |
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48 .. container:: verbose |
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49 |
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50 Sharing requirements and configs of source repository with shares: |
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51 |
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52 By default creating a shared repository only enables sharing a common |
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53 history and does not share requirements and configs between them. This |
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54 may lead to problems in some cases, for example when you upgrade the |
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55 storage format from one repository but does not set related configs |
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56 in the shares. |
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57 |
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58 Setting `format.exp-share-safe = True` enables sharing configs and |
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59 requirements. This only applies to shares which are done after enabling |
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60 the config option. |
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61 |
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62 For enabling this in existing shares, enable the config option and reshare. |
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63 |
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64 For resharing existing shares, make sure your working directory is clean |
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65 and there are no untracked files, delete that share and create a new share. |
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66 ''' |
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67 |
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68 from __future__ import absolute_import |
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69 |
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70 import errno |
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71 from mercurial.i18n import _ |
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72 from mercurial import ( |
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73 bookmarks, |
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74 commands, |
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75 error, |
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76 extensions, |
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77 hg, |
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78 registrar, |
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79 txnutil, |
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80 util, |
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81 ) |
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82 |
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83 cmdtable = {} |
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84 command = registrar.command(cmdtable) |
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85 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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86 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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87 # be specifying the version(s) of Mercurial they are tested with, or |
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88 # leave the attribute unspecified. |
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89 testedwith = b'ships-with-hg-core' |
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90 |
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91 |
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92 @command( |
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93 b'share', |
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94 [ |
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95 (b'U', b'noupdate', None, _(b'do not create a working directory')), |
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96 (b'B', b'bookmarks', None, _(b'also share bookmarks')), |
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97 ( |
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98 b'', |
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99 b'relative', |
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100 None, |
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101 _(b'point to source using a relative path'), |
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102 ), |
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103 ], |
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104 _(b'[-U] [-B] SOURCE [DEST]'), |
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105 helpcategory=command.CATEGORY_REPO_CREATION, |
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106 norepo=True, |
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107 ) |
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108 def share( |
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109 ui, source, dest=None, noupdate=False, bookmarks=False, relative=False |
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110 ): |
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111 """create a new shared repository |
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112 |
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113 Initialize a new repository and working directory that shares its |
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114 history (and optionally bookmarks) with another repository. |
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115 |
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117 |
12389 | 118 using rollback or extensions that destroy/modify history (mq, |
119 rebase, etc.) can cause considerable confusion with shared | |
120 clones. In particular, if two shared clones are both updated to | |
121 the same changeset, and one of them destroys that changeset | |
122 with rollback, the other clone will suddenly stop working: all | |
123 operations will fail with "abort: working directory has unknown | |
124 parent". The only known workaround is to use debugsetparents on | |
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125 the broken clone to reset it to a changeset that still exists. |
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126 """ |
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127 |
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128 hg.share( |
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129 ui, |
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130 source, |
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131 dest=dest, |
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132 update=not noupdate, |
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133 bookmarks=bookmarks, |
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134 relative=relative, |
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135 ) |
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136 return 0 |
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137 |
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138 |
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139 @command(b'unshare', [], b'', helpcategory=command.CATEGORY_MAINTENANCE) |
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140 def unshare(ui, repo): |
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141 """convert a shared repository to a normal one |
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142 |
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143 Copy the store data to the repo and remove the sharedpath data. |
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144 """ |
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145 |
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146 if not repo.shared(): |
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147 raise error.Abort(_(b"this is not a shared repo")) |
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148 |
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149 hg.unshare(ui, repo) |
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150 |
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151 |
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152 # Wrap clone command to pass auto share options. |
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153 def clone(orig, ui, source, *args, **opts): |
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154 pool = ui.config(b'share', b'pool') |
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155 if pool: |
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156 pool = util.expandpath(pool) |
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157 |
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158 opts['shareopts'] = { |
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159 b'pool': pool, |
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160 b'mode': ui.config(b'share', b'poolnaming'), |
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161 } |
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162 |
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163 return orig(ui, source, *args, **opts) |
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164 |
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165 |
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166 def extsetup(ui): |
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167 extensions.wrapfunction(bookmarks, b'_getbkfile', getbkfile) |
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168 extensions.wrapfunction(bookmarks.bmstore, b'_recordchange', recordchange) |
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169 extensions.wrapfunction(bookmarks.bmstore, b'_writerepo', writerepo) |
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170 extensions.wrapcommand(commands.table, b'clone', clone) |
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171 |
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172 |
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173 def _hassharedbookmarks(repo): |
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174 """Returns whether this repo has shared bookmarks""" |
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175 if bookmarks.bookmarksinstore(repo): |
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176 # Kind of a lie, but it means that we skip our custom reads and writes |
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177 # from/to the source repo. |
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178 return False |
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179 try: |
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180 shared = repo.vfs.read(b'shared').splitlines() |
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181 except IOError as inst: |
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182 if inst.errno != errno.ENOENT: |
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183 raise |
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184 return False |
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185 return hg.sharedbookmarks in shared |
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186 |
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187 |
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188 def getbkfile(orig, repo): |
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189 if _hassharedbookmarks(repo): |
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190 srcrepo = hg.sharedreposource(repo) |
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191 if srcrepo is not None: |
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192 # just orig(srcrepo) doesn't work as expected, because |
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193 # HG_PENDING refers repo.root. |
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194 try: |
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195 fp, pending = txnutil.trypending( |
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196 repo.root, repo.vfs, b'bookmarks' |
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197 ) |
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198 if pending: |
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199 # only in this case, bookmark information in repo |
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200 # is up-to-date. |
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201 return fp |
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202 fp.close() |
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203 except IOError as inst: |
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204 if inst.errno != errno.ENOENT: |
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205 raise |
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206 |
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207 # otherwise, we should read bookmarks from srcrepo, |
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208 # because .hg/bookmarks in srcrepo might be already |
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209 # changed via another sharing repo |
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210 repo = srcrepo |
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211 |
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212 # TODO: Pending changes in repo are still invisible in |
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213 # srcrepo, because bookmarks.pending is written only into repo. |
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214 # See also https://www.mercurial-scm.org/wiki/SharedRepository |
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215 return orig(repo) |
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216 |
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217 |
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218 def recordchange(orig, self, tr): |
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219 # Continue with write to local bookmarks file as usual |
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220 orig(self, tr) |
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221 |
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222 if _hassharedbookmarks(self._repo): |
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223 srcrepo = hg.sharedreposource(self._repo) |
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224 if srcrepo is not None: |
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225 category = b'share-bookmarks' |
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226 tr.addpostclose(category, lambda tr: self._writerepo(srcrepo)) |
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227 |
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228 |
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229 def writerepo(orig, self, repo): |
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230 # First write local bookmarks file in case we ever unshare |
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231 orig(self, repo) |
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232 |
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233 if _hassharedbookmarks(self._repo): |
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234 srcrepo = hg.sharedreposource(self._repo) |
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235 if srcrepo is not None: |
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236 orig(self, srcrepo) |