One method would be to convert the YAML file to JSON.
function convertYamlToJson(yaml) {
var yamlReader = new com.fasterxml.jackson.databind.ObjectMapper(new com.fasterxml.jackson.dataformat.yaml.YAMLFactory());
var obj = yamlReader.readValue(yaml, java.lang.Object);
var jsonWriter = new com.fasterxml.jackson.databind.ObjectMapper();
return jsonWriter.writeValueAsString(obj);
}