function StorageCopyTrait::replaceStorageContents

Copy the configuration from one storage to another and remove stale items.

This method empties target storage and copies all collections from source. Configuration is only copied and not imported, should not be used with the active storage as the target.

Parameters

\Drupal\Core\Config\StorageInterface $source: The configuration storage to copy from.

\Drupal\Core\Config\StorageInterface $target: The configuration storage to copy to.

File

core/lib/Drupal/Core/Config/StorageCopyTrait.php, line 22

Class

StorageCopyTrait

Utility trait to copy configuration from one storage to another.

Namespace

Code

protected static function replaceStorageContents(StorageInterface $source, StorageInterface &$target) {
    // Remove all collections from the target which are not in the source.
    foreach (array_diff($target->getAllCollectionNames(), $source->getAllCollectionNames()) as $collection) {
        // We do this first so we don't have to loop over the added collections.
        $target->createCollection($collection)
            ->deleteAll();
    }
    // Copy all the configuration from all the collections.
    foreach (array_merge([
        StorageInterface::DEFAULT_COLLECTION,
    ], $source->getAllCollectionNames()) as $collection) {
        $source_collection = $source->createCollection($collection);
        $target_collection = $target->createCollection($collection);
        $names = $source_collection->listAll();
        // First we delete all the config which shouldn't be in the target.
        foreach (array_diff($target_collection->listAll(), $names) as $name) {
            $target_collection->delete($name);
        }
        // Then we loop over the config which needs to be there.
        foreach ($names as $name) {
            $data = $source_collection->read($name);
            if ($data !== FALSE) {
                if ($target_collection->read($name) !== $data) {
                    // Update the target collection if the data is different.
                    $target_collection->write($name, $data);
                }
            }
            else {
                $target_collection->delete($name);
                \Drupal::logger('config')->notice('Missing required data for configuration: %config', [
                    '%config' => $name,
                ]);
            }
        }
    }
    // Make sure that the target is set to the same collection as the source.
    $target = $target->createCollection($source->getCollectionName());
}