func ensure(binary, install string) error {
	if _, err := exec.LookPath(binary); err != nil {
		return fmt.Errorf("%s: %s", binary, install)
	}
	return nil
}
func ensure(binary, install string) error {
	if _, err := exec.LookPath(binary); err != nil {
		return fmt.Errorf("%s: %s", binary, install)
	}
	return nil
}
func ensure ( binary , install string ) error { if _ , err := exec . LookPath ( binary ) ; err != nil { return fmt . Errorf ( " " , binary , install ) } return nil }
// ensure will ensure binary is on path or return an error with install message.
ensure will ensure binary is on path or return an error with install message .