ConfigManager::createSnapshot

public ConfigManager::createSnapshot(StorageInterface $source_storage, StorageInterface $snapshot_storage)

public function createSnapshot(StorageInterface $source_storage, StorageInterface $snapshot_storage) {
  // Empty the snapshot of all configuration.
  $snapshot_storage->deleteAll();
  foreach ($snapshot_storage->getAllCollectionNames() as $collection) {
    $snapshot_collection = $snapshot_storage->createCollection($collection);
    $snapshot_collection->deleteAll();
  }
  foreach ($source_storage->listAll() as $name) {
    $snapshot_storage->write($name, $source_storage->read($name));
  }
  // Copy collections as well.
  foreach ($source_storage->getAllCollectionNames() as $collection) {
    $source_collection = $source_storage->createCollection($collection);
    $snapshot_collection = $snapshot_storage->createCollection($collection);
    foreach ($source_collection->listAll() as $name) {
      $snapshot_collection->write($name, $source_collection->read($name));
    }
  }
}