(feat) Add auto-discovery in k8s | Adarsh

vendor/k8s.io/apimachinery/pkg/api/meta/OWNERS

@@ -0,0 +1,27 @@
+# See the OWNERS docs at https://go.k8s.io/owners
+
+reviewers:
+- thockin
+- smarterclayton
+- wojtek-t
+- deads2k
+- brendandburns
+- derekwaynecarr
+- caesarxuchao
+- mikedanese
+- liggitt
+- nikhiljindal
+- gmarek
+- janetkuo
+- ncdc
+- eparis
+- dims
+- krousey
+- markturansky
+- fabioy
+- resouer
+- david-mcmahon
+- mfojtik
+- jianhuiz
+- feihujiang
+- ghodss

vendor/k8s.io/apimachinery/pkg/api/meta/doc.go

@@ -0,0 +1,19 @@
+/*
+Copyright 2014 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 meta provides functions for retrieving API metadata from objects
+// belonging to the Kubernetes API
+package meta // import "k8s.io/apimachinery/pkg/api/meta"

vendor/k8s.io/apimachinery/pkg/api/meta/errors.go

@@ -0,0 +1,121 @@
+/*
+Copyright 2014 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 meta
+
+import (
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/util/sets"
+)
+
+// AmbiguousResourceError is returned if the RESTMapper finds multiple matches for a resource
+type AmbiguousResourceError struct {
+	PartialResource schema.GroupVersionResource
+
+	MatchingResources []schema.GroupVersionResource
+	MatchingKinds     []schema.GroupVersionKind
+}
+
+func (e *AmbiguousResourceError) Error() string {
+	switch {
+	case len(e.MatchingKinds) > 0 && len(e.MatchingResources) > 0:
+		return fmt.Sprintf("%v matches multiple resources %v and kinds %v", e.PartialResource, e.MatchingResources, e.MatchingKinds)
+	case len(e.MatchingKinds) > 0:
+		return fmt.Sprintf("%v matches multiple kinds %v", e.PartialResource, e.MatchingKinds)
+	case len(e.MatchingResources) > 0:
+		return fmt.Sprintf("%v matches multiple resources %v", e.PartialResource, e.MatchingResources)
+	}
+	return fmt.Sprintf("%v matches multiple resources or kinds", e.PartialResource)
+}
+
+// AmbiguousKindError is returned if the RESTMapper finds multiple matches for a kind
+type AmbiguousKindError struct {
+	PartialKind schema.GroupVersionKind
+
+	MatchingResources []schema.GroupVersionResource
+	MatchingKinds     []schema.GroupVersionKind
+}
+
+func (e *AmbiguousKindError) Error() string {
+	switch {
+	case len(e.MatchingKinds) > 0 && len(e.MatchingResources) > 0:
+		return fmt.Sprintf("%v matches multiple resources %v and kinds %v", e.PartialKind, e.MatchingResources, e.MatchingKinds)
+	case len(e.MatchingKinds) > 0:
+		return fmt.Sprintf("%v matches multiple kinds %v", e.PartialKind, e.MatchingKinds)
+	case len(e.MatchingResources) > 0:
+		return fmt.Sprintf("%v matches multiple resources %v", e.PartialKind, e.MatchingResources)
+	}
+	return fmt.Sprintf("%v matches multiple resources or kinds", e.PartialKind)
+}
+
+func IsAmbiguousError(err error) bool {
+	if err == nil {
+		return false
+	}
+	switch err.(type) {
+	case *AmbiguousResourceError, *AmbiguousKindError:
+		return true
+	default:
+		return false
+	}
+}
+
+// NoResourceMatchError is returned if the RESTMapper can't find any match for a resource
+type NoResourceMatchError struct {
+	PartialResource schema.GroupVersionResource
+}
+
+func (e *NoResourceMatchError) Error() string {
+	return fmt.Sprintf("no matches for %v", e.PartialResource)
+}
+
+// NoKindMatchError is returned if the RESTMapper can't find any match for a kind
+type NoKindMatchError struct {
+	// GroupKind is the API group and kind that was searched
+	GroupKind schema.GroupKind
+	// SearchedVersions is the optional list of versions the search was restricted to
+	SearchedVersions []string
+}
+
+func (e *NoKindMatchError) Error() string {
+	searchedVersions := sets.NewString()
+	for _, v := range e.SearchedVersions {
+		searchedVersions.Insert(schema.GroupVersion{Group: e.GroupKind.Group, Version: v}.String())
+	}
+
+	switch len(searchedVersions) {
+	case 0:
+		return fmt.Sprintf("no matches for kind %q in group %q", e.GroupKind.Kind, e.GroupKind.Group)
+	case 1:
+		return fmt.Sprintf("no matches for kind %q in version %q", e.GroupKind.Kind, searchedVersions.List()[0])
+	default:
+		return fmt.Sprintf("no matches for kind %q in versions %q", e.GroupKind.Kind, searchedVersions.List())
+	}
+}
+
+func IsNoMatchError(err error) bool {
+	if err == nil {
+		return false
+	}
+	switch err.(type) {
+	case *NoResourceMatchError, *NoKindMatchError:
+		return true
+	default:
+		return false
+	}
+}

vendor/k8s.io/apimachinery/pkg/api/meta/firsthit_restmapper.go

@@ -0,0 +1,97 @@
+/*
+Copyright 2014 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 meta
+
+import (
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
+)
+
+// FirstHitRESTMapper is a wrapper for multiple RESTMappers which returns the
+// first successful result for the singular requests
+type FirstHitRESTMapper struct {
+	MultiRESTMapper
+}
+
+func (m FirstHitRESTMapper) String() string {
+	return fmt.Sprintf("FirstHitRESTMapper{\n\t%v\n}", m.MultiRESTMapper)
+}
+
+func (m FirstHitRESTMapper) ResourceFor(resource schema.GroupVersionResource) (schema.GroupVersionResource, error) {
+	errors := []error{}
+	for _, t := range m.MultiRESTMapper {
+		ret, err := t.ResourceFor(resource)
+		if err == nil {
+			return ret, nil
+		}
+		errors = append(errors, err)
+	}
+
+	return schema.GroupVersionResource{}, collapseAggregateErrors(errors)
+}
+
+func (m FirstHitRESTMapper) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
+	errors := []error{}
+	for _, t := range m.MultiRESTMapper {
+		ret, err := t.KindFor(resource)
+		if err == nil {
+			return ret, nil
+		}
+		errors = append(errors, err)
+	}
+
+	return schema.GroupVersionKind{}, collapseAggregateErrors(errors)
+}
+
+// RESTMapping provides the REST mapping for the resource based on the
+// kind and version. This implementation supports multiple REST schemas and
+// return the first match.
+func (m FirstHitRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error) {
+	errors := []error{}
+	for _, t := range m.MultiRESTMapper {
+		ret, err := t.RESTMapping(gk, versions...)
+		if err == nil {
+			return ret, nil
+		}
+		errors = append(errors, err)
+	}
+
+	return nil, collapseAggregateErrors(errors)
+}
+
+// collapseAggregateErrors returns the minimal errors.  it handles empty as nil, handles one item in a list
+// by returning the item, and collapses all NoMatchErrors to a single one (since they should all be the same)
+func collapseAggregateErrors(errors []error) error {
+	if len(errors) == 0 {
+		return nil
+	}
+	if len(errors) == 1 {
+		return errors[0]
+	}
+
+	allNoMatchErrors := true
+	for _, err := range errors {
+		allNoMatchErrors = allNoMatchErrors && IsNoMatchError(err)
+	}
+	if allNoMatchErrors {
+		return errors[0]
+	}
+
+	return utilerrors.NewAggregate(errors)
+}

