mirror of https://github.com/knative/pkg.git
118 lines
3.7 KiB
Go
118 lines
3.7 KiB
Go
/*
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Copyright 2024 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package resolver
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import (
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"context"
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"fmt"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/client-go/tools/cache"
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corev1 "k8s.io/api/core/v1"
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apierrs "k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/api/meta"
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"knative.dev/pkg/client/injection/ducks/duck/v1/authstatus"
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"knative.dev/pkg/controller"
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pkgapisduck "knative.dev/pkg/apis/duck"
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duckv1 "knative.dev/pkg/apis/duck/v1"
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"knative.dev/pkg/tracker"
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)
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// AuthenticatableResolver resolves ObjectReferences into a AuthenticatableType.
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type AuthenticatableResolver struct {
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tracker tracker.Interface
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listerFactory func(schema.GroupVersionResource) (cache.GenericLister, error)
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}
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// NewAuthenticatableResolverFromTracker constructs a new AuthenticatableResolver with context and a tracker.
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func NewAuthenticatableResolverFromTracker(ctx context.Context, t tracker.Interface) *AuthenticatableResolver {
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ret := &AuthenticatableResolver{
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tracker: t,
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}
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informerFactory := &pkgapisduck.CachedInformerFactory{
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Delegate: &pkgapisduck.EnqueueInformerFactory{
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Delegate: authstatus.Get(ctx),
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EventHandler: controller.HandleAll(ret.tracker.OnChanged),
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},
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}
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ret.listerFactory = func(gvr schema.GroupVersionResource) (cache.GenericLister, error) {
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_, l, err := informerFactory.Get(ctx, gvr)
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return l, err
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}
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return ret
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}
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// AuthStatusFromObjectReference returns the AuthStatus from an object
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func (r *AuthenticatableResolver) AuthStatusFromObjectReference(ref *corev1.ObjectReference, parent interface{}) (*duckv1.AuthStatus, error) {
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if ref == nil {
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return nil, apierrs.NewBadRequest("ref is nil")
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}
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authenticatable, err := r.authenticatableFromObjectReference(ref, parent)
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if err != nil {
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return nil, fmt.Errorf("failed to get authenticatable %s/%s: %w", ref.Namespace, ref.Name, err)
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}
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if authenticatable.Status.Auth == nil {
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return nil, fmt.Errorf(".status.auth is missing in object %s/%s", ref.Namespace, ref.Name)
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}
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return authenticatable.Status.Auth, nil
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}
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// authenticatableFromObjectReference resolves an object reference into an AuthenticatableType
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func (r *AuthenticatableResolver) authenticatableFromObjectReference(ref *corev1.ObjectReference, parent interface{}) (*duckv1.AuthenticatableType, error) {
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if ref == nil {
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return nil, apierrs.NewBadRequest("ref is nil")
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}
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gvr, _ := meta.UnsafeGuessKindToResource(ref.GroupVersionKind())
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if err := r.tracker.TrackReference(tracker.Reference{
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APIVersion: ref.APIVersion,
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Kind: ref.Kind,
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Namespace: ref.Namespace,
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Name: ref.Name,
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}, parent); err != nil {
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return nil, fmt.Errorf("failed to track reference %s %s/%s: %w", gvr.String(), ref.Namespace, ref.Name, err)
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}
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lister, err := r.listerFactory(gvr)
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if err != nil {
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return nil, fmt.Errorf("failed to get lister for %s: %w", gvr.String(), err)
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}
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obj, err := lister.ByNamespace(ref.Namespace).Get(ref.Name)
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if err != nil {
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return nil, fmt.Errorf("failed to get object %s/%s: %w", ref.Namespace, ref.Name, err)
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}
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authenticatable, ok := obj.(*duckv1.AuthenticatableType)
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if !ok {
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return nil, apierrs.NewBadRequest(fmt.Sprintf("%s(%T) is not an AuthenticatableType", ref, ref))
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}
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// Do not modify informer copy.
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authenticatable = authenticatable.DeepCopy()
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return authenticatable, nil
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}
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