fix crd example to satisfy kubernetes-sigs#319

Author: Mengqi Yu

examples/crd/controller.go

@@ -19,13 +19,10 @@ package main
 import (
 	"context"
 
-	"github.com/go-logr/logr"
-
 	appsv1 "k8s.io/api/apps/v1"
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-	"k8s.io/apimachinery/pkg/runtime"
 	"sigs.k8s.io/controller-runtime/examples/crd/pkg"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
@@ -65,28 +62,18 @@ func (r *FirstMateController) Reconcile(request reconcile.Request) (reconcile.Re
 	}
 
 	dep := &appsv1.Deployment{ObjectMeta: metav1.ObjectMeta{Name: request.Name, Namespace: request.Namespace}}
-	updateFn := (&createOrUpdateDeployment{firstMate: fm, log: fmLog}).do
-
-	_, err := controllerutil.CreateOrUpdate(ctx, r.client, dep, updateFn)
+	_, err := controllerutil.CreateOrUpdate(ctx, r.client, dep, func() error {
+		fmLog.Info("creating or updating deployment")
+		dep.Labels = fm.Labels
+		dep.Spec.Replicas = &fm.Spec.Crew
+		dep.Spec.Template.Labels = fm.Labels
+		dep.Spec.Selector.MatchLabels = fm.Labels
+		dep.Spec.Template.Spec.Containers = []corev1.Container{{Name: "nginx", Image: "nginx"}}
+		return nil
+	})
 	if err != nil {
 		return reconcile.Result{}, err
 	}
 
 	return reconcile.Result{}, nil
 }
-
-type createOrUpdateDeployment struct {
-	firstMate *pkg.FirstMate
-	log       logr.Logger
-}
-
-func (r *createOrUpdateDeployment) do(existing runtime.Object) error {
-	r.log.Info("creating or updating deployment")
-	dep := existing.(*appsv1.Deployment)
-	dep.Labels = r.firstMate.Labels
-	dep.Spec.Replicas = &r.firstMate.Spec.Crew
-	dep.Spec.Template.Labels = r.firstMate.Labels
-	dep.Spec.Selector.MatchLabels = r.firstMate.Labels
-	dep.Spec.Template.Spec.Containers = []corev1.Container{{Name: "nginx", Image: "nginx"}}
-	return nil
-}