class RecipeDiscovery

final class RecipeDiscovery {
    
    /**
     * Constructs a recipe discovery object.
     *
     * @param string $path
     *   The path will be searched folders containing a recipe.yml. There will be
     *   no traversal further into the directory structure.
     */
    public function __construct(string $path) {
    }
    
    /**
     * Gets a recipe object.
     *
     * @param string $name
     *   The machine name of the recipe to find.
     *
     * @return \Drupal\Core\Recipe\Recipe
     *   The recipe object.
     *
     * @throws \Drupal\Core\Recipe\UnknownRecipeException
     *   Thrown when the recipe cannot be found.
     */
    public function getRecipe(string $name) : Recipe {
        // In order to allow recipes to include core provided recipes, $name can be
        // a Drupal root relative path to a recipe folder. For example, a recipe can
        // include the core provided 'article_tags' recipe by listing the recipe as
        // 'core/recipes/article_tags'. It is strongly recommended not to rely on
        // relative paths for including recipes. Required recipes should be put in
        // the same parent directory as the recipe being applied. Note, only linux
        // style directory separators are supported. PHP on Windows can resolve the
        // mix of directory separators.
        if (str_contains($name, '/')) {
            $path = \Drupal::root() . "/{$name}/recipe.yml";
        }
        else {
            $path = $this->path . "/{$name}/recipe.yml";
        }
        if (file_exists($path)) {
            return Recipe::createFromDirectory(dirname($path));
        }
        $search_path = dirname($path, 2);
        throw new UnknownRecipeException($name, $search_path, sprintf("Can not find the %s recipe, search path: %s", $name, $search_path));
    }

}