rebase: add controller runtime dependency

this commits add the controller runtime
and its dependency to the vendor.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/sigs.k8s.io/controller-runtime/pkg/handler/enqueue.go

@@ -0,0 +1,91 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package handler
+
+import (
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/util/workqueue"
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	logf "sigs.k8s.io/controller-runtime/pkg/internal/log"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+)
+
+var enqueueLog = logf.RuntimeLog.WithName("eventhandler").WithName("EnqueueRequestForObject")
+
+var _ EventHandler = &EnqueueRequestForObject{}
+
+// EnqueueRequestForObject enqueues a Request containing the Name and Namespace of the object that is the source of the Event.
+// (e.g. the created / deleted / updated objects Name and Namespace).  handler.EnqueueRequestForObject is used by almost all
+// Controllers that have associated Resources (e.g. CRDs) to reconcile the associated Resource.
+type EnqueueRequestForObject struct{}
+
+// Create implements EventHandler
+func (e *EnqueueRequestForObject) Create(evt event.CreateEvent, q workqueue.RateLimitingInterface) {
+	if evt.Meta == nil {
+		enqueueLog.Error(nil, "CreateEvent received with no metadata", "event", evt)
+		return
+	}
+	q.Add(reconcile.Request{NamespacedName: types.NamespacedName{
+		Name:      evt.Meta.GetName(),
+		Namespace: evt.Meta.GetNamespace(),
+	}})
+}
+
+// Update implements EventHandler
+func (e *EnqueueRequestForObject) Update(evt event.UpdateEvent, q workqueue.RateLimitingInterface) {
+	if evt.MetaOld != nil {
+		q.Add(reconcile.Request{NamespacedName: types.NamespacedName{
+			Name:      evt.MetaOld.GetName(),
+			Namespace: evt.MetaOld.GetNamespace(),
+		}})
+	} else {
+		enqueueLog.Error(nil, "UpdateEvent received with no old metadata", "event", evt)
+	}
+
+	if evt.MetaNew != nil {
+		q.Add(reconcile.Request{NamespacedName: types.NamespacedName{
+			Name:      evt.MetaNew.GetName(),
+			Namespace: evt.MetaNew.GetNamespace(),
+		}})
+	} else {
+		enqueueLog.Error(nil, "UpdateEvent received with no new metadata", "event", evt)
+	}
+}
+
+// Delete implements EventHandler
+func (e *EnqueueRequestForObject) Delete(evt event.DeleteEvent, q workqueue.RateLimitingInterface) {
+	if evt.Meta == nil {
+		enqueueLog.Error(nil, "DeleteEvent received with no metadata", "event", evt)
+		return
+	}
+	q.Add(reconcile.Request{NamespacedName: types.NamespacedName{
+		Name:      evt.Meta.GetName(),
+		Namespace: evt.Meta.GetNamespace(),
+	}})
+}
+
+// Generic implements EventHandler
+func (e *EnqueueRequestForObject) Generic(evt event.GenericEvent, q workqueue.RateLimitingInterface) {
+	if evt.Meta == nil {
+		enqueueLog.Error(nil, "GenericEvent received with no metadata", "event", evt)
+		return
+	}
+	q.Add(reconcile.Request{NamespacedName: types.NamespacedName{
+		Name:      evt.Meta.GetName(),
+		Namespace: evt.Meta.GetNamespace(),
+	}})
+}