[4.4] Add Joomla 5 compat plugin to 4.4.0 to fix class "JPlugin" not found error on update to 5

[jgerman-bot]

New language relevant PR in upstream repo: joomla/joomla-cms#41738 Here are the upstream changes:

Click to expand the diff!

diff --git a/administrator/components/com_admin/sql/updates/mysql/4.4.0-2023-09-13.sql b/administrator/components/com_admin/sql/updates/mysql/4.4.0-2023-09-13.sql
new file mode 100644
index 0000000000000..5d50eea48ef18
--- /dev/null
+++ b/administrator/components/com_admin/sql/updates/mysql/4.4.0-2023-09-13.sql
@@ -0,0 +1,2 @@
+INSERT INTO `#__extensions` (`package_id`, `name`, `type`, `element`, `folder`, `client_id`, `enabled`, `access`, `protected`, `locked`, `manifest_cache`, `params`, `custom_data`, `ordering`, `state`) VALUES
+(0, 'plg_behaviour_compat', 'plugin', 'compat', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', -1, 0);
diff --git a/administrator/components/com_admin/sql/updates/postgresql/4.4.0-2023-09-13.sql b/administrator/components/com_admin/sql/updates/postgresql/4.4.0-2023-09-13.sql
new file mode 100644
index 0000000000000..775af7b681f31
--- /dev/null
+++ b/administrator/components/com_admin/sql/updates/postgresql/4.4.0-2023-09-13.sql
@@ -0,0 +1,2 @@
+INSERT INTO "#__extensions" ("package_id", "name", "type", "element", "folder", "client_id", "enabled", "access", "protected", "locked", "manifest_cache", "params", "custom_data", "ordering", "state") VALUES
+(0, 'plg_behaviour_compat', 'plugin', 'compat', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', -1, 0);
diff --git a/administrator/language/en-GB/plg_behaviour_compat.ini b/administrator/language/en-GB/plg_behaviour_compat.ini
new file mode 100644
index 0000000000000..747bdd32d5087
--- /dev/null
+++ b/administrator/language/en-GB/plg_behaviour_compat.ini
@@ -0,0 +1,7 @@
+; Joomla! Project
+; (C) 2023 Open Source Matters, Inc. <https://www.joomla.org>
+; License GNU General Public License version 2 or later; see LICENSE.txt
+; Note : All ini files need to be saved as UTF-8
+
+PLG_BEHAVIOUR_COMPAT="Behaviour - Backward Compatibility"
+PLG_COMPAT_XML_DESCRIPTION="This plugin should be enabled before updating to Joomla 5."
diff --git a/administrator/language/en-GB/plg_behaviour_compat.sys.ini b/administrator/language/en-GB/plg_behaviour_compat.sys.ini
new file mode 100644
index 0000000000000..747bdd32d5087
--- /dev/null
+++ b/administrator/language/en-GB/plg_behaviour_compat.sys.ini
@@ -0,0 +1,7 @@
+; Joomla! Project
+; (C) 2023 Open Source Matters, Inc. <https://www.joomla.org>
+; License GNU General Public License version 2 or later; see LICENSE.txt
+; Note : All ini files need to be saved as UTF-8
+
+PLG_BEHAVIOUR_COMPAT="Behaviour - Backward Compatibility"
+PLG_COMPAT_XML_DESCRIPTION="This plugin should be enabled before updating to Joomla 5."
diff --git a/installation/sql/mysql/base.sql b/installation/sql/mysql/base.sql
index 1274f65019df8..edc4f6bcd967a 100644
--- a/installation/sql/mysql/base.sql
+++ b/installation/sql/mysql/base.sql
@@ -258,8 +258,9 @@ INSERT INTO `#__extensions` (`package_id`, `name`, `type`, `element`, `folder`,
 (0, 'plg_authentication_cookie', 'plugin', 'cookie', 'authentication', 0, 1, 1, 0, 1, '', '', '', 1, 0),
 (0, 'plg_authentication_joomla', 'plugin', 'joomla', 'authentication', 0, 1, 1, 1, 1, '', '', '', 2, 0),
