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Changes between Version 1 and Version 2 of Trac Repository Admin

Timestamp:: Jun 21, 2015, 12:16:11 PM (9 years ago)
Author:: trac
Comment:: --

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Trac Repository Admin

-              v1
+              v2
  * 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.
  * Set the `[trac] repository_sync_per_request` option to an empty value to disable per-request syncing.
+ * 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.
 == Specifying repositories == #Repositories
 …
 ||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. ||
 ||`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. ||
+||`name` ||The `name` attribute specifies the leading path element to the repository. ||
+||`type` ||The `type` attribute sets the type of version control system used by the repository. Trac supports Subversion 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. ||
+||`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. ||
 ||`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. ||
 The `name` attribute and one of `alias` or `dir` are mandatory. All others are optional.
+A repository `name` and one of `alias` or `dir` attributes are mandatory. All others are optional.
 After adding a repository, the cache for that repository must be re-synchronized once with the `trac-admin $ENV repository resync` command.
 …
 The 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.
 The following example defines two Subversion repositories named `project` and `lib`, and a hidden 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.
+The 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.
 {{{
 #!ini
 …
 project.type = svn
 project.url = http://example.com/svn/project
+project.hidden = true
 lib.dir = /var/repos/lib
 lib.description = This is the secondary library code.
 lib.type = svn
 lib.url = http://example.com/svn/lib
 .alias = project
-.hidden = true
 }}}
 Note that `name.alias = target` makes `name` an alias for the `target` repo, not the other way around.
 …
 There 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.
+=== Mercurial Repositories ===
+Please note that at the time of writing, no initial resynchronization or any hooks are necessary for Mercurial repositories - see [trac:#9485] for more information.
 === Explicit synchronization === #ExplicitSync
 This 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.
+This 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.
  `changeset added <repos> <rev> [...]`::
 …
 The `<repos>` argument can be either a repository name (use "`(default)`" for the default repository) or the path to the repository.
+Note 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.
+==== Subversion ====
 The 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`):
+{{{
+#!sh
+{{{#!sh
 #!/bin/sh
+export PYTHON_EGG_CACHE="/path/to/dir"
 /usr/bin/trac-admin /path/to/env changeset added "$1" "$2"
 }}}
+Note: Check with `whereis trac-admin`, whether `trac-admin` is really installed under `/usr/bin/` or maybe under `/usr/local/bin/` and adapt the path.
 On Windows (`post-commit.cmd`):
+{{{
+#!application/x-dos-batch
+{{{#!bat
 @C:\Python26\Scripts\trac-admin.exe C:\path\to\env changeset added "%1" "%2"
 }}}
 The post-revprop-change hook for Subversion is very similar. On Unix (`post-revprop-change`):
+{{{
+#!sh
+{{{#!sh
 #!/bin/sh
+export PYTHON_EGG_CACHE="/path/to/dir"
 /usr/bin/trac-admin /path/to/env changeset modified "$1" "$2"
 }}}
 On Windows (`post-revprop-change.cmd`):
+{{{
+#!application/x-dos-batch
+{{{#!bat
 @C:\Python26\Scripts\trac-admin.exe C:\path\to\env changeset modified "%1" "%2"
 }}}
+The Unix variants above assume that the user running the Subversion commit has write access to the Trac environment, which is the case in the standard configuration where both the repository and Trac are served by the web server. If you access the repository through another means, for example `svn+ssh://`, you may have to run `trac-admin` with different privileges, for example by using `sudo`.
 Note that calling `trac-admin` in your Subversion hooks can slow down the commit and log editing operations on the client side. You might want to use the [trac:source:trunk/contrib/trac-svn-hook contrib/trac-svn-hook] script which starts `trac-admin` in an asynchronous way. The script also comes with a number of safety checks and usage advices which should make it easier to set up and test your hooks. There's no equivalent `trac-svn-hook.bat` for Windows yet, but the script can be run by Cygwin's bash.
+See the [http://svnbook.red-bean.com/en/1.5/svn.reposadmin.create.html#svn.reposadmin.create.hooks section about hooks] in the Subversion book for more information. Other repository types will require different hook setups. Please see the plugin documentation for specific instructions.
+See the [http://svnbook.red-bean.com/en/1.5/svn.reposadmin.create.html#svn.reposadmin.create.hooks section about hooks] in the Subversion book for more information. Other repository types will require different hook setups.
+==== Git ====
+Git hooks can be used in the same way for explicit syncing of Git repositories.  If your git repository is one that gets committed to directly on the machine that hosts trac, add the following to the `hooks/post-receive` file in your git repo (note: this will do nothing if you only update the repo by pushing to it):
+{{{#!sh
+#!/bin/sh
+REV=$(git rev-parse HEAD)
+trac-admin /path/to/env changeset added <repos> $REV
+}}}
+Alternately, if your repository is one that only gets pushed to, add the following to the `hooks/post-receive` file in the repo:
+{{{#!sh
+#!/bin/sh
+while read oldrev newrev refname; do
+        git rev-list --reverse $newrev ^$oldrev  | \
+        while read rev; do
+                trac-admin /path/to/env changeset added <repos> $rev
+        done
+done
+}}}
+The `<repos>` argument can be either a repository name (use "`(default)`" for the default repository) or the path to the repository.
+==== Mercurial ====
+For 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):
+{{{#!ini
+[hooks]
+; If mercurial-plugin is installed globally
+commit = python:tracext.hg.hooks.add_changesets
+changegroup = python:tracext.hg.hooks.add_changesets
+; If mercurial-plugin is installed in a Trac plugins directory
+commit = python:/path/to/hooks.py:add_changesets
+changegroup = python:/path/to/hooks.py:add_changesets
+[trac]
+env = /path/to/env
+trac-admin = /path/to/trac-admin
+}}}
 === Per-request synchronization === #PerRequestSync
 …
 == Migration from a single-repository setup == #Migration
 The following procedure illustrates a typical migration from a single-repository setup to multiple repositories.
+== Migration from a single-repository setup (Subversion) == #Migration
+The following procedure illustrates a typical migration from a Subversion single-repository setup to multiple repositories.
 . Remove the default repository specification from the `[trac] repository_dir` option.
 . Add the "main" repository as a named repository.
+. Add the main repository as a named repository.
 . Re-synchronize the main repository.
+. Set up post-commit and post-revprop-change hooks on the main repository, and set `[trac] repository_sync_per_request` to an empty value.
+. Add a hidden alias to the main repository as the default repository. This ensures that all links predating the migration still resolve to the main repository.
+. Repeat steps 2, 3 and 4 to add other (named) repositories as needed.
+. Set up post-commit and post-revprop-change hooks on the "main" repository, and set `[trac] repository_sync_per_request` to an empty value.
+. 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.
+. Repeat steps 2, 3 and 4 to add other "named" repositories as needed.
+== Migration from a single-repository setup (Mercurial) == #MigrationMercurial
+The 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.
+. Upgrade to the latest version of the TracMercurial plugin.
+. Remove the default repository specification from the `[trac] repository_dir` option.
+. Add the main repository as a named repository.
+. 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.
+. Repeat step 3 to add other "named" repositories as needed.
 == Troubleshooting ==