func main()

in main.go [56:137]
60 lines of code
7 McCabe index (conditional complexity)

func main() {
	var metricsAddr string
	var enableLeaderElection bool
	var probeAddr string
	flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.")
	flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.")
	flag.BoolVar(&enableLeaderElection, "leader-elect", false,
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")
	opts := zap.Options{
		Development: true,
	}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))

	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
		Scheme:                 scheme,
		MetricsBindAddress:     metricsAddr,
		Port:                   9443,
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       "7b2ac79d.azure-firewall-egress-controller.io",
		// LeaderElectionReleaseOnCancel defines if the leader should step down voluntarily
		// when the Manager ends. This requires the binary to immediately end when the
		// Manager is stopped, otherwise, this setting is unsafe. Setting this significantly
		// speeds up voluntary leader transitions as the new leader don't have to wait
		// LeaseDuration time first.
		//
		// In the default scaffold provided, the program ends immediately after
		// the manager stops, so would be fine to enable this option. However,
		// if you are doing or is intended to do any operation such as perform cleanups
		// after the manager stops then its usage might be unsafe.
		// LeaderElectionReleaseOnCancel: true,
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	env := environment.GetEnv()

	azClient := azure.NewAzClient(env.SubscriptionID, env.ResourceGroupName, env.FwPolicyName, env.FwPolicyRuleCollectionGroupName, env.FwPolicyRuleCollectionGroupPriority, env.ClientID, mgr.GetClient())

	var authorizer autorest.Authorizer
	authorizer, err = auth.NewAuthorizerFromEnvironment()
	azClient.SetAuthorizer(authorizer)

	firewallPolicyLoc := azClient.FetchFirewallPolicyLocation()

	klog.Infof("Azure Firewall Policy Details: Subscription=\"%s\" Resource Group=\"%s\" Location=\"%s\" Name=\"%s\" Rule Collection Group=\"%s\" Rule Collection Group Priority=\"%d\"", env.SubscriptionID, env.ResourceGroupName, firewallPolicyLoc, env.FwPolicyName, env.FwPolicyRuleCollectionGroupName, env.FwPolicyRuleCollectionGroupPriority)

	if err = (&controllers.AzureFirewallRulesReconciler{
		Client:   mgr.GetClient(),
		Scheme:   mgr.GetScheme(),
		AzClient: azClient,
	}).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "AzureFirewallRules")
		os.Exit(1)
	}
	if err = (&azurefirewallrulesv1.AzureFirewallRules{}).SetupWebhookWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create webhook", "webhook", "AzureFirewallRules")
		os.Exit(1)
	}
	//+kubebuilder:scaffold:builder

	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up health check")
		os.Exit(1)
	}
	if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil {
		setupLog.Error(err, "unable to set up ready check")
		os.Exit(1)
	}

	setupLog.Info("starting manager")
	if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil {
		setupLog.Error(err, "problem running manager")
		os.Exit(1)
	}
}