func main()

in adapter/main.go [51:83]

• 28 lines of code
• 4 McCabe index (conditional complexity)

func main() {
	logs.InitLogs()
	defer logs.FlushLogs()
	klog.InitFlags(nil)

	cmd := &Adapter{}

	cmd.OpenAPIConfig = genericapiserver.DefaultOpenAPIConfig(generatedopenapi.GetOpenAPIDefinitions, openapinamer.NewDefinitionNamer(apiserver.Scheme))
	cmd.OpenAPIConfig.Info.Title = "apache-skywalking-adapter"
	cmd.OpenAPIConfig.Info.Version = "1.0.0"

	cmd.Flags().StringVar(&cmd.Message, "msg", "starting adapter...", "startup message")
	cmd.Flags().StringVar(&cmd.BaseURL, "oap-addr", "http://oap:12800/graphql", "the address of OAP cluster")
	cmd.Flags().StringVar(&cmd.MetricRegex, "metric-filter-regex", "", "a regular expression to filter metrics retrieved from OAP cluster")
	cmd.Flags().StringVar(&cmd.Namespace, "namespace", "skywalking.apache.org", "a prefix to which metrics are appended. The format is 'namespace|metric_name'")
	cmd.Flags().DurationVar(&cmd.RefreshRegistryInterval, "refresh-interval", 10*time.Second,
		"the interval at which to update the cache of available metrics from OAP cluster")
	cmd.Flags().AddGoFlagSet(flag.CommandLine) // make sure we get the klog flags
	if err := cmd.Flags().Parse(os.Args); err != nil {
		klog.Fatalf("failed to parse arguments: %v", err)
	}

	p, err := swckprov.NewProvider(cmd.BaseURL, cmd.MetricRegex, cmd.RefreshRegistryInterval, cmd.Namespace)
	if err != nil {
		klog.Fatalf("unable to build p: %v", err)
	}
	cmd.WithExternalMetrics(p)

	klog.Infof(cmd.Message)
	if err := cmd.Run(wait.NeverStop); err != nil {
		klog.Fatalf("unable to run custom metrics adapter: %v", err)
	}
}