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This is a very large refactoring which aims at making Tutor both more extendable and more generic. Historically, the Tutor plugin system was designed as an ad-hoc solution to allow developers to modify their own Open edX platforms without having to fork Tutor. The plugin API was simple, but limited, because of its ad-hoc nature. As a consequence, there were many things that plugin developers could not do, such as extending different parts of the CLI or adding custom template filters. Here, we refactor the whole codebase to make use of a generic plugin system. This system was inspired by the Wordpress plugin API and the Open edX "hooks and filters" API. The various components are added to a small core thanks to a set of actions and filters. Actions are callback functions that can be triggered at different points of the application lifecycle. Filters are functions that modify some data. Both actions and filters are collectively named as "hooks". Hooks can optionally be created within a certain context, which makes it easier to keep track of which application created which callback. This new hooks system allows us to provide a Python API that developers can use to extend their applications. The API reference is added to the documentation, along with a new plugin development tutorial. The plugin v0 API remains supported for backward compatibility of existing plugins. Done: - Do not load commands from plugins which are not enabled. - Load enabled plugins once on start. - Implement contexts for actions and filters, which allow us to keep track of the source of every hook. - Migrate patches - Migrate commands - Migrate plugin detection - Migrate templates_root - Migrate config - Migrate template environment globals and filters - Migrate hooks to tasks - Generate hook documentation - Generate patch reference documentation - Add the concept of action priority Close #499.
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1.6 KiB
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42 lines
1.6 KiB
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.. _plugins:
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============
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Introduction
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============
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Tutor comes with a plugin system that allows anyone to customise the deployment of an Open edX platform very easily. The vision behind this plugin system is that users should not have to fork the Tutor repository to customise their deployments. For instance, if you have created a new application that integrates with Open edX, you should not have to describe how to manually patch the platform settings, ``urls.py`` or ``*.env.json`` files. Instead, you can create a "tutor-myapp" plugin for Tutor. Then, users will start using your application in three simple steps::
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# 1) Install the plugin
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pip install tutor-myapp
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# 2) Enable the plugin
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tutor plugins enable myapp
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# 3) Reconfigure and restart the platform
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tutor local quickstart
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For simple changes, it may be extremely easy to create a Tutor plugin: even non-technical users may get started with our :ref:`plugin_development_tutorial` tutorial. We also provide a list of :ref:`simple example plugins <plugins_examples>`.
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Plugin commands cheatsheet
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==========================
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List installed plugins::
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tutor plugins list
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Enable/disable a plugin::
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tutor plugins enable myplugin
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tutor plugins disable myplugin
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After enabling or disabling a plugin, the environment should be re-generated with::
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tutor config save
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The full plugins CLI is described in the :ref:`reference documentation <cli_plugins>`.
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.. _existing_plugins:
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Existing plugins
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================
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Officially-supported plugins are listed on the `Overhang.IO <https://overhang.io/tutor/plugins>`__ website.
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