edlp_d8/sites/all/modules/contrib/admin/workflow/workflow.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the workflow module.
 */

/**
 * Implements hook_install().
 */
function workflow_install() {
  $url = \Drupal\Core\Url::fromRoute('system.modules_list', [], ['fragment' => 'edit-modules-workflow']);
  $message = t('Thanks for using Workflow. To maintain workflows,
    <a href=":url">install the Workflow UI module</a>. To start using
    a Workflow, add a Workflow Field to your entity.',
    [':url' => $url->toString()]
  );
  drupal_set_message($message);
}

/**
 * Implements hook_uninstall().
 */
function workflow_uninstall() {
//  \Drupal::config('workflow.settings')->clear('workflow_states_per_page')->save(); // @FIXME
}

/**
 * Implements hook_requirements().
 *
 * Let admins know that Workflow is in use.
 *
 * @todo: extend workflow_requirements() for use with Workflow Field API.
 *
 * @param $phase
 * @return array
 */
function workflow_requirements($phase) {
  $requirements = [];
  switch ($phase) {
    case 'install':
      break;

    case 'update':
      break;

    case 'runtime':
//      workflow_debug(__FILE__), __FUNCTION__, __LINE__, $form_id);  // @todo D8-port: still test this snippet.

      /*
      // Show info on admin/reports/status.
      $type_list = 'Not yet determined.';

      // $types = db_query('SELECT wid, type FROM {workflow_type_map} WHERE wid <> 0 ORDER BY type')->fetchAllKeyed();
      // If there are no types, then just bail.
      if (count($types) == 0) {
        return;
      }
      // Let's make it look nice.
      if (count($types) == 1) {
        $type_list = current($types);
      } else {
        $last = array_pop($types);
        if (count($types) > 2) {
          $type_list = implode(', ', $types) . ', and ' . $last;
        } else {
          $type_list = current($types) . ' and ' . $last;
        }
      }
       */

      /*
      $requirements['workflow'] = array(
        'title' => $t('Workflow'),
        'value' => $t('Workflow is active on the @types content types.', array('@types' => $type_list)),
        'severity' => REQUIREMENT_OK,
      );
       */
      break;

  }

  return $requirements;
}

/**
 * Implements hook_schema().
 *
 * The D8-schema's have moved to:
 * - Workflow annotation (it is a Config Entity now);
 * - WorkfowState annotation (it is a Config Entity now);
 * - WorkfowConfigTransition annotation (it is a Config Entity now);
 * - WorkflowTransition::baseFieldDefinitions();
 * - WorkflowScheduledTransition::baseFieldDefinitions().
 */
function workflow_schema() {
  return $schema = [];
}

/**
 * Drupal 8 updates.
 */

/**
 * Update from version beta1 to beta2 are not possible. Please re-install this module.
 */
function workflow_update_8001(&$sandbox) {
  drupal_set_message("Update from version beta1 to beta2 is not possible. Please re-install this module.");
}