func main()

in benchmarks/benchmark/tools/locust-load-inference/locust-custom-exporter/main.go [164:197]
29 lines of code
2 McCabe index (conditional complexity)

func main() {
	var (
		listenAddress = kingpin.Flag("web.listen-address", "Address to listen on for web interface and telemetry.").Default(":8080").Envar("locust_custom_exporter_WEB_LISTEN_ADDRESS").String()
		metricsPath   = kingpin.Flag("web.telemetry-path", "Path under which to expose metrics.").Default("/metrics").Envar("locust_custom_exporter_WEB_TELEMETRY_PATH").String()
		uri           = kingpin.Flag("locust.uri", "URI of Locust.").Default("http://localhost:8089").Envar("locust_custom_exporter_URI").String()
		NameSpace     = kingpin.Flag("locust.namespace", "Namespace for prometheus metrics.").Default("locust").Envar("LOCUST_METRIC_NAMESPACE").String()
		timeout       = kingpin.Flag("locust.timeout", "Scrape timeout").Default("5s").Envar("locust_custom_exporter_TIMEOUT").Duration()
	)

	log.AddFlags(kingpin.CommandLine)
	kingpin.Version(version.Print("locust_exporter"))
	kingpin.HelpFlag.Short('h')
	kingpin.Parse()

	namespace = *NameSpace
	log.Infoln("Starting locust_custom_exporter", version.Info())
	log.Infoln("Build context", version.BuildContext())

	exporter, err := NewExporter(*uri, *timeout)
	if err != nil {
		log.Fatal(err)
	}
	prometheus.MustRegister(exporter)
	prometheus.MustRegister(version.NewCollector("locustexporter"))

	http.Handle(*metricsPath, promhttp.Handler())
	http.HandleFunc("/quitquitquit", func(http.ResponseWriter, *http.Request) { os.Exit(0) })
	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		_, _ = w.Write([]byte(`<html><head><title>Locust Exporter</title></head><body><h1>Locust Exporter</h1><p><a href='` + *metricsPath + `'>Metrics</a></p></body></html>`))
	})

	log.Infoln("Listening on", *listenAddress)
	log.Fatal(http.ListenAndServe(*listenAddress, nil))
}