Reduce the boilerplate for setting up duck.InformerFactory's. (#896)

This augments the injection codegen with the capability to produce a duck.InformerFactory
attached to context for each type that we process.

Now a `duck.InformerFactory` for "Addressable" can be produced by "Get"ing it from the context.

This is triggered by placing `// +genduck` on the type that implements `duck.Implementable`.

apis/duck/patch_test.go

@@ -22,6 +22,8 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
 )
 
 func TestCreateMergePatch(t *testing.T) {
@@ -292,6 +294,18 @@ type PatchSpec struct {
 var _ Implementable = (*Patchable)(nil)
 var _ Populatable = (*Patch)(nil)
 
+func (*Patch) GetObjectKind() schema.ObjectKind {
+	return nil // not used
+}
+
+func (p *Patch) DeepCopyObject() runtime.Object {
+	return nil // not used
+}
+
+func (p *Patch) GetListType() runtime.Object {
+	return nil // not used
+}
+
 func (*Patchable) GetFullType() Populatable {
 	return &Patch{}
 }

apis/duck/scale_test.go

@@ -21,6 +21,8 @@ import (
 
 	appsv1 "k8s.io/api/apps/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
 
 	"knative.dev/pkg/apis/duck"
 )
@@ -47,6 +49,18 @@ var (
 	_ duck.Implementable = (*Scalable)(nil)
 )
 
+func (*Scalable) GetObjectKind() schema.ObjectKind {
+	return nil // not used
+}
+
+func (p *Scalable) DeepCopyObject() runtime.Object {
+	return nil // not used
+}
+
+func (p *Scalable) GetListType() runtime.Object {
+	return nil // not used
+}
+
 // GetFullType implements duck.Implementable
 func (*Scalable) GetFullType() duck.Populatable {
 	return &Scalable{}

apis/duck/v1/addressable_types.go

@@ -27,9 +27,11 @@ import (
 	"knative.dev/pkg/apis/duck"
 )
 
+// +genduck
+
 // Addressable provides a generic mechanism for a custom resource
 // definition to indicate a destination for message delivery.
-
+//
 // Addressable is the schema for the destination information. This is
 // typically stored in the object's `status`, as this information may
 // be generated by the controller.
@@ -44,7 +46,6 @@ var (
 	_ apis.Convertible = (*Addressable)(nil)
 )
 
-// +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // AddressableType is a skeleton type wrapping Addressable in the manner we expect

apis/duck/v1/podspec_types.go

@@ -25,11 +25,12 @@ import (
 	"knative.dev/pkg/apis/duck"
 )
 
+// +genduck
+
 // PodSpecable is implemented by types containing a PodTemplateSpec
 // in the manner of ReplicaSet, Deployment, DaemonSet, StatefulSet.
 type PodSpecable corev1.PodTemplateSpec
 
-// +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // WithPod is the shell that demonstrates how PodSpecable types wrap

apis/duck/v1/source_types.go

@@ -30,7 +30,7 @@ import (
 // Source is an Implementable "duck type".
 var _ duck.Implementable = (*Source)(nil)
 
-// +genclient
+// +genduck
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // Source is the minimum resource shape to adhere to the Source Specification.

apis/duck/v1/status_types.go

@@ -28,13 +28,14 @@ import (
 	"knative.dev/pkg/apis/duck"
 )
 
+// +genduck
+
 // Conditions is a simple wrapper around apis.Conditions to implement duck.Implementable.
 type Conditions apis.Conditions
 
 // Conditions is an Implementable "duck type".
 var _ duck.Implementable = (*Conditions)(nil)
 
-// +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // KResource is a skeleton type wrapping Conditions in the manner we expect

apis/duck/v1alpha1/addressable_types.go

@@ -29,9 +29,11 @@ import (
 	"knative.dev/pkg/apis/duck/v1beta1"
 )
 
+// +genduck
+
 // Addressable provides a generic mechanism for a custom resource
 // definition to indicate a destination for message delivery.
-
+//
 // Addressable is the schema for the destination information. This is
 // typically stored in the object's `status`, as this information may
 // be generated by the controller.
@@ -48,7 +50,6 @@ var (
 	_ apis.Convertible = (*Addressable)(nil)
 )
 
-// +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // AddressableType is a skeleton type wrapping Addressable in the manner we expect

apis/duck/v1alpha1/conditions_types.go

@@ -27,6 +27,8 @@ import (
 	"knative.dev/pkg/apis/duck"
 )
 
+// +genduck
+
 // Conditions is the schema for the conditions portion of the payload
 type Conditions []Condition
 
@@ -118,7 +120,6 @@ func (c *Condition) IsUnknown() bool {
 // Conditions is an Implementable "duck type".
 var _ duck.Implementable = (*Conditions)(nil)
 
-// +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // KResource is a skeleton type wrapping Conditions in the manner we expect

apis/duck/v1alpha1/legacy_targetable_types.go

@@ -24,6 +24,8 @@ import (
 	"knative.dev/pkg/apis/duck"
 )
 
