[drupal-devel] [feature] Enable override and extension of core module functions

nedjo drupal-devel at drupal.org
Mon Aug 22 22:56:04 UTC 2005

Issue status update for 
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 Project:      Drupal
 Version:      cvs
 Component:    module system
 Category:     feature requests
 Priority:     normal
 Assigned to:  Anonymous
 Reported by:  nedjo
 Updated by:   nedjo
 Status:       patch (code needs review)
 Attachment:   http://drupal.org/files/issues/module-extension-and-override.patch (1.38 KB)

A frequently requested functionality is the ability to override or
extend core module functions.

This small patch is an initial take on how to enable function extension
and overriding.  It takes the existing module_invoke() function and adds
tests for override and extension functions, in the forms
modulename_originalfunction_override() and
modulename_originalfunction_extension().  So, for example, an override
function for the core taxonomy_node_form() function as defined by a
module named testmodule would be called
testmodule_taxonomy_node_form_override(), and would be run instead of
taxonomy_node_form().  And testmodule_taxonomy_node_form_extension()
would be run every time taxonomy_node_form() was called, hence
"extending" it.

Of course, this approach would only be useful if we converted most - or
all! - of our current module function calls to use module_invoke()...


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