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Changes between Initial Version and Version 1 of TracRepositoryAdmin


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Timestamp:
May 13, 2015, 11:55:11 PM (3 years ago)
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trac
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  • TracRepositoryAdmin

    v1 v1  
     1= Repository Administration =
     2[[PageOutline(2-3)]]
     3
     4== Quick start == #QuickStart
     5
     6 * Manage repositories in the "Repository" admin panel, with `trac-admin` or in the `[repositories]` section of [wiki:TracIni#repositories-section trac.ini].
     7 * Set up a call to `trac-admin $ENV changeset added $REPO $REV` in the post-commit hook of each repository. Additionally, add a call to `trac-admin $ENV changeset modified $REPO $REV` in the post-revprop-change hook of repositories allowing revision property changes.
     8 * Set the `[trac] repository_sync_per_request` option to an empty value to disable per-request syncing.
     9 * Make sure the user under which your Subversion hooks are run has write access to the Trac environment, or use a tool like `sudo` to temporarily elevate privileges.
     10
     11== Specifying repositories == #Repositories
     12Starting with 0.12, Trac can handle more than one repository per environment. The pre-0.12 way of specifying the repository with the `repository_dir` and `repository_type` options in the `[trac]` section of [wiki:TracIni trac.ini] is still supported, but two new mechanisms allow including additional repositories into an environment.
     13
     14It is also possible to define aliases of repositories, that act as "pointers" to real repositories. This can be useful when renaming a repository, to avoid breaking all the links to the old name.
     15
     16A number of attributes can be associated with each repository, which define the repository's location, type, name and how it is displayed in the source browser. The following attributes are supported:
     17
     18||='''Attribute''' =||='''Description''' =||
     19||`alias` ||\
     20||A repository having an `alias` attribute is an alias to a real repository. All TracLinks referencing the alias resolve to the aliased repository. Note that multiple indirection is not supported, so an alias must always point to a real repository. The `alias` and `dir` attributes are mutually exclusive. ||
     21||`description` ||\
     22||The text specified in the `description` attribute is displayed below the top-level entry for the repository in the source browser. It supports WikiFormatting. ||
     23||`dir` ||\
     24||The `dir` attribute specifies the location of the repository in the filesystem. It corresponds to the value previously specified in the option `[trac] repository_dir`. The `alias` and `dir` attributes are mutually exclusive. ||
     25||`hidden` ||When set to `true`, the repository is hidden from the repository index page in the source browser. Browsing the repository is still possible, and links referencing the repository remain valid. ||
     26||`type` ||The `type` attribute sets the type of version control system used by the repository. Trac supports Subversion and Git out-of-the-box, and plugins add support for many other systems. If `type` is not specified, it defaults to the value of the `[trac] repository_type` option. ||
     27||`url` ||The `url` attribute specifies the root URL to be used for checking out from the repository. When specified, a "Repository URL" link is added to the context navigation links in the source browser, that can be copied into the tool used for creating the working copy. ||
     28
     29A repository `name` and one of `alias` or `dir` attributes are mandatory. All others are optional.
     30
     31After adding a repository, the cache for that repository must be re-synchronized once with the `trac-admin $ENV repository resync` command.
     32
     33 `repository resync <repos>`::
     34   Re-synchronize Trac with a repository.
     35
     36
     37=== In `trac.ini` === #ReposTracIni
     38Repositories and repository attributes can be specified in the `[repositories]` section of [wiki:TracIni#repositories-section trac.ini]. Every attribute consists of a key structured as `{name}.{attribute}` and the corresponding value separated with an equal sign (`=`). The name of the default repository is empty.
     39
     40The main advantage of specifying repositories in `trac.ini` is that they can be inherited from a global configuration (see the [wiki:TracIni#GlobalConfiguration global configuration] section of TracIni). One drawback is that, due to limitations in the `ConfigParser` class used to parse `trac.ini`, the repository name is always all-lowercase.
     41
     42The following example defines two Subversion repositories named `project` and `lib`, and an alias to `project` as the default repository. This is a typical use case where a Trac environment previously had a single repository (the `project` repository), and was converted to multiple repositories. The alias ensures that links predating the change continue to resolve to the `project` repository.
     43{{{
     44#!ini
     45[repositories]
     46project.dir = /var/repos/project
     47project.description = This is the ''main'' project repository.
     48project.type = svn
     49project.url = http://example.com/svn/project
     50project.hidden = true
     51
     52lib.dir = /var/repos/lib
     53lib.description = This is the secondary library code.
     54lib.type = svn
     55lib.url = http://example.com/svn/lib
     56
     57.alias = project
     58}}}
     59Note that `name.alias = target` makes `name` an alias for the `target` repo, not the other way around.
