add.go

// SPDX-FileCopyrightText: SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0

package seedfinalizer

import (
	"context"

	"k8s.io/apimachinery/pkg/types"
	"sigs.k8s.io/controller-runtime/pkg/builder"
	"sigs.k8s.io/controller-runtime/pkg/client"
	"sigs.k8s.io/controller-runtime/pkg/controller"
	"sigs.k8s.io/controller-runtime/pkg/handler"
	"sigs.k8s.io/controller-runtime/pkg/manager"
	"sigs.k8s.io/controller-runtime/pkg/predicate"
	"sigs.k8s.io/controller-runtime/pkg/reconcile"

	gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
	predicateutils "github.com/gardener/gardener/pkg/controllerutils/predicate"
)

// ControllerName is the name of this controller.
const ControllerName = "controllerregistration-seed-finalizer"

// AddToManager adds Reconciler to the given manager.
func (r *Reconciler) AddToManager(mgr manager.Manager) error {
	if r.Client == nil {
		r.Client = mgr.GetClient()
	}

	return builder.
		ControllerManagedBy(mgr).
		Named(ControllerName).
		For(&gardencorev1beta1.Seed{}, builder.WithPredicates(predicate.GenerationChangedPredicate{})).
		WithOptions(controller.Options{
			MaxConcurrentReconciles: 5,
		}).
		Watches(
			&gardencorev1beta1.ControllerInstallation{},
			handler.EnqueueRequestsFromMapFunc(r.MapControllerInstallationToSeed),
			builder.WithPredicates(predicateutils.ForEventTypes(predicateutils.Delete)),
		).
		Complete(r)
}

// MapControllerInstallationToSeed returns a reconcile.Request object for the seed specified in the .spec.seedRef.name field.
func (r *Reconciler) MapControllerInstallationToSeed(_ context.Context, obj client.Object) []reconcile.Request {
	controllerInstallation, ok := obj.(*gardencorev1beta1.ControllerInstallation)
	if !ok {
		return nil
	}

	return []reconcile.Request{{NamespacedName: types.NamespacedName{Name: controllerInstallation.Spec.SeedRef.Name}}}
}