code: func ExplicitSecretRingFile() (string, bool) {
  	if !secretRingFlagAdded {
  		panic("proper use of ExplicitSecretRingFile requires exposing flagSecretRing with AddSecretRingFlag")
  	}
  	if flagSecretRing != "" {
  		return flagSecretRing, true
  	}
  	if e := os.Getenv("CAMLI_SECRET_RING"); e != "" {
  		return e, true
  	}
  	return "", false
  }
docs: // ExplicitSecretRingFile returns the path to the user's GPG secret ring
  // file and true if it was ever set through the --secret-keyring flag or
  // the CAMLI_SECRET_RING var. It returns "", false otherwise.
  // Use of this function requires the program to call AddSecretRingFlag,
  // and before flag.Parse is called.