[4.0] Plugin as services

[laoneo]

Summary of Changes

Loads the plugins through the boot functionality similar to what we have for modules and components.

A plugin needs then a file services/provider.php which does register the PluginInterface::class resource in the container:

public function register(Container $container)
{
	$container->set(
		PluginInterface::class,
		function (Container $container)
		{
			// @Todo This needs to be changed to a proper factory
			$plugin = \Joomla\CMS\Plugin\PluginHelper::getPlugin('content', 'myplugin');

			return new MyPlugin(
				$container->get(DispatcherInterface::class),
				(array)$plugin
			);
		}
	);
}

More information can be found in #19834, #20217 and #19667.

This is on hold till #19834 got merged as it is based on it.

Testing Instructions

• Log in on the back end.
• Open back end admin panel end.

Expected result

The joomla update check will be executed.

Actual result

All is working fine.

Documentation Changes Required

Needs to be documented like the component service locator stuff.

[wilsonge]

I honestly still don't really agree with this for the reasons mentioned earlier. But as per our discussion on glip earlier merged.