+// +genduck
+
 // LegacyTargetable left around until we migrate to Addressable in the
 // dependent resources. Addressable has more structure in the way it
 // defines the fields. LegacyTargetable only assumed a single string
@@ -32,7 +34,7 @@ import (
 // This is to support existing resources until they migrate.
 //
 // Do not use this for anything new, use Addressable
-
+//
 // LegacyTargetable is the old schema for the addressable portion
 // of the payload
 //
@@ -44,7 +46,6 @@ type LegacyTargetable struct {
 // LegacyTargetable is an Implementable "duck type".
 var _ duck.Implementable = (*LegacyTargetable)(nil)
 
-// +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // LegacyTarget is a skeleton type wrapping LegacyTargetable in the manner we

apis/duck/v1alpha1/retired_targetable_types.go

@@ -24,6 +24,8 @@ import (
 	"knative.dev/pkg/apis/duck"
 )
 
+// +genduck
+
 // Targetable is an earlier version of the Callable interface.
 // Callable is a higher-level interface which implements Addressable
 // but further promises that the destination may synchronously return
@@ -31,7 +33,7 @@ import (
 //
 // Targetable implementations should instead implement Addressable and
 // include an `eventing.knative.dev/returns=any` annotation.
-
+//
 // Targetable is retired; implement Addressable for now.
 type Targetable struct {
 	DomainInternal string `json:"domainInternal,omitempty"`
@@ -40,7 +42,6 @@ type Targetable struct {
 // Targetable is an Implementable "duck type".
 var _ duck.Implementable = (*Targetable)(nil)
 
-// +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // Target is a skeleton type wrapping Targetable in the manner we expect

apis/duck/v1beta1/addressable_types.go

@@ -28,9 +28,11 @@ import (
 	v1 "knative.dev/pkg/apis/duck/v1"
 )
 
+// +genduck
+
 // Addressable provides a generic mechanism for a custom resource
 // definition to indicate a destination for message delivery.
-
+//
 // Addressable is the schema for the destination information. This is
 // typically stored in the object's `status`, as this information may
 // be generated by the controller.
@@ -45,7 +47,6 @@ var (
 	_ apis.Convertible = (*Addressable)(nil)
 )
 
-// +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // AddressableType is a skeleton type wrapping Addressable in the manner we expect

apis/duck/v1beta1/source_types.go

@@ -30,7 +30,7 @@ import (
 // Source is an Implementable "duck type".
 var _ duck.Implementable = (*Source)(nil)
 
-// +genclient
+// +genduck
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // Source is the minimum resource shape to adhere to the Source Specification.

apis/duck/v1beta1/status_types.go

@@ -28,13 +28,14 @@ import (
 	"knative.dev/pkg/apis/duck"
 )
 
+// +genduck
+
 // Conditions is a simple wrapper around apis.Conditions to implement duck.Implementable.
 type Conditions apis.Conditions
 
 // Conditions is an Implementable "duck type".
 var _ duck.Implementable = (*Conditions)(nil)
 
-// +genclient
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object
 
 // KResource is a skeleton type wrapping Conditions in the manner we expect

apis/duck/verify.go

@@ -20,6 +20,7 @@ import (
 	"encoding/json"
 	"fmt"
 
+	"knative.dev/pkg/apis"
 	"knative.dev/pkg/kmp"
 )
 
@@ -36,6 +37,8 @@ type Implementable interface {
 // duck type.  It will generally have TypeMeta, ObjectMeta, and a Status field
 // wrapping a Fooable field.
 type Populatable interface {
+	apis.Listable
+
 	// Populate fills in all possible fields, so that we can verify that
 	// they roundtrip properly through JSON.
 	Populate()

apis/duck/verify_test.go

@@ -19,6 +19,9 @@ package duck
 import (
 	"errors"
 	"testing"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
 )
 
 func TestMatches(t *testing.T) {
@@ -224,6 +227,18 @@ type FooStatus struct {
 var _ Implementable = (*Fooable)(nil)
 var _ Populatable = (*Foo)(nil)
 
+func (*Foo) GetObjectKind() schema.ObjectKind {
+	return nil // not used
+}
+
+func (p *Foo) DeepCopyObject() runtime.Object {
+	return nil // not used
+}
+
+func (p *Foo) GetListType() runtime.Object {
+	return nil // not used
+}
+
 func (*Fooable) GetFullType() Populatable {
 	return &Foo{}
 }
@@ -251,6 +266,18 @@ type BarStatus struct {
 var _ Implementable = (*Barable)(nil)
 var _ Populatable = (*Bar)(nil)
 
+func (*Bar) GetObjectKind() schema.ObjectKind {
+	return nil // not used
+}
+
+func (p *Bar) DeepCopyObject() runtime.Object {
+	return nil // not used
+}
+
+func (p *Bar) GetListType() runtime.Object {
+	return nil // not used
+}
+
 func (*Barable) GetFullType() Populatable {
 	return &Bar{}
 }
@@ -278,6 +305,18 @@ type SliceStatus struct {
 var _ Implementable = (*Sliceable)(nil)
 var _ Populatable = (*Slice)(nil)
 
