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_mapped.go

@@ -0,0 +1,105 @@
+/*
+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 (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/util/workqueue"
+	"sigs.k8s.io/controller-runtime/pkg/event"
+	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+	"sigs.k8s.io/controller-runtime/pkg/runtime/inject"
+)
+
+var _ EventHandler = &EnqueueRequestsFromMapFunc{}
+
+// EnqueueRequestsFromMapFunc enqueues Requests by running a transformation function that outputs a collection
+// of reconcile.Requests on each Event.  The reconcile.Requests may be for an arbitrary set of objects
+// defined by some user specified transformation of the source Event.  (e.g. trigger Reconciler for a set of objects
+// in response to a cluster resize event caused by adding or deleting a Node)
+//
+// EnqueueRequestsFromMapFunc is frequently used to fan-out updates from one object to one or more other
+// objects of a differing type.
+//
+// For UpdateEvents which contain both a new and old object, the transformation function is run on both
+// objects and both sets of Requests are enqueue.
+type EnqueueRequestsFromMapFunc struct {
+	// Mapper transforms the argument into a slice of keys to be reconciled
+	ToRequests Mapper
+}
+
+// Create implements EventHandler
+func (e *EnqueueRequestsFromMapFunc) Create(evt event.CreateEvent, q workqueue.RateLimitingInterface) {
+	e.mapAndEnqueue(q, MapObject{Meta: evt.Meta, Object: evt.Object})
+}
+
+// Update implements EventHandler
+func (e *EnqueueRequestsFromMapFunc) Update(evt event.UpdateEvent, q workqueue.RateLimitingInterface) {
+	e.mapAndEnqueue(q, MapObject{Meta: evt.MetaOld, Object: evt.ObjectOld})
+	e.mapAndEnqueue(q, MapObject{Meta: evt.MetaNew, Object: evt.ObjectNew})
+}
+
+// Delete implements EventHandler
+func (e *EnqueueRequestsFromMapFunc) Delete(evt event.DeleteEvent, q workqueue.RateLimitingInterface) {
+	e.mapAndEnqueue(q, MapObject{Meta: evt.Meta, Object: evt.Object})
+}
+
+// Generic implements EventHandler
+func (e *EnqueueRequestsFromMapFunc) Generic(evt event.GenericEvent, q workqueue.RateLimitingInterface) {
+	e.mapAndEnqueue(q, MapObject{Meta: evt.Meta, Object: evt.Object})
+}
+
+func (e *EnqueueRequestsFromMapFunc) mapAndEnqueue(q workqueue.RateLimitingInterface, object MapObject) {
+	for _, req := range e.ToRequests.Map(object) {
+		q.Add(req)
+	}
+}
+
+// EnqueueRequestsFromMapFunc can inject fields into the mapper.
+
+// InjectFunc implements inject.Injector.
+func (e *EnqueueRequestsFromMapFunc) InjectFunc(f inject.Func) error {
+	if f == nil {
+		return nil
+	}
+	return f(e.ToRequests)
+}
+
+// Mapper maps an object to a collection of keys to be enqueued
+type Mapper interface {
+	// Map maps an object
+	Map(MapObject) []reconcile.Request
+}
+
+// MapObject contains information from an event to be transformed into a Request.
+type MapObject struct {
+	// Meta is the meta data for an object from an event.
+	Meta metav1.Object
+
+	// Object is the object from an event.
+	Object runtime.Object
+}
+
+var _ Mapper = ToRequestsFunc(nil)
+
+// ToRequestsFunc implements Mapper using a function.
+type ToRequestsFunc func(MapObject) []reconcile.Request
+
+// Map implements Mapper
+func (m ToRequestsFunc) Map(i MapObject) []reconcile.Request {
+	return m(i)
+}