vendor/k8s.io/apimachinery/pkg/api/meta/help.go

@@ -0,0 +1,218 @@
+/*
+Copyright 2015 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 meta
+
+import (
+	"fmt"
+	"reflect"
+
+	"k8s.io/apimachinery/pkg/conversion"
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+// IsListType returns true if the provided Object has a slice called Items
+func IsListType(obj runtime.Object) bool {
+	// if we're a runtime.Unstructured, check whether this is a list.
+	// TODO: refactor GetItemsPtr to use an interface that returns []runtime.Object
+	if unstructured, ok := obj.(runtime.Unstructured); ok {
+		return unstructured.IsList()
+	}
+
+	_, err := GetItemsPtr(obj)
+	return err == nil
+}
+
+// GetItemsPtr returns a pointer to the list object's Items member.
+// If 'list' doesn't have an Items member, it's not really a list type
+// and an error will be returned.
+// This function will either return a pointer to a slice, or an error, but not both.
+func GetItemsPtr(list runtime.Object) (interface{}, error) {
+	v, err := conversion.EnforcePtr(list)
+	if err != nil {
+		return nil, err
+	}
+
+	items := v.FieldByName("Items")
+	if !items.IsValid() {
+		return nil, fmt.Errorf("no Items field in %#v", list)
+	}
+	switch items.Kind() {
+	case reflect.Interface, reflect.Ptr:
+		target := reflect.TypeOf(items.Interface()).Elem()
+		if target.Kind() != reflect.Slice {
+			return nil, fmt.Errorf("items: Expected slice, got %s", target.Kind())
+		}
+		return items.Interface(), nil
+	case reflect.Slice:
+		return items.Addr().Interface(), nil
+	default:
+		return nil, fmt.Errorf("items: Expected slice, got %s", items.Kind())
+	}
+}
+
+// EachListItem invokes fn on each runtime.Object in the list. Any error immediately terminates
+// the loop.
+func EachListItem(obj runtime.Object, fn func(runtime.Object) error) error {
+	if unstructured, ok := obj.(runtime.Unstructured); ok {
+		return unstructured.EachListItem(fn)
+	}
+	// TODO: Change to an interface call?
+	itemsPtr, err := GetItemsPtr(obj)
+	if err != nil {
+		return err
+	}
+	items, err := conversion.EnforcePtr(itemsPtr)
+	if err != nil {
+		return err
+	}
+	len := items.Len()
+	if len == 0 {
+		return nil
+	}
+	takeAddr := false
+	if elemType := items.Type().Elem(); elemType.Kind() != reflect.Ptr && elemType.Kind() != reflect.Interface {
+		if !items.Index(0).CanAddr() {
+			return fmt.Errorf("unable to take address of items in %T for EachListItem", obj)
+		}
+		takeAddr = true
+	}
+
+	for i := 0; i < len; i++ {
+		raw := items.Index(i)
+		if takeAddr {
+			raw = raw.Addr()
+		}
+		switch item := raw.Interface().(type) {
+		case *runtime.RawExtension:
+			if err := fn(item.Object); err != nil {
+				return err
+			}
+		case runtime.Object:
+			if err := fn(item); err != nil {
+				return err
+			}
+		default:
+			obj, ok := item.(runtime.Object)
+			if !ok {
+				return fmt.Errorf("%v: item[%v]: Expected object, got %#v(%s)", obj, i, raw.Interface(), raw.Kind())
+			}
+			if err := fn(obj); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// ExtractList returns obj's Items element as an array of runtime.Objects.
+// Returns an error if obj is not a List type (does not have an Items member).
+func ExtractList(obj runtime.Object) ([]runtime.Object, error) {
+	itemsPtr, err := GetItemsPtr(obj)
+	if err != nil {
+		return nil, err
+	}
+	items, err := conversion.EnforcePtr(itemsPtr)
+	if err != nil {
+		return nil, err
+	}
+	list := make([]runtime.Object, items.Len())
+	for i := range list {
+		raw := items.Index(i)
+		switch item := raw.Interface().(type) {
+		case runtime.RawExtension:
+			switch {
+			case item.Object != nil:
+				list[i] = item.Object
+			case item.Raw != nil:
+				// TODO: Set ContentEncoding and ContentType correctly.
+				list[i] = &runtime.Unknown{Raw: item.Raw}
+			default:
+				list[i] = nil
+			}
+		case runtime.Object:
+			list[i] = item
+		default:
+			var found bool
+			if list[i], found = raw.Addr().Interface().(runtime.Object); !found {
+				return nil, fmt.Errorf("%v: item[%v]: Expected object, got %#v(%s)", obj, i, raw.Interface(), raw.Kind())
+			}
+		}
+	}
+	return list, nil
+}
+
+// objectSliceType is the type of a slice of Objects
+var objectSliceType = reflect.TypeOf([]runtime.Object{})
+
+// LenList returns the length of this list or 0 if it is not a list.
+func LenList(list runtime.Object) int {
+	itemsPtr, err := GetItemsPtr(list)
+	if err != nil {
+		return 0
+	}
+	items, err := conversion.EnforcePtr(itemsPtr)
+	if err != nil {
+		return 0
+	}
+	return items.Len()
+}
+
+// SetList sets the given list object's Items member have the elements given in
+// objects.
+// Returns an error if list is not a List type (does not have an Items member),
+// or if any of the objects are not of the right type.
+func SetList(list runtime.Object, objects []runtime.Object) error {
+	itemsPtr, err := GetItemsPtr(list)
+	if err != nil {
+		return err
+	}
+	items, err := conversion.EnforcePtr(itemsPtr)
+	if err != nil {
+		return err
+	}
+	if items.Type() == objectSliceType {
+		items.Set(reflect.ValueOf(objects))
+		return nil
+	}
+	slice := reflect.MakeSlice(items.Type(), len(objects), len(objects))
+	for i := range objects {
+		dest := slice.Index(i)
+		if dest.Type() == reflect.TypeOf(runtime.RawExtension{}) {
+			dest = dest.FieldByName("Object")
+		}
+
+		// check to see if you're directly assignable
+		if reflect.TypeOf(objects[i]).AssignableTo(dest.Type()) {
+			dest.Set(reflect.ValueOf(objects[i]))
+			continue
+		}
+
+		src, err := conversion.EnforcePtr(objects[i])
+		if err != nil {
+			return err
+		}
+		if src.Type().AssignableTo(dest.Type()) {
+			dest.Set(src)
+		} else if src.Type().ConvertibleTo(dest.Type()) {
+			dest.Set(src.Convert(dest.Type()))
+		} else {
+			return fmt.Errorf("item[%d]: can't assign or convert %v into %v", i, src.Type(), dest.Type())
+		}
+	}
+	items.Set(slice)
+	return nil
+}

vendor/k8s.io/apimachinery/pkg/api/meta/interfaces.go

@@ -0,0 +1,134 @@
+/*
+Copyright 2014 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 meta
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/types"
+)
+
+type ListMetaAccessor interface {
+	GetListMeta() List
+}
+
+// List lets you work with list metadata from any of the versioned or
+// internal API objects. Attempting to set or retrieve a field on an object that does
+// not support that field will be a no-op and return a default value.
+type List metav1.ListInterface
+
+// Type exposes the type and APIVersion of versioned or internal API objects.
+type Type metav1.Type
+
+// MetadataAccessor lets you work with object and list metadata from any of the versioned or
+// internal API objects. Attempting to set or retrieve a field on an object that does
+// not support that field (Name, UID, Namespace on lists) will be a no-op and return
+// a default value.
+//
+// MetadataAccessor exposes Interface in a way that can be used with multiple objects.
+type MetadataAccessor interface {
+	APIVersion(obj runtime.Object) (string, error)
+	SetAPIVersion(obj runtime.Object, version string) error
+
+	Kind(obj runtime.Object) (string, error)
+	SetKind(obj runtime.Object, kind string) error
+
+	Namespace(obj runtime.Object) (string, error)
+	SetNamespace(obj runtime.Object, namespace string) error
+
+	Name(obj runtime.Object) (string, error)
+	SetName(obj runtime.Object, name string) error
+
+	GenerateName(obj runtime.Object) (string, error)
+	SetGenerateName(obj runtime.Object, name string) error
+
+	UID(obj runtime.Object) (types.UID, error)
+	SetUID(obj runtime.Object, uid types.UID) error
+
+	SelfLink(obj runtime.Object) (string, error)
+	SetSelfLink(obj runtime.Object, selfLink string) error
+
+	Labels(obj runtime.Object) (map[string]string, error)
+	SetLabels(obj runtime.Object, labels map[string]string) error
+
+	Annotations(obj runtime.Object) (map[string]string, error)
+	SetAnnotations(obj runtime.Object, annotations map[string]string) error
+
+	Continue(obj runtime.Object) (string, error)
+	SetContinue(obj runtime.Object, c string) error
+
+	runtime.ResourceVersioner
+}
+
+type RESTScopeName string
+
+const (
+	RESTScopeNameNamespace RESTScopeName = "namespace"
+	RESTScopeNameRoot      RESTScopeName = "root"
+)
+
+// RESTScope contains the information needed to deal with REST resources that are in a resource hierarchy
+type RESTScope interface {
+	// Name of the scope
+	Name() RESTScopeName
+}
+
+// RESTMapping contains the information needed to deal with objects of a specific
+// resource and kind in a RESTful manner.
+type RESTMapping struct {
+	// Resource is the GroupVersionResource (location) for this endpoint
+	Resource schema.GroupVersionResource
+
+	// GroupVersionKind is the GroupVersionKind (data format) to submit to this endpoint
+	GroupVersionKind schema.GroupVersionKind
+
+	// Scope contains the information needed to deal with REST Resources that are in a resource hierarchy
+	Scope RESTScope
+}
+
+// RESTMapper allows clients to map resources to kind, and map kind and version
+// to interfaces for manipulating those objects. It is primarily intended for
+// consumers of Kubernetes compatible REST APIs as defined in docs/devel/api-conventions.md.
+//
+// The Kubernetes API provides versioned resources and object kinds which are scoped
+// to API groups. In other words, kinds and resources should not be assumed to be
+// unique across groups.
+//
+// TODO: split into sub-interfaces
+type RESTMapper interface {
+	// KindFor takes a partial resource and returns the single match.  Returns an error if there are multiple matches
+	KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error)
+
+	// KindsFor takes a partial resource and returns the list of potential kinds in priority order
+	KindsFor(resource schema.GroupVersionResource) ([]schema.GroupVersionKind, error)
+
+	// ResourceFor takes a partial resource and returns the single match.  Returns an error if there are multiple matches
+	ResourceFor(input schema.GroupVersionResource) (schema.GroupVersionResource, error)
+
+	// ResourcesFor takes a partial resource and returns the list of potential resource in priority order
+	ResourcesFor(input schema.GroupVersionResource) ([]schema.GroupVersionResource, error)
+
+	// RESTMapping identifies a preferred resource mapping for the provided group kind.
+	RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error)
+	// RESTMappings returns all resource mappings for the provided group kind if no
+	// version search is provided. Otherwise identifies a preferred resource mapping for
+	// the provided version(s).
+	RESTMappings(gk schema.GroupKind, versions ...string) ([]*RESTMapping, error)
+
+	ResourceSingularizer(resource string) (singular string, err error)
+}

