Changes between Initial Version and Version 1 of TracRepositoryAdmin


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Timestamp:
2017-08-28T06:33:43Z (3 months ago)
Author:
trac
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  • TracRepositoryAdmin

    v1 v1  
     1= Repository Administration
     2[[PageOutline(2-3)]]
     3
     4== Quick start #QuickStart
     5
     6 * Enable the repository connector(s) for the version control system(s) that you will use.
     7 * Add repositories through the //Repositories// admin panel, with `trac-admin` or in the `[repositories]` section of [wiki:TracIni#repositories-section trac.ini].
     8 * 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.
     9 * Make sure the user under which your hooks are run has write access to the Trac environment, or use a tool like `sudo` to temporarily elevate privileges.
     10
     11== Enabling the components
     12
     13Support for version control systems is provided by optional components distributed with Trac, which are disabled by default //(since 1.0)//. Subversion and Git must be explicitly enabled if you wish to use them.
     14
     15The version control systems can be enabled by adding the following to the `[components]` section of your [TracIni#components-section trac.ini], or enabling the components in the //Plugins// admin panel.
     16
     17{{{#!ini
     18tracopt.versioncontrol.svn.* = enabled
     19}}}
     20
     21{{{#!ini
     22tracopt.versioncontrol.git.* = enabled
     23}}}
     24
     25== Specifying repositories #Repositories
     26Trac supports multiple repositories per environment, and the repositories may be for different version control system types. Each repository must be defined in a repository configuration provider, the two supported by default are the [#ReposDatabase database store] and the [#ReposTracIni trac.ini configuration file]. A repository should not be defined in multiple configuration providers.
     27
     28It is possible to define aliases of repositories, that act as "pointers" to real repositories. This can be useful when renaming a repository, to avoid breaking links to the old name.
     29
     30A number of attributes can be associated with each repository. The attributes define the repository's location, type, name and how it is displayed in the source browser. The following attributes are supported:
     31
     32||='''Attribute''' =||='''Description''' =||
     33||`alias` ||\
     34||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. ||
     35||`description` ||\
     36||The text specified in the `description` attribute is displayed below the top-level entry for the repository in the source browser. It supports WikiFormatting. ||
     37||`dir` ||\
     38||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. ||
     39||`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. ||
     40||`sync_per_request`||When set to `true` the repository will be synced on every request. This is not recommended, instead a post-commit hook should be configured to provide [#ExplicitSync explicit synchronization] and `sync_per_request` should be set to `false`.||
     41||`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. ||
     42||`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. ||
     43
     44A repository `name` and one of `alias` or `dir` attributes are mandatory. All others are optional.
     45
     46For some version control systems, it is possible to specify not only the path to the repository in the `dir` attribute, but also a ''scope'' within the repository. Trac will then only show information related to the files and changesets below that scope. The Subversion backend for Trac supports this. For other types, check the corresponding plugin's documentation.
     47
     48After adding a repository, the cache for that repository must be re-synchronized once with the `trac-admin $ENV repository resync` command.
     49
     50 `repository resync <repos>`::
     51   Re-synchronize Trac with a repository.
     52
     53
     54=== In `trac.ini` #ReposTracIni
     55Repositories 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.
     56
     57The 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.
     58
     59The 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.
     60{{{#!ini
     61[repositories]
     62project.dir = /var/repos/project
     63project.description = This is the ''main'' project repository.
     64project.type = svn
     65project.url = http://example.com/svn/project
     66project.hidden = true
     67
     68lib.dir = /var/repos/lib
     69lib.description = This is the secondary library code.
     70lib.type = svn
     71lib.url = http://example.com/svn/lib
     72
     73.alias = project
     74}}}
     75Note that `name.alias = target` makes `name` an alias for the `target` repo, not the other way around.
     76
     77=== In the database #ReposDatabase
     78Repositories can also be specified in the database, using either the "Repositories" admin panel under "Version Control", or the `trac-admin $ENV repository` commands.
     79
     80The 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.
     81
     82The following [wiki:TracAdmin trac-admin] commands can be used to perform repository operations from the command line.
