Mercurial > hg
annotate mercurial/help/subrepos.txt @ 20971:557a083453c9
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author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Fri, 11 Apr 2014 13:43:41 -0400 |
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12828 | 1 Subrepositories let you nest external repositories or projects into a |
2 parent Mercurial repository, and make commands operate on them as a | |
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3 group. |
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4 |
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5 Mercurial currently supports Mercurial, Git, and Subversion |
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6 subrepositories. |
12828 | 7 |
8 Subrepositories are made of three components: | |
9 | |
10 1. Nested repository checkouts. They can appear anywhere in the | |
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11 parent working directory. |
12828 | 12 |
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13 2. Nested repository references. They are defined in ``.hgsub``, which |
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14 should be placed in the root of working directory, and |
12828 | 15 tell where the subrepository checkouts come from. Mercurial |
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16 subrepositories are referenced like:: |
12828 | 17 |
18 path/to/nested = https://example.com/nested/repo/path | |
19 | |
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20 Git and Subversion subrepos are also supported:: |
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21 |
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22 path/to/nested = [git]git://example.com/nested/repo/path |
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23 path/to/nested = [svn]https://example.com/nested/trunk/path |
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24 |
12828 | 25 where ``path/to/nested`` is the checkout location relatively to the |
26 parent Mercurial root, and ``https://example.com/nested/repo/path`` | |
27 is the source repository path. The source can also reference a | |
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28 filesystem path. |
12828 | 29 |
30 Note that ``.hgsub`` does not exist by default in Mercurial | |
31 repositories, you have to create and add it to the parent | |
32 repository before using subrepositories. | |
33 | |
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34 3. Nested repository states. They are defined in ``.hgsubstate``, which |
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35 is placed in the root of working directory, and |
12828 | 36 capture whatever information is required to restore the |
37 subrepositories to the state they were committed in a parent | |
38 repository changeset. Mercurial automatically record the nested | |
39 repositories states when committing in the parent repository. | |
40 | |
41 .. note:: | |
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42 |
12828 | 43 The ``.hgsubstate`` file should not be edited manually. |
44 | |
45 | |
46 Adding a Subrepository | |
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47 ====================== |
12828 | 48 |
49 If ``.hgsub`` does not exist, create it and add it to the parent | |
50 repository. Clone or checkout the external projects where you want it | |
51 to live in the parent repository. Edit ``.hgsub`` and add the | |
52 subrepository entry as described above. At this point, the | |
53 subrepository is tracked and the next commit will record its state in | |
54 ``.hgsubstate`` and bind it to the committed changeset. | |
55 | |
56 Synchronizing a Subrepository | |
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57 ============================= |
12828 | 58 |
59 Subrepos do not automatically track the latest changeset of their | |
60 sources. Instead, they are updated to the changeset that corresponds | |
61 with the changeset checked out in the top-level changeset. This is so | |
62 developers always get a consistent set of compatible code and | |
63 libraries when they update. | |
64 | |
65 Thus, updating subrepos is a manual process. Simply check out target | |
66 subrepo at the desired revision, test in the top-level repo, then | |
67 commit in the parent repository to record the new combination. | |
68 | |
69 Deleting a Subrepository | |
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70 ======================== |
12828 | 71 |
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72 To remove a subrepository from the parent repository, delete its |
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73 reference from ``.hgsub``, then remove its files. |
12828 | 74 |
75 Interaction with Mercurial Commands | |
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76 =================================== |
12828 | 77 |
78 :add: add does not recurse in subrepos unless -S/--subrepos is | |
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79 specified. However, if you specify the full path of a file in a |
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80 subrepo, it will be added even without -S/--subrepos specified. |
15432 | 81 Git and Subversion subrepositories are currently silently |
12828 | 82 ignored. |
83 | |
84 :archive: archive does not recurse in subrepositories unless | |
85 -S/--subrepos is specified. | |
86 | |
87 :commit: commit creates a consistent snapshot of the state of the | |
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88 entire project and its subrepositories. If any subrepositories |
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89 have been modified, Mercurial will abort. Mercurial can be made |
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90 to instead commit all modified subrepositories by specifying |
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91 -S/--subrepos, or setting "ui.commitsubrepos=True" in a |
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92 configuration file (see :hg:`help config`). After there are no |
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93 longer any modified subrepositories, it records their state and |
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94 finally commits it in the parent repository. |
12828 | 95 |
96 :diff: diff does not recurse in subrepos unless -S/--subrepos is | |
97 specified. Changes are displayed as usual, on the subrepositories | |
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98 elements. Git and Subversion subrepositories are currently |
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99 silently ignored. |
12828 | 100 |
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101 :forget: forget currently only handles exact file matches in subrepos. |
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102 Git and Subversion subrepositories are currently silently ignored. |
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103 |
12828 | 104 :incoming: incoming does not recurse in subrepos unless -S/--subrepos |
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105 is specified. Git and Subversion subrepositories are currently |
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106 silently ignored. |
12828 | 107 |
108 :outgoing: outgoing does not recurse in subrepos unless -S/--subrepos | |
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109 is specified. Git and Subversion subrepositories are currently |
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110 silently ignored. |
12828 | 111 |
112 :pull: pull is not recursive since it is not clear what to pull prior | |
113 to running :hg:`update`. Listing and retrieving all | |
114 subrepositories changes referenced by the parent repository pulled | |
115 changesets is expensive at best, impossible in the Subversion | |
116 case. | |
117 | |
118 :push: Mercurial will automatically push all subrepositories first | |
119 when the parent repository is being pushed. This ensures new | |
120 subrepository changes are available when referenced by top-level | |
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121 repositories. Push is a no-op for Subversion subrepositories. |
12828 | 122 |
123 :status: status does not recurse into subrepositories unless | |
124 -S/--subrepos is specified. Subrepository changes are displayed as | |
125 regular Mercurial changes on the subrepository | |
126 elements. Subversion subrepositories are currently silently | |
127 ignored. | |
128 | |
129 :update: update restores the subrepos in the state they were | |
130 originally committed in target changeset. If the recorded | |
131 changeset is not available in the current subrepository, Mercurial | |
132 will pull it in first before updating. This means that updating | |
133 can require network access when using subrepositories. | |
134 | |
135 Remapping Subrepositories Sources | |
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136 ================================= |
12828 | 137 |
138 A subrepository source location may change during a project life, | |
139 invalidating references stored in the parent repository history. To | |
140 fix this, rewriting rules can be defined in parent repository ``hgrc`` | |
141 file or in Mercurial configuration. See the ``[subpaths]`` section in | |
142 hgrc(5) for more details. | |
143 |