vendor/k8s.io/apimachinery/pkg/api/meta/lazy.go

@@ -0,0 +1,104 @@
+/*
+Copyright 2017 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 meta
+
+import (
+	"sync"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// lazyObject defers loading the mapper and typer until necessary.
+type lazyObject struct {
+	loader func() (RESTMapper, error)
+
+	lock   sync.Mutex
+	loaded bool
+	err    error
+	mapper RESTMapper
+}
+
+// NewLazyObjectLoader handles unrecoverable errors when creating a RESTMapper / ObjectTyper by
+// returning those initialization errors when the interface methods are invoked. This defers the
+// initialization and any server calls until a client actually needs to perform the action.
+func NewLazyRESTMapperLoader(fn func() (RESTMapper, error)) RESTMapper {
+	obj := &lazyObject{loader: fn}
+	return obj
+}
+
+// init lazily loads the mapper and typer, returning an error if initialization has failed.
+func (o *lazyObject) init() error {
+	o.lock.Lock()
+	defer o.lock.Unlock()
+	if o.loaded {
+		return o.err
+	}
+	o.mapper, o.err = o.loader()
+	o.loaded = true
+	return o.err
+}
+
+var _ RESTMapper = &lazyObject{}
+
+func (o *lazyObject) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
+	if err := o.init(); err != nil {
+		return schema.GroupVersionKind{}, err
+	}
+	return o.mapper.KindFor(resource)
+}
+
+func (o *lazyObject) KindsFor(resource schema.GroupVersionResource) ([]schema.GroupVersionKind, error) {
+	if err := o.init(); err != nil {
+		return []schema.GroupVersionKind{}, err
+	}
+	return o.mapper.KindsFor(resource)
+}
+
+func (o *lazyObject) ResourceFor(input schema.GroupVersionResource) (schema.GroupVersionResource, error) {
+	if err := o.init(); err != nil {
+		return schema.GroupVersionResource{}, err
+	}
+	return o.mapper.ResourceFor(input)
+}
+
+func (o *lazyObject) ResourcesFor(input schema.GroupVersionResource) ([]schema.GroupVersionResource, error) {
+	if err := o.init(); err != nil {
+		return []schema.GroupVersionResource{}, err
+	}
+	return o.mapper.ResourcesFor(input)
+}
+
+func (o *lazyObject) RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error) {
+	if err := o.init(); err != nil {
+		return nil, err
+	}
+	return o.mapper.RESTMapping(gk, versions...)
+}
+
+func (o *lazyObject) RESTMappings(gk schema.GroupKind, versions ...string) ([]*RESTMapping, error) {
+	if err := o.init(); err != nil {
+		return nil, err
+	}
+	return o.mapper.RESTMappings(gk, versions...)
+}
+
+func (o *lazyObject) ResourceSingularizer(resource string) (singular string, err error) {
+	if err := o.init(); err != nil {
+		return "", err
+	}
+	return o.mapper.ResourceSingularizer(resource)
+}