+func (*Slice) GetObjectKind() schema.ObjectKind {
+	return nil // not used
+}
+
+func (p *Slice) DeepCopyObject() runtime.Object {
+	return nil // not used
+}
+
+func (p *Slice) GetListType() runtime.Object {
+	return nil // not used
+}
+
 func (*Sliceable) GetFullType() Populatable {
 	return &Slice{}
 }
@@ -298,6 +337,18 @@ type StringStatus struct {
 var _ Implementable = (*Stringable)(nil)
 var _ Populatable = (*String)(nil)
 
+func (*String) GetObjectKind() schema.ObjectKind {
+	return nil // not used
+}
+
+func (p *String) DeepCopyObject() runtime.Object {
+	return nil // not used
+}
+
+func (p *String) GetListType() runtime.Object {
+	return nil // not used
+}
+
 func (*Stringable) GetFullType() Populatable {
 	return &String{}
 }
@@ -316,6 +367,18 @@ type UnableToMarshal struct{}
 var _ Implementable = (*UnableToMarshal)(nil)
 var _ Populatable = (*UnableToMarshal)(nil)
 
+func (*UnableToMarshal) GetObjectKind() schema.ObjectKind {
+	return nil // not used
+}
+
+func (p *UnableToMarshal) DeepCopyObject() runtime.Object {
+	return nil // not used
+}
+
+func (p *UnableToMarshal) GetListType() runtime.Object {
+	return nil // not used
+}
+
 func (u *UnableToMarshal) GetFullType() Populatable {
 	return u
 }
@@ -334,6 +397,18 @@ type UnableToUnmarshal struct{}
 var _ Implementable = (*UnableToUnmarshal)(nil)
 var _ Populatable = (*UnableToUnmarshal)(nil)
 
+func (*UnableToUnmarshal) GetObjectKind() schema.ObjectKind {
+	return nil // not used
+}
+
+func (p *UnableToUnmarshal) DeepCopyObject() runtime.Object {
+	return nil // not used
+}
+
+func (p *UnableToUnmarshal) GetListType() runtime.Object {
+	return nil // not used
+}
+
 func (u *UnableToUnmarshal) GetFullType() Populatable {
 	return u
 }
@@ -354,6 +429,18 @@ type UnexportedFields struct {
 var _ Implementable = (*UnexportedFields)(nil)
 var _ Populatable = (*UnexportedFields)(nil)
 
+func (*UnexportedFields) GetObjectKind() schema.ObjectKind {
+	return nil // not used
+}
+
+func (p *UnexportedFields) DeepCopyObject() runtime.Object {
+	return nil // not used
+}
+
+func (p *UnexportedFields) GetListType() runtime.Object {
+	return nil // not used
+}
+
 func (u *UnexportedFields) GetFullType() Populatable {
 	return &UnexportedFields{}
 }

client/injection/ducks/duck/v1/addressable/addressable.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package addressable
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1 "knative.dev/pkg/apis/duck/v1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1.Addressable{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1/addressable/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	addressable "knative.dev/pkg/client/injection/ducks/duck/v1/addressable"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = addressable.Get
+
+func init() {
+	injection.Fake.RegisterDuck(addressable.WithDuck)
+}

client/injection/ducks/duck/v1/conditions/conditions.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package conditions
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1 "knative.dev/pkg/apis/duck/v1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1.Conditions{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1/conditions/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	conditions "knative.dev/pkg/client/injection/ducks/duck/v1/conditions"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = conditions.Get
+
+func init() {
+	injection.Fake.RegisterDuck(conditions.WithDuck)
+}

client/injection/ducks/duck/v1/podspecable/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	podspecable "knative.dev/pkg/client/injection/ducks/duck/v1/podspecable"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = podspecable.Get
+
+func init() {
+	injection.Fake.RegisterDuck(podspecable.WithDuck)
+}

client/injection/ducks/duck/v1/podspecable/podspecable.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package podspecable
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1 "knative.dev/pkg/apis/duck/v1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1.PodSpecable{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1/source/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	source "knative.dev/pkg/client/injection/ducks/duck/v1/source"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = source.Get
+
+func init() {
+	injection.Fake.RegisterDuck(source.WithDuck)
+}

client/injection/ducks/duck/v1/source/source.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package source
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1 "knative.dev/pkg/apis/duck/v1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1.Source{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1alpha1/addressable/addressable.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package addressable
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1alpha1 "knative.dev/pkg/apis/duck/v1alpha1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1alpha1.Addressable{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1alpha1/addressable/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	addressable "knative.dev/pkg/client/injection/ducks/duck/v1alpha1/addressable"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = addressable.Get
+
+func init() {
+	injection.Fake.RegisterDuck(addressable.WithDuck)
+}

client/injection/ducks/duck/v1alpha1/conditions/conditions.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package conditions
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1alpha1 "knative.dev/pkg/apis/duck/v1alpha1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1alpha1.Conditions{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1alpha1/conditions/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	conditions "knative.dev/pkg/client/injection/ducks/duck/v1alpha1/conditions"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = conditions.Get
+
+func init() {
+	injection.Fake.RegisterDuck(conditions.WithDuck)
+}

client/injection/ducks/duck/v1alpha1/legacytargetable/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	legacytargetable "knative.dev/pkg/client/injection/ducks/duck/v1alpha1/legacytargetable"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = legacytargetable.Get
+
+func init() {
+	injection.Fake.RegisterDuck(legacytargetable.WithDuck)
+}

