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pelican-theme/docs/plugins.rst
2012-03-20 23:31:04 +01:00

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.. _plugins:
Plugins
#######
Since version 3.0, pelican manages plugins. Plugins are a way to add features
to pelican without having to directly hack pelican code.
Pelican is shipped with a set of core plugins, but you can easily implement
your own (and this page describes how).
How to use plugins?
====================
To load plugins, you have to specify them in your settings file. You have two
ways to do so.
Either by specifying strings with the path to the callables::
PLUGINS = ['pelican.plugins.gravatar',]
Or by importing them and adding them to the list::
from pelican.plugins import gravatar
PLUGINS = [gravatar, ]
If your plugins are not in an importable path, you can specify a `PLUGIN_PATH`
in the settings::
PLUGIN_PATH = "plugins"
PLUGINS = ["list", "of", "plugins"]
How to create plugins?
======================
Plugins are based on the concept of signals. Pelican sends signals and plugins
subscribe to those signals. The list of signals are defined in a following
section.
The only rule to follow for plugins is to define a `register` callable, in
which you map the signals to your plugin logic. Let's take a simple exemple::
from pelican import signals
def test(sender):
print "%s initialized !!" % sender
def register():
signals.initialized.connect(test)
List of signals
===============
Here is the list of currently implemented signals:
========================= ============================ =========================================
Signal Arguments Description
========================= ============================ =========================================
initialized pelican object
article_generate_context article_generator, metadata
article_generator_init article_generator invoked in the ArticlesGenerator.__init__
========================= ============================ =========================================
The list is currently small, don't hesitate to add signals and make a pull
request if you need them!
List of plugins
===============
Not all the list are described here, but a few of them have been extracted from
pelican core and provided in pelican.plugins. They are described here:
Tag cloud
---------
Translation
-----------
Github Activity
---------------
This plugin makes use of the ``feedparser`` library that you'll need to
install.
Set the GITHUB_ACTIVITY_FEED parameter to your github activity feed.
For example, my setting would look like::
GITHUB_ACTIVITY_FEED = 'https://github.com/kpanic.atom'
On the templates side, you just have to iterate over the ``github_activity``
variable, as in the example::
{% if GITHUB_ACTIVITY_FEED %}
<div class="social">
<h2>Github Activity</h2>
<ul>
{% for entry in github_activity %}
<li><b>{{ entry[0] }}</b><br /> {{ entry[1] }}</li>
{% endfor %}
</ul>
</div><!-- /.github_activity -->
{% endif %}
``github_activity`` is a list of lists. The first element is the title
and the second element is the raw html from github.