Issue #3047812 by bircher, Krzysztof Domański, alexpott, ricardoamaro,...

 * Allows site administrators to modify environment configuration.

 */

// Set class aliases for the classes that will go into core when we are in beta.

// See the experimental modules policy https://www.drupal.org/core/experimental

// @todo: remove class aliases in #2991683

@class_alias('Drupal\config_environment\Core\Config\StorageTransformEvent', 'Drupal\Core\Config\StorageTransformEvent');

@class_alias('Drupal\config_environment\Core\Config\ManagedStorage', 'Drupal\Core\Config\ManagedStorage');

@class_alias('Drupal\config_environment\Core\Config\StorageManagerInterface', 'Drupal\Core\Config\StorageManagerInterface');

@class_alias('Drupal\config_environment\Core\Config\ExportStorageManager', 'Drupal\Core\Config\ExportStorageManager');

@class_alias('Drupal\config_environment\Core\Config\ImportStorageTransformer', 'Drupal\Core\Config\ImportStorageTransformer');

use Drupal\Core\Routing\RouteMatchInterface;

/**

# @todo: Stop taking over config module routes in #2991683

config.sync:

  path: '/admin/config/development/configuration'

  defaults:

    _form: '\Drupal\config_environment\Form\ConfigSync'

    _title: 'Synchronize'

  requirements:

    _permission: 'synchronize configuration'

config.diff:

  path: '/admin/config/development/configuration/sync/diff/{source_name}/{target_name}'

  defaults:

    _controller: '\Drupal\config_environment\Controller\ConfigController::diff'

    target_name: NULL

  requirements:

    _permission: 'synchronize configuration'

config.diff_collection:

  path: '/admin/config/development/configuration/sync/diff_collection/{collection}/{source_name}/{target_name}'

  defaults:

    _controller: '\Drupal\config_environment\Controller\ConfigController::diff'

    target_name: NULL

  requirements:

    _permission: 'synchronize configuration'

config.export_download:

  path: '/admin/config/development/configuration/full/export-download'

  defaults:

    _controller: '\Drupal\config_environment\Controller\ConfigController::downloadExport'

  requirements:

    _permission: 'export configuration'

services:

  # @todo: Move this back to core services in #2991683

  config.import_transformer:

    class: Drupal\config_environment\Core\Config\ImportStorageTransformer

    arguments: ['@event_dispatcher', '@database']

  config.storage.export:

    class: Drupal\config_environment\Core\Config\ManagedStorage

    arguments: ['@config.storage.export.manager']

  config.storage.export.manager:

    class: Drupal\config_environment\Core\Config\ExportStorageManager

    arguments: ['@config.storage', '@state', '@database', '@event_dispatcher']

    tags:

      - { name: event_subscriber }

<?php

namespace Drupal\config_environment\Controller;

use Drupal\config\Controller\ConfigController as OriginalConfigController;

use Symfony\Component\DependencyInjection\ContainerInterface;

/**

 * Returns responses for config module routes.

 */

class ConfigController extends OriginalConfigController {

  /**

   * The import transformer service.

   *

   * @var \Drupal\Core\Config\ImportStorageTransformer

   */

  protected $importTransformer;

  /**

   * The sync storage.

   *

   * @var \Drupal\Core\Config\StorageInterface

   */

  protected $syncStorage;

  /**

   * {@inheritdoc}

   */

  public static function create(ContainerInterface $container) {

    $controller = parent::create($container);

    $controller->importTransformer = $container->get('config.import_transformer');

    $controller->syncStorage = $container->get('config.storage.sync');

    return $controller;

  }

  /**

   * {@inheritdoc}

   */

  public function diff($source_name, $target_name = NULL, $collection = NULL) {

    $this->sourceStorage = $this->importTransformer->transform($this->syncStorage);

    return parent::diff($source_name, $target_name, $collection);

  }

}

<?php

// @codingStandardsIgnoreStart

// @todo: Move this back to \Drupal\Core\Config\ConfigEvents in #2991683.

// @codingStandardsIgnoreEnd

namespace Drupal\config_environment\Core\Config;

/**

 * Defines events for the configuration transform system.

 *

 * The constants in this class will be moved back into ConfigEvents.

 * But due to the fact that the config_environment is not in beta we save their

 * definitions here and use the literal strings in the mean time.

 *

 * @internal

 *

 * @deprecated The class will be merged with Drupal\Core\Config\ConfigEvents.

 */

final class ConfigEvents {

  /**

   * Name of the event fired just before importing configuration.

   *

   * This event allows subscribers to modify the configuration which is about to

   * be imported. The event listener method receives a

   * \Drupal\Core\Config\StorageTransformEvent instance. This event contains a

   * config storage which subscribers can interact with and which will finally

   * be used to import the configuration from.

   * Together with \Drupal\Core\Config\ConfigEvents::STORAGE_TRANSFORM_EXPORT

   * subscribers can alter the active configuration in a config sync workflow

   * instead of just overriding at runtime via the config-override system.

   * This allows a complete customisation of the workflow including additional

   * modules and editable configuration in different environments.

   *

   * @code

   *   $storage = $event->getStorage();

   * @endcode

   *

   * This event is also fired when just viewing the difference of configuration

   * to be imported independently of whether the import takes place or not.

   * Use the \Drupal\Core\Config\ConfigEvents::IMPORT event to subscribe to the

   * import having taken place.

   *

   * @Event

   *

   * @see \Drupal\Core\Config\StorageTransformEvent

   * @see \Drupal\Core\Config\ConfigEvents::STORAGE_TRANSFORM_EXPORT

   *

   * @var string

   */

  const STORAGE_TRANSFORM_IMPORT = 'config.transform.import';

  /**

   * Name of the event fired when the export storage is used.

   *

   * This event allows subscribers to modify the configuration which is about to

   * be exported. The event listener method receives a

   * \Drupal\Core\Config\StorageTransformEvent instance. This event contains a

   * config storage which subscribers can interact with and which will finally

   * be used to export the configuration from.

   *

   * @code

   *   $storage = $event->getStorage();

   * @endcode

   *

   * Typically subscribers will want to perform the reverse operation on the

   * storage than for \Drupal\Core\Config\ConfigEvents::STORAGE_TRANSFORM_IMPORT

   * to make sure successive exports and imports yield no difference.

   *

   * @Event

   *

   * @see \Drupal\Core\Config\StorageTransformEvent

   * @see \Drupal\Core\Config\ConfigEvents::STORAGE_TRANSFORM_IMPORT

   *

   * @var string

   */

  const STORAGE_TRANSFORM_EXPORT = 'config.transform.export';

}