install_install_profile

install_install_profile(&$install_state)

function install_install_profile(&$install_state) {
  \Drupal::service('module_installer')->install(array(drupal_get_profile()), FALSE);
  // Install all available optional config. During installation the module order
  // is determined by dependencies. If there are no dependencies between modules
  // then the order in which they are installed is dependent on random factors
  // like PHP version. Optional configuration therefore might or might not be
  // created depending on this order. Ensuring that we have installed all of the
  // optional configuration whose dependencies can be met at this point removes
  // any disparities that this creates.
  \Drupal::service('config.installer')->installOptionalConfig();

  // Ensure that the install profile's theme is used.
  // @see _drupal_maintenance_theme()
  \Drupal::service('theme.manager')->resetActiveTheme();
}