Changes between Initial Version and Version 1 of TracRepositoryAdmin


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Timestamp:
Apr 22, 2015 3:38:18 PM (4 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{{{#!ini
     44[repositories]
     45project.dir = /var/repos/project
     46project.description = This is the ''main'' project repository.
     47project.type = svn
     48project.url = http://example.com/svn/project
     49project.hidden = true
     50
     51lib.dir = /var/repos/lib
     52lib.description = This is the secondary library code.
     53lib.type = svn
     54lib.url = http://example.com/svn/lib
     55
     56.alias = project
     57}}}
     58Note that `name.alias = target` makes `name` an alias for the `target` repo, not the other way around.
     59
     60=== In the database #ReposDatabase
     61Repositories can also be specified in the database, using either the "Repositories" admin panel under "Version Control", or the `trac-admin $ENV repository` commands.
     62
     63The 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.
     64
     65The following [wiki:TracAdmin trac-admin] commands can be used to perform repository operations from the command line.
     66
     67 `repository add <repos> <dir> [type]`::
     68   Add a repository `<repos>` located at `<dir>`, and optionally specify its type.
     69
     70 `repository alias <name> <target>`::
     71   Create an alias `<name>` for the repository `<target>`.
     72
     73 `repository remove <repos>`::
     74   Remove the repository `<repos>`.
     75
     76 `repository set <repos> <key> <value>`::
     77   Set the attribute `<key>` to `<value>` for the repository `<repos>`.
     78
     79Note 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.
     80
     81
     82== Repository synchronization #Synchronization
     83Prior 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.
     84
     85There 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.
     86
     87=== Mercurial Repositories
     88Please note that at the time of writing, no initial resynchronization or any hooks are necessary for Mercurial repositories - see [trac:#9485] for more information.
     89
     90=== Explicit synchronization #ExplicitSync
     91This 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.
     92
     93 `changeset added <repos> <rev> [...]`::
     94   Notify Trac that one or more changesets have been added to a repository.
     95
     96 `changeset modified <repos> <rev> [...]`::
     97   Notify Trac that metadata on one or more changesets in a repository has been modified.
     98
     99The `<repos>` argument can be either a repository name (use "`(default)`" for the default repository) or the path to the repository.
     100
     101Note 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.
     102
     103==== Subversion
     104
     105The 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`):
     106{{{#!sh
     107#!/bin/sh
     108export PYTHON_EGG_CACHE="/path/to/dir"
     109/usr/bin/trac-admin /path/to/env changeset added "$1" "$2"
     110}}}
     111Note: Check with `whereis trac-admin`, whether `trac-admin` is really installed under `/usr/bin/` or maybe under `/usr/local/bin/` and adapt the path.
     112On Windows (`post-commit.cmd`):
     113{{{#!bat
     114@C:\Python26\Scripts\trac-admin.exe C:\path\to\env changeset added "%1" "%2"
     115}}}
     116
     117The post-revprop-change hook for Subversion is very similar. On Unix (`post-revprop-change`):
     118{{{#!sh
     119#!/bin/sh
     120export PYTHON_EGG_CACHE="/path/to/dir"
     121/usr/bin/trac-admin /path/to/env changeset modified "$1" "$2"
     122}}}
     123On Windows (`post-revprop-change.cmd`):
     124{{{#!bat
     125@C:\Python26\Scripts\trac-admin.exe C:\path\to\env changeset modified "%1" "%2"
     126}}}
     127
     128The Unix variants above assume that the user running the Subversion commit has write access to the Trac environment, which is the case in the standard configuration where both the repository and Trac are served by the web server. If you access the repository through another means, for example `svn+ssh://`, you may have to run `trac-admin` with different privileges, for example by using `sudo`.
     129
     130Note that calling `trac-admin` in your Subversion hooks can slow down the commit and log editing operations on the client side. You might want to use the [trac:source:trunk/contrib/trac-svn-hook contrib/trac-svn-hook] script which starts `trac-admin` in an asynchronous way. The script also comes with a number of safety checks and usage advices which should make it easier to set up and test your hooks. There's no equivalent `trac-svn-hook.bat` for Windows yet, but the script can be run by Cygwin's bash.
