func BeforeRun()

in service/service.go [89:131]
33 lines of code
6 McCabe index (conditional complexity)

func BeforeRun() {
	logger := logp.NewLogger("service")
	if withCPUProfile() {
		cpuOut, err := os.Create(*cpuprofile)
		if err != nil {
			logger.Errorf("Failed to create CPU profile: %v", err)
			os.Exit(1)
		}
		err = pprof.StartCPUProfile(cpuOut)
		if err != nil {
			logger.Errorf("Failed to start CPU profiler: %v", err)
			os.Exit(1)
		}
	}

	if *httpprof == "" {
		return
	}

	logger.Info("Start pprof endpoint")
	mux := http.NewServeMux()

	// Register pprof handler
	mux.HandleFunc("/debug/pprof/", func(w http.ResponseWriter, r *http.Request) {
		http.DefaultServeMux.ServeHTTP(w, r)
	})

	// Register metrics handler
	mux.HandleFunc("/debug/vars", metricsHandler)

	// Ensure we are listening before returning
	listener, err := net.Listen("tcp", *httpprof)
	if err != nil {
		logger.Errorf("Failed to start pprof listener: %v", err)
		os.Exit(1)
	}

	go func() {
		// Serve returns always a non-nil error
		err := http.Serve(listener, mux)
		logger.Infof("Finished pprof endpoint: %v", err)
	}()
}