Issue #2822890 by danflanagan8, Peacog, Lendude, quietone, smustgrave,...

Issue #2822890 by danflanagan8, Peacog, Lendude, quietone, smustgrave, AaronMcHale, benjifisher: Taxonomy vocabulary translation local task tab not shown in UI

core/modules/config_translation/tests/src/Functional/ConfigTranslationListUiTest.php

@@ -192,6 +192,11 @@ protected function doVocabularyListTest() {
     // Test if the link to translate actually goes to the translate page.
     $this->drupalGet($translate_link);
     $this->assertSession()->responseContains('<th>Language</th>');
+
+    // Test if the local task for translation is on this page.
+    $this->assertSession()->linkExists('Translate taxonomy vocabulary');
+    $local_task_url = parse_url($this->getSession()->getPage()->findLink('Translate taxonomy vocabulary')->getAttribute('href'));
+    $this->assertSame(base_path() . $translate_link, $local_task_url['path']);
   }
 
   /**

core/modules/taxonomy/taxonomy.module

@@ -73,6 +73,21 @@ function taxonomy_theme_suggestions_taxonomy_term(array $variables) {
   return $suggestions;
 }
 
+/**
+ * Implements hook_local_tasks_alter().
+ *
+ * @todo Evaluate removing as part of https://www.drupal.org/node/2358923.
+ */
+function taxonomy_local_tasks_alter(&$local_tasks) {
+  $local_task_key = 'config_translation.local_tasks:entity.taxonomy_vocabulary.config_translation_overview';
+  if (isset($local_tasks[$local_task_key])) {
+    // The config_translation module expects the base route to be
+    // entity.taxonomy_vocabulary.edit_form like it is for other configuration
+    // entities. Taxonomy uses the overview_form as the base route.
+    $local_tasks[$local_task_key]['base_route'] = 'entity.taxonomy_vocabulary.overview_form';
+  }
+}
+
 /**
  * Prepares variables for taxonomy term templates.
  *