vendor/k8s.io/apimachinery/pkg/api/meta/meta.go

@@ -0,0 +1,650 @@
+/*
+Copyright 2014 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 meta
+
+import (
+	"fmt"
+	"reflect"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	metav1beta1 "k8s.io/apimachinery/pkg/apis/meta/v1beta1"
+	"k8s.io/apimachinery/pkg/conversion"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/klog"
+)
+
+// errNotList is returned when an object implements the Object style interfaces but not the List style
+// interfaces.
+var errNotList = fmt.Errorf("object does not implement the List interfaces")
+
+var errNotCommon = fmt.Errorf("object does not implement the common interface for accessing the SelfLink")
+
+// CommonAccessor returns a Common interface for the provided object or an error if the object does
+// not provide List.
+func CommonAccessor(obj interface{}) (metav1.Common, error) {
+	switch t := obj.(type) {
+	case List:
+		return t, nil
+	case metav1.ListInterface:
+		return t, nil
+	case ListMetaAccessor:
+		if m := t.GetListMeta(); m != nil {
+			return m, nil
+		}
+		return nil, errNotCommon
+	case metav1.ListMetaAccessor:
+		if m := t.GetListMeta(); m != nil {
+			return m, nil
+		}
+		return nil, errNotCommon
+	case metav1.Object:
+		return t, nil
+	case metav1.ObjectMetaAccessor:
+		if m := t.GetObjectMeta(); m != nil {
+			return m, nil
+		}
+		return nil, errNotCommon
+	default:
+		return nil, errNotCommon
+	}
+}
+
+// ListAccessor returns a List interface for the provided object or an error if the object does
+// not provide List.
+// IMPORTANT: Objects are NOT a superset of lists. Do not use this check to determine whether an
+// object *is* a List.
+func ListAccessor(obj interface{}) (List, error) {
+	switch t := obj.(type) {
+	case List:
+		return t, nil
+	case metav1.ListInterface:
+		return t, nil
+	case ListMetaAccessor:
+		if m := t.GetListMeta(); m != nil {
+			return m, nil
+		}
+		return nil, errNotList
+	case metav1.ListMetaAccessor:
+		if m := t.GetListMeta(); m != nil {
+			return m, nil
+		}
+		return nil, errNotList
+	default:
+		return nil, errNotList
+	}
+}
+
+// errNotObject is returned when an object implements the List style interfaces but not the Object style
+// interfaces.
+var errNotObject = fmt.Errorf("object does not implement the Object interfaces")
+
+// Accessor takes an arbitrary object pointer and returns meta.Interface.
+// obj must be a pointer to an API type. An error is returned if the minimum
+// required fields are missing. Fields that are not required return the default
+// value and are a no-op if set.
+func Accessor(obj interface{}) (metav1.Object, error) {
+	switch t := obj.(type) {
+	case metav1.Object:
+		return t, nil
+	case metav1.ObjectMetaAccessor:
+		if m := t.GetObjectMeta(); m != nil {
+			return m, nil
+		}
+		return nil, errNotObject
+	default:
+		return nil, errNotObject
+	}
+}
+
+// AsPartialObjectMetadata takes the metav1 interface and returns a partial object.
+// TODO: consider making this solely a conversion action.
+func AsPartialObjectMetadata(m metav1.Object) *metav1beta1.PartialObjectMetadata {
+	switch t := m.(type) {
+	case *metav1.ObjectMeta:
+		return &metav1beta1.PartialObjectMetadata{ObjectMeta: *t}
+	default:
+		return &metav1beta1.PartialObjectMetadata{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:                       m.GetName(),
+				GenerateName:               m.GetGenerateName(),
+				Namespace:                  m.GetNamespace(),
+				SelfLink:                   m.GetSelfLink(),
+				UID:                        m.GetUID(),
+				ResourceVersion:            m.GetResourceVersion(),
+				Generation:                 m.GetGeneration(),
+				CreationTimestamp:          m.GetCreationTimestamp(),
+				DeletionTimestamp:          m.GetDeletionTimestamp(),
+				DeletionGracePeriodSeconds: m.GetDeletionGracePeriodSeconds(),
+				Labels:                     m.GetLabels(),
+				Annotations:                m.GetAnnotations(),
+				OwnerReferences:            m.GetOwnerReferences(),
+				Finalizers:                 m.GetFinalizers(),
+				ClusterName:                m.GetClusterName(),
+				Initializers:               m.GetInitializers(),
+				ManagedFields:              m.GetManagedFields(),
+			},
+		}
+	}
+}
+
+// TypeAccessor returns an interface that allows retrieving and modifying the APIVersion
+// and Kind of an in-memory internal object.
+// TODO: this interface is used to test code that does not have ObjectMeta or ListMeta
+// in round tripping (objects which can use apiVersion/kind, but do not fit the Kube
+// api conventions).
+func TypeAccessor(obj interface{}) (Type, error) {
+	if typed, ok := obj.(runtime.Object); ok {
+		return objectAccessor{typed}, nil
+	}
+	v, err := conversion.EnforcePtr(obj)
+	if err != nil {
+		return nil, err
+	}
+	t := v.Type()
+	if v.Kind() != reflect.Struct {
+		return nil, fmt.Errorf("expected struct, but got %v: %v (%#v)", v.Kind(), t, v.Interface())
+	}
+
+	typeMeta := v.FieldByName("TypeMeta")
+	if !typeMeta.IsValid() {
+		return nil, fmt.Errorf("struct %v lacks embedded TypeMeta type", t)
+	}
+	a := &genericAccessor{}
+	if err := extractFromTypeMeta(typeMeta, a); err != nil {
+		return nil, fmt.Errorf("unable to find type fields on %#v: %v", typeMeta, err)
+	}
+	return a, nil
+}
+
+type objectAccessor struct {
+	runtime.Object
+}
+
+func (obj objectAccessor) GetKind() string {
+	return obj.GetObjectKind().GroupVersionKind().Kind
+}
+
+func (obj objectAccessor) SetKind(kind string) {
+	gvk := obj.GetObjectKind().GroupVersionKind()
+	gvk.Kind = kind
+	obj.GetObjectKind().SetGroupVersionKind(gvk)
+}
+
+func (obj objectAccessor) GetAPIVersion() string {
+	return obj.GetObjectKind().GroupVersionKind().GroupVersion().String()
+}
+
+func (obj objectAccessor) SetAPIVersion(version string) {
+	gvk := obj.GetObjectKind().GroupVersionKind()
+	gv, err := schema.ParseGroupVersion(version)
+	if err != nil {
+		gv = schema.GroupVersion{Version: version}
+	}
+	gvk.Group, gvk.Version = gv.Group, gv.Version
+	obj.GetObjectKind().SetGroupVersionKind(gvk)
+}
+
+// NewAccessor returns a MetadataAccessor that can retrieve
+// or manipulate resource version on objects derived from core API
+// metadata concepts.
+func NewAccessor() MetadataAccessor {
+	return resourceAccessor{}
+}
+
+// resourceAccessor implements ResourceVersioner and SelfLinker.
+type resourceAccessor struct{}
+
+func (resourceAccessor) Kind(obj runtime.Object) (string, error) {
+	return objectAccessor{obj}.GetKind(), nil
+}
+
+func (resourceAccessor) SetKind(obj runtime.Object, kind string) error {
+	objectAccessor{obj}.SetKind(kind)
+	return nil
+}
+
+func (resourceAccessor) APIVersion(obj runtime.Object) (string, error) {
+	return objectAccessor{obj}.GetAPIVersion(), nil
+}
+
+func (resourceAccessor) SetAPIVersion(obj runtime.Object, version string) error {
+	objectAccessor{obj}.SetAPIVersion(version)
+	return nil
+}
+
+func (resourceAccessor) Namespace(obj runtime.Object) (string, error) {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return "", err
+	}
+	return accessor.GetNamespace(), nil
+}
+
+func (resourceAccessor) SetNamespace(obj runtime.Object, namespace string) error {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return err
+	}
+	accessor.SetNamespace(namespace)
+	return nil
+}
+
+func (resourceAccessor) Name(obj runtime.Object) (string, error) {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return "", err
+	}
+	return accessor.GetName(), nil
+}
+
+func (resourceAccessor) SetName(obj runtime.Object, name string) error {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return err
+	}
+	accessor.SetName(name)
+	return nil
+}
+
+func (resourceAccessor) GenerateName(obj runtime.Object) (string, error) {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return "", err
+	}
+	return accessor.GetGenerateName(), nil
+}
+
+func (resourceAccessor) SetGenerateName(obj runtime.Object, name string) error {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return err
+	}
+	accessor.SetGenerateName(name)
+	return nil
+}
+
+func (resourceAccessor) UID(obj runtime.Object) (types.UID, error) {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return "", err
+	}
+	return accessor.GetUID(), nil
+}
+
+func (resourceAccessor) SetUID(obj runtime.Object, uid types.UID) error {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return err
+	}
+	accessor.SetUID(uid)
+	return nil
+}
+
+func (resourceAccessor) SelfLink(obj runtime.Object) (string, error) {
+	accessor, err := CommonAccessor(obj)
+	if err != nil {
+		return "", err
+	}
+	return accessor.GetSelfLink(), nil
+}
+
