Support opening a browser on startup

go/linguaevalia/linguaevalia.go

	"os/exec"
	"path"
	"strings"
	"time"
)
type Language interface {
var language = flag.String("l", "", "The language to use for code passed via stdin.")
var host = flag.String("h", "localhost", "The host to listen on.")
var port = flag.Int("p", 8000, "The port to listen on.")
var openBrowser = flag.Bool("open", false, "Whether to open a browser with the server url.")
func main() {
	var cmd string
	flag.Parse()
	switch cmd {
	case "server":
	case "server", "-open":
		if *openBrowser {
			go func() {
				time.Sleep(100 * time.Millisecond)
				exec.Command("xdg-open", fmt.Sprintf("http://localhost:%d", *port)).Run()
			}()
		}
		runServer()
	case "run":
		runOnce(flag.Args())