[4.2] Move demo tasks to service provider

plugins/task/demotasks/demotasks.xml

@@ -9,9 +9,10 @@
 	<authorUrl>www.joomla.org</authorUrl>
 	<version>4.1</version>
 	<description>PLG_TASK_DEMO_TASKS_XML_DESCRIPTION</description>
+	<namespace path="src">Joomla\Plugin\Task\DemoTasks</namespace>
 	<files>
-		<filename plugin="demotasks">demotasks.php</filename>
-		<folder>language</folder>
+		<folder plugin="demotasks">services</folder>
+		<folder>src</folder>
 		<folder>forms</folder>
 	</files>
 	<languages>

plugins/task/demotasks/services/provider.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Task.DemoTasks
+ *
+ * @copyright   (C) 2022 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+defined('_JEXEC') or die;
+
+use Joomla\CMS\Extension\PluginInterface;
+use Joomla\CMS\Factory;
+use Joomla\CMS\Plugin\PluginHelper;
+use Joomla\DI\Container;
+use Joomla\DI\ServiceProviderInterface;
+use Joomla\Event\DispatcherInterface;
+use Joomla\Plugin\Task\DemoTasks\Extension\DemoTasks;
+use Joomla\Plugin\Task\SiteStatus\Extension\SiteStatus;
+use Joomla\Utilities\ArrayHelper;
+
+return new class implements ServiceProviderInterface
+{
+	/**
+	 * Registers the service provider with a DI container.
+	 *
+	 * @param   Container  $container  The DI container.
+	 *
+	 * @return  void
+	 *
+	 * @since   __DEPLOY_VERSION__
+	 */
+	public function register(Container $container)
+	{
+		$container->set(
+			PluginInterface::class,
+			function (Container $container)
+			{
+				$dispatcher = $container->get(DispatcherInterface::class);
+
+				$plugin = new DemoTasks(
+					$dispatcher,
+					(array) PluginHelper::getPlugin('task', 'demotasks')
+				);
+				$plugin->setApplication(Factory::getApplication());
+
+				return $plugin;
+			}
+		);
+	}
+};

plugins/task/demotasks/demotasks.php → plugins/task/demotasks/src/Extension/DemoTasks.php

@@ -7,6 +7,8 @@
  * @license     GNU General Public License version 2 or later; see LICENSE.txt
  */
 
+namespace Joomla\Plugin\Task\DemoTasks\Extension;
+
 // Restrict direct access
 defined('_JEXEC') or die;
 
@@ -23,7 +25,7 @@
  *
  * @since 4.1.0
  */
-class PlgTaskDemotasks extends CMSPlugin implements SubscriberInterface
+final class DemoTasks extends CMSPlugin implements SubscriberInterface
 {
 	use TaskPluginTrait;