+func (resourceAccessor) SetSelfLink(obj runtime.Object, selfLink string) error {
+	accessor, err := CommonAccessor(obj)
+	if err != nil {
+		return err
+	}
+	accessor.SetSelfLink(selfLink)
+	return nil
+}
+
+func (resourceAccessor) Labels(obj runtime.Object) (map[string]string, error) {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return nil, err
+	}
+	return accessor.GetLabels(), nil
+}
+
+func (resourceAccessor) SetLabels(obj runtime.Object, labels map[string]string) error {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return err
+	}
+	accessor.SetLabels(labels)
+	return nil
+}
+
+func (resourceAccessor) Annotations(obj runtime.Object) (map[string]string, error) {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return nil, err
+	}
+	return accessor.GetAnnotations(), nil
+}
+
+func (resourceAccessor) SetAnnotations(obj runtime.Object, annotations map[string]string) error {
+	accessor, err := Accessor(obj)
+	if err != nil {
+		return err
+	}
+	accessor.SetAnnotations(annotations)
+	return nil
+}
+
+func (resourceAccessor) ResourceVersion(obj runtime.Object) (string, error) {
+	accessor, err := CommonAccessor(obj)
+	if err != nil {
+		return "", err
+	}
+	return accessor.GetResourceVersion(), nil
+}
+
+func (resourceAccessor) SetResourceVersion(obj runtime.Object, version string) error {
+	accessor, err := CommonAccessor(obj)
+	if err != nil {
+		return err
+	}
+	accessor.SetResourceVersion(version)
+	return nil
+}
+
+func (resourceAccessor) Continue(obj runtime.Object) (string, error) {
+	accessor, err := ListAccessor(obj)
+	if err != nil {
+		return "", err
+	}
+	return accessor.GetContinue(), nil
+}
+
+func (resourceAccessor) SetContinue(obj runtime.Object, version string) error {
+	accessor, err := ListAccessor(obj)
+	if err != nil {
+		return err
+	}
+	accessor.SetContinue(version)
+	return nil
+}
+
+// extractFromOwnerReference extracts v to o. v is the OwnerReferences field of an object.
+func extractFromOwnerReference(v reflect.Value, o *metav1.OwnerReference) error {
+	if err := runtime.Field(v, "APIVersion", &o.APIVersion); err != nil {
+		return err
+	}
+	if err := runtime.Field(v, "Kind", &o.Kind); err != nil {
+		return err
+	}
+	if err := runtime.Field(v, "Name", &o.Name); err != nil {
+		return err
+	}
+	if err := runtime.Field(v, "UID", &o.UID); err != nil {
+		return err
+	}
+	var controllerPtr *bool
+	if err := runtime.Field(v, "Controller", &controllerPtr); err != nil {
+		return err
+	}
+	if controllerPtr != nil {
+		controller := *controllerPtr
+		o.Controller = &controller
+	}
+	var blockOwnerDeletionPtr *bool
+	if err := runtime.Field(v, "BlockOwnerDeletion", &blockOwnerDeletionPtr); err != nil {
+		return err
+	}
+	if blockOwnerDeletionPtr != nil {
+		block := *blockOwnerDeletionPtr
+		o.BlockOwnerDeletion = &block
+	}
+	return nil
+}
+
+// setOwnerReference sets v to o. v is the OwnerReferences field of an object.
+func setOwnerReference(v reflect.Value, o *metav1.OwnerReference) error {
+	if err := runtime.SetField(o.APIVersion, v, "APIVersion"); err != nil {
+		return err
+	}
+	if err := runtime.SetField(o.Kind, v, "Kind"); err != nil {
+		return err
+	}
+	if err := runtime.SetField(o.Name, v, "Name"); err != nil {
+		return err
+	}
+	if err := runtime.SetField(o.UID, v, "UID"); err != nil {
+		return err
+	}
+	if o.Controller != nil {
+		controller := *(o.Controller)
+		if err := runtime.SetField(&controller, v, "Controller"); err != nil {
+			return err
+		}
+	}
+	if o.BlockOwnerDeletion != nil {
+		block := *(o.BlockOwnerDeletion)
+		if err := runtime.SetField(&block, v, "BlockOwnerDeletion"); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// genericAccessor contains pointers to strings that can modify an arbitrary
+// struct and implements the Accessor interface.
+type genericAccessor struct {
+	namespace         *string
+	name              *string
+	generateName      *string
+	uid               *types.UID
+	apiVersion        *string
+	kind              *string
+	resourceVersion   *string
+	selfLink          *string
+	creationTimestamp *metav1.Time
+	deletionTimestamp **metav1.Time
+	labels            *map[string]string
+	annotations       *map[string]string
+	ownerReferences   reflect.Value
+	finalizers        *[]string
+}
+
+func (a genericAccessor) GetNamespace() string {
+	if a.namespace == nil {
+		return ""
+	}
+	return *a.namespace
+}
+
+func (a genericAccessor) SetNamespace(namespace string) {
+	if a.namespace == nil {
+		return
+	}
+	*a.namespace = namespace
+}
+
+func (a genericAccessor) GetName() string {
+	if a.name == nil {
+		return ""
+	}
+	return *a.name
+}
+
+func (a genericAccessor) SetName(name string) {
+	if a.name == nil {
+		return
+	}
+	*a.name = name
+}
+
+func (a genericAccessor) GetGenerateName() string {
+	if a.generateName == nil {
+		return ""
+	}
+	return *a.generateName
+}
+
+func (a genericAccessor) SetGenerateName(generateName string) {
+	if a.generateName == nil {
+		return
+	}
+	*a.generateName = generateName
+}
+
+func (a genericAccessor) GetUID() types.UID {
+	if a.uid == nil {
+		return ""
+	}
+	return *a.uid
+}
+
+func (a genericAccessor) SetUID(uid types.UID) {
+	if a.uid == nil {
+		return
+	}
+	*a.uid = uid
+}
+
+func (a genericAccessor) GetAPIVersion() string {
+	return *a.apiVersion
+}
+
+func (a genericAccessor) SetAPIVersion(version string) {
+	*a.apiVersion = version
+}
+
+func (a genericAccessor) GetKind() string {
+	return *a.kind
+}
+
+func (a genericAccessor) SetKind(kind string) {
+	*a.kind = kind
+}
+
+func (a genericAccessor) GetResourceVersion() string {
+	return *a.resourceVersion
+}
+
+func (a genericAccessor) SetResourceVersion(version string) {
+	*a.resourceVersion = version
+}
+
+func (a genericAccessor) GetSelfLink() string {
+	return *a.selfLink
+}
+
+func (a genericAccessor) SetSelfLink(selfLink string) {
+	*a.selfLink = selfLink
+}
+
+func (a genericAccessor) GetCreationTimestamp() metav1.Time {
+	return *a.creationTimestamp
+}
+
+func (a genericAccessor) SetCreationTimestamp(timestamp metav1.Time) {
+	*a.creationTimestamp = timestamp
+}
+
+func (a genericAccessor) GetDeletionTimestamp() *metav1.Time {
+	return *a.deletionTimestamp
+}
+
+func (a genericAccessor) SetDeletionTimestamp(timestamp *metav1.Time) {
+	*a.deletionTimestamp = timestamp
+}
+
+func (a genericAccessor) GetLabels() map[string]string {
+	if a.labels == nil {
+		return nil
+	}
+	return *a.labels
+}
+
+func (a genericAccessor) SetLabels(labels map[string]string) {
+	*a.labels = labels
+}
+
+func (a genericAccessor) GetAnnotations() map[string]string {
+	if a.annotations == nil {
+		return nil
+	}
+	return *a.annotations
+}
+
+func (a genericAccessor) SetAnnotations(annotations map[string]string) {
+	if a.annotations == nil {
+		emptyAnnotations := make(map[string]string)
+		a.annotations = &emptyAnnotations
+	}
+	*a.annotations = annotations
+}
+
+func (a genericAccessor) GetFinalizers() []string {
+	if a.finalizers == nil {
+		return nil
+	}
+	return *a.finalizers
+}
+
+func (a genericAccessor) SetFinalizers(finalizers []string) {
+	*a.finalizers = finalizers
+}
+
+func (a genericAccessor) GetOwnerReferences() []metav1.OwnerReference {
+	var ret []metav1.OwnerReference
+	s := a.ownerReferences
+	if s.Kind() != reflect.Ptr || s.Elem().Kind() != reflect.Slice {
+		klog.Errorf("expect %v to be a pointer to slice", s)
+		return ret
+	}
+	s = s.Elem()
+	// Set the capacity to one element greater to avoid copy if the caller later append an element.
+	ret = make([]metav1.OwnerReference, s.Len(), s.Len()+1)
+	for i := 0; i < s.Len(); i++ {
+		if err := extractFromOwnerReference(s.Index(i), &ret[i]); err != nil {
+			klog.Errorf("extractFromOwnerReference failed: %v", err)
+			return ret
+		}
+	}
+	return ret
+}
+
+func (a genericAccessor) SetOwnerReferences(references []metav1.OwnerReference) {
+	s := a.ownerReferences
+	if s.Kind() != reflect.Ptr || s.Elem().Kind() != reflect.Slice {
+		klog.Errorf("expect %v to be a pointer to slice", s)
+	}
+	s = s.Elem()
+	newReferences := reflect.MakeSlice(s.Type(), len(references), len(references))
+	for i := 0; i < len(references); i++ {
+		if err := setOwnerReference(newReferences.Index(i), &references[i]); err != nil {
+			klog.Errorf("setOwnerReference failed: %v", err)
+			return
+		}
+	}
+	s.Set(newReferences)
+}
+
+// extractFromTypeMeta extracts pointers to version and kind fields from an object
+func extractFromTypeMeta(v reflect.Value, a *genericAccessor) error {
+	if err := runtime.FieldPtr(v, "APIVersion", &a.apiVersion); err != nil {
+		return err
+	}
+	if err := runtime.FieldPtr(v, "Kind", &a.kind); err != nil {
+		return err
+	}
+	return nil
+}