client/injection/ducks/duck/v1alpha1/legacytargetable/legacytargetable.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package legacytargetable
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1alpha1 "knative.dev/pkg/apis/duck/v1alpha1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1alpha1.LegacyTargetable{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1alpha1/targetable/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	targetable "knative.dev/pkg/client/injection/ducks/duck/v1alpha1/targetable"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = targetable.Get
+
+func init() {
+	injection.Fake.RegisterDuck(targetable.WithDuck)
+}

client/injection/ducks/duck/v1alpha1/targetable/targetable.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package targetable
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1alpha1 "knative.dev/pkg/apis/duck/v1alpha1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1alpha1.Targetable{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1beta1/addressable/addressable.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package addressable
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1beta1 "knative.dev/pkg/apis/duck/v1beta1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1beta1.Addressable{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1beta1/addressable/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	addressable "knative.dev/pkg/client/injection/ducks/duck/v1beta1/addressable"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = addressable.Get
+
+func init() {
+	injection.Fake.RegisterDuck(addressable.WithDuck)
+}

client/injection/ducks/duck/v1beta1/conditions/conditions.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package conditions
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1beta1 "knative.dev/pkg/apis/duck/v1beta1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1beta1.Conditions{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

client/injection/ducks/duck/v1beta1/conditions/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	conditions "knative.dev/pkg/client/injection/ducks/duck/v1beta1/conditions"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = conditions.Get
+
+func init() {
+	injection.Fake.RegisterDuck(conditions.WithDuck)
+}

client/injection/ducks/duck/v1beta1/source/fake/fake.go

@@ -0,0 +1,30 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package fake
+
+import (
+	source "knative.dev/pkg/client/injection/ducks/duck/v1beta1/source"
+	injection "knative.dev/pkg/injection"
+)
+
+var Get = source.Get
+
+func init() {
+	injection.Fake.RegisterDuck(source.WithDuck)
+}

client/injection/ducks/duck/v1beta1/source/source.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2019 The Knative 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.
+*/
+
+// Code generated by injection-gen. DO NOT EDIT.
+
+package source
+
+import (
+	"context"
+
+	duck "knative.dev/pkg/apis/duck"
+	v1beta1 "knative.dev/pkg/apis/duck/v1beta1"
+	controller "knative.dev/pkg/controller"
+	injection "knative.dev/pkg/injection"
+	dynamicclient "knative.dev/pkg/injection/clients/dynamicclient"
+	logging "knative.dev/pkg/logging"
+)
+
+func init() {
+	injection.Default.RegisterDuck(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := dynamicclient.Get(ctx)
+	dif := &duck.CachedInformerFactory{
+		Delegate: &duck.TypedInformerFactory{
+			Client:       dc,
+			Type:         (&v1beta1.Source{}).GetFullType(),
+			ResyncPeriod: controller.GetResyncPeriod(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) duck.InformerFactory {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		logging.FromContext(ctx).Panic(
+			"Unable to fetch knative.dev/pkg/apis/duck.InformerFactory from context.")
+	}
+	return untyped.(duck.InformerFactory)
+}

