[Python-Dev] PEP 376 proposed changes for basic plugins support (original) (raw)

M.-A. Lemburg mal at egenix.com
Tue Aug 3 10:00:44 CEST 2010

Éric Araujo wrote:

What you might want to do is add new type fields to PEP 345, making it easier to identify and list packages that work as plugins for applications, e.g.

Type: Plugin for MyCoolApp The MyCoolApp could then use the Type-field to identify all installed plugins, get their installation directories, etc. and work on from there. Classifiers seem a good way to do that. They’re already defined in accepted PEPs, extensible on demand, used by Web frameworks components/applications/middlewares/things and other projects, and queriable in PyPI. We could use “Environment :: Plugins” and “Framework :: Something” or define a new classifier (not all applications are frameworks, and “plugins” seems a very strange value for “environment”).

This would work to mark plugins as such, but we'd still would have to have a field to name the app they belong to and I don't think that the process of adding new classifiers is flexible enough to handle those names.

A Type field would be under application control and allow easy discovery of installed plugins for a specific app.

It would be the first time that a classifier triggers specific processing from distutils though, so we may prefer to define a new Provides-Plugin field for consistency and explicitness.

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