install_begin_request

install_begin_request($class_loader, &$install_state)

function install_begin_request($class_loader, &$install_state) {
  $request = Request::createFromGlobals();

  // Add any installation parameters passed in via the URL.
  if ($install_state['interactive']) {
    $install_state['parameters'] += $request->query->all();
  }

  // Validate certain core settings that are used throughout the installation.
  if (!empty($install_state['parameters']['profile'])) {
    $install_state['parameters']['profile'] = preg_replace('/[^a-zA-Z_0-9]/', '', $install_state['parameters']['profile']);
  }
  if (!empty($install_state['parameters']['langcode'])) {
    $install_state['parameters']['langcode'] = preg_replace('/[^a-zA-Z_0-9\-]/', '', $install_state['parameters']['langcode']);
  }

  // Allow command line scripts to override server variables used by Drupal.
  require_once __DIR__ . '/bootstrap.inc';

  // Before having installed the system module and being able to do a module
  // rebuild, prime the drupal_get_filename() static cache with the module's
  // exact location.
  // @todo Remove as part of https://www.drupal.org/node/2186491
  drupal_get_filename('module', 'system', 'core/modules/system/system.info.yml');

  // If the hash salt leaks, it becomes possible to forge a valid testing user
  // agent, install a new copy of Drupal, and take over the original site.
  // The user agent header is used to pass a database prefix in the request when
  // running tests. However, for security reasons, it is imperative that no
  // installation be permitted using such a prefix.
  $user_agent = $request->cookies->get('SIMPLETEST_USER_AGENT') ? : $request->server->get('HTTP_USER_AGENT');
  if ($install_state['interactive'] && strpos($user_agent, 'simpletest') !== FALSE && !drupal_valid_test_ua()) {
    header($request->server->get('SERVER_PROTOCOL') . ' 403 Forbidden');
    exit;
  }

  $site_path = DrupalKernel::findSitePath($request, FALSE);
  Settings::initialize(dirname(dirname(__DIR__)), $site_path, $class_loader);

  // Ensure that procedural dependencies are loaded as early as possible,
  // since the error/exception handlers depend on them.
  require_once __DIR__ . '/../modules/system/system.install';
  require_once __DIR__ . '/common.inc';
  require_once __DIR__ . '/file.inc';
  require_once __DIR__ . '/install.inc';
  require_once __DIR__ . '/schema.inc';
  require_once __DIR__ . '/database.inc';
  require_once __DIR__ . '/form.inc';
  require_once __DIR__ . '/batch.inc';

  // Load module basics (needed for hook invokes).
  include_once __DIR__ . '/module.inc';
  require_once __DIR__ . '/entity.inc';

  // Create a minimal mocked container to support calls to t() in the pre-kernel
  // base system verification code paths below. The strings are not actually
  // used or output for these calls.
  // @todo Separate API level checks from UI-facing error messages.
  $container = new ContainerBuilder();
  $container->setParameter('language.default_values', Language::$defaultValues);
  $container
  ->register('language.default', 'Drupal\Core\Language\LanguageDefault')
    ->addArgument('%language.default_values%');
  $container
  ->register('string_translation', 'Drupal\Core\StringTranslation\TranslationManager')
    ->addArgument(new Reference('language.default'));

  // Register the stream wrapper manager.
  $container
  ->register('stream_wrapper_manager', 'Drupal\Core\StreamWrapper\StreamWrapperManager')
    ->addMethodCall('setContainer', array(new Reference('service_container')));
  $container
  ->register('file_system', 'Drupal\Core\File\FileSystem')
    ->addArgument(new Reference('stream_wrapper_manager'))
    ->addArgument(Settings::getInstance())
    ->addArgument((new LoggerChannelFactory())->get('file'));

  \Drupal::setContainer($container);

  // Determine whether base system services are ready to operate.
  try {
    $sync_directory = config_get_config_directory(CONFIG_SYNC_DIRECTORY);
    $install_state['config_verified'] = file_exists($sync_directory);
  }
  catch (Exception $e) {
    $install_state['config_verified'] = FALSE;
  }
  $install_state['database_verified'] = install_verify_database_settings($site_path);
  // A valid settings.php has database settings and a hash_salt value. Other
  // settings like config_directories will be checked by system_requirements().
  $install_state['settings_verified'] = $install_state['database_verified'] && (bool) Settings::get('hash_salt', FALSE);

  // Install factory tables only after checking the database.
  if ($install_state['database_verified'] && $install_state['database_ready']) {
    $container
    ->register('path.matcher', 'Drupal\Core\Path\PathMatcher')
      ->addArgument(new Reference('config.factory'));
  }

  if ($install_state['settings_verified']) {
    try {
      $system_schema = system_schema();
      end($system_schema);
      $table = key($system_schema);
      $install_state['base_system_verified'] = Database::getConnection()->schema()->tableExists($table);
    }
    catch (DatabaseExceptionWrapper $e) {
      // The last defined table of the base system_schema() does not exist yet.
      // $install_state['base_system_verified'] defaults to FALSE, so the code
      // following below will use the minimal installer service container.
      // As soon as the base system is verified here, the installer operates in
      // a full and regular Drupal environment, without any kind of exceptions.
    }
  }

