Function GetInputValue

private/buf/bufcli/flags_args.go:267–294

GetInputValue gets the first arg. Also parses the special input hashtag flag that deals with the situation "buf build -#format=json". The existence of 0 or 1 args should be handled by the Args field on Command.

(
	container app.ArgContainer,
	inputHashtag string,
	defaultValue string,
)

// Also parses the special input hashtag flag that deals with the situation "buf build -#format=json".
// The existence of 0 or 1 args should be handled by the Args field on Command.
func GetInputValue(
	container app.ArgContainer,
	inputHashtag string,
	defaultValue string,
) (string, error) {
	var arg string
	switch numArgs := container.NumArgs(); numArgs {
	case 0:
		if inputHashtag != "" {
			arg = "-#" + inputHashtag
		}
	case 1:
		arg = container.Arg(0)
		if arg == "" {
			return "", errors.New("first argument is present but empty")
		}
		// if arg is non-empty and inputHashtag is non-empty, this means two arguments were specified
		if inputHashtag != "" {
			return "", errors.New("only 1 argument allowed but 2 arguments specified")
		}
	default:
		return "", fmt.Errorf("only 1 argument allowed but %d arguments specified", numArgs)
	}
	if arg != "" {
		return arg, nil
	}
	return defaultValue, nil
}

// VisibilityFlagToVisibilityAllowUnspecified parses the given string as a modulev1.ModuleVisibility
// where an empty string will be parsed as unspecified