vendor/k8s.io/apimachinery/pkg/api/meta/multirestmapper.go

@@ -0,0 +1,210 @@
+/*
+Copyright 2014 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 meta
+
+import (
+	"fmt"
+	"strings"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
+)
+
+// MultiRESTMapper is a wrapper for multiple RESTMappers.
+type MultiRESTMapper []RESTMapper
+
+func (m MultiRESTMapper) String() string {
+	nested := []string{}
+	for _, t := range m {
+		currString := fmt.Sprintf("%v", t)
+		splitStrings := strings.Split(currString, "\n")
+		nested = append(nested, strings.Join(splitStrings, "\n\t"))
+	}
+
+	return fmt.Sprintf("MultiRESTMapper{\n\t%s\n}", strings.Join(nested, "\n\t"))
+}
+
+// ResourceSingularizer converts a REST resource name from plural to singular (e.g., from pods to pod)
+// This implementation supports multiple REST schemas and return the first match.
+func (m MultiRESTMapper) ResourceSingularizer(resource string) (singular string, err error) {
+	for _, t := range m {
+		singular, err = t.ResourceSingularizer(resource)
+		if err == nil {
+			return
+		}
+	}
+	return
+}
+
+func (m MultiRESTMapper) ResourcesFor(resource schema.GroupVersionResource) ([]schema.GroupVersionResource, error) {
+	allGVRs := []schema.GroupVersionResource{}
+	for _, t := range m {
+		gvrs, err := t.ResourcesFor(resource)
+		// ignore "no match" errors, but any other error percolates back up
+		if IsNoMatchError(err) {
+			continue
+		}
+		if err != nil {
+			return nil, err
+		}
+
+		// walk the existing values to de-dup
+		for _, curr := range gvrs {
+			found := false
+			for _, existing := range allGVRs {
+				if curr == existing {
+					found = true
+					break
+				}
+			}
+
+			if !found {
+				allGVRs = append(allGVRs, curr)
+			}
+		}
+	}
+
+	if len(allGVRs) == 0 {
+		return nil, &NoResourceMatchError{PartialResource: resource}
+	}
+
+	return allGVRs, nil
+}
+
+func (m MultiRESTMapper) KindsFor(resource schema.GroupVersionResource) (gvk []schema.GroupVersionKind, err error) {
+	allGVKs := []schema.GroupVersionKind{}
+	for _, t := range m {
+		gvks, err := t.KindsFor(resource)
+		// ignore "no match" errors, but any other error percolates back up
+		if IsNoMatchError(err) {
+			continue
+		}
+		if err != nil {
+			return nil, err
+		}
+
+		// walk the existing values to de-dup
+		for _, curr := range gvks {
+			found := false
+			for _, existing := range allGVKs {
+				if curr == existing {
+					found = true
+					break
+				}
+			}
+
+			if !found {
+				allGVKs = append(allGVKs, curr)
+			}
+		}
+	}
+
+	if len(allGVKs) == 0 {
+		return nil, &NoResourceMatchError{PartialResource: resource}
+	}
+
+	return allGVKs, nil
+}
+
+func (m MultiRESTMapper) ResourceFor(resource schema.GroupVersionResource) (schema.GroupVersionResource, error) {
+	resources, err := m.ResourcesFor(resource)
+	if err != nil {
+		return schema.GroupVersionResource{}, err
+	}
+	if len(resources) == 1 {
+		return resources[0], nil
+	}
+
+	return schema.GroupVersionResource{}, &AmbiguousResourceError{PartialResource: resource, MatchingResources: resources}
+}
+
+func (m MultiRESTMapper) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
+	kinds, err := m.KindsFor(resource)
+	if err != nil {
+		return schema.GroupVersionKind{}, err
+	}
+	if len(kinds) == 1 {
+		return kinds[0], nil
+	}
+
+	return schema.GroupVersionKind{}, &AmbiguousResourceError{PartialResource: resource, MatchingKinds: kinds}
+}
+
+// RESTMapping provides the REST mapping for the resource based on the
+// kind and version. This implementation supports multiple REST schemas and
+// return the first match.
+func (m MultiRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error) {
+	allMappings := []*RESTMapping{}
+	errors := []error{}
+
+	for _, t := range m {
+		currMapping, err := t.RESTMapping(gk, versions...)
+		// ignore "no match" errors, but any other error percolates back up
+		if IsNoMatchError(err) {
+			continue
+		}
+		if err != nil {
+			errors = append(errors, err)
+			continue
+		}
+
+		allMappings = append(allMappings, currMapping)
+	}
+
+	// if we got exactly one mapping, then use it even if other requested failed
+	if len(allMappings) == 1 {
+		return allMappings[0], nil
+	}
+	if len(allMappings) > 1 {
+		var kinds []schema.GroupVersionKind
+		for _, m := range allMappings {
+			kinds = append(kinds, m.GroupVersionKind)
+		}
+		return nil, &AmbiguousKindError{PartialKind: gk.WithVersion(""), MatchingKinds: kinds}
+	}
+	if len(errors) > 0 {
+		return nil, utilerrors.NewAggregate(errors)
+	}
+	return nil, &NoKindMatchError{GroupKind: gk, SearchedVersions: versions}
+}
+
+// RESTMappings returns all possible RESTMappings for the provided group kind, or an error
+// if the type is not recognized.
+func (m MultiRESTMapper) RESTMappings(gk schema.GroupKind, versions ...string) ([]*RESTMapping, error) {
+	var allMappings []*RESTMapping
+	var errors []error
+
+	for _, t := range m {
+		currMappings, err := t.RESTMappings(gk, versions...)
+		// ignore "no match" errors, but any other error percolates back up
+		if IsNoMatchError(err) {
+			continue
+		}
+		if err != nil {
+			errors = append(errors, err)
+			continue
+		}
+		allMappings = append(allMappings, currMappings...)
+	}
+	if len(errors) > 0 {
+		return nil, utilerrors.NewAggregate(errors)
+	}
+	if len(allMappings) == 0 {
+		return nil, &NoKindMatchError{GroupKind: gk, SearchedVersions: versions}
+	}
+	return allMappings, nil
+}