  // Replace services with in-memory and null implementations. This kernel is
  // replaced with a regular one in drupal_install_system().
  if (!$install_state['base_system_verified']) {
    $environment = 'install';
    $GLOBALS['conf']['container_service_providers']['InstallerServiceProvider'] = 'Drupal\Core\Installer\InstallerServiceProvider';
  }
  else {
    $environment = 'prod';
  }

  // Only allow dumping the container once the hash salt has been created.
  $kernel = InstallerKernel::createFromRequest($request, $class_loader, $environment, (bool) Settings::get('hash_salt', FALSE));
  $kernel->setSitePath($site_path);
  $kernel->boot();
  $container = $kernel->getContainer();
  // If Drupal is being installed behind a proxy, configure the request.
  ReverseProxyMiddleware::setSettingsOnRequest($request, Settings::getInstance());

  // Register the file translation service.
  if (isset($GLOBALS['config']['locale.settings']['translation']['path'])) {
    $directory = $GLOBALS['config']['locale.settings']['translation']['path'];
  }
  else {
    $directory = $site_path . '/files/translations';
  }
  $container->set('string_translator.file_translation', new FileTranslation($directory));
  $container->get('string_translation')
    ->addTranslator($container->get('string_translator.file_translation'));

  // Add list of all available profiles to the installation state.
  $listing = new ExtensionDiscovery($container->get('app.root'));
  $listing->setProfileDirectories(array());
  $install_state['profiles'] += $listing->scan('profile');

  // Prime drupal_get_filename()'s static cache.
  foreach ($install_state['profiles'] as $name => $profile) {
    drupal_get_filename('profile', $name, $profile->getPathname());
  }

  if ($profile = _install_select_profile($install_state)) {
    $install_state['parameters']['profile'] = $profile;
    install_load_profile($install_state);
    if (isset($install_state['profile_info']['distribution']['install']['theme'])) {
      $install_state['theme'] = $install_state['profile_info']['distribution']['install']['theme'];
    }
  }

  // Use the language from the profile configuration, if available, to override
  // the language previously set in the parameters.
  if (isset($install_state['profile_info']['distribution']['langcode'])) {
    $install_state['parameters']['langcode'] = $install_state['profile_info']['distribution']['langcode'];
  }

  // Set the default language to the selected language, if any.
  if (isset($install_state['parameters']['langcode'])) {
    $default_language = new Language(array('id' => $install_state['parameters']['langcode']));
    $container->get('language.default')->set($default_language);
    \Drupal::translation()->setDefaultLangcode($install_state['parameters']['langcode']);
  }

  // Override the module list with a minimal set of modules.
  $module_handler = \Drupal::moduleHandler();
  if (!$module_handler->moduleExists('system')) {
    $module_handler->addModule('system', 'core/modules/system');
  }
  if ($profile && !$module_handler->moduleExists($profile)) {
    $module_handler->addProfile($profile, $install_state['profiles'][$profile]->getPath());
  }

  // Load all modules and perform request related initialization.
  $kernel->preHandle($request);

  // Initialize a route on this legacy request similar to
  // \Drupal\Core\DrupalKernel::prepareLegacyRequest() since normal routing
  // will not happen.
  $request->attributes->set(RouteObjectInterface::ROUTE_OBJECT, new Route('<none>'));
  $request->attributes->set(RouteObjectInterface::ROUTE_NAME, '<none>');

  // Prepare for themed output. We need to run this at the beginning of the
  // page request to avoid a different theme accidentally getting set. (We also
  // need to run it even in the case of command-line installations, to prevent
  // any code in the installer that happens to initialize the theme system from
  // accessing the database before it is set up yet.)
  drupal_maintenance_theme();

  if ($install_state['database_verified']) {
    // Verify the last completed task in the database, if there is one.
    $task = install_verify_completed_task();
  }
  else {
    $task = NULL;

    // Do not install over a configured settings.php.
    if (Database::getConnectionInfo()) {
      throw new AlreadyInstalledException($container->get('string_translation'));
    }
  }

  // Ensure that the active configuration is empty before installation starts.
  if ($install_state['config_verified'] && empty($task)) {
    if (count($kernel->getConfigStorage()->listAll())) {
      $task = NULL;
      throw new AlreadyInstalledException($container->get('string_translation'));
    }
  }

  // Modify the installation state as appropriate.
  $install_state['completed_task'] = $task;
}