codegen/cmd/injection-gen/generators/duck.go

@@ -0,0 +1,130 @@
+/*
+Copyright 2019 The Knative 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 generators
+
+import (
+	"io"
+
+	clientgentypes "k8s.io/code-generator/cmd/client-gen/types"
+	"k8s.io/gengo/generator"
+	"k8s.io/gengo/namer"
+	"k8s.io/gengo/types"
+	"k8s.io/klog"
+)
+
+// duckGenerator produces logic to register a duck.InformerFactory for a particular
+// type onto context.
+type duckGenerator struct {
+	generator.DefaultGen
+	outputPackage  string
+	groupVersion   clientgentypes.GroupVersion
+	groupGoName    string
+	typeToGenerate *types.Type
+	imports        namer.ImportTracker
+}
+
+var _ generator.Generator = (*duckGenerator)(nil)
+
+func (g *duckGenerator) Filter(c *generator.Context, t *types.Type) bool {
+	// Only process the type for this informer generator.
+	return t == g.typeToGenerate
+}
+
+func (g *duckGenerator) Namers(c *generator.Context) namer.NameSystems {
+	publicPluralNamer := &ExceptionNamer{
+		Exceptions: map[string]string{
+			// these exceptions are used to deconflict the generated code
+			// you can put your fully qualified package like
+			// to generate a name that doesn't conflict with your group.
+			// "k8s.io/apis/events/v1beta1.Event": "EventResource"
+		},
+		KeyFunc: func(t *types.Type) string {
+			return t.Name.Package + "." + t.Name.Name
+		},
+		Delegate: namer.NewPublicPluralNamer(map[string]string{
+			"Endpoints": "Endpoints",
+		}),
+	}
+
+	return namer.NameSystems{
+		"raw":          namer.NewRawNamer(g.outputPackage, g.imports),
+		"publicPlural": publicPluralNamer,
+	}
+}
+
+func (g *duckGenerator) Imports(c *generator.Context) (imports []string) {
+	imports = append(imports, g.imports.ImportLines()...)
+	return
+}
+
+func (g *duckGenerator) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
+	sw := generator.NewSnippetWriter(w, c, "{{", "}}")
+
+	klog.V(5).Infof("processing type %v", t)
+
+	m := map[string]interface{}{
+		"group":                     namer.IC(g.groupGoName),
+		"type":                      t,
+		"version":                   namer.IC(g.groupVersion.Version.String()),
+		"injectionRegisterDuck":     c.Universe.Type(types.Name{Package: "knative.dev/pkg/injection", Name: "Default.RegisterDuck"}),
+		"getResyncPeriod":           c.Universe.Type(types.Name{Package: "knative.dev/pkg/controller", Name: "GetResyncPeriod"}),
+		"dynamicGet":                c.Universe.Type(types.Name{Package: "knative.dev/pkg/injection/clients/dynamicclient", Name: "Get"}),
+		"duckTypedInformerFactory":  c.Universe.Type(types.Name{Package: "knative.dev/pkg/apis/duck", Name: "TypedInformerFactory"}),
+		"duckCachedInformerFactory": c.Universe.Type(types.Name{Package: "knative.dev/pkg/apis/duck", Name: "CachedInformerFactory"}),
+		"duckInformerFactory":       c.Universe.Type(types.Name{Package: "knative.dev/pkg/apis/duck", Name: "InformerFactory"}),
+		"loggingFromContext": c.Universe.Function(types.Name{
+			Package: "knative.dev/pkg/logging",
+			Name:    "FromContext",
+		}),
+	}
+
+	sw.Do(duckFactory, m)
+
+	return sw.Error()
+}
+
+var duckFactory = `
+func init() {
+	{{.injectionRegisterDuck|raw}}(WithDuck)
+}
+
+// Key is used for associating the Informer inside the context.Context.
+type Key struct{}
+
+func WithDuck(ctx context.Context) context.Context {
+	dc := {{.dynamicGet|raw}}(ctx)
+	dif := &{{.duckCachedInformerFactory|raw}}{
+		Delegate: &{{.duckTypedInformerFactory|raw}}{
+			Client:       dc,
+			Type:         (&{{.type|raw}}{}).GetFullType(),
+			ResyncPeriod: {{.getResyncPeriod|raw}}(ctx),
+			StopChannel:  ctx.Done(),
+		},
+	}
+	return context.WithValue(ctx, Key{}, dif)
+}
+
+// Get extracts the typed informer from the context.
+func Get(ctx context.Context) {{.duckInformerFactory|raw}} {
+	untyped := ctx.Value(Key{})
+	if untyped == nil {
+		{{.loggingFromContext|raw}}(ctx).Panic(
+			"Unable to fetch {{.duckInformerFactory}} from context.")
+	}
+	return untyped.({{.duckInformerFactory|raw}})
+}
+`

codegen/cmd/injection-gen/generators/fakeduck.go

@@ -0,0 +1,104 @@
+/*
+Copyright 2019 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 generators
+
+import (
+	"io"
+
+	clientgentypes "k8s.io/code-generator/cmd/client-gen/types"
+	"k8s.io/gengo/generator"
+	"k8s.io/gengo/namer"
+	"k8s.io/gengo/types"
+	"k8s.io/klog"
+)
+
+// fakeDuckGenerator produces a file of listers for a given GroupVersion and
+// type.
+type fakeDuckGenerator struct {
+	generator.DefaultGen
+	outputPackage string
+	imports       namer.ImportTracker
+
+	typeToGenerate   *types.Type
+	groupVersion     clientgentypes.GroupVersion
+	groupGoName      string
+	duckInjectionPkg string
+}
+
+var _ generator.Generator = (*fakeDuckGenerator)(nil)
+
+func (g *fakeDuckGenerator) Filter(c *generator.Context, t *types.Type) bool {
+	// Only process the type for this duck generator.
+	return t == g.typeToGenerate
+}
+
+func (g *fakeDuckGenerator) Namers(c *generator.Context) namer.NameSystems {
+	publicPluralNamer := &ExceptionNamer{
+		Exceptions: map[string]string{
+			// these exceptions are used to deconflict the generated code
+			// you can put your fully qualified package like
+			// to generate a name that doesn't conflict with your group.
+			// "k8s.io/apis/events/v1beta1.Event": "EventResource"
+		},
+		KeyFunc: func(t *types.Type) string {
+			return t.Name.Package + "." + t.Name.Name
+		},
+		Delegate: namer.NewPublicPluralNamer(map[string]string{
+			"Endpoints": "Endpoints",
+		}),
+	}
+
+	return namer.NameSystems{
+		"raw":          namer.NewRawNamer(g.outputPackage, g.imports),
+		"publicPlural": publicPluralNamer,
+	}
+}
+
+func (g *fakeDuckGenerator) Imports(c *generator.Context) (imports []string) {
+	imports = append(imports, g.imports.ImportLines()...)
+	return
+}
+
+func (g *fakeDuckGenerator) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
+	sw := generator.NewSnippetWriter(w, c, "{{", "}}")
+
+	klog.V(5).Infof("processing type %v", t)
+
+	m := map[string]interface{}{
+		"withDuck": c.Universe.Type(types.Name{Package: g.duckInjectionPkg, Name: "WithDuck"}),
+		"duckGet":  c.Universe.Function(types.Name{Package: g.duckInjectionPkg, Name: "Get"}),
+		"group":    namer.IC(g.groupGoName),
+		"type":     t,
+		"version":  namer.IC(g.groupVersion.Version.String()),
+		"injectionRegisterDuck": c.Universe.Function(types.Name{
+			Package: "knative.dev/pkg/injection",
+			Name:    "Fake.RegisterDuck",
+		}),
+	}
+
+	sw.Do(injectionFakeDuck, m)
+
+	return sw.Error()
+}
+
+var injectionFakeDuck = `
+var Get = {{.duckGet|raw}}
+
+func init() {
+	{{.injectionRegisterDuck|raw}}({{.withDuck|raw}})
+}
+`

