Issue #3365714: move code out of sdc.module

Closes #3365714

core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php

@@ -12,7 +12,9 @@
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\Serialization\Yaml;
 use Drupal\Core\StreamWrapper\StreamWrapperManagerInterface;
+use Drupal\Core\Theme\ComponentPluginManager;
 use Drupal\Core\Theme\ThemeManagerInterface;
+use Drupal\sdc\Plugin\Component;
 
 /**
  * Parses library files to get extension data.
@@ -355,12 +357,14 @@ public function buildByExtension($extension) {
    *   Thrown when a parser exception got thrown.
    */
   protected function parseLibraryInfo($extension, $path) {
-    $libraries = [];
+    $libraries = $extension === 'core'
+      ? $this->librariesForComponents()
+      : [];
 
     $library_file = $path . '/' . $extension . '.libraries.yml';
     if (file_exists($this->root . '/' . $library_file)) {
       try {
-        $libraries = Yaml::decode(file_get_contents($this->root . '/' . $library_file)) ?? [];
+        $libraries += Yaml::decode(file_get_contents($this->root . '/' . $library_file)) ?? [];
       }
       catch (InvalidDataTypeException $e) {
         // Rethrow a more helpful exception to provide context.
@@ -381,6 +385,54 @@ protected function parseLibraryInfo($extension, $path) {
     return $libraries;
   }
 
+  /**
+   * Builds the dynamic library definitions for single directory components.
+   *
+   * @return array
+   *   The core library definitions for Single Directory Components.
+   */
+  protected function librariesForComponents(): array {
+    // Iterate over all the components to get the CSS and JS files.
+    $components = $this->componentPluginManager()->getAllComponents();
+    $libraries = array_reduce(
+      $components,
+      static function (array $libraries, Component $component) {
+        $library = $component->library;
+        if (empty($library)) {
+          return $libraries;
+        }
+        $library_name = $component->getLibraryName();
+        [, $library_id] = explode('/', $library_name);
+        return array_merge($libraries, [$library_id => $library]);
+      },
+      []
+    );
+    $libraries['components.all'] = [
+      'dependencies' => array_map(
+        static fn(Component $component) => $component->getLibraryName(),
+        $components
+      ),
+    ];
+    return $libraries;
+  }
+
+  /**
+   * Get the component plugin manager.
+   *
+   * The library discovery parser is a public service, and we cannot alter the
+   * constructor signature to inject this dependency without breaking backwards
+   * compatibility in Drupal 10.
+   *
+   * @return \Drupal\Core\Theme\ComponentPluginManager
+   *   The component plugin manager.
+   */
+  private function componentPluginManager(): ComponentPluginManager {
+    if (!isset($this->componentPluginManager)) {
+      $this->componentPluginManager = \Drupal::service('plugin.manager.sdc');
+    }
+    return $this->componentPluginManager;
+  }
+
   /**
    * Apply libraries overrides specified for the current active theme.
    *