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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 | cmdtable = {} |
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56 | 56 | command = registrar.command(cmdtable) |
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57 | 57 | # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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58 | 58 | # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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59 | 59 | # be specifying the version(s) of Mercurial they are tested with, or |
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60 | 60 | # leave the attribute unspecified. |
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61 | 61 | testedwith = b'ships-with-hg-core' |
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62 | 62 | |
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63 | 63 | |
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64 | 64 | @command( |
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65 | 65 | b'share', |
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66 | 66 | [ |
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67 | 67 | (b'U', b'noupdate', None, _(b'do not create a working directory')), |
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68 | 68 | (b'B', b'bookmarks', None, _(b'also share bookmarks')), |
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69 | ( | |
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70 | b'', | |
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71 | b'relative', | |
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72 | None, | |
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73 | _(b'point to source using a relative path (EXPERIMENTAL)'), | |
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74 | ), | |
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69 | (b'', b'relative', None, _(b'point to source using a relative path'),), | |
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75 | 70 | ], |
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76 | 71 | _(b'[-U] [-B] SOURCE [DEST]'), |
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77 | 72 | helpcategory=command.CATEGORY_REPO_CREATION, |
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78 | 73 | norepo=True, |
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79 | 74 | ) |
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80 | 75 | def share( |
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81 | 76 | ui, source, dest=None, noupdate=False, bookmarks=False, relative=False |
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82 | 77 | ): |
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83 | 78 | """create a new shared repository |
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84 | 79 | |
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85 | 80 | Initialize a new repository and working directory that shares its |
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86 | 81 | history (and optionally bookmarks) with another repository. |
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87 | 82 | |
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88 | 83 | .. note:: |
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89 | 84 | |
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90 | 85 | using rollback or extensions that destroy/modify history (mq, |
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91 | 86 | rebase, etc.) can cause considerable confusion with shared |
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92 | 87 | clones. In particular, if two shared clones are both updated to |
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93 | 88 | the same changeset, and one of them destroys that changeset |
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94 | 89 | with rollback, the other clone will suddenly stop working: all |
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95 | 90 | operations will fail with "abort: working directory has unknown |
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96 | 91 | parent". The only known workaround is to use debugsetparents on |
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97 | 92 | the broken clone to reset it to a changeset that still exists. |
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98 | 93 | """ |
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99 | 94 | |
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100 | 95 | hg.share( |
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101 | 96 | ui, |
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102 | 97 | source, |
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103 | 98 | dest=dest, |
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104 | 99 | update=not noupdate, |
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105 | 100 | bookmarks=bookmarks, |
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106 | 101 | relative=relative, |
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107 | 102 | ) |
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108 | 103 | return 0 |
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109 | 104 | |
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110 | 105 | |
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111 | 106 | @command(b'unshare', [], b'', helpcategory=command.CATEGORY_MAINTENANCE) |
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112 | 107 | def unshare(ui, repo): |
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113 | 108 | """convert a shared repository to a normal one |
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114 | 109 | |
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115 | 110 | Copy the store data to the repo and remove the sharedpath data. |
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116 | 111 | """ |
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117 | 112 | |
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118 | 113 | if not repo.shared(): |
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119 | 114 | raise error.Abort(_(b"this is not a shared repo")) |
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120 | 115 | |
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121 | 116 | hg.unshare(ui, repo) |
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122 | 117 | |
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123 | 118 | |
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124 | 119 | # Wrap clone command to pass auto share options. |
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125 | 120 | def clone(orig, ui, source, *args, **opts): |
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126 | 121 | pool = ui.config(b'share', b'pool') |
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127 | 122 | if pool: |
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128 | 123 | pool = util.expandpath(pool) |
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129 | 124 | |
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130 | 125 | opts[r'shareopts'] = { |
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131 | 126 | b'pool': pool, |
