FreePort

Return a free tcp port.

Minimal example of using:

func main(){
	port, err := freeport.Get()
	if err != nil {
		panic(err)
	}
	if 0 < port && port < 65536 {
		fmt.Println("Found free tcp port")
	}
}

or:

func main() {
	port, err := freeport.Get()
	if err != nil {
		fmt.Println(err.Error())
		os.Exit(1)
	}
	fmt.Print(port)
}