     60
     61=== In the database === #ReposDatabase
     62Repositories can also be specified in the database, using either the "Repositories" admin panel under "Version Control", or the `trac-admin $ENV repository` commands.
     63
     64The admin panel shows the list of all repositories defined in the Trac environment. It allows adding repositories and aliases, editing repository attributes and removing repositories. Note that repositories defined in `trac.ini` are displayed but cannot be edited.
     65
     66The following [wiki:TracAdmin trac-admin] commands can be used to perform repository operations from the command line.
     67
     68 `repository add <repos> <dir> [type]`::
     69   Add a repository `<repos>` located at `<dir>`, and optionally specify its type.
     70
     71 `repository alias <name> <target>`::
     72   Create an alias `<name>` for the repository `<target>`.
     73
     74 `repository remove <repos>`::
     75   Remove the repository `<repos>`.
     76
     77 `repository set <repos> <key> <value>`::
     78   Set the attribute `<key>` to `<value>` for the repository `<repos>`.
     79
     80Note that the default repository has an empty name, so it will likely need to be quoted when running `trac-admin` from a shell. Alternatively, the name "`(default)`" can be used instead, for example when running `trac-admin` in interactive mode.
     81
     82
     83== Repository synchronization == #Synchronization
     84Prior to 0.12, Trac synchronized its cache with the repository on every HTTP request. This approach is not very efficient and not practical anymore with multiple repositories. For this reason, explicit synchronization through post-commit hooks was added.
     85
     86There is also new functionality in the form of a repository listener extension point ''(IRepositoryChangeListener)'' that is triggered by the post-commit hook when a changeset is added or modified, and can be used by plugins to perform actions on commit.
     87
     88=== Mercurial Repositories ===
     89Please note that at the time of writing, no initial resynchronization or any hooks are necessary for Mercurial repositories - see [trac:#9485] for more information.
     90
     91=== Explicit synchronization === #ExplicitSync
     92This is the preferred method of repository synchronization. It requires setting the `[trac]  repository_sync_per_request` option in [wiki:TracIni#trac-section trac.ini] to an empty value, and adding a call to `trac-admin` in the `post-commit` hook of each repository. Additionally, if a repository allows changing revision metadata, a call to `trac-admin` must be added to the `post-revprop-change` hook as well.
     93
     94 `changeset added <repos> <rev> [...]`::
     95   Notify Trac that one or more changesets have been added to a repository.
     96
     97 `changeset modified <repos> <rev> [...]`::
     98   Notify Trac that metadata on one or more changesets in a repository has been modified.
     99
     100The `<repos>` argument can be either a repository name (use "`(default)`" for the default repository) or the path to the repository.
     101
     102Note that you may have to set the environment variable `PYTHON_EGG_CACHE` to the same value as was used for the web server configuration before calling `trac-admin`, if you changed it from its default location. See [wiki:TracPlugins Trac Plugins] for more information.
     103
     104==== Subversion ====
     105
     106The following examples are complete post-commit and post-revprop-change scripts for Subversion. They should be edited for the specific environment, marked executable (where applicable) and placed in the `hooks` directory of each repository. On Unix (`post-commit`):
     107{{{#!sh
     108#!/bin/sh
     109export PYTHON_EGG_CACHE="/path/to/dir"
     110/usr/bin/trac-admin /path/to/env changeset added "$1" "$2"
     111}}}
     112Note: Check with `whereis trac-admin`, whether `trac-admin` is really installed under `/usr/bin/` or maybe under `/usr/local/bin/` and adapt the path.
     113On Windows (`post-commit.cmd`):
     114{{{#!bat
     115@C:\Python26\Scripts\trac-admin.exe C:\path\to\env changeset added "%1" "%2"
     116}}}
     117
     118The post-revprop-change hook for Subversion is very similar. On Unix (`post-revprop-change`):
     119{{{#!sh
     120#!/bin/sh
     121export PYTHON_EGG_CACHE="/path/to/dir"
     122/usr/bin/trac-admin /path/to/env changeset modified "$1" "$2"
     123}}}
     124On Windows (`post-revprop-change.cmd`):
     125{{{#!bat
     126@C:\Python26\Scripts\trac-admin.exe C:\path\to\env changeset modified "%1" "%2"
     127}}}
     128
     129The Unix variants above assume that the user running the Subversion commit has write access to the Trac environment, which is the case in the standard configuration where both the repository and Trac are served by the web server. If you access the repository through another means, for example `svn+ssh://`, you may have to run `trac-admin` with different privileges, for example by using `sudo`.