     131
     132See the [http://svnbook.red-bean.com/en/1.5/svn.reposadmin.create.html#svn.reposadmin.create.hooks section about hooks] in the Subversion book for more information. Other repository types will require different hook setups.
     133
     134==== Git
     135
     136Git hooks can be used in the same way for explicit syncing of Git repositories.  If your git repository is one that gets committed to directly on the machine that hosts trac, add the following to the `hooks/post-commit` file in your git repo (note: this will do nothing if you only update the repo by pushing to it):
     137{{{#!sh
     138#!/bin/sh
     139REV=$(git rev-parse HEAD)
     140trac-admin /path/to/env changeset added <repos> $REV
     141}}}
     142
     143Alternately, if your repository is one that only gets pushed to, add the following to the `hooks/post-receive` file in the repo:
     144{{{#!sh
     145#!/bin/sh
     146while read oldrev newrev refname; do
     147        git rev-list --reverse $newrev ^$oldrev  | \
     148        while read rev; do
     149                trac-admin /path/to/env changeset added <repos> $rev
     150        done
     151done
     152}}}
     153
     154The `<repos>` argument can be either a repository name (use "`(default)`" for the default repository) or the path to the repository.
     155
     156==== Mercurial
     157
     158For 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):
     159{{{#!ini
     160[hooks]
     161; If mercurial-plugin is installed globally
     162commit = python:tracext.hg.hooks.add_changesets
     163changegroup = python:tracext.hg.hooks.add_changesets
     164
     165; If mercurial-plugin is installed in a Trac plugins directory
     166commit = python:/path/to/hooks.py:add_changesets
     167changegroup = python:/path/to/hooks.py:add_changesets
     168
     169[trac]
     170env = /path/to/env
     171trac-admin = /path/to/trac-admin
     172}}}
     173
     174=== Per-request synchronization #PerRequestSync
     175If 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.
     176
     177Note that in this case, the changeset listener extension point is not called, and therefore plugins using it will not work correctly.
     178
     179
     180== Automatic changeset references in tickets
     181
     182You can automatically add a reference to the changeset as a ticket comment whenever changes are committed to the repository. The description of the commit needs to contain one of the following formulas:
     183 * '''`Refs #123`''' - to reference this changeset in `#123` ticket
     184 * '''`Fixes #123`''' - to reference this changeset and close `#123` ticket with the default status ''fixed''
     185
     186This functionality requires installing a post-commit hook as described in [#ExplicitSync], and enabling the optional commit updater components by adding the following line to the `[components]` section of your [wiki:TracIni#components-section trac.ini], or enabling the components in the //Plugins// admin panel.
     187{{{#!ini
     188tracopt.ticket.commit_updater.* = enabled
     189}}}
     190For more information, see the documentation of the `CommitTicketUpdater` component in the //Plugins// admin panel and the [trac:CommitTicketUpdater] page.
     191
     192== Migration from a single-repository setup (Subversion) #Migration
     193The following procedure illustrates a typical migration from a Subversion single-repository setup to multiple repositories.
     194
     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. Re-synchronize the main repository.
     198 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.
     199 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.
     200 1. Repeat steps 2, 3 and 4 to add other "named" repositories as needed.
     201
     202== Migration from a single-repository setup (Mercurial) #MigrationMercurial
     203The 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.
     204
     205 1. Upgrade to the latest version of the [trac:TracMercurial] plugin.
     206 1. Remove the default repository specification from the `[trac] repository_dir` option.
     207 1. Add the main repository as a named repository.
     208 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.
     209 1. Repeat step 3 to add other "named" repositories as needed.
     210
     211== Troubleshooting
     212
     213=== My trac-post-commit-hook doesn't work anymore #trac-post-commit-hook
     214
     215You 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.