vendor/k8s.io/apimachinery/pkg/api/meta/priority.go

@@ -0,0 +1,222 @@
+/*
+Copyright 2016 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 meta
+
+import (
+	"fmt"
+
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+const (
+	AnyGroup    = "*"
+	AnyVersion  = "*"
+	AnyResource = "*"
+	AnyKind     = "*"
+)
+
+// PriorityRESTMapper is a wrapper for automatically choosing a particular Resource or Kind
+// when multiple matches are possible
+type PriorityRESTMapper struct {
+	// Delegate is the RESTMapper to use to locate all the Kind and Resource matches
+	Delegate RESTMapper
+
+	// ResourcePriority is a list of priority patterns to apply to matching resources.
+	// The list of all matching resources is narrowed based on the patterns until only one remains.
+	// A pattern with no matches is skipped.  A pattern with more than one match uses its
+	// matches as the list to continue matching against.
+	ResourcePriority []schema.GroupVersionResource
+
+	// KindPriority is a list of priority patterns to apply to matching kinds.
+	// The list of all matching kinds is narrowed based on the patterns until only one remains.
+	// A pattern with no matches is skipped.  A pattern with more than one match uses its
+	// matches as the list to continue matching against.
+	KindPriority []schema.GroupVersionKind
+}
+
+func (m PriorityRESTMapper) String() string {
+	return fmt.Sprintf("PriorityRESTMapper{\n\t%v\n\t%v\n\t%v\n}", m.ResourcePriority, m.KindPriority, m.Delegate)
+}
+
+// ResourceFor finds all resources, then passes them through the ResourcePriority patterns to find a single matching hit.
+func (m PriorityRESTMapper) ResourceFor(partiallySpecifiedResource schema.GroupVersionResource) (schema.GroupVersionResource, error) {
+	originalGVRs, originalErr := m.Delegate.ResourcesFor(partiallySpecifiedResource)
+	if originalErr != nil && len(originalGVRs) == 0 {
+		return schema.GroupVersionResource{}, originalErr
+	}
+	if len(originalGVRs) == 1 {
+		return originalGVRs[0], originalErr
+	}
+
+	remainingGVRs := append([]schema.GroupVersionResource{}, originalGVRs...)
+	for _, pattern := range m.ResourcePriority {
+		matchedGVRs := []schema.GroupVersionResource{}
+		for _, gvr := range remainingGVRs {
+			if resourceMatches(pattern, gvr) {
+				matchedGVRs = append(matchedGVRs, gvr)
+			}
+		}
+
+		switch len(matchedGVRs) {
+		case 0:
+			// if you have no matches, then nothing matched this pattern just move to the next
+			continue
+		case 1:
+			// one match, return
+			return matchedGVRs[0], originalErr
+		default:
+			// more than one match, use the matched hits as the list moving to the next pattern.
+			// this way you can have a series of selection criteria
+			remainingGVRs = matchedGVRs
+		}
+	}
+
+	return schema.GroupVersionResource{}, &AmbiguousResourceError{PartialResource: partiallySpecifiedResource, MatchingResources: originalGVRs}
+}
+
+// KindFor finds all kinds, then passes them through the KindPriority patterns to find a single matching hit.
+func (m PriorityRESTMapper) KindFor(partiallySpecifiedResource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
+	originalGVKs, originalErr := m.Delegate.KindsFor(partiallySpecifiedResource)
+	if originalErr != nil && len(originalGVKs) == 0 {
+		return schema.GroupVersionKind{}, originalErr
+	}
+	if len(originalGVKs) == 1 {
+		return originalGVKs[0], originalErr
+	}
+
+	remainingGVKs := append([]schema.GroupVersionKind{}, originalGVKs...)
+	for _, pattern := range m.KindPriority {
+		matchedGVKs := []schema.GroupVersionKind{}
+		for _, gvr := range remainingGVKs {
+			if kindMatches(pattern, gvr) {
+				matchedGVKs = append(matchedGVKs, gvr)
+			}
+		}
+
+		switch len(matchedGVKs) {
+		case 0:
+			// if you have no matches, then nothing matched this pattern just move to the next
+			continue
+		case 1:
+			// one match, return
+			return matchedGVKs[0], originalErr
+		default:
+			// more than one match, use the matched hits as the list moving to the next pattern.
+			// this way you can have a series of selection criteria
+			remainingGVKs = matchedGVKs
+		}
+	}
+
+	return schema.GroupVersionKind{}, &AmbiguousResourceError{PartialResource: partiallySpecifiedResource, MatchingKinds: originalGVKs}
+}
+
+func resourceMatches(pattern schema.GroupVersionResource, resource schema.GroupVersionResource) bool {
+	if pattern.Group != AnyGroup && pattern.Group != resource.Group {
+		return false
+	}
+	if pattern.Version != AnyVersion && pattern.Version != resource.Version {
+		return false
+	}
+	if pattern.Resource != AnyResource && pattern.Resource != resource.Resource {
+		return false
+	}
+
+	return true
+}
+
+func kindMatches(pattern schema.GroupVersionKind, kind schema.GroupVersionKind) bool {
+	if pattern.Group != AnyGroup && pattern.Group != kind.Group {
+		return false
+	}
+	if pattern.Version != AnyVersion && pattern.Version != kind.Version {
+		return false
+	}
+	if pattern.Kind != AnyKind && pattern.Kind != kind.Kind {
+		return false
+	}
+
+	return true
+}
+
+func (m PriorityRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (mapping *RESTMapping, err error) {
+	mappings, originalErr := m.Delegate.RESTMappings(gk, versions...)
+	if originalErr != nil && len(mappings) == 0 {
+		return nil, originalErr
+	}
+
+	// any versions the user provides take priority
+	priorities := m.KindPriority
+	if len(versions) > 0 {
+		priorities = make([]schema.GroupVersionKind, 0, len(m.KindPriority)+len(versions))
+		for _, version := range versions {
+			gv := schema.GroupVersion{
+				Version: version,
+				Group:   gk.Group,
+			}
+			priorities = append(priorities, gv.WithKind(AnyKind))
+		}
+		priorities = append(priorities, m.KindPriority...)
+	}
+
+	remaining := append([]*RESTMapping{}, mappings...)
+	for _, pattern := range priorities {
+		var matching []*RESTMapping
+		for _, m := range remaining {
+			if kindMatches(pattern, m.GroupVersionKind) {
+				matching = append(matching, m)
+			}
+		}
+
+		switch len(matching) {
+		case 0:
+			// if you have no matches, then nothing matched this pattern just move to the next
+			continue
+		case 1:
+			// one match, return
+			return matching[0], originalErr
+		default:
+			// more than one match, use the matched hits as the list moving to the next pattern.
+			// this way you can have a series of selection criteria
+			remaining = matching
+		}
+	}
+	if len(remaining) == 1 {
+		return remaining[0], originalErr
+	}
+
+	var kinds []schema.GroupVersionKind
+	for _, m := range mappings {
+		kinds = append(kinds, m.GroupVersionKind)
+	}
+	return nil, &AmbiguousKindError{PartialKind: gk.WithVersion(""), MatchingKinds: kinds}
+}
+
+func (m PriorityRESTMapper) RESTMappings(gk schema.GroupKind, versions ...string) ([]*RESTMapping, error) {
+	return m.Delegate.RESTMappings(gk, versions...)
+}
+
+func (m PriorityRESTMapper) ResourceSingularizer(resource string) (singular string, err error) {
+	return m.Delegate.ResourceSingularizer(resource)
+}
+
+func (m PriorityRESTMapper) ResourcesFor(partiallySpecifiedResource schema.GroupVersionResource) ([]schema.GroupVersionResource, error) {
+	return m.Delegate.ResourcesFor(partiallySpecifiedResource)
+}
+
+func (m PriorityRESTMapper) KindsFor(partiallySpecifiedResource schema.GroupVersionResource) (gvk []schema.GroupVersionKind, err error) {
+	return m.Delegate.KindsFor(partiallySpecifiedResource)
+}

