Feature Proposal: A TWiki variable to check if a plugin is enabled

Motivation

creating topic templates that require specific TWiki plugins. I want to be able to check to see if the required plugin is installed and functioning. if it is not i want to see a missing plugin error.

Description and Documentation

I would like to see a built in variable something like %REQUIRESPLUGIN{ plugin="..." version="..." failure="warn,error" }%

Examples

Impact

Implementation

-- Contributors: JoeGainey - 04 Jun 2008

Discussion

You can already do this see the contexts in IfStatements - though we should add a plugin version 'value' to test against.

TablePlugin is %IF{ "context TablePluginEnabled" then="enabled" else="disabled" }%

-- SvenDowideit - 04 Jun 2008

I saw this, what would be the appropriate way to redirect to an error page if a plugin is not enabled?

-- JoeGainey - 05 Jun 2008