lalash

type Command struct {
	Stdin      io.Reader
	Stdout     io.Writer
	Stderr     io.Writer
	ExtraFiles []*os.File
	Internal   Internal
}

type Internal struct {
	Cmds         *sync.Map
	Alias        *sync.Map
	MutVar       *sync.Map
	Var          *sync.Map
	GlobalMutVar *sync.Map
	GlobalVar    *sync.Map
	Args         *sync.Map
	Return       *sync.Map
}

type InternalCmd struct {
	Usage string
	Fn    func(context.Context, Command, string, ...string) error
}