codegen/cmd/injection-gen/generators/packages.go

@@ -48,22 +48,12 @@ func Packages(context *generator.Context, arguments *args.GeneratorArgs) generat
 	versionPackagePath := filepath.Join(arguments.OutputPackagePath)
 
 	var packageList generator.Packages
-	typesForGroupVersion := make(map[clientgentypes.GroupVersion][]*types.Type)
 
 	groupVersions := make(map[string]clientgentypes.GroupVersions)
 	groupGoNames := make(map[string]string)
 	for _, inputDir := range arguments.InputDirs {
 		p := context.Universe.Package(vendorless(inputDir))
 
-		objectMeta, _, err := objectMetaForPackage(p) // TODO: ignoring internal.
-		if err != nil {
-			klog.Fatal(err)
-		}
-		if objectMeta == nil {
-			// no types in this package had genclient
-			continue
-		}
-
 		var gv clientgentypes.GroupVersion
 		var targetGroupVersions map[string]clientgentypes.GroupVersions
 
@@ -95,22 +85,16 @@ func Packages(context *generator.Context, arguments *args.GeneratorArgs) generat
 		// Generate the informer factory and fake.
 		packageList = append(packageList, versionFactoryPackages(versionPackagePath, boilerplate, customArgs)...)
 
-		var typesToGenerate []*types.Type
+		var typesWithInformers []*types.Type
+		var duckTypes []*types.Type
 		for _, t := range p.Types {
-			tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
-			if !tags.GenerateClient || tags.NoVerbs || !tags.HasVerb("list") || !tags.HasVerb("watch") {
-				continue
+			tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
+			if tags.NeedsInformerInjection() {
+				typesWithInformers = append(typesWithInformers, t)
 			}
-
-			typesToGenerate = append(typesToGenerate, t)
-
-			if _, ok := typesForGroupVersion[gv]; !ok {
-				typesForGroupVersion[gv] = []*types.Type{}
+			if tags.NeedsDuckInjection() {
+				duckTypes = append(duckTypes, t)
 			}
-			typesForGroupVersion[gv] = append(typesForGroupVersion[gv], t)
-		}
-		if len(typesToGenerate) == 0 {
-			continue
 		}
 
 		groupVersionsEntry, ok := targetGroupVersions[groupPackageName]
@@ -123,34 +107,52 @@ func Packages(context *generator.Context, arguments *args.GeneratorArgs) generat
 		groupVersionsEntry.Versions = append(groupVersionsEntry.Versions, clientgentypes.PackageVersion{Version: gv.Version, Package: gvPackage})
 		targetGroupVersions[groupPackageName] = groupVersionsEntry
 
+		if len(typesWithInformers) != 0 {
 			orderer := namer.Orderer{Namer: namer.NewPrivateNamer(0)}
-		typesToGenerate = orderer.OrderTypes(typesToGenerate)
+			typesWithInformers = orderer.OrderTypes(typesWithInformers)
 
 			// Generate the informer and fake, for each type.
-		packageList = append(packageList, versionInformerPackages(versionPackagePath, groupPackageName, gv, groupGoNames[groupPackageName], boilerplate, typesToGenerate, customArgs)...)
+			packageList = append(packageList, versionInformerPackages(versionPackagePath, groupPackageName, gv, groupGoNames[groupPackageName], boilerplate, typesWithInformers, customArgs)...)
+		}
+
+		if len(duckTypes) != 0 {
+			orderer := namer.Orderer{Namer: namer.NewPrivateNamer(0)}
+			duckTypes = orderer.OrderTypes(duckTypes)
+
+			// Generate a duck-typed informer for each type.
+			packageList = append(packageList, versionDuckPackages(versionPackagePath, groupPackageName, gv, groupGoNames[groupPackageName], boilerplate, duckTypes, customArgs)...)
+		}
 	}
 
