@Nullable OutputStream stdOut,
            @Nullable OutputStream stdErr)
            throws IOException {
        return new MavenUpCling(world).run(args, stdIn, stdOut, stdErr, true);
    }

    public MavenUpCling() {
        super();
    }

    public MavenUpCling(ClassWorld classWorld) {
        super(classWorld);
    }

    @Override
    protected Invoker createInvoker() {

        ;;
      --shell)
        MAVEN_MAIN_CLASS="org.apache.maven.cling.MavenShellCling"
        ;;
      --up)
        MAVEN_MAIN_CLASS="org.apache.maven.cling.MavenUpCling"
        ;;
      *)
        ;;
    esac
    shift
  done
}

handle_args "$@"
MAVEN_MAIN_CLASS=${MAVEN_MAIN_CLASS:=org.apache.maven.cling.MavenCling}

# Build command string for eval