<commit_before>/*
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 discovery

import (
	"fmt"
	"sync"

	"k8s.io/kubernetes/pkg/api/errors"
	"k8s.io/kubernetes/pkg/api/meta"
	"k8s.io/kubernetes/pkg/api/unversioned"

	"github.com/golang/glog"
)

// APIGroupResources is an API group with a mapping of versions to
// resources.
type APIGroupResources struct {
	Group unversioned.APIGroup
	// A mapping of version string to a slice of APIResources for
	// that version.
	VersionedResources map[string][]unversioned.APIResource
}

// NewRESTMapper returns a PriorityRESTMapper based on the discovered
// groups and resources passed in.
func NewRESTMapper(groupResources []*APIGroupResources, versionInterfaces meta.VersionInterfacesFunc) meta.RESTMapper {
	unionMapper := meta.MultiRESTMapper{}

	var groupPriority []string
	var resourcePriority []unversioned.GroupVersionResource
	var kindPriority []unversioned.GroupVersionKind

	for _, group := range groupResources {
		groupPriority = append(groupPriority, group.Group.Name)

		if len(group.Group.PreferredVersion.Version) != 0 {
			preferred := group.Group.PreferredVersion.Version
			if _, ok := group.VersionedResources[preferred]; ok {
				resourcePriority = append(resourcePriority, unversioned.GroupVersionResource{
					Group:    group.Group.Name,<commit_msg>UPSTREAM: 42275: discovery restmapping should always prefer /v1<commit_after>/*
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 discovery

import (
	"fmt"
	"sync"

	"k8s.io/kubernetes/pkg/api/errors"
	"k8s.io/kubernetes/pkg/api/meta"
	"k8s.io/kubernetes/pkg/api/unversioned"

	"github.com/golang/glog"
)

// APIGroupResources is an API group with a mapping of versions to
// resources.
type APIGroupResources struct {
	Group unversioned.APIGroup
	// A mapping of version string to a slice of APIResources for
	// that version.
	VersionedResources map[string][]unversioned.APIResource
}

// NewRESTMapper returns a PriorityRESTMapper based on the discovered
// groups and resources passed in.
func NewRESTMapper(groupResources []*APIGroupResources, versionInterfaces meta.VersionInterfacesFunc) meta.RESTMapper {
	unionMapper := meta.MultiRESTMapper{}

	var groupPriority []string
	// /v1 is special.  It should always come first
	resourcePriority := []unversioned.GroupVersionResource{{Group: "", Version: "v1", Resource: meta.AnyResource}}
	kindPriority := []unversioned.GroupVersionKind{{Group: "", Version: "v1", Kind: meta.AnyKind}}

	for _, group := range groupResources {
		groupPriority = append(groupPriority, group.Group.Name)

		if len(group.Group.PreferredVersion.Version) != 0 {
			preferred := group.Group.PreferredVersion.Version
			if _, ok := group.VersionedResources[preferred]; ok {
				resourcePriority = append(resourcePriority, unversioned.GroupVersionResource{
					Group:    group.Group.Name,
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