Issue #2991346 by alexpott: The message displayed by taxonomy_update_8601() should be overridable

core/modules/taxonomy/taxonomy.install

@@ -138,9 +138,10 @@ function taxonomy_update_8601() {
 
   // Bail out early if a field named 'status' is already installed.
   if ($definition_update_manager->getFieldStorageDefinition('status', 'taxonomy_term')) {
-    return t('The publishing status field has <strong>not</strong> been added to taxonomy terms. See <a href=":link">this page</a> for more information on how to install it.', [
+    $message = \Drupal::state()->get('taxonomy_update_8601_skip_message', t('The publishing status field has <strong>not</strong> been added to taxonomy terms. See <a href=":link">this page</a> for more information on how to install it.', [
       ':link' => 'https://www.drupal.org/node/2985366',
-    ]);
+    ]));
+    return $message;
   }
 
   // Add the 'published' entity key to the taxonomy_term entity type.

core/modules/taxonomy/tests/src/Functional/Update/TaxonomyTermUpdatePathTest.php

@@ -80,6 +80,13 @@ public function testPublishable() {
     $term->save();
     $term = $storage->loadUnchanged($term->id());
     $this->assertFalse($term->isPublished());
+
+    // Test the update does not run when a status field already exists.
+    module_load_install('taxonomy');
+    $this->assertEquals('The publishing status field has <strong>not</strong> been added to taxonomy terms. See <a href="https://www.drupal.org/node/2985366">this page</a> for more information on how to install it.', (string) taxonomy_update_8601());
+    // Test the message can be overridden.
+    \Drupal::state()->set('taxonomy_update_8601_skip_message', 'Another message');
+    $this->assertEquals('Another message', (string) taxonomy_update_8601());
   }
 
   /**