build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/k8s.io/client-go/dynamic/dynamicinformer/informer.go

@@ -0,0 +1,188 @@
+/*
+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 dynamicinformer
+
+import (
+	"context"
+	"sync"
+	"time"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/watch"
+	"k8s.io/client-go/dynamic"
+	"k8s.io/client-go/dynamic/dynamiclister"
+	"k8s.io/client-go/informers"
+	"k8s.io/client-go/tools/cache"
+)
+
+// NewDynamicSharedInformerFactory constructs a new instance of dynamicSharedInformerFactory for all namespaces.
+func NewDynamicSharedInformerFactory(client dynamic.Interface, defaultResync time.Duration) DynamicSharedInformerFactory {
+	return NewFilteredDynamicSharedInformerFactory(client, defaultResync, metav1.NamespaceAll, nil)
+}
+
+// NewFilteredDynamicSharedInformerFactory constructs a new instance of dynamicSharedInformerFactory.
+// Listers obtained via this factory will be subject to the same filters as specified here.
+func NewFilteredDynamicSharedInformerFactory(client dynamic.Interface, defaultResync time.Duration, namespace string, tweakListOptions TweakListOptionsFunc) DynamicSharedInformerFactory {
+	return &dynamicSharedInformerFactory{
+		client:           client,
+		defaultResync:    defaultResync,
+		namespace:        namespace,
+		informers:        map[schema.GroupVersionResource]informers.GenericInformer{},
+		startedInformers: make(map[schema.GroupVersionResource]bool),
+		tweakListOptions: tweakListOptions,
+	}
+}
+
+type dynamicSharedInformerFactory struct {
+	client        dynamic.Interface
+	defaultResync time.Duration
+	namespace     string
+
+	lock      sync.Mutex
+	informers map[schema.GroupVersionResource]informers.GenericInformer
+	// startedInformers is used for tracking which informers have been started.
+	// This allows Start() to be called multiple times safely.
+	startedInformers map[schema.GroupVersionResource]bool
+	tweakListOptions TweakListOptionsFunc
+
+	// wg tracks how many goroutines were started.
+	wg sync.WaitGroup
+	// shuttingDown is true when Shutdown has been called. It may still be running
+	// because it needs to wait for goroutines.
+	shuttingDown bool
+}
+
+var _ DynamicSharedInformerFactory = &dynamicSharedInformerFactory{}
+
+func (f *dynamicSharedInformerFactory) ForResource(gvr schema.GroupVersionResource) informers.GenericInformer {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	key := gvr
+	informer, exists := f.informers[key]
+	if exists {
+		return informer
+	}
+
+	informer = NewFilteredDynamicInformer(f.client, gvr, f.namespace, f.defaultResync, cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}, f.tweakListOptions)
+	f.informers[key] = informer
+
+	return informer
+}
+
+// Start initializes all requested informers.
+func (f *dynamicSharedInformerFactory) Start(stopCh <-chan struct{}) {
+	f.lock.Lock()
+	defer f.lock.Unlock()
+
+	if f.shuttingDown {
+		return
+	}
+
+	for informerType, informer := range f.informers {
+		if !f.startedInformers[informerType] {
+			f.wg.Add(1)
+			// We need a new variable in each loop iteration,
+			// otherwise the goroutine would use the loop variable
+			// and that keeps changing.
+			informer := informer.Informer()
+			go func() {
+				defer f.wg.Done()
+				informer.Run(stopCh)
+			}()
+			f.startedInformers[informerType] = true
+		}
+	}
+}
+
+// WaitForCacheSync waits for all started informers' cache were synced.
+func (f *dynamicSharedInformerFactory) WaitForCacheSync(stopCh <-chan struct{}) map[schema.GroupVersionResource]bool {
+	informers := func() map[schema.GroupVersionResource]cache.SharedIndexInformer {
+		f.lock.Lock()
+		defer f.lock.Unlock()
+
+		informers := map[schema.GroupVersionResource]cache.SharedIndexInformer{}
+		for informerType, informer := range f.informers {
+			if f.startedInformers[informerType] {
+				informers[informerType] = informer.Informer()
+			}
+		}
+		return informers
+	}()
+
+	res := map[schema.GroupVersionResource]bool{}
+	for informType, informer := range informers {
+		res[informType] = cache.WaitForCacheSync(stopCh, informer.HasSynced)
+	}
+	return res
+}
+
+func (f *dynamicSharedInformerFactory) Shutdown() {
+	// Will return immediately if there is nothing to wait for.
+	defer f.wg.Wait()
+
+	f.lock.Lock()
+	defer f.lock.Unlock()
+	f.shuttingDown = true
+}
+
+// NewFilteredDynamicInformer constructs a new informer for a dynamic type.
+func NewFilteredDynamicInformer(client dynamic.Interface, gvr schema.GroupVersionResource, namespace string, resyncPeriod time.Duration, indexers cache.Indexers, tweakListOptions TweakListOptionsFunc) informers.GenericInformer {
+	return &dynamicInformer{
+		gvr: gvr,
+		informer: cache.NewSharedIndexInformerWithOptions(
+			&cache.ListWatch{
+				ListFunc: func(options metav1.ListOptions) (runtime.Object, error) {
+					if tweakListOptions != nil {
+						tweakListOptions(&options)
+					}
+					return client.Resource(gvr).Namespace(namespace).List(context.TODO(), options)
+				},
+				WatchFunc: func(options metav1.ListOptions) (watch.Interface, error) {
+					if tweakListOptions != nil {
+						tweakListOptions(&options)
+					}
+					return client.Resource(gvr).Namespace(namespace).Watch(context.TODO(), options)
+				},
+			},
+			&unstructured.Unstructured{},
+			cache.SharedIndexInformerOptions{
+				ResyncPeriod:      resyncPeriod,
+				Indexers:          indexers,
+				ObjectDescription: gvr.String(),
+			},
+		),
+	}
+}
+
+type dynamicInformer struct {
+	informer cache.SharedIndexInformer
+	gvr      schema.GroupVersionResource
+}
+
+var _ informers.GenericInformer = &dynamicInformer{}
+
+func (d *dynamicInformer) Informer() cache.SharedIndexInformer {
+	return d.informer
+}
+
+func (d *dynamicInformer) Lister() cache.GenericLister {
+	return dynamiclister.NewRuntimeObjectShim(dynamiclister.New(d.informer.GetIndexer(), d.gvr))
+}

