process

type Command struct {
	Name   string
	Args   []string
	Dir    string
	Env    map[string]string
	Stdin  io.Reader
	Stdout io.Writer
	Stderr io.Writer
}

type Executor struct{}

type Result struct {
	Stdout   string
	Stderr   string
	Combined string
	ExitCode int
}

type Runner interface {
	Run(context.Context, *Command) (Result, error)
	Start(context.Context, *Command) (Running, error)
}

type Running interface {
	Done() <-chan struct{}
	Output() Result
	Wait() (Result, error)
	Stop() error
}