cmd

type Arguments []string

type Command struct {
	// The name of the command.
	Name string
	// Aliases of the name.
	// e.g. version -> v
	Aliases []string
	// A summary explaining the function of the command.
	Summary string

	// A list of sub commands.
	Commands []Command

	// A list of arguments.
	Args Arguments
	// Options of the command.
	// e.g. --all, etc.
	Options []Option
	// The method corresponding with a list of arguments.
	Method func(args []string, options map[string]string) error
}

type Option struct {
	Name     string
	HasValue bool
}