     130
     131Note that calling `trac-admin` in your Subversion hooks can slow down the commit and log editing operations on the client side. You might want to use the [trac:source:trunk/contrib/trac-svn-hook contrib/trac-svn-hook] script which starts `trac-admin` in an asynchronous way. The script also comes with a number of safety checks and usage advices which should make it easier to set up and test your hooks. There's no equivalent `trac-svn-hook.bat` for Windows yet, but the script can be run by Cygwin's bash.
     132
     133See the [http://svnbook.red-bean.com/en/1.5/svn.reposadmin.create.html#svn.reposadmin.create.hooks section about hooks] in the Subversion book for more information. Other repository types will require different hook setups.
     134
     135==== Git ====
     136
     137Git hooks can be used in the same way for explicit syncing of Git repositories.  If your git repository is one that gets committed to directly on the machine that hosts trac, add the following to the `hooks/post-receive` file in your git repo (note: this will do nothing if you only update the repo by pushing to it):
     138{{{#!sh
     139#!/bin/sh
     140REV=$(git rev-parse HEAD)
     141trac-admin /path/to/env changeset added <repos> $REV
     142}}}
     143
     144Alternately, if your repository is one that only gets pushed to, add the following to the `hooks/post-receive` file in the repo:
     145{{{#!sh
     146#!/bin/sh
     147while read oldrev newrev refname; do
     148        git rev-list --reverse $newrev ^$oldrev  | \
     149        while read rev; do
     150                trac-admin /path/to/env changeset added <repos> $rev
     151        done
     152done
     153}}}
     154
     155The `<repos>` argument can be either a repository name (use "`(default)`" for the default repository) or the path to the repository.
     156
     157==== Mercurial ====
     158
     159For Mercurial, add the following entries to the `.hgrc` file of each repository accessed by Trac (if [trac:TracMercurial] is installed in a Trac `plugins` directory, download [trac:source:mercurial-plugin/tracext/hg/hooks.py hooks.py] and place it somewhere accessible):
     160{{{#!ini
     161[hooks]
     162; If mercurial-plugin is installed globally
     163commit = python:tracext.hg.hooks.add_changesets
     164changegroup = python:tracext.hg.hooks.add_changesets
     165
     166; If mercurial-plugin is installed in a Trac plugins directory
     167commit = python:/path/to/hooks.py:add_changesets
     168changegroup = python:/path/to/hooks.py:add_changesets
     169
     170[trac]
     171env = /path/to/env
     172trac-admin = /path/to/trac-admin
     173}}}
     174
     175=== Per-request synchronization === #PerRequestSync
     176If the post-commit hooks are not available, the environment can be set up for per-request synchronization. In that case, the `[trac] repository_sync_per_request` option in [wiki:TracIni#trac-section trac.ini] must be set to a comma-separated list of repository names to be synchronized.
     177
     178Note that in this case, the changeset listener extension point is not called, and therefore plugins using it will not work correctly.
     179
     180
     181== Migration from a single-repository setup (Subversion) == #Migration
     182The following procedure illustrates a typical migration from a Subversion single-repository setup to multiple repositories.
     183
     184 1. Remove the default repository specification from the `[trac] repository_dir` option.
     185 1. Add the main repository as a named repository.
     186 1. Re-synchronize the main repository.
     187 1. Set up post-commit and post-revprop-change hooks on the "main" repository, and set `[trac] repository_sync_per_request` to an empty value.
     188 1. Add an alias to the main repository as the default repository (by leaving out the the `name`, e.g. `.alias = main`). This ensures that all links predating the migration still resolve to the main repository.
     189 1. Repeat steps 2, 3 and 4 to add other "named" repositories as needed.
     190
     191== Migration from a single-repository setup (Mercurial) == #MigrationMercurial
     192The following procedure illustrates a typical migration from a Mercurial single-repository setup to multiple repositories. Please note that at the time of writing, no initial resynchronization or any hooks are necessary for Mercurial repositories - see [trac:ticket:9485 #9485] for more information.
     193
     194 1. Upgrade to the latest version of the TracMercurial plugin.
     195 1. Remove the default repository specification from the `[trac] repository_dir` option.
     196 1. Add the main repository as a named repository.
     197 1. Add an alias to the main repository as the default repository (by leaving out the the `name`, e.g. `.alias = main`). This ensures that all links predating the migration still resolve to the main repository.
     198 1. Repeat step 3 to add other "named" repositories as needed.
     199
     200== Troubleshooting ==
     201
     202=== My trac-post-commit-hook doesn't work anymore === #trac-post-commit-hook
     203
     204You must now use the optional components from `tracopt.ticket.commit_updater.*`, which you can activate through the Plugins panel in the Administrative part of the web interface, or by directly modifying the [TracIni#components-section "[components]"] section in the trac.ini. Be sure to use [#ExplicitSync explicit synchronization] as explained above.