 (0, 'plg_authentication_ldap', 'plugin', 'ldap', 'authentication', 0, 0, 1, 0, 1, '', '{"host":"","port":"389","use_ldapV3":"0","negotiate_tls":"0","no_referrals":"0","auth_method":"bind","base_dn":"","search_string":"","users_dn":"","username":"admin","password":"bobby7","ldap_fullname":"fullName","ldap_email":"mail","ldap_uid":"uid"}', '', 3, 0),
-(0, 'plg_behaviour_taggable', 'plugin', 'taggable', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', 1, 0),
-(0, 'plg_behaviour_versionable', 'plugin', 'versionable', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', 2, 0),
+(0, 'plg_behaviour_compat', 'plugin', 'compat', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', 1, 0),
+(0, 'plg_behaviour_taggable', 'plugin', 'taggable', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', 2, 0),
+(0, 'plg_behaviour_versionable', 'plugin', 'versionable', 'behaviour', 0, 1, 1, 1, 1, '', '{}', '', 3, 0),
 (0, 'plg_captcha_recaptcha', 'plugin', 'recaptcha', 'captcha', 0, 0, 1, 0, 1, '', '{"public_key":"","private_key":"","theme":"clean"}', '', 1, 0),
 (0, 'plg_captcha_recaptcha_invisible', 'plugin', 'recaptcha_invisible', 'captcha', 0, 0, 1, 0, 1, '', '{"public_key":"","private_key":"","theme":"clean"}', '', 2, 0),
 (0, 'plg_content_confirmconsent', 'plugin', 'confirmconsent', 'content', 0, 0, 1, 0, 1, '', '{}', '', 1, 0),
diff --git a/installation/sql/postgresql/base.sql b/installation/sql/postgresql/base.sql
index b081088994320..84bdd9e9b1c3e 100644
--- a/installation/sql/postgresql/base.sql
+++ b/installation/sql/postgresql/base.sql
@@ -264,8 +264,9 @@ INSERT INTO "#__extensions" ("package_id", "name", "type", "element", "folder",
 (0, 'plg_authentication_cookie', 'plugin', 'cookie', 'authentication', 0, 1, 1, 0, 1, '', '', '', 1, 0),
 (0, 'plg_authentication_joomla', 'plugin', 'joomla', 'authentication', 0, 1, 1, 1, 1, '', '', '', 2, 0),
 (0, 'plg_authentication_ldap', 'plugin', 'ldap', 'authentication', 0, 0, 1, 0, 1, '', '{"host":"","port":"389","use_ldapV3":"0","negotiate_tls":"0","no_referrals":"0","auth_method":"bind","base_dn":"","search_string":"","users_dn":"","username":"admin","password":"bobby7","ldap_fullname":"fullName","ldap_email":"mail","ldap_uid":"uid"}', '', 3, 0),
-(0, 'plg_behaviour_taggable', 'plugin', 'taggable', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', 1, 0),
-(0, 'plg_behaviour_versionable', 'plugin', 'versionable', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', 2, 0),
+(0, 'plg_behaviour_compat', 'plugin', 'compat', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', 1, 0),
+(0, 'plg_behaviour_taggable', 'plugin', 'taggable', 'behaviour', 0, 1, 1, 0, 1, '', '{}', '', 2, 0),
+(0, 'plg_behaviour_versionable', 'plugin', 'versionable', 'behaviour', 0, 1, 1, 1, 1, '', '{}', '', 3, 0),
 (0, 'plg_captcha_recaptcha', 'plugin', 'recaptcha', 'captcha', 0, 0, 1, 0, 1, '', '{"public_key":"","private_key":"","theme":"clean"}', '', 1, 0),
 (0, 'plg_captcha_recaptcha_invisible', 'plugin', 'recaptcha_invisible', 'captcha', 0, 0, 1, 0, 1, '', '{"public_key":"","private_key":"","theme":"clean"}', '', 2, 0),
 (0, 'plg_content_confirmconsent', 'plugin', 'confirmconsent', 'content', 0, 0, 1, 0, 1, '', '{}', '', 1, 0),
diff --git a/libraries/src/Extension/ExtensionHelper.php b/libraries/src/Extension/ExtensionHelper.php
index 167ef57a3142f..9b236c1a8e798 100644
--- a/libraries/src/Extension/ExtensionHelper.php
+++ b/libraries/src/Extension/ExtensionHelper.php
@@ -172,6 +172,7 @@ class ExtensionHelper
         ['plugin', 'ldap', 'authentication', 0],
 
