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Re: Plugin dependency checking

by Burt Adsit-3 :: Rate this Message:

I have a similar issue with one of my plugins. I have classes in my
plugin that extend native buddypress classes. There were some issues
early on where the user loaded the plugins out of sequence. So now we
have a standard way of determining if bp is installed and loaded at the
time of dependent plugin load.

function oci_load_buddypress() {
// check to see if bp is already loaded
if ( function_exists( 'bp_core_setup_globals' ) )
return true;

/* Get the list of active sitewide plugins */
$active_sitewide_plugins = maybe_unserialize( get_site_option(
'active_sitewide_plugins' ) );

// not activated
if ( !isset( $active_sidewide_plugins['buddypress/bp-loader.php'] ) )
return false;

// activated but not loaded yet
if ( isset( $active_sidewide_plugins['buddypress/bp-loader.php'] )
&& !function_exists( 'bp_core_setup_globals' ) ) {
require_once( WP_PLUGIN_DIR . '/buddypress/bp-loader.php' );
return true;
}

return false;
}

So the fn returns true if it's ok to continue with dependent plugin load
and false if we need a graceful exit. It doesn't require rearranging the
list of active plugins.

scribu wrote:

> First of all, great to see WP 2.8 finally comming out. In the official blog
> post, dependency checking was mentioned at the end. What I have in mind
> might not be the same thing but it is related, so here goes:
>
> I have a plugin toolkit called
> scbFramework<http://scribu.net/wordpress/scb-framework>,
> which I would like to package as a base plugin.
>
> The solution I found involves two steps:
>
> 1. Get the base plugin to be the first plugin that is loaded, so that the
> classes are available to all the rest of the plugins. This is done
> here<http://plugins.trac.wordpress.org/browser/scb-framework/trunk/plugin.php>
> .
> 2. In each child plugin, check if the base plugin is installed. If not,
> deactivate the child plugin and issue a notice. This is done in
> scb-check.php<http://plugins.trac.wordpress.org/browser/scb-framework/trunk/scb-check.php>
> .
>
> Step two requires ticket #9991
> <http://core.trac.wordpress.org/ticket/9991>to be fixed, so that the
> user doesn't get two notices when he tries to
> activate the child plugin.
>
> Any thoughts on this method? Are there any plans to have an equivalent
> mechanism in WP 2.9?
>
>
>

--
Code Is Freedom
Burt Adsit

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