func main()

in main.go [60:234]
138 lines of code
18 McCabe index (conditional complexity)

func main() {
	var (
		metricsAddr          string
		enableLeaderElection bool
		probeAddr            string
		secureMetrics        bool
		enableHTTP2          bool
	)

	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.")
	flag.BoolVar(&secureMetrics, "metrics-secure", false,
		"If set the metrics endpoint is served securely")
	flag.BoolVar(&enableHTTP2, "enable-http2", false,
		"If set, HTTP/2 will be enabled for the metrics and webhook servers")

	opts := zap.Options{
		Development: true,
	}
	opts.BindFlags(flag.CommandLine)
	flag.Parse()

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

	v := buildInfo.Get()

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

	// if the enable-http2 flag is false (the default), http/2 should be disabled
	// due to its vulnerabilities. More specifically, disabling http/2 will
	// prevent from being vulnerable to the HTTP/2 Stream Cancelation and
	// Rapid Reset CVEs. For more information see:
	// - https://github.com/advisories/GHSA-qppj-fm5r-hxr3
	// - https://github.com/advisories/GHSA-4374-p667-p6c8
	disableHTTP2 := func(c *tls.Config) {
		setupLog.Info("disabling http/2")

		c.NextProtos = []string{"http/1.1"}
	}

	var tlsOpts []func(*tls.Config)
	if !enableHTTP2 {
		tlsOpts = append(tlsOpts, disableHTTP2)
	}

	setupLog.Info("Starting the Codebase Operator",
		"version", v.Version,
		"git-commit", v.GitCommit,
		"git-tag", v.GitTag,
		"build-date", v.BuildDate,
		"go-version", v.Go,
		"go-client", v.KubectlVersion,
		"platform", v.Platform,
	)

	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(codebaseApiV1.AddToScheme(scheme))
	utilruntime.Must(cdPipeApi.AddToScheme(scheme))
	utilruntime.Must(networkingV1.AddToScheme(scheme))
	utilruntime.Must(routeApi.AddToScheme(scheme))
	utilruntime.Must(tektonTriggersApi.AddToScheme(scheme))
	utilruntime.Must(tektonpipelineApi.AddToScheme(scheme))

	ns, err := util.GetWatchNamespace()
	if err != nil {
		setupLog.Error(err, "failed to get watch namespace")
		os.Exit(1)
	}

	cfg := ctrl.GetConfigOrDie()

	mgr, err := ctrl.NewManager(cfg, ctrl.Options{
		Scheme: scheme,
		Metrics: metricsserver.Options{
			BindAddress:   metricsAddr,
			SecureServing: secureMetrics,
			TLSOpts:       tlsOpts,
		},
		HealthProbeBindAddress: probeAddr,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       codebaseOperatorLock,
		Cache: cache.Options{
			DefaultNamespaces: map[string]cache.Config{ns: {}},
		},
	})
	if err != nil {
		setupLog.Error(err, "failed to start manager")
		os.Exit(1)
	}

	ctrlLog := ctrl.Log.WithName("controllers")

	cdStageDeployCtrl := cdstagedeploy.NewReconcileCDStageDeploy(mgr.GetClient(), ctrlLog, chain.CreateChain)
	if err = cdStageDeployCtrl.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "failed to create controller", "controller", "cd-stage-deploy")
		os.Exit(1)
	}

	codebaseCtrl := codebase.NewReconcileCodebase(mgr.GetClient(), mgr.GetScheme(), ctrlLog)
	if err = codebaseCtrl.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "failed to create controller", "controller", "codebase")
		os.Exit(1)
	}

	cbCtrl := codebasebranch.NewReconcileCodebaseBranch(mgr.GetClient(), mgr.GetScheme(), ctrlLog)
	if err = cbCtrl.SetupWithManager(mgr,
		getMaxConcurrentReconciles(codebaseBranchMaxConcurrentReconcilesEnv)); err != nil {
		setupLog.Error(err, logFailCtrlCreateMessage, "controller", "codebase-branch")
		os.Exit(1)
	}

	cisCtrl := codebaseimagestream.NewReconcileCodebaseImageStream(mgr.GetClient(), ctrlLog)
	if err = cisCtrl.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, logFailCtrlCreateMessage, "controller", "codebase-image-stream")
		os.Exit(1)
	}

	if err = gitserver.NewReconcileGitServer(mgr.GetClient()).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, logFailCtrlCreateMessage, "controller", "git-server")
		os.Exit(1)
	}

	jimCtrl := jiraissuemetadata.NewReconcileJiraIssueMetadata(mgr.GetClient(), mgr.GetScheme(), ctrlLog)
	if err = jimCtrl.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, logFailCtrlCreateMessage, "controller", "jira-issue-metadata")
		os.Exit(1)
	}

	jsCtrl := jiraserver.NewReconcileJiraServer(mgr.GetClient(), mgr.GetScheme(), ctrlLog)
	if err = jsCtrl.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, logFailCtrlCreateMessage, "controller", "jira-server")
		os.Exit(1)
	}

	if err = integrationsecret.NewReconcileIntegrationSecret(mgr.GetClient()).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, logFailCtrlCreateMessage, "controller", "integration-secret")
		os.Exit(1)
	}

	if os.Getenv("ENABLE_WEBHOOKS") != "false" {
		if err = webhook.RegisterValidationWebHook(context.Background(), mgr, ns); err != nil {
			setupLog.Error(err, "failed to create webhook", "webhook", "Codebase")
			os.Exit(1)
		}
	}

	//+kubebuilder:scaffold:builder

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

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

	setupLog.Info("starting manager")

	ctx := ctrl.SetupSignalHandler()

	telemetryEnabled, _ := strconv.ParseBool(os.Getenv("TELEMETRY_ENABLED"))
	if telemetryEnabled {
		go telemetry.NewCollector(ns, telemetryUrl, mgr.GetClient()).Start(ctx, getTelemetryDelay(), telemetrySendEvery)
	}

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