e2e/vendor/k8s.io/client-go/dynamic/dynamicinformer/interface.go

@@ -0,0 +1,53 @@
+/*
+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 dynamicinformer
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/client-go/informers"
+)
+
+// DynamicSharedInformerFactory provides access to a shared informer and lister for dynamic client
+type DynamicSharedInformerFactory interface {
+	// Start initializes all requested informers. They are handled in goroutines
+	// which run until the stop channel gets closed.
+	Start(stopCh <-chan struct{})
+
+	// ForResource gives generic access to a shared informer of the matching type.
+	ForResource(gvr schema.GroupVersionResource) informers.GenericInformer
+
+	// WaitForCacheSync blocks until all started informers' caches were synced
+	// or the stop channel gets closed.
+	WaitForCacheSync(stopCh <-chan struct{}) map[schema.GroupVersionResource]bool
+
+	// Shutdown marks a factory as shutting down. At that point no new
+	// informers can be started anymore and Start will return without
+	// doing anything.
+	//
+	// In addition, Shutdown blocks until all goroutines have terminated. For that
+	// to happen, the close channel(s) that they were started with must be closed,
+	// either before Shutdown gets called or while it is waiting.
+	//
+	// Shutdown may be called multiple times, even concurrently. All such calls will
+	// block until all goroutines have terminated.
+	Shutdown()
+}
+
+// TweakListOptionsFunc defines the signature of a helper function
+// that wants to provide more listing options to API
+type TweakListOptionsFunc func(*metav1.ListOptions)