task

type Context struct {
	Context context.Context
	Stdin   io.Reader
	Stdout  io.Writer
	Stderr  io.Writer
	Obj     cue.Value
	Err     errors.Error
}

type Runner interface {

	// Runner runs given the current value and returns a new value which is to
	// be unified with the original result.
	Run(ctx *Context) (results interface{}, err error)
}

type RunnerFunc func(v cue.Value) (Runner, error)