deploy.module

<?php

/**
 * @file
 * Site deployment functions.
 */
use Drupal\Core\Extension\InfoParser;

/**
 * Updates dependencies based on the site deployment's info file.
 *
 * If during the course of development, you add a dependency to your
 * site deployment module's .info file, increment the update hook
 * (see the .install module) and this function will be called, making
 * sure dependencies are enabled.
 */
function deploy_update_dependencies() {
  $parser = new InfoParser;
  $info_file = $parser->parse(drupal_get_path('module', 'deploy') . '/deploy.info.yml');
  if (isset($info_file['dependencies'])) {
    \Drupal::service('module_installer')->install($info_file['dependencies'], TRUE);
  }
}

/**
 * Set the UUID of this website.
 *
 * By default, reinstalling a site will assign it a new random UUID, making
 * it impossible to sync configuration with other instances. This function
 * is called by site deployment module's .install hook.
 *
 * @param $uuid
 *   A uuid string, for example 'e732b460-add4-47a7-8c00-e4dedbb42900'.
 */
function deploy_set_uuid($uuid) {
  \Drupal::configFactory()->getEditable('system.site')
    ->set('uuid', $uuid)
    ->save();
}