args

type Builder interface {
	io.Reader
	Name(n, shortDesc string, aliases ...string)
	Usage(s string)
	Description(s string)
	Flag(flag []*Flag, t reflect.Type)
	FlagVisitor(fn func(fw FlagWriter))
	Example(s, topAnchor string)
	String() string
}

type Flag struct {
	Short       string // single character, e.g. -e, -e
	Long        string // more 2 character, e.g. --name or -name
	Description string
}

type FlagWriter func(maxFlagSize int, short, long, defaultVal, description string)

type Flags struct {
	FuncName    string
	Aliases     []string
	Flags       []*Flag
	Result      reflect.Type
	Example     string
	Usage       string
	ShortDesc   string
	Description string
}

type FunctionArg struct {
	Val  interface{}
	Kind reflect.Kind
}

type FunctionMeta struct {
	Name     string
	Redirect string
	Files    []string
	Args     []*FunctionArg
}

type MainOptions struct {
	Cookfile string
	Targets  []string
	Args     map[string]interface{}
	FuncMeta *FunctionMeta
	IsHelp   bool
}

type Redirect uint8