 	return packageList
 }
 
-// objectMetaForPackage returns the type of ObjectMeta used by package p.
-func objectMetaForPackage(p *types.Package) (*types.Type, bool, error) {
-	generatingForPackage := false
-	for _, t := range p.Types {
-		if !util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...)).GenerateClient {
-			continue
+// Tags represents a genclient configuration for a single type.
+type Tags struct {
+	util.Tags
+
+	GenerateDuck bool
+}
+
+func (t Tags) NeedsInformerInjection() bool {
+	return t.GenerateClient && !t.NoVerbs && t.HasVerb("list") && t.HasVerb("watch")
+}
+
+func (t Tags) NeedsDuckInjection() bool {
+	return t.GenerateDuck
+}
+
+// MustParseClientGenTags calls ParseClientGenTags but instead of returning error it panics.
+func MustParseClientGenTags(lines []string) Tags {
+	ret := Tags{
+		Tags: util.MustParseClientGenTags(lines),
 	}
-		generatingForPackage = true
-		for _, member := range t.Members {
-			if member.Name == "ObjectMeta" {
-				return member.Type, isInternal(member), nil
-			}
-		}
-	}
-	if generatingForPackage {
-		return nil, false, fmt.Errorf("unable to find ObjectMeta for any types in package %s", p.Path)
-	}
-	return nil, false, nil
+
+	values := types.ExtractCommentTags("+", lines)
+	// log.Printf("GOT values %v", values)
+	_, ret.GenerateDuck = values["genduck"]
+
+	return ret
 }
 
 // isInternal returns true if the tags for a member do not contain a json tag
@@ -193,8 +195,8 @@ func versionClientsPackages(basePackage string, boilerplate []byte, customArgs *
 			return generators
 		},
 		FilterFunc: func(c *generator.Context, t *types.Type) bool {
-			tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
-			return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
+			tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
+			return tags.NeedsInformerInjection()
 		},
 	})
 
@@ -219,8 +221,8 @@ func versionClientsPackages(basePackage string, boilerplate []byte, customArgs *
 			return generators
 		},
 		FilterFunc: func(c *generator.Context, t *types.Type) bool {
-			tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
-			return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
+			tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
+			return tags.NeedsInformerInjection()
 		},
 	})
 
@@ -252,8 +254,8 @@ func versionFactoryPackages(basePackage string, boilerplate []byte, customArgs *
 			return generators
 		},
 		FilterFunc: func(c *generator.Context, t *types.Type) bool {
-			tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
-			return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
+			tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
+			return tags.NeedsInformerInjection()
 		},
 	})
 
@@ -279,8 +281,8 @@ func versionFactoryPackages(basePackage string, boilerplate []byte, customArgs *
 			return generators
 		},
 		FilterFunc: func(c *generator.Context, t *types.Type) bool {
-			tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
-			return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
+			tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
+			return tags.NeedsInformerInjection()
 		},
 	})
 
@@ -323,8 +325,8 @@ func versionInformerPackages(basePackage string, groupPkgName string, gv clientg
 				return generators
 			},
 			FilterFunc: func(c *generator.Context, t *types.Type) bool {
-				tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
-				return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
+				tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
+				return tags.NeedsInformerInjection()
 			},
 		})
 
@@ -351,8 +353,75 @@ func versionInformerPackages(basePackage string, groupPkgName string, gv clientg
 				return generators
 			},
 			FilterFunc: func(c *generator.Context, t *types.Type) bool {
-				tags := util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
-				return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
+				tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
+				return tags.NeedsInformerInjection()
+			},
+		})
+	}
+	return vers
+}
+
+func versionDuckPackages(basePackage string, groupPkgName string, gv clientgentypes.GroupVersion, groupGoName string, boilerplate []byte, typesToGenerate []*types.Type, customArgs *informergenargs.CustomArgs) []generator.Package {
+	packagePath := filepath.Join(basePackage, "ducks", groupPkgName, strings.ToLower(gv.Version.NonEmpty()))
+
+	vers := make([]generator.Package, 0, len(typesToGenerate))
+
+	for _, t := range typesToGenerate {
+		// Fix for golang iterator bug.
+		t := t
+
+		packagePath := packagePath + "/" + strings.ToLower(t.Name.Name)
+
+		// Impl
+		vers = append(vers, &generator.DefaultPackage{
+			PackageName: strings.ToLower(t.Name.Name),
+			PackagePath: packagePath,
+			HeaderText:  boilerplate,
+			GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
+				// Impl
+				generators = append(generators, &duckGenerator{
+					DefaultGen: generator.DefaultGen{
+						OptionalName: strings.ToLower(t.Name.Name),
+					},
+					outputPackage:  packagePath,
+					groupVersion:   gv,
+					groupGoName:    groupGoName,
+					typeToGenerate: t,
+					imports:        generator.NewImportTracker(),
+				})
+
+				return generators
+			},
+			FilterFunc: func(c *generator.Context, t *types.Type) bool {
+				tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
+				return tags.NeedsDuckInjection()
+			},
+		})
+
+		// Fake
+		vers = append(vers, &generator.DefaultPackage{
+			PackageName: "fake",
+			PackagePath: packagePath + "/fake",
+			HeaderText:  boilerplate,
+			GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
+				// Impl
+				generators = append(generators, &fakeDuckGenerator{
+					DefaultGen: generator.DefaultGen{
+						OptionalName: "fake",
+					},
+					outputPackage:    packagePath + "/fake",
+					imports:          generator.NewImportTracker(),
+					typeToGenerate:   t,
+					groupVersion:     gv,
+					groupGoName:      groupGoName,
+					duckInjectionPkg: packagePath,
+				})
+
+				return generators
+			},
+			FilterFunc: func(c *generator.Context, t *types.Type) bool {
+				tags := MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
+				return tags.NeedsDuckInjection()
 			},
 		})
 	}

hack/update-codegen.sh

@@ -36,7 +36,7 @@ ${CODEGEN_PKG}/generate-groups.sh "deepcopy,client,informer,lister" \
 # Knative Injection
 ${REPO_ROOT_DIR}/hack/generate-knative.sh "injection" \
   knative.dev/pkg/client knative.dev/pkg/apis \
-  "istio:v1alpha3 istio/authentication:v1alpha1" \
+  "istio:v1alpha3 istio/authentication:v1alpha1 duck:v1alpha1,v1beta1,v1" \
   --go-header-file ${REPO_ROOT_DIR}/hack/boilerplate/boilerplate.go.txt
 
