func cW(w io.Writer, useColor bool, color []byte, s string, args ...interface{}) {
	if isTTY && useColor {
		w.Write(color)
	}
	fmt.Fprintf(w, s, args...)
	if isTTY && useColor {
		w.Write(reset)
	}
}
func cW(w io.Writer, useColor bool, color []byte, s string, args ...interface{}) {
	if isTTY && useColor {
		w.Write(color)
	}
	fmt.Fprintf(w, s, args...)
	if isTTY && useColor {
		w.Write(reset)
	}
}
// colorWrite