--- /dev/null
+<?php
+
+namespace Drupal\devel\Plugin\Derivative;
+
+use Drupal\Component\Plugin\Derivative\DeriverBase;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\Core\StringTranslation\TranslationInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides local task definitions for all entity bundles.
+ *
+ * @see \Drupal\devel\Controller\EntityDebugController
+ * @see \Drupal\devel\Routing\RouteSubscriber
+ */
+class DevelLocalTask extends DeriverBase implements ContainerDeriverInterface {
+
+ use StringTranslationTrait;
+
+ /**
+ * The entity manager
+ *
+ * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+ */
+ protected $entityTypeManager;
+
+ /**
+ * Creates an DevelLocalTask object.
+ *
+ * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+ * The entity manager.
+ * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
+ * The translation manager.
+ */
+ public function __construct(EntityTypeManagerInterface $entity_type_manager, TranslationInterface $string_translation) {
+ $this->entityTypeManager = $entity_type_manager;
+ $this->stringTranslation = $string_translation;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container, $base_plugin_id) {
+ return new static(
+ $container->get('entity_type.manager'),
+ $container->get('string_translation')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getDerivativeDefinitions($base_plugin_definition) {
+ $this->derivatives = [];
+
+ foreach ($this->entityTypeManager->getDefinitions() as $entity_type_id => $entity_type) {
+
+ $has_edit_path = $entity_type->hasLinkTemplate('devel-load');
+ $has_canonical_path = $entity_type->hasLinkTemplate('devel-render');
+
+ if ($has_edit_path || $has_canonical_path) {
+
+ $this->derivatives["$entity_type_id.devel_tab"] = [
+ 'route_name' => "entity.$entity_type_id." . ($has_edit_path ? 'devel_load' : 'devel_render'),
+ 'title' => $this->t('Devel'),
+ 'base_route' => "entity.$entity_type_id." . ($has_canonical_path ? "canonical" : "edit_form"),
+ 'weight' => 100,
+ ];
+
+ $this->derivatives["$entity_type_id.devel_definition_tab"] = [
+ 'route_name' => "entity.$entity_type_id.devel_definition",
+ 'title' => $this->t('Definition'),
+ 'parent_id' => "devel.entities:$entity_type_id.devel_tab",
+ 'weight' => 100,
+ ];
+
+ if ($has_canonical_path) {
+ $this->derivatives["$entity_type_id.devel_render_tab"] = [
+ 'route_name' => "entity.$entity_type_id.devel_render",
+ 'weight' => 100,
+ 'title' => $this->t('Render'),
+ 'parent_id' => "devel.entities:$entity_type_id.devel_tab",
+ ];
+ }
+
+ if ($has_edit_path) {
+ $this->derivatives["$entity_type_id.devel_load_tab"] = [
+ 'route_name' => "entity.$entity_type_id.devel_load",
+ 'weight' => 100,
+ 'title' => $this->t('Load'),
+ 'parent_id' => "devel.entities:$entity_type_id.devel_tab",
+ ];
+ }
+ }
+ }
+
+ foreach ($this->derivatives as &$entry) {
+ $entry += $base_plugin_definition;
+ }
+
+ return $this->derivatives;
+ }
+
+}