diff --git a/src/DependencyInjection/Compiler/ModuleManagerPass.php b/src/DependencyInjection/Compiler/ModuleManagerPass.php
new file mode 100644
index 0000000000..a071484990
--- /dev/null
+++ b/src/DependencyInjection/Compiler/ModuleManagerPass.php
@@ -0,0 +1,58 @@
+<?php
+
+// {{{ License
+// This file is part of GNU social - https://www.gnu.org/software/social
+//
+// GNU social is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// GNU social is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.
+// }}}
+
+/**
+ * Module and plugin loader code, one of the main features of GNU social
+ *
+ * Loads plugins from `plugins/enabled`, instances them
+ * and hooks its events
+ *
+ * @package   GNUsocial
+ * @category  Modules
+ *
+ * @author    Hugo Sales <hugo@fc.up.pt>
+ * @copyright 2020 Free Software Foundation, Inc http://www.fsf.org
+ * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
+ */
+
+namespace App\DependencyInjection\Compiler;
+
+use App\Core\ModuleManager;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+class ModuleManagerPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container)
+    {
+        $module_paths   = array_merge(glob(INSTALLDIR . '/components/*/*.php'), glob(INSTALLDIR . '/plugins/*/*.php'));
+        $module_manager = new ModuleManager();
+        foreach ($module_paths as $path) {
+            // 'modules' and 'plugins' have the same length
+            $type   = ucfirst(preg_replace('%' . INSTALLDIR . '/(component|plugin)s/.*%', '\1', $path));
+            $module = basename(dirname($path));
+            $fqcn   = "\\{$type}\\{$module}\\{$module}";
+            $module_manager->add($fqcn, $path);
+        }
+
+        $module_manager->preRegisterEvents();
+
+        file_put_contents(INSTALLDIR . '/var/cache/module_manager.php', "<?php\nreturn " . var_export($module_manager, true) . ';');
+    }
+}
diff --git a/src/Kernel.php b/src/Kernel.php
index 0425631060..726b804746 100644
--- a/src/Kernel.php
+++ b/src/Kernel.php
@@ -30,6 +30,7 @@
 
 namespace App;
 
+use App\DependencyInjection\Compiler\ModuleManagerPass;
 use App\DependencyInjection\Compiler\SchemaDefPass;
 use const PHP_VERSION_ID;
 use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
@@ -121,5 +122,6 @@ class Kernel extends BaseKernel
         parent::build($container);
 
         $container->addCompilerPass(new SchemaDefPass());
+        $container->addCompilerPass(new ModuleManagerPass());
     }
 }