vendor/k8s.io/apimachinery/pkg/api/meta/restmapper.go

@@ -0,0 +1,518 @@
+/*
+Copyright 2014 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.
+*/
+
+// TODO: move everything in this file to pkg/api/rest
+package meta
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+)
+
+// Implements RESTScope interface
+type restScope struct {
+	name RESTScopeName
+}
+
+func (r *restScope) Name() RESTScopeName {
+	return r.name
+}
+
+var RESTScopeNamespace = &restScope{
+	name: RESTScopeNameNamespace,
+}
+
+var RESTScopeRoot = &restScope{
+	name: RESTScopeNameRoot,
+}
+
+// DefaultRESTMapper exposes mappings between the types defined in a
+// runtime.Scheme. It assumes that all types defined the provided scheme
+// can be mapped with the provided MetadataAccessor and Codec interfaces.
+//
+// The resource name of a Kind is defined as the lowercase,
+// English-plural version of the Kind string.
+// When converting from resource to Kind, the singular version of the
+// resource name is also accepted for convenience.
+//
+// TODO: Only accept plural for some operations for increased control?
+// (`get pod bar` vs `get pods bar`)
+type DefaultRESTMapper struct {
+	defaultGroupVersions []schema.GroupVersion
+
+	resourceToKind       map[schema.GroupVersionResource]schema.GroupVersionKind
+	kindToPluralResource map[schema.GroupVersionKind]schema.GroupVersionResource
+	kindToScope          map[schema.GroupVersionKind]RESTScope
+	singularToPlural     map[schema.GroupVersionResource]schema.GroupVersionResource
+	pluralToSingular     map[schema.GroupVersionResource]schema.GroupVersionResource
+}
+
+func (m *DefaultRESTMapper) String() string {
+	return fmt.Sprintf("DefaultRESTMapper{kindToPluralResource=%v}", m.kindToPluralResource)
+}
+
+var _ RESTMapper = &DefaultRESTMapper{}
+
+// NewDefaultRESTMapper initializes a mapping between Kind and APIVersion
+// to a resource name and back based on the objects in a runtime.Scheme
+// and the Kubernetes API conventions. Takes a group name, a priority list of the versions
+// to search when an object has no default version (set empty to return an error),
+// and a function that retrieves the correct metadata for a given version.
+func NewDefaultRESTMapper(defaultGroupVersions []schema.GroupVersion) *DefaultRESTMapper {
+	resourceToKind := make(map[schema.GroupVersionResource]schema.GroupVersionKind)
+	kindToPluralResource := make(map[schema.GroupVersionKind]schema.GroupVersionResource)
+	kindToScope := make(map[schema.GroupVersionKind]RESTScope)
+	singularToPlural := make(map[schema.GroupVersionResource]schema.GroupVersionResource)
+	pluralToSingular := make(map[schema.GroupVersionResource]schema.GroupVersionResource)
+	// TODO: verify name mappings work correctly when versions differ
+
+	return &DefaultRESTMapper{
+		resourceToKind:       resourceToKind,
+		kindToPluralResource: kindToPluralResource,
+		kindToScope:          kindToScope,
+		defaultGroupVersions: defaultGroupVersions,
+		singularToPlural:     singularToPlural,
+		pluralToSingular:     pluralToSingular,
+	}
+}
+
+func (m *DefaultRESTMapper) Add(kind schema.GroupVersionKind, scope RESTScope) {
+	plural, singular := UnsafeGuessKindToResource(kind)
+	m.AddSpecific(kind, plural, singular, scope)
+}
+
+func (m *DefaultRESTMapper) AddSpecific(kind schema.GroupVersionKind, plural, singular schema.GroupVersionResource, scope RESTScope) {
+	m.singularToPlural[singular] = plural
+	m.pluralToSingular[plural] = singular
+
+	m.resourceToKind[singular] = kind
+	m.resourceToKind[plural] = kind
+
+	m.kindToPluralResource[kind] = plural
+	m.kindToScope[kind] = scope
+}
+
+// unpluralizedSuffixes is a list of resource suffixes that are the same plural and singular
+// This is only is only necessary because some bits of code are lazy and don't actually use the RESTMapper like they should.
+// TODO eliminate this so that different callers can correctly map to resources.  This probably means updating all
+// callers to use the RESTMapper they mean.
+var unpluralizedSuffixes = []string{
+	"endpoints",
+}
+
+// UnsafeGuessKindToResource converts Kind to a resource name.
+// Broken. This method only "sort of" works when used outside of this package.  It assumes that Kinds and Resources match
+// and they aren't guaranteed to do so.
+func UnsafeGuessKindToResource(kind schema.GroupVersionKind) ( /*plural*/ schema.GroupVersionResource /*singular*/, schema.GroupVersionResource) {
+	kindName := kind.Kind
+	if len(kindName) == 0 {
+		return schema.GroupVersionResource{}, schema.GroupVersionResource{}
+	}
+	singularName := strings.ToLower(kindName)
+	singular := kind.GroupVersion().WithResource(singularName)
+
+	for _, skip := range unpluralizedSuffixes {
+		if strings.HasSuffix(singularName, skip) {
+			return singular, singular
+		}
+	}
+
+	switch string(singularName[len(singularName)-1]) {
+	case "s":
+		return kind.GroupVersion().WithResource(singularName + "es"), singular
+	case "y":
+		return kind.GroupVersion().WithResource(strings.TrimSuffix(singularName, "y") + "ies"), singular
+	}
+
+	return kind.GroupVersion().WithResource(singularName + "s"), singular
+}
+
+// ResourceSingularizer implements RESTMapper
+// It converts a resource name from plural to singular (e.g., from pods to pod)
+func (m *DefaultRESTMapper) ResourceSingularizer(resourceType string) (string, error) {
+	partialResource := schema.GroupVersionResource{Resource: resourceType}
+	resources, err := m.ResourcesFor(partialResource)
+	if err != nil {
+		return resourceType, err
+	}
+
+	singular := schema.GroupVersionResource{}
+	for _, curr := range resources {
+		currSingular, ok := m.pluralToSingular[curr]
+		if !ok {
+			continue
+		}
+		if singular.Empty() {
+			singular = currSingular
+			continue
+		}
+
+		if currSingular.Resource != singular.Resource {
+			return resourceType, fmt.Errorf("multiple possible singular resources (%v) found for %v", resources, resourceType)
+		}
+	}
+
+	if singular.Empty() {
+		return resourceType, fmt.Errorf("no singular of resource %v has been defined", resourceType)
+	}
+
+	return singular.Resource, nil
+}
+
+// coerceResourceForMatching makes the resource lower case and converts internal versions to unspecified (legacy behavior)
+func coerceResourceForMatching(resource schema.GroupVersionResource) schema.GroupVersionResource {
+	resource.Resource = strings.ToLower(resource.Resource)
+	if resource.Version == runtime.APIVersionInternal {
+		resource.Version = ""
+	}
+
+	return resource
+}
+
+func (m *DefaultRESTMapper) ResourcesFor(input schema.GroupVersionResource) ([]schema.GroupVersionResource, error) {
+	resource := coerceResourceForMatching(input)
+
+	hasResource := len(resource.Resource) > 0
+	hasGroup := len(resource.Group) > 0
+	hasVersion := len(resource.Version) > 0
+
+	if !hasResource {
+		return nil, fmt.Errorf("a resource must be present, got: %v", resource)
+	}
+
+	ret := []schema.GroupVersionResource{}
+	switch {
+	case hasGroup && hasVersion:
+		// fully qualified.  Find the exact match
+		for plural, singular := range m.pluralToSingular {
+			if singular == resource {
+				ret = append(ret, plural)
+				break
+			}
+			if plural == resource {
+				ret = append(ret, plural)
+				break
+			}
+		}
+
+	case hasGroup:
+		// given a group, prefer an exact match.  If you don't find one, resort to a prefix match on group
+		foundExactMatch := false
+		requestedGroupResource := resource.GroupResource()
+		for plural, singular := range m.pluralToSingular {
+			if singular.GroupResource() == requestedGroupResource {
+				foundExactMatch = true
+				ret = append(ret, plural)
+			}
+			if plural.GroupResource() == requestedGroupResource {
+				foundExactMatch = true
+				ret = append(ret, plural)
+			}
+		}
+
+		// if you didn't find an exact match, match on group prefixing. This allows storageclass.storage to match
+		// storageclass.storage.k8s.io
+		if !foundExactMatch {
+			for plural, singular := range m.pluralToSingular {
+				if !strings.HasPrefix(plural.Group, requestedGroupResource.Group) {
+					continue
+				}
+				if singular.Resource == requestedGroupResource.Resource {
+					ret = append(ret, plural)
+				}
+				if plural.Resource == requestedGroupResource.Resource {
+					ret = append(ret, plural)
+				}
+			}
+
+		}
+
+	case hasVersion:
+		for plural, singular := range m.pluralToSingular {
+			if singular.Version == resource.Version && singular.Resource == resource.Resource {
+				ret = append(ret, plural)
+			}
+			if plural.Version == resource.Version && plural.Resource == resource.Resource {
+				ret = append(ret, plural)
+			}
+		}
+
+	default:
+		for plural, singular := range m.pluralToSingular {
+			if singular.Resource == resource.Resource {
+				ret = append(ret, plural)
+			}
+			if plural.Resource == resource.Resource {
+				ret = append(ret, plural)
+			}
+		}
+	}
+
+	if len(ret) == 0 {
+		return nil, &NoResourceMatchError{PartialResource: resource}
+	}
+
+	sort.Sort(resourceByPreferredGroupVersion{ret, m.defaultGroupVersions})
+	return ret, nil
+}
+
+func (m *DefaultRESTMapper) ResourceFor(resource schema.GroupVersionResource) (schema.GroupVersionResource, error) {
+	resources, err := m.ResourcesFor(resource)
+	if err != nil {
+		return schema.GroupVersionResource{}, err
+	}
+	if len(resources) == 1 {
+		return resources[0], nil
+	}
+
+	return schema.GroupVersionResource{}, &AmbiguousResourceError{PartialResource: resource, MatchingResources: resources}
+}
+
+func (m *DefaultRESTMapper) KindsFor(input schema.GroupVersionResource) ([]schema.GroupVersionKind, error) {
+	resource := coerceResourceForMatching(input)
+
+	hasResource := len(resource.Resource) > 0
+	hasGroup := len(resource.Group) > 0
+	hasVersion := len(resource.Version) > 0
+
+	if !hasResource {
+		return nil, fmt.Errorf("a resource must be present, got: %v", resource)
+	}
+
+	ret := []schema.GroupVersionKind{}
+	switch {
+	// fully qualified.  Find the exact match
+	case hasGroup && hasVersion:
+		kind, exists := m.resourceToKind[resource]
+		if exists {
+			ret = append(ret, kind)
+		}
+
+	case hasGroup:
+		foundExactMatch := false
+		requestedGroupResource := resource.GroupResource()
+		for currResource, currKind := range m.resourceToKind {
+			if currResource.GroupResource() == requestedGroupResource {
+				foundExactMatch = true
+				ret = append(ret, currKind)
+			}
+		}
+
+		// if you didn't find an exact match, match on group prefixing. This allows storageclass.storage to match
+		// storageclass.storage.k8s.io
+		if !foundExactMatch {
+			for currResource, currKind := range m.resourceToKind {
+				if !strings.HasPrefix(currResource.Group, requestedGroupResource.Group) {
+					continue
+				}
+				if currResource.Resource == requestedGroupResource.Resource {
+					ret = append(ret, currKind)
+				}
+			}
+
+		}
+
+	case hasVersion:
+		for currResource, currKind := range m.resourceToKind {
+			if currResource.Version == resource.Version && currResource.Resource == resource.Resource {
+				ret = append(ret, currKind)
+			}
+		}
+
+	default:
+		for currResource, currKind := range m.resourceToKind {
+			if currResource.Resource == resource.Resource {
+				ret = append(ret, currKind)
+			}
+		}
+	}
+
+	if len(ret) == 0 {
+		return nil, &NoResourceMatchError{PartialResource: input}
+	}
+
+	sort.Sort(kindByPreferredGroupVersion{ret, m.defaultGroupVersions})
+	return ret, nil
+}
+
+func (m *DefaultRESTMapper) KindFor(resource schema.GroupVersionResource) (schema.GroupVersionKind, error) {
+	kinds, err := m.KindsFor(resource)
+	if err != nil {
+		return schema.GroupVersionKind{}, err
+	}
+	if len(kinds) == 1 {
+		return kinds[0], nil
+	}
+
+	return schema.GroupVersionKind{}, &AmbiguousResourceError{PartialResource: resource, MatchingKinds: kinds}
+}
+
+type kindByPreferredGroupVersion struct {
+	list      []schema.GroupVersionKind
+	sortOrder []schema.GroupVersion
+}
+
+func (o kindByPreferredGroupVersion) Len() int      { return len(o.list) }
+func (o kindByPreferredGroupVersion) Swap(i, j int) { o.list[i], o.list[j] = o.list[j], o.list[i] }
+func (o kindByPreferredGroupVersion) Less(i, j int) bool {
+	lhs := o.list[i]
+	rhs := o.list[j]
+	if lhs == rhs {
+		return false
+	}
+
+	if lhs.GroupVersion() == rhs.GroupVersion() {
+		return lhs.Kind < rhs.Kind
+	}
+
+	// otherwise, the difference is in the GroupVersion, so we need to sort with respect to the preferred order
+	lhsIndex := -1
+	rhsIndex := -1
+
+	for i := range o.sortOrder {
+		if o.sortOrder[i] == lhs.GroupVersion() {
+			lhsIndex = i
+		}
+		if o.sortOrder[i] == rhs.GroupVersion() {
+			rhsIndex = i
+		}
+	}
+
+	if rhsIndex == -1 {
+		return true
+	}
+
+	return lhsIndex < rhsIndex
+}
+
+type resourceByPreferredGroupVersion struct {
+	list      []schema.GroupVersionResource
+	sortOrder []schema.GroupVersion
+}
+
+func (o resourceByPreferredGroupVersion) Len() int      { return len(o.list) }
+func (o resourceByPreferredGroupVersion) Swap(i, j int) { o.list[i], o.list[j] = o.list[j], o.list[i] }
+func (o resourceByPreferredGroupVersion) Less(i, j int) bool {
+	lhs := o.list[i]
+	rhs := o.list[j]
+	if lhs == rhs {
+		return false
+	}
+
+	if lhs.GroupVersion() == rhs.GroupVersion() {
+		return lhs.Resource < rhs.Resource
+	}
+
+	// otherwise, the difference is in the GroupVersion, so we need to sort with respect to the preferred order
+	lhsIndex := -1
+	rhsIndex := -1
+
+	for i := range o.sortOrder {
+		if o.sortOrder[i] == lhs.GroupVersion() {
+			lhsIndex = i
+		}
+		if o.sortOrder[i] == rhs.GroupVersion() {
+			rhsIndex = i
+		}
+	}
+
+	if rhsIndex == -1 {
+		return true
+	}
+
+	return lhsIndex < rhsIndex
+}
+
+// RESTMapping returns a struct representing the resource path and conversion interfaces a
+// RESTClient should use to operate on the provided group/kind in order of versions. If a version search
+// order is not provided, the search order provided to DefaultRESTMapper will be used to resolve which
+// version should be used to access the named group/kind.
+func (m *DefaultRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (*RESTMapping, error) {
+	mappings, err := m.RESTMappings(gk, versions...)
+	if err != nil {
+		return nil, err
+	}
+	if len(mappings) == 0 {
+		return nil, &NoKindMatchError{GroupKind: gk, SearchedVersions: versions}
+	}
+	// since we rely on RESTMappings method
+	// take the first match and return to the caller
+	// as this was the existing behavior.
+	return mappings[0], nil
+}
+
+// RESTMappings returns the RESTMappings for the provided group kind. If a version search order
+// is not provided, the search order provided to DefaultRESTMapper will be used.
+func (m *DefaultRESTMapper) RESTMappings(gk schema.GroupKind, versions ...string) ([]*RESTMapping, error) {
+	mappings := make([]*RESTMapping, 0)
+	potentialGVK := make([]schema.GroupVersionKind, 0)
+	hadVersion := false
+
+	// Pick an appropriate version
+	for _, version := range versions {
+		if len(version) == 0 || version == runtime.APIVersionInternal {
+			continue
+		}
+		currGVK := gk.WithVersion(version)
+		hadVersion = true
+		if _, ok := m.kindToPluralResource[currGVK]; ok {
+			potentialGVK = append(potentialGVK, currGVK)
+			break
+		}
+	}
+	// Use the default preferred versions
+	if !hadVersion && len(potentialGVK) == 0 {
+		for _, gv := range m.defaultGroupVersions {
+			if gv.Group != gk.Group {
+				continue
+			}
+			potentialGVK = append(potentialGVK, gk.WithVersion(gv.Version))
+		}
+	}
+
+	if len(potentialGVK) == 0 {
+		return nil, &NoKindMatchError{GroupKind: gk, SearchedVersions: versions}
+	}
+
+	for _, gvk := range potentialGVK {
+		//Ensure we have a REST mapping
+		res, ok := m.kindToPluralResource[gvk]
+		if !ok {
+			continue
+		}
+
+		// Ensure we have a REST scope
+		scope, ok := m.kindToScope[gvk]
+		if !ok {
+			return nil, fmt.Errorf("the provided version %q and kind %q cannot be mapped to a supported scope", gvk.GroupVersion(), gvk.Kind)
+		}
+
+		mappings = append(mappings, &RESTMapping{
+			Resource:         res,
+			GroupVersionKind: gvk,
+			Scope:            scope,
+		})
+	}
+
+	if len(mappings) == 0 {
+		return nil, &NoResourceMatchError{PartialResource: schema.GroupVersionResource{Group: gk.Group, Resource: gk.Kind}}
+	}
+	return mappings, nil
+}