     83
     84 `repository add <repos> <dir> [type]`::
     85   Add a repository `<repos>` located at `<dir>`, and optionally specify its type.
     86
     87 `repository alias <name> <target>`::
     88   Create an alias `<name>` for the repository `<target>`.
     89
     90 `repository remove <repos>`::
     91   Remove the repository `<repos>`.
     92
     93 `repository set <repos> <key> <value>`::
     94   Set the attribute `<key>` to `<value>` for the repository `<repos>`.
     95
     96Note 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.
     97
     98== Repository caching
     99
     100The Subversion and Git repository connectors support caching, which improves the performance browsing the repository, viewing logs and viewing changesets. Cached repositories must be [#Synchronization synchronized]; either explicit or implicit synchronization can be used. When searching changesets, only cached repositories are searched.
     101
     102Subversion repositories are cached unless the type is `direct-svnfs`. Git repositories are cached when `[git]` [wiki:TracIni#git-section cached_repository] is `true`.
     103
     104== Repository synchronization #Synchronization
     105Prior 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.
     106
     107There 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.
     108
     109=== Mercurial Repositories
     110Please note that at the time of writing, no initial resynchronization or any hooks are necessary for Mercurial repositories - see [trac:#9485] for more information.
     111
     112=== Explicit synchronization #ExplicitSync
     113This is the preferred method of repository synchronization. It requires setting the `sync_per_request` attribute to `false`, 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.
     114
     115 `changeset added <repos> <rev> [...]`::
     116   Notify Trac that one or more changesets have been added to a repository.
     117
     118 `changeset modified <repos> <rev> [...]`::
     119   Notify Trac that metadata on one or more changesets in a repository has been modified.
     120
     121The `<repos>` argument can be either a repository name (use "`(default)`" for the default repository) or the path to the repository.
     122
     123Note 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.
     124
     125==== Subversion
     126
     127===== Using `trac-svn-hook`
     128
     129In a Unix environment, the simplest way to configure explicit synchronization is by using the [trac:source:trunk/contrib/trac-svn-hook contrib/trac-svn-hook] script. `trac-svn-hook` starts `trac-admin` asynchronously to avoid slowing the commit and log editing operations. The script comes with a number of safety checks and usage advice. Output is written to a log file with prefix `svn-hooks-` in the environment `log` directory, which can make configuration issues easier to debug.
     130
     131There's no equivalent `trac-svn-hook.bat` for Windows yet, but the script can be run by Cygwin's bash.
     132
     133Follow the help in the documentation header of the script to configure `trac-svn-hook`. Configuring the hook environment variables is made easier in Subversion 1.8 by using the [http://svnbook.red-bean.com/en/1.8/svn.reposadmin.create.html#svn.reposadmin.hooks.configuration hook script environment] configuration. Rather than directly editing `trac-svn-hook` to set the environment variables, they can be configured through the repository `conf/hooks-env` file. Replace the [trac:source:trunk/contrib/trac-svn-hook@:65-67#L61 configuration section] with:
     134{{{#!bash
     135export PATH=$PYTHON_BIN:$PATH
     136export LD_LIBRARY_PATH=$PYTHON_LIB:$LD_LIBRARY_PATH
     137}}}
     138and set the variables `TRAC_ENV`, `PYTHON_BIN` and `PYTHON_LIB` in the `hooks-env` file. Here is an example, using a Python virtual environment at `/usr/local/venv`:
     139{{{#!ini
     140[default]
     141TRAC_ENV=/var/trac/project-1
     142PYTHON_BIN=/usr/local/venv/bin
     143PYTHON_LIB=/usr/local/venv/lib
     144}}}
     145
     146===== Writing Your Own Hook Script
     147
     148The 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`):
     149{{{#!sh
     150#!/bin/sh
     151export PYTHON_EGG_CACHE="/path/to/dir"
     152/usr/bin/trac-admin /path/to/env changeset added "$1" "$2"
     153}}}
     154Note: Check with `whereis trac-admin`, whether `trac-admin` is really installed under `/usr/bin/` or maybe under `/usr/local/bin/` and adapt the path.
