Issue #2580255 by Wim Leers: Remove (classy|seven)_library_info_alter() in favor of libraries-extend

core/themes/classy/classy.info.yml

@@ -8,3 +8,11 @@ core: 8.x
 libraries:
   - classy/base
   - core/normalize
+
+libraries-extend:
+  user/drupal.user:
+    - classy/user
+  core/drupal.dropbutton:
+    - classy/dropbutton
+  core/drupal.dialog:
+    - classy/dialog

core/themes/classy/classy.theme

@@ -1,26 +0,0 @@
-<?php
-
-/**
- * @file
- * Functions to support theming in the Classy theme.
- */
-
-/**
- * Implements hook_library_info_alter().
- */
-function classy_library_info_alter(&$libraries, $extension) {
-  if ($extension == 'user' && isset($libraries['drupal.user'])) {
-    // @todo Replace with https://www.drupal.org/node/2497667 when possible.
-    $library_discovery = \Drupal::service('library.discovery');
-    $library = $library_discovery->getLibraryByName('classy', 'user');
-    foreach ($library['css'] as $css) {
-      $libraries['drupal.user']['css']['component'][base_path() . $css['data']] = [];
-    }
-  }
-  if ($extension == 'core' && isset($libraries['drupal.dropbutton'])) {
-    $libraries['drupal.dropbutton']['dependencies'][] = 'classy/dropbutton';
-  }
-  if ($extension == 'core' && isset($libraries['drupal.dialog'])) {
-    $libraries['drupal.dialog']['dependencies'][] = 'classy/dialog';
-  }
-}

core/themes/seven/seven.info.yml

@@ -9,10 +9,25 @@ core: 8.x
 libraries:
  - seven/global-styling
 libraries-override:
+  core/drupal.vertical-tabs:
+    css:
+      component:
+        misc/vertical-tabs.css: false
+  core/jquery.ui:
+    css:
+      theme:
+        assets/vendor/jquery.ui/themes/base/theme.css: false
   core/jquery.ui.dialog:
     css:
       component:
         assets/vendor/jquery.ui/themes/base/dialog.css: false
+  classy/dialog:
+    seven/seven.drupal.dialog
+libraries-extend:
+  core/drupal.vertical-tabs:
+    - seven/vertical-tabs
+  core/jquery.ui:
+    - seven/seven.jquery.ui
 quickedit_stylesheets:
   - css/components/quickedit.css
 regions:

core/themes/seven/seven.theme

@@ -187,21 +187,3 @@ function seven_form_node_form_alter(&$form, FormStateInterface $form_state) {
   $form['revision_information']['#type'] = 'container';
   $form['revision_information']['#group'] = 'meta';
 }
-
-/**
- * Implements hook_library_info_alter().
- */
-function seven_library_info_alter(&$libraries, $extension) {
-  if ($extension == 'core' && isset($libraries['drupal.vertical-tabs'])) {
-    unset($libraries['drupal.vertical-tabs']['css']['component']['misc/vertical-tabs.css']);
-    $libraries['drupal.vertical-tabs']['dependencies'][] = 'seven/vertical-tabs';
-  }
-  if ($extension == 'core' && isset($libraries['jquery.ui'])) {
-    unset($libraries['jquery.ui']['css']['theme']['assets/vendor/jquery.ui/themes/base/theme.css']);
-    $libraries['jquery.ui']['dependencies'][] = 'seven/seven.jquery.ui';
-  }
-  if ($extension == 'classy' && isset($libraries['dialog'])) {
-    unset($libraries['dialog']['css']['component']['css/components/dialog.css']);
-    $libraries['dialog']['dependencies'][] = 'seven/seven.drupal.dialog';
-  }
-}