         // Core plugin extensions - behaviour
+        ['plugin', 'compat', 'behaviour', 0],
         ['plugin', 'taggable', 'behaviour', 0],
         ['plugin', 'versionable', 'behaviour', 0],
 
diff --git a/plugins/behaviour/compat/compat.xml b/plugins/behaviour/compat/compat.xml
new file mode 100644
index 0000000000000..bdae5a303c883
--- /dev/null
+++ b/plugins/behaviour/compat/compat.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<extension type="plugin" group="behaviour" method="upgrade">
+	<name>plg_behaviour_compat</name>
+	<author>Joomla! Project</author>
+	<creationDate>2023-09</creationDate>
+	<copyright>(C) 2023 Open Source Matters, Inc.</copyright>
+	<license>GNU General Public License version 2 or later; see LICENSE.txt</license>
+	<authorEmail>[email protected]</authorEmail>
+	<authorUrl>www.joomla.org</authorUrl>
+	<version>4.4.0</version>
+	<description>PLG_COMPAT_XML_DESCRIPTION</description>
+	<namespace path="src">Joomla\Plugin\Behaviour\Compat</namespace>
+	<files>
+		<folder plugin="compat">services</folder>
+		<folder>src</folder>
+	</files>
+	<languages>
+		<language tag="en-GB">language/en-GB/plg_behaviour_compat.ini</language>
+		<language tag="en-GB">language/en-GB/plg_behaviour_compat.sys.ini</language>
+	</languages>
+</extension>
diff --git a/plugins/behaviour/compat/services/provider.php b/plugins/behaviour/compat/services/provider.php
new file mode 100644
index 0000000000000..37e578701e266
--- /dev/null
+++ b/plugins/behaviour/compat/services/provider.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Behaviour.compat
+ *
+ * @copyright   (C) 2023 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\Behaviour\Compat\Extension\Compat;
+
+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) {
+                $plugin     = PluginHelper::getPlugin('behaviour', 'compat');
+                $dispatcher = $container->get(DispatcherInterface::class);
+
+                $plugin = new Compat($dispatcher, (array) $plugin);
+                $plugin->setApplication(Factory::getApplication());
+
+                return $plugin;
+            }
+        );
+    }
+};
diff --git a/plugins/behaviour/compat/src/Extension/Compat.php b/plugins/behaviour/compat/src/Extension/Compat.php
new file mode 100644
index 0000000000000..5beb39b830ff4
--- /dev/null
+++ b/plugins/behaviour/compat/src/Extension/Compat.php
@@ -0,0 +1,41 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Behaviour.compat
+ *
+ * @copyright   (C) 2023 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Plugin\Behaviour\Compat\Extension;
+
+use Joomla\CMS\Plugin\CMSPlugin;
+use Joomla\Event\SubscriberInterface;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Joomla! Compat Plugin.
+ *
+ * @since  __DEPLOY_VERSION__
+ */
+final class Compat extends CMSPlugin implements SubscriberInterface
+{
+    /**
+     * Returns an array of CMS events this plugin will listen to and the respective handlers.
+     *
+     * @return  array
+     *
+     * @since  __DEPLOY_VERSION__
+     */
+    public static function getSubscribedEvents(): array
+    {
+        /**
+         * This plugin does not listen to any events.
+         */
+        return [];
+    }
+}