 OUTPUT_PKG="knative.dev/pkg/client/injection/kube" \

injection/ducks.go

@@ -0,0 +1,40 @@
+/*
+Copyright 2019 The Knative 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 injection
+
+import (
+	"context"
+)
+
+// DuckFactoryInjector holds the type of a callback that attaches a particular
+// duck-type informer factory to a context.
+type DuckFactoryInjector func(context.Context) context.Context
+
+func (i *impl) RegisterDuck(ii DuckFactoryInjector) {
+	i.m.Lock()
+	defer i.m.Unlock()
+
+	i.ducks = append(i.ducks, ii)
+}
+
+func (i *impl) GetDucks() []DuckFactoryInjector {
+	i.m.RLock()
+	defer i.m.RUnlock()
+
+	// Copy the slice before returning.
+	return append(i.ducks[:0:0], i.ducks...)
+}

injection/informers.go

@@ -56,6 +56,12 @@ func (i *impl) SetupInformers(ctx context.Context, cfg *rest.Config) (context.Co
 		ctx = ifi(ctx)
 	}
 
+	// Based on the reconcilers we have linked, build up a set of duck informer factories
+	// and inject them onto the context.
+	for _, duck := range i.GetDucks() {
+		ctx = duck(ctx)
+	}
+
 	// Based on the reconcilers we have linked, build up a set of informers
 	// and inject them onto the context.
 	var inf controller.Informer

injection/interface.go

@@ -43,6 +43,12 @@ type Interface interface {
 	// GetInformerFactories fetches all of the registered informer factory injectors.
 	GetInformerFactories() []InformerFactoryInjector
 
+	// RegisterDuck registers a new duck.InformerFactory for a particular type.
+	RegisterDuck(ii DuckFactoryInjector)
+
+	// GetDucks accesses the set of registered ducks.
+	GetDucks() []DuckFactoryInjector
+
 	// RegisterInformer registers a new injector callback for associating
 	// a new informer with a context.
 	RegisterInformer(InformerInjector)
@@ -81,4 +87,5 @@ type impl struct {
 	clients   []ClientInjector
 	factories []InformerFactoryInjector
 	informers []InformerInjector
+	ducks     []DuckFactoryInjector
 }

resolver/addressable_resolver.go

@@ -32,7 +32,7 @@ import (
 	"knative.dev/pkg/network"
 	"knative.dev/pkg/tracker"
 
-	"knative.dev/pkg/injection/clients/dynamicclient"
+	"knative.dev/pkg/client/injection/ducks/duck/v1beta1/addressable"
 )
 
 // URIResolver resolves Destinations and ObjectReferences into a URI.
@@ -48,12 +48,7 @@ func NewURIResolver(ctx context.Context, callback func(types.NamespacedName)) *U
 	ret.tracker = tracker.New(callback, controller.GetTrackerLease(ctx))
 	ret.informerFactory = &pkgapisduck.CachedInformerFactory{
 		Delegate: &pkgapisduck.EnqueueInformerFactory{
-			Delegate: &pkgapisduck.TypedInformerFactory{
-				Client:       dynamicclient.Get(ctx),
-				Type:         &duckv1beta1.AddressableType{},
-				ResyncPeriod: controller.GetResyncPeriod(ctx),
-				StopChannel:  ctx.Done(),
-			},
+			Delegate:     addressable.Get(ctx),
 			EventHandler: controller.HandleAll(ret.tracker.OnChanged),
 		},
 	}

resolver/addressable_resolver_test.go

@@ -30,6 +30,7 @@ import (
 	"knative.dev/pkg/apis"
 	duckv1alpha1 "knative.dev/pkg/apis/duck/v1alpha1"
 	duckv1beta1 "knative.dev/pkg/apis/duck/v1beta1"
+	"knative.dev/pkg/client/injection/ducks/duck/v1beta1/addressable"
 	fakedynamicclient "knative.dev/pkg/injection/clients/dynamicclient/fake"
 	"knative.dev/pkg/resolver"
 )
@@ -332,6 +333,7 @@ func TestGetURI_ObjectReference(t *testing.T) {
 	for n, tc := range tests {
 		t.Run(n, func(t *testing.T) {
 			ctx, _ := fakedynamicclient.With(context.Background(), scheme.Scheme, tc.objects...)
+			ctx = addressable.WithDuck(ctx)
 			r := resolver.NewURIResolver(ctx, func(types.NamespacedName) {})
 
 			// Run it twice since this should be idempotent. URI Resolver should