func main()

in cmd/manager/main.go [62:245]
150 lines of code
21 McCabe index (conditional complexity)

func main() {
	var (
		metricsAddr          string
		enableLeaderElection bool
		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", clusterUtil.RunningInCluster(),
		"Enable leader election for controller manager. "+
			"Enabling this will ensure there is only one active controller manager.")

	mode, err := clusterUtil.GetDebugMode()
	if err != nil {
		setupLog.Error(err, "unable to get debug mode value")
		os.Exit(1)
	}

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

	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
	utilruntime.Must(jenkinsApiV1alpha1.AddToScheme(scheme))
	utilruntime.Must(jenkinsApiV1.AddToScheme(scheme))
	utilruntime.Must(cdPipeApi.AddToScheme(scheme))
	utilruntime.Must(codebaseApi.AddToScheme(scheme))
	utilruntime.Must(edpCompApi.AddToScheme(scheme))
	utilruntime.Must(gerritApi.AddToScheme(scheme))
	utilruntime.Must(keycloakApi.AddToScheme(scheme))

	v := buildInfo.Get()

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

	setupLog.Info("Starting the Jenkins 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,
	)

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

	cfg := ctrl.GetConfigOrDie()

	mgr, err := ctrl.NewManager(cfg, ctrl.Options{
		Scheme:                 scheme,
		MetricsBindAddress:     metricsAddr,
		HealthProbeBindAddress: probeAddr,
		Port:                   9443,
		LeaderElection:         enableLeaderElection,
		LeaderElectionID:       jenkinsOperatorLock,
		MapperProvider: func(c *rest.Config) (meta.RESTMapper, error) {
			return apiutil.NewDynamicRESTMapper(cfg)
		},
		Namespace: ns,
	})
	if err != nil {
		setupLog.Error(err, "unable to start manager")
		os.Exit(1)
	}

	cl, err := client.New(mgr.GetConfig(), client.Options{
		Scheme: mgr.GetScheme(),
		Mapper: mgr.GetRESTMapper(),
	})
	if err != nil {
		setupLog.Error(err, "unable to create uncached client")
		os.Exit(1)
	}

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

	cdStageJd := jenkinsdeployment.NewReconcileCDStageJenkinsDeployment(cl, mgr.GetScheme(), ctrlLog)

	if err = cdStageJd.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "cd-stage-jenkins-deployment")
		os.Exit(1)
	}

	env, err := helper.GetPlatformTypeEnv()
	if err != nil {
		setupLog.Error(err, "unable to get platform type env")
		os.Exit(1)
	}

	ps, err := platform.NewPlatformService(env, mgr.GetScheme(), cl)
	if err != nil {
		setupLog.Error(err, "unable to create platform service")
	}

	jenkinsCtrl := jenkins.NewReconcileJenkins(cl, mgr.GetScheme(), ctrlLog, ps)

	if err := jenkinsCtrl.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins")
		os.Exit(1)
	}

	jfCtrl := jenkinsFolder.NewReconcileJenkinsFolder(cl, mgr.GetScheme(), ctrlLog, ps)

	if err := jfCtrl.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins-folder")
		os.Exit(1)
	}

	jjCtrl := jenkinsJob.NewReconcileJenkinsJob(cl, mgr.GetScheme(), ctrlLog, ps)

	if err := jjCtrl.SetupWithManager(
		mgr,
		getMaxConcurrentReconciles(jenkinsJobMaxConcurrentReconcilesEnv),
	); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins-job")
		os.Exit(1)
	}

	jsCtrl := jenkinsscript.NewReconcileJenkinsScript(cl, mgr.GetScheme(), ctrlLog, ps)
	if err := jsCtrl.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins-script")
		os.Exit(1)
	}

	jsaCtrl := jenkinsserviceaccount.NewReconcileJenkinsServiceAccount(cl, mgr.GetScheme(), ctrlLog, ps)
	if err := jsaCtrl.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins-service-account")
		os.Exit(1)
	}

	jjbr := jenkins_jobbuildrun.NewReconciler(cl, ctrlLog, ps)
	if err := jjbr.SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins-job-build-run")
		os.Exit(1)
	}

	if err := jenkins_authorizationrole.NewReconciler(cl, ctrlLog, ps).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins-auth-role")
		os.Exit(1)
	}

	if err := jenkins_authorizationrolemapping.NewReconciler(cl, ctrlLog, ps).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins-auth-role")
		os.Exit(1)
	}

	if err := jenkinsagent.NewReconciler(cl, ctrlLog).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins-agent")
		os.Exit(1)
	}

	templatePath := defaultEnv(
		"TEMPLATES_PATH", path.Join(platformHelper.DefaultConfigsAbsolutePath, jenkinsService.DefaultTemplatesDirectory))

	if err := sharedLibrary.NewReconcile(cl, ctrlLog, ps, templatePath).SetupWithManager(mgr); err != nil {
		setupLog.Error(err, "unable to create controller", "controller", "jenkins-shared-libraries")
		os.Exit(1)
	}

	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)
	}
}