function ConfigManager::diff

File

core/lib/Drupal/Core/Config/ConfigManager.php, line 161

Class

ConfigManager

The ConfigManager provides helper functions for the configuration system.

Namespace

Code

public function diff(StorageInterface $source_storage, StorageInterface $target_storage, $source_name, $target_name = NULL, $collection = StorageInterface::DEFAULT_COLLECTION) {
    if ($collection != StorageInterface::DEFAULT_COLLECTION) {
        $source_storage = $source_storage->createCollection($collection);
        $target_storage = $target_storage->createCollection($collection);
    }
    if (!isset($target_name)) {
        $target_name = $source_name;
    }
    // The output should show configuration object differences formatted as YAML.
    // But the configuration is not necessarily stored in files. Therefore, they
    // need to be read and parsed, and lastly, dumped into YAML strings.
    $source_data = explode("\n", Yaml::encode($source_storage->read($source_name)));
    $target_data = explode("\n", Yaml::encode($target_storage->read($target_name)));
    // Check for new or removed files.
    if ($source_data === [
        'false',
    ]) {
        // Added file.
        // Cast the result of t() to a string, as the diff engine doesn't know
        // about objects.
        $source_data = [
            (string) $this->t('File added'),
        ];
    }
    if ($target_data === [
        'false',
    ]) {
        // Deleted file.
        // Cast the result of t() to a string, as the diff engine doesn't know
        // about objects.
        $target_data = [
            (string) $this->t('File removed'),
        ];
    }
    return new Diff($source_data, $target_data);
}