rabbit_hole-8.x-1.x-dev/modules/rh_node/rh_node.module

<?php

/**
 * @file
 * Contains rh_node.module.
 */

use Drupal\Core\Entity\EntityTypeInterface;

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * This will add Rabbit Hole options to the node type form. These settings will
 * be used as default for every node of this node type.
 */
function rh_node_form_node_type_form_alter(&$form, $form_state) {
  // Add the Rabbit Hole form, and add an extra javascript file that's needed
  // for the fieldset summary.
  $form['#attached']['library'][] = 'rh_node/node-form';
}

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * This will add Rabbit Hole options to the node form. The user will be able to
 * override the default Rabbit Hole options.
 */
function rh_node_form_node_form_alter(&$form, $form_state) {
  // Add the Rabbit Hole form, and add an extra javascript file that's needed
  // for the fieldset summary.
  $form['#attached']['library'][] = 'rh_node/node-form';
}

/**
 * Implements hook_entity_base_field_info().
 */
function rh_node_entity_base_field_info(EntityTypeInterface $entity_type) {
  if ($entity_type->id() == 'node') {
    return \Drupal::service('rabbit_hole.entity_extender')
      ->getRabbitHoleFields('node');
  }
}