func main()

in src/checkoutservice/main.go [86:146]
50 lines of code
5 McCabe index (conditional complexity)

func main() {
	ctx := context.Background()
	if os.Getenv("ENABLE_TRACING") == "1" {
		log.Info("Tracing enabled.")
		initTracing()

	} else {
		log.Info("Tracing disabled.")
	}

	if os.Getenv("ENABLE_PROFILER") == "1" {
		log.Info("Profiling enabled.")
		go initProfiling("checkoutservice", "1.0.0")
	} else {
		log.Info("Profiling disabled.")
	}

	port := listenPort
	if os.Getenv("PORT") != "" {
		port = os.Getenv("PORT")
	}

	svc := new(checkoutService)
	mustMapEnv(&svc.shippingSvcAddr, "SHIPPING_SERVICE_ADDR")
	mustMapEnv(&svc.productCatalogSvcAddr, "PRODUCT_CATALOG_SERVICE_ADDR")
	mustMapEnv(&svc.cartSvcAddr, "CART_SERVICE_ADDR")
	mustMapEnv(&svc.currencySvcAddr, "CURRENCY_SERVICE_ADDR")
	mustMapEnv(&svc.emailSvcAddr, "EMAIL_SERVICE_ADDR")
	mustMapEnv(&svc.paymentSvcAddr, "PAYMENT_SERVICE_ADDR")

	mustConnGRPC(ctx, &svc.shippingSvcConn, svc.shippingSvcAddr)
	mustConnGRPC(ctx, &svc.productCatalogSvcConn, svc.productCatalogSvcAddr)
	mustConnGRPC(ctx, &svc.cartSvcConn, svc.cartSvcAddr)
	mustConnGRPC(ctx, &svc.currencySvcConn, svc.currencySvcAddr)
	mustConnGRPC(ctx, &svc.emailSvcConn, svc.emailSvcAddr)
	mustConnGRPC(ctx, &svc.paymentSvcConn, svc.paymentSvcAddr)

	log.Infof("service config: %+v", svc)

	lis, err := net.Listen("tcp", fmt.Sprintf(":%s", port))
	if err != nil {
		log.Fatal(err)
	}

	var srv *grpc.Server

	// Propagate trace context always
	otel.SetTextMapPropagator(
		propagation.NewCompositeTextMapPropagator(
			propagation.TraceContext{}, propagation.Baggage{}))
	srv = grpc.NewServer(
		grpc.UnaryInterceptor(otelgrpc.UnaryServerInterceptor()),
		grpc.StreamInterceptor(otelgrpc.StreamServerInterceptor()),
	)

	pb.RegisterCheckoutServiceServer(srv, svc)
	healthpb.RegisterHealthServer(srv, svc)
	log.Infof("starting to listen on tcp: %q", lis.Addr().String())
	err = srv.Serve(lis)
	log.Fatal(err)
}