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— | tracplugins [2015/06/09 15:23] (current) – created - external edit 127.0.0.1 | ||
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+ | ====== Trac Plugins ====== | ||
+ | [[: | ||
+ | |||
+ | Since version 0.9, Trac supports plugins that extend the built-in functionality. The plugin functionality is based on the [[http:// | ||
+ | |||
+ | ===== Requirements ===== | ||
+ | |||
+ | To use egg based plugins in Trac, you need to have [[http:// | ||
+ | |||
+ | Plugins can also consist of a single `.py` file dropped into either the environment or global `plugins` directory //(since [[: | ||
+ | |||
+ | To install `setuptools`, | ||
+ | < | ||
+ | $ python ez_setup.py | ||
+ | </ | ||
+ | |||
+ | |||
+ | If the `ez_setup.py` script fails to install the setuptools release, you can download it from [[http:// | ||
+ | |||
+ | ===== Installing a Trac Plugin ===== | ||
+ | |||
+ | ==== For a Single Project ==== | ||
+ | |||
+ | Plugins are packaged as [[http:// | ||
+ | < | ||
+ | $ python setup.py bdist_egg | ||
+ | </ | ||
+ | |||
+ | to build the `.egg` file. | ||
+ | |||
+ | Once you have the plugin archive, you need to copy it into the `plugins` directory of the [[: | ||
+ | |||
+ | Note that the Python version that the egg is built with must | ||
+ | match the Python version with which Trac is run. If for | ||
+ | instance you are running Trac under Python 2.3, but have | ||
+ | upgraded your standalone Python to 2.4, the eggs won't be | ||
+ | recognized. | ||
+ | |||
+ | ==== For All Projects ==== | ||
+ | |||
+ | == With an .egg file == | ||
+ | |||
+ | Some plugins (such as [[http:// | ||
+ | < | ||
+ | easy_install TracWebAdmin-0.1.1dev_r2765-py2.3.egg | ||
+ | </ | ||
+ | |||
+ | |||
+ | If `easy_install` is not on your system see the Requirements section above to install it. Windows users will need to add the `Scripts` directory of their Python installation (for example, `C: | ||
+ | |||
+ | If Trac reports permission errors after installing a zipped egg and you would rather not bother providing a egg cache directory writable by the web server, you can get around it by simply unzipping the egg. Just pass `--always-unzip` to `easy_install`: | ||
+ | < | ||
+ | easy_install --always-unzip TracWebAdmin-0.1.1dev_r2765-py2.3.egg | ||
+ | </ | ||
+ | |||
+ | You should end up with a directory having the same name as the zipped egg (complete with `.egg` extension) and containing its uncompressed contents. | ||
+ | |||
+ | Trac also searches for globally installed plugins under `$prefix/ | ||
+ | |||
+ | == From source == | ||
+ | |||
+ | If you downloaded the plugin' | ||
+ | < | ||
+ | $ python setup.py install | ||
+ | </ | ||
+ | |||
+ | |||
+ | == Enabling the plugin == | ||
+ | Unlike plugins installed per-environment, | ||
+ | < | ||
+ | [[: | ||
+ | webadmin.* = enabled | ||
+ | </ | ||
+ | |||
+ | |||
+ | The name of the option is the Python package of the plugin. This should be specified in the documentation of the Plugin, but can also be easily find out by looking at the source (look for a top-level directory that contains a file named `__init__.py`.) | ||
+ | |||
+ | Note: After installing the plugin, you may need to restart Apache. | ||
+ | |||
+ | ===== Setting up the Plugin Cache ===== | ||
+ | |||
+ | Some plugins will need to be extracted by the Python eggs runtime (`pkg_resources`), | ||
+ | |||
+ | To do this from the Apache configuration, | ||
+ | < | ||
+ | SetEnv PYTHON_EGG_CACHE / | ||
+ | </ | ||
+ | |||
+ | |||
+ | This works whether you are using the [[: | ||
+ | |||
+ | For example (for CGI): | ||
+ | < | ||
+ | < | ||
+ | | ||
+ | | ||
+ | </ | ||
+ | </ | ||
+ | |||
+ | |||
+ | or (for mod_python): | ||
+ | < | ||
+ | < | ||
+ | | ||
+ | ... | ||
+ | | ||
+ | </ | ||
+ | </ | ||
+ | |||
+ | |||
+ | // | ||
+ | |||
+ | For [[: | ||
+ | |||
+ | ==== About hook scripts ==== | ||
+ | |||
+ | If you have set up some subversion hook scripts that call the Trac engine - such as the post-commit hook script provided in the `/contrib` directory - make sure you define the `PYTHON_EGG_CACHE` environment variable within these scripts as well. | ||
+ | |||
+ | ===== Troubleshooting ===== | ||
+ | |||
+ | ==== Is setuptools properly installed? ==== | ||
+ | |||
+ | Try this from the command line: | ||
+ | < | ||
+ | $ python -c " | ||
+ | </ | ||
+ | |||
+ | |||
+ | If you get **no output**, setuptools **is** installed. Otherwise, you'll need to install it before plugins will work in Trac. | ||
+ | |||
+ | ==== Did you get the correct version of the Python egg? ==== | ||
+ | |||
+ | Python eggs have the Python version encoded in their filename. For example, `MyPlugin-1.0-py2.4.egg` is an egg for Python 2.4, and will **not** be loaded if you're running a different Python version (such as 2.3 or 2.5). | ||
+ | |||
+ | Also, verify that the egg file you downloaded is indeed a ZIP archive. If you downloaded it from a Trac site, chances are you downloaded the HTML preview page instead. | ||
+ | |||
+ | ==== Is the plugin enabled? ==== | ||
+ | |||
+ | If you install a plugin globally (i.e. //not// inside the `plugins` directory of the Trac project environment) you will have to explicitly enable it in [[: | ||
+ | * you actually added the necessary line(s) to the `[[: | ||
+ | * the package/ | ||
+ | * if you're reference a module (as opposed to a class), you've appended the necessary “.*” | ||
+ | * the value is “enabled", | ||
+ | |||
+ | ==== Check the permissions on the egg file ==== | ||
+ | |||
+ | Trac must of course be able to read the file. Yeah, you knew that ;-) | ||
+ | |||
+ | ==== Check the log files ==== | ||
+ | |||
+ | Enable [[: | ||
+ | |||
+ | ---- | ||
+ | See also TracGuide, [[http:// | ||
tracplugins.txt · Last modified: 2015/06/09 15:23 by 127.0.0.1