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author | Aditi <aditi.iitr@gmail.com> | 2013-06-21 23:09:22 +0530 |
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committer | Aditi <aditi.iitr@gmail.com> | 2013-06-21 23:09:22 +0530 |
commit | 2719d546a57c2332e36cc056ac80ec5d79672c1a (patch) | |
tree | 1f62ab8f761026d4faa5442032df133fc90d47f2 /docs/source/pluginwriter/quickstart.rst | |
parent | 1a6f065419290b3f4234ce4a89bb2c46b13e8a12 (diff) | |
parent | 92b22e7deac547835f69168f97012b52e87b6de4 (diff) | |
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diff --git a/docs/source/pluginwriter/quickstart.rst b/docs/source/pluginwriter/quickstart.rst new file mode 100644 index 00000000..6d45ea36 --- /dev/null +++ b/docs/source/pluginwriter/quickstart.rst @@ -0,0 +1,188 @@ +.. MediaGoblin Documentation + + Written in 2011, 2012 by MediaGoblin contributors + + To the extent possible under law, the author(s) have dedicated all + copyright and related and neighboring rights to this software to + the public domain worldwide. This software is distributed without + any warranty. + + You should have received a copy of the CC0 Public Domain + Dedication along with this software. If not, see + <http://creativecommons.org/publicdomain/zero/1.0/>. + + +=========== +Quick Start +=========== + +This is a quick start. It's not comprehensive, but it walks through +writing a basic plugin called "sampleplugin" which logs "I've been +started!" when ``setup_plugin()`` has been called. + +.. todo: Rewrite this to be a useful plugin + + +Step 1: Files and directories +============================= + +GNU MediaGoblin plugins are Python projects at heart. As such, you should +use a standard Python project directory tree:: + + sampleplugin/ + |- README + |- LICENSE + |- setup.py + |- sampleplugin/ + |- __init__.py + + +The outer ``sampleplugin`` directory holds all the project files. + +The ``README`` should cover what your plugin does, how to install it, +how to configure it, and all the sorts of things a README should +cover. + +The ``LICENSE`` should have the license under which you're +distributing your plugin. + +The inner ``sampleplugin`` directory is the Python package that holds +your plugin's code. + +The ``__init__.py`` denotes that this is a Python package. It also +holds the plugin code and the ``hooks`` dict that specifies which +hooks the sampleplugin uses. + + +Step 2: README +============== + +Here's a rough ``README``. Generally, you want more information +because this is the file that most people open when they want to learn +more about your project. + +:: + + README + ====== + + This is a sample plugin. It logs a line when ``setup__plugin()`` is + run. + + +Step 3: LICENSE +=============== + +GNU MediaGoblin plugins must be licensed under the AGPLv3 or later. So +the LICENSE file should be the AGPLv3 text which you can find at +`<http://www.gnu.org/licenses/agpl-3.0.html>`_ + + +Step 4: setup.py +================ + +This file is used for packaging and distributing your plugin. + +We'll use a basic one:: + + from setuptools import setup, find_packages + + setup( + name='sampleplugin', + version='1.0', + packages=find_packages(), + include_package_data=True, + install_requires=[], + license='AGPLv3', + ) + + +See `<http://docs.python.org/distutils/index.html#distutils-index>`_ +for more details. + + +Step 5: the code +================ + +The code for ``__init__.py`` looks like this: + +.. code-block:: python + :linenos: + :emphasize-lines: 12,23 + + import logging + from mediagoblin.tools.pluginapi import Plugin, get_config + + + # This creates a logger that you can use to log information to + # the console or a log file. + _log = logging.getLogger(__name__) + + + # This is the function that gets called when the setup + # hook fires. + def setup_plugin(): + _log.info("I've been started!") + config = get_config('sampleplugin') + if config: + _log.info('%r' % config) + else: + _log.info('There is no configuration set.') + + + # This is a dict that specifies which hooks this plugin uses. + # This one only uses one hook: setup. + hooks = { + 'setup': setup_plugin + } + + +Line 12 defines the ``setup_plugin`` function. + +Line 23 defines ``hooks``. When MediaGoblin loads this file, it sees +``hooks`` and registers all the callables with their respective hooks. + + +Step 6: Installation and configuration +====================================== + +To install the plugin for development, you need to make sure it's +available to the Python interpreter that's running MediaGoblin. + +There are a couple of ways to do this, but we're going to pick the +easy one. + +Use ``python`` from your MediaGoblin virtual environment and do:: + + python setup.py develop + +Any changes you make to your plugin will be available in your +MediaGoblin virtual environment. + +Then adjust your ``mediagoblin.ini`` file to load the plugin:: + + [plugins] + + [[sampleplugin]] + + +Step 7: That's it! +================== + +When you launch MediaGoblin, it'll load the plugin and you'll see +evidence of that in the log file. + +That's it for the quick start! + + +Where to go from here +===================== + +See the documentation on the :ref:`plugin-api-chapter` for code +samples and other things you can use when building your plugin. If +your plugin needs its own database models, see +:ref:`plugin-database-chapter`. + +See `Hitchhiker's Guide to Packaging +<http://guide.python-distribute.org/>`_ for more information on +packaging your plugin. |