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132 | 127 | b'mode': ui.config(b'share', b'poolnaming'), |
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133 | 128 | } |
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134 | 129 | |
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135 | 130 | return orig(ui, source, *args, **opts) |
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136 | 131 | |
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137 | 132 | |
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138 | 133 | def extsetup(ui): |
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139 | 134 | extensions.wrapfunction(bookmarks, b'_getbkfile', getbkfile) |
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140 | 135 | extensions.wrapfunction(bookmarks.bmstore, b'_recordchange', recordchange) |
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141 | 136 | extensions.wrapfunction(bookmarks.bmstore, b'_writerepo', writerepo) |
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142 | 137 | extensions.wrapcommand(commands.table, b'clone', clone) |
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143 | 138 | |
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144 | 139 | |
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145 | 140 | def _hassharedbookmarks(repo): |
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146 | 141 | """Returns whether this repo has shared bookmarks""" |
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147 | 142 | if bookmarks.bookmarksinstore(repo): |
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148 | 143 | # Kind of a lie, but it means that we skip our custom reads and writes |
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149 | 144 | # from/to the source repo. |
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150 | 145 | return False |
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151 | 146 | try: |
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152 | 147 | shared = repo.vfs.read(b'shared').splitlines() |
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153 | 148 | except IOError as inst: |
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154 | 149 | if inst.errno != errno.ENOENT: |
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155 | 150 | raise |
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156 | 151 | return False |
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157 | 152 | return hg.sharedbookmarks in shared |
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158 | 153 | |
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159 | 154 | |
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160 | 155 | def getbkfile(orig, repo): |
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161 | 156 | if _hassharedbookmarks(repo): |
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162 | 157 | srcrepo = hg.sharedreposource(repo) |
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163 | 158 | if srcrepo is not None: |
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164 | 159 | # just orig(srcrepo) doesn't work as expected, because |
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165 | 160 | # HG_PENDING refers repo.root. |
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166 | 161 | try: |
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167 | 162 | fp, pending = txnutil.trypending( |
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168 | 163 | repo.root, repo.vfs, b'bookmarks' |
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169 | 164 | ) |
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170 | 165 | if pending: |
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171 | 166 | # only in this case, bookmark information in repo |
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172 | 167 | # is up-to-date. |
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173 | 168 | return fp |
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174 | 169 | fp.close() |
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175 | 170 | except IOError as inst: |
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176 | 171 | if inst.errno != errno.ENOENT: |
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177 | 172 | raise |
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178 | 173 | |
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179 | 174 | # otherwise, we should read bookmarks from srcrepo, |
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180 | 175 | # because .hg/bookmarks in srcrepo might be already |
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181 | 176 | # changed via another sharing repo |
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182 | 177 | repo = srcrepo |
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183 | 178 | |
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184 | 179 | # TODO: Pending changes in repo are still invisible in |
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185 | 180 | # srcrepo, because bookmarks.pending is written only into repo. |
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186 | 181 | # See also https://www.mercurial-scm.org/wiki/SharedRepository |
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187 | 182 | return orig(repo) |
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188 | 183 | |
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189 | 184 | |
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190 | 185 | def recordchange(orig, self, tr): |
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191 | 186 | # Continue with write to local bookmarks file as usual |
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192 | 187 | orig(self, tr) |
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193 | 188 | |
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194 | 189 | if _hassharedbookmarks(self._repo): |
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195 | 190 | srcrepo = hg.sharedreposource(self._repo) |
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196 | 191 | if srcrepo is not None: |
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197 | 192 | category = b'share-bookmarks' |
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198 | 193 | tr.addpostclose(category, lambda tr: self._writerepo(srcrepo)) |
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199 | 194 | |
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200 | 195 | |
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201 | 196 | def writerepo(orig, self, repo): |
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202 | 197 | # First write local bookmarks file in case we ever unshare |
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203 | 198 | orig(self, repo) |
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204 | 199 | |
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205 | 200 | if _hassharedbookmarks(self._repo): |
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206 | 201 | srcrepo = hg.sharedreposource(self._repo) |
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207 | 202 | if srcrepo is not None: |
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208 | 203 | orig(self, srcrepo) |
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