     155On Windows (`post-commit.cmd`):
     156{{{#!bat
     157@C:\Python26\Scripts\trac-admin.exe C:\path\to\env changeset added "%1" "%2"
     158}}}
     159
     160The post-revprop-change hook for Subversion is very similar. On Unix (`post-revprop-change`):
     161{{{#!sh
     162#!/bin/sh
     163export PYTHON_EGG_CACHE="/path/to/dir"
     164/usr/bin/trac-admin /path/to/env changeset modified "$1" "$2"
     165}}}
     166On Windows (`post-revprop-change.cmd`):
     167{{{#!bat
     168@C:\Python26\Scripts\trac-admin.exe C:\path\to\env changeset modified "%1" "%2"
     169}}}
     170
     171The Unix variants above assume that the user running the Subversion commit has write access to the Trac environment, which is the case in the standard configuration where both the repository and Trac are served by the web server. If you access the repository through another means, for example `svn+ssh://`, you may have to run `trac-admin` with different privileges, for example by using `sudo`.
     172
     173See the [http://svnbook.red-bean.com/en/1.7/svn.reposadmin.create.html#svn.reposadmin.create.hooks section about hooks] in the Subversion book for more information. Other repository types will require different hook setups.
     174
     175==== Git
     176
     177Git hooks can be used in the same way for explicit syncing of Git repositories.  If your git repository is one that gets committed to directly on the machine that hosts trac, add the following to the `hooks/post-commit` file in your git repo (note: this will do nothing if you only update the repo by pushing to it):
     178{{{#!sh
     179#!/bin/sh
     180REV=$(git rev-parse HEAD)
     181trac-admin /path/to/env changeset added <repos> $REV
     182}}}
     183
     184Alternately, if your repository is one that only gets pushed to, add the following to the `hooks/post-receive` file in the repo:
     185{{{#!sh
     186#!/bin/sh
     187tracenv=/path/to/env     # change with your Trac environment's path
     188repos=                   # change with your repository's name
     189while read oldrev newrev refname; do
     190    if [ "$oldrev" = 0000000000000000000000000000000000000000 ]; then
     191        git rev-list --reverse "$newrev" --
     192    else
     193        git rev-list --reverse "$newrev" "^$oldrev" --
     194    fi | xargs trac-admin "$tracenv" changeset added "$repos"
     195done
     196}}}
     197
     198The `<repos>` argument can be either a repository name (use "`(default)`" for the default repository) or the path to the repository.
     199
     200==== Mercurial
     201
     202For 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):
     203{{{#!ini
     204[hooks]
     205; If mercurial-plugin is installed globally
     206commit = python:tracext.hg.hooks.add_changesets
     207changegroup = python:tracext.hg.hooks.add_changesets
     208
     209; If mercurial-plugin is installed in a Trac plugins directory
     210commit = python:/path/to/hooks.py:add_changesets
     211changegroup = python:/path/to/hooks.py:add_changesets
     212
     213[trac]
     214env = /path/to/env
     215trac-admin = /path/to/trac-admin
     216}}}
     217
     218=== Per-request synchronization #PerRequestSync
     219If the post-commit hooks are not available, the environment can be set up for per-request synchronization. In that case, the `sync_per_request` attribute for each repository in the database and in [wiki:TracIni#trac-section trac.ini] must be set to `false`.
     220
     221Note that in this case, the changeset listener extension point is not called, and therefore plugins using it will not work correctly.
     222
     223== Automatic changeset references in tickets
     224
     225You 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:
     226 * '''`Refs #123`''' - to reference this changeset in `#123` ticket
     227 * '''`Fixes #123`''' - to reference this changeset and close `#123` ticket with the default status ''fixed''
     228
     229This 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.
     230{{{#!ini
     231tracopt.ticket.commit_updater.* = enabled
     232}}}
     233For more information, see the documentation of the `CommitTicketUpdater` component in the //Plugins// admin panel and the [trac:CommitTicketUpdater] page.
     234
     235== Troubleshooting
     236
     237=== My trac-post-commit-hook doesn't work anymore #trac-post-commit-hook
     238
     239You 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.
     240
     241See [trac:CommitTicketUpdater#Troubleshooting] for more troubleshooting tips.