isovera.install

<?php

/**
 * @file
 * The installation implementation for isovera profile.
 */
use Drupal\user\Entity\User;
use Drupal\user\RoleInterface;

/**
 * Implements hook_install().
 *
 * Perform actions to set up the site for this profile.
 *
 * @see system_install()
 */
function isovera_install() {

  // Assign user 1 the "administrator" role.
  $user = User::load(1);
  $user->roles[] = 'administrator';
  $user->save();

  // Allow only administrators to create user account.
  $user_settings = \Drupal::configFactory()->getEditable('user.settings');
  $user_settings->set('register', USER_REGISTER_ADMINISTRATORS_ONLY)->save(TRUE);

  // System default permissions for system roles.
  user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access comments'));
  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array());

  // Search default permissions for system roles.
  user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('search content'));
  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('search content'));

  // Contact default permissions for the system roles.
  user_role_grant_permissions(RoleInterface::ANONYMOUS_ID, array('access site-wide contact form'));
  user_role_grant_permissions(RoleInterface::AUTHENTICATED_ID, array('access site-wide contact form'));

  // Set front page to "node".
  \Drupal::configFactory()->getEditable('system.site')->set('page.front', '/node')->save(TRUE);

  // Enable the admin theme.
  \Drupal::configFactory()->getEditable('node.settings')->set('use_admin_theme', TRUE)->save(TRUE);
}