Version 2 (modified by Jeff Hammel, 8 years ago) (diff)


allows components to state dependencies on other plugins

Notice: This plugin is unmaintained and available for adoption.


ComponentDependencyPlugin allows a Component to state a dependency on other plugin, via the IRequireComponents interface:

class IRequireComponents(Interface):
    def requires():
        """list of component classes that this component depends on"""

The Component classes that are returned by the requires method will be enabled upon environment upgrade. This allows very simple dependencies. Of course, for installation, the required components are still required to be part of python (in install_requires in and this plugin will not work if there is trouble loading a plugin that is required.

Bugs/Feature Requests

Existing bugs and feature requests for ComponentDependencyPlugin are here.

If you have any issues, create a new ticket.


Download the zipped source from [download:componentdependencyplugin here].


You can check out ComponentDependencyPlugin from here using Subversion, or browse the source with Trac.


The files in illustrate how to use the plugin. Enable the ComponentDependencyPlugin (componentdependencies.componentdependency.componentdependencyplugin = enabled) and enable the TestDependencyPlugin (componentdependencies.test.testdependencyplugin = enabled). Trac will then require an upgrade. The FooBarTest component will be enabled in the upgrade.

Recent Changes

6314 by k0s on 2009-07-29 20:47:58
initial import of ComponentDependencyPlugin
6313 by k0s on 2009-07-29 20:47:08
remove erroneously created directory
6312 by k0s on 2009-07-29 20:46:42
create the correct directory


Originally developed at The Open Planning Project

Author: k0s