Issue #2376013 by pwolanin: Drupal 8 installer initially fails if settings.php...

Issue #2376013 by pwolanin: Drupal 8 installer initially fails if settings.php and services.yml are correct, but config directories are absent

core/includes/install.core.inc

@@ -333,7 +333,7 @@ function install_begin_request(&$install_state) {
   \Drupal::setContainer($container);
 
   // Determine whether base system services are ready to operate.
-  $install_state['config_verified'] = install_verify_config_directory(CONFIG_ACTIVE_DIRECTORY) && install_verify_config_directory(CONFIG_STAGING_DIRECTORY);
+  $install_state['config_verified'] = install_ensure_config_directory(CONFIG_ACTIVE_DIRECTORY) && install_ensure_config_directory(CONFIG_STAGING_DIRECTORY);
   $install_state['database_verified'] = install_verify_database_settings();
   $install_state['settings_verified'] = $install_state['config_verified'] && $install_state['database_verified'];
 

core/includes/install.inc

@@ -514,41 +514,6 @@ function drupal_install_config_directories() {
   }
 }
 
-/**
- * Checks whether a config directory exists and is writable.
- *
- * This partially duplicates install_ensure_config_directory(), but is required
- * since the installer would create the config directory too early in the
- * installation process otherwise (e.g., when only visiting install.php when
- * there is a settings.php already, but not actually executing the
- * installation).
- *
- * @param string $type
- *   Type of config directory to return. Drupal core provides 'active' and
- *   'staging'.
- *
- * @return bool
- *   TRUE if the config directory exists and is writable.
- */
-function install_verify_config_directory($type) {
-  global $config_directories;
-  if (!isset($config_directories[$type])) {
-    return FALSE;
-  }
-  // config_get_config_directory() throws an exception when the passed $type
-  // does not exist in $config_directories. This can happen if there is a
-  // prepared settings.php that defines $config_directories already.
-  try {
-    $config_directory = config_get_config_directory($type);
-    if (is_dir($config_directory) && is_writable($config_directory)) {
-      return TRUE;
-    }
-  }
-  catch (\Exception $e) {
-  }
-  return FALSE;
-}
-
 /**
  * Ensures that the config directory exists and is writable, or can be made so.
  *