code: func runtimeArchitecture() (string, error) {
  	cmd := exec.Command("/usr/bin/uname", "-m")
  	machine, err := cmd.Output()
  	if err != nil {
  		return "", err
  	}
  	return strings.TrimSpace(string(machine)), nil
  }
docs: // runtimeArchitecture gets the name of the current architecture (x86, x86_64, i86pc, sun4v, ...)