1 files changed, 304 insertions, 0 deletions
diff --git a/vendor/k8s.io/client-go/discovery/restmapper.go b/vendor/k8s.io/client-go/discovery/restmapper.go
new file mode 100644
index 000000000..756669001
--- /dev/null
+++ b/vendor/k8s.io/client-go/discovery/restmapper.go
@@ -0,0 +1,304 @@
+/*
+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/apimachinery/pkg/api/meta"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+
+	"github.com/golang/glog"
+)
+
+// APIGroupResources is an API group with a mapping of versions to
+// resources.
+type APIGroupResources struct {
+	Group metav1.APIGroup
+	// A mapping of version string to a slice of APIResources for
+	// that version.
+	VersionedResources map[string][]metav1.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 := []schema.GroupVersionResource{{Group: "", Version: "v1", Resource: meta.AnyResource}}
+	kindPriority := []schema.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, schema.GroupVersionResource{
+					Group:    group.Group.Name,
+					Version:  group.Group.PreferredVersion.Version,
+					Resource: meta.AnyResource,
+				})
+
+				kindPriority = append(kindPriority, schema.GroupVersionKind{
+					Group:   group.Group.Name,
+					Version: group.Group.PreferredVersion.Version,
+					Kind:    meta.AnyKind,
+				})
+			}
+		}
+
+		for _, discoveryVersion := range group.Group.Versions {
+			resources, ok := group.VersionedResources[discoveryVersion.Version]
+			if !ok {
+				continue
+			}
+
+			gv := schema.GroupVersion{Group: group.Group.Name, Version: discoveryVersion.Version}
+			versionMapper := meta.NewDefaultRESTMapper([]schema.GroupVersion{gv}, versionInterfaces)
+
+			for _, resource := range resources {
+				scope := meta.RESTScopeNamespace
+				if !resource.Namespaced {
+					scope = meta.RESTScopeRoot
+				}
+				versionMapper.Add(gv.WithKind(resource.Kind), scope)
+				// TODO only do this if it supports listing
+				versionMapper.Add(gv.WithKind(resource.Kind+"List"), scope)
+			}
+			// TODO why is this type not in discovery (at least for "v1")
+			versionMapper.Add(gv.WithKind("List"), meta.RESTScopeRoot)
+			unionMapper = append(unionMapper, versionMapper)
+		}
+	}
+
+	for _, group := range groupPriority {
+		resourcePriority = append(resourcePriority, schema.GroupVersionResource{
+			Group:    group,
+			Version:  meta.AnyVersion,
+			Resource: meta.AnyResource,
+		})
+		kindPriority = append(kindPriority, schema.GroupVersionKind{
+			Group:   group,
+			Version: meta.AnyVersion,
+			Kind:    meta.AnyKind,
+		})
+	}
+
+	return meta.PriorityRESTMapper{
+		Delegate:         unionMapper,
+		ResourcePriority: resourcePriority,
+		KindPriority:     kindPriority,
+	}
+}
+
+// GetAPIGroupResources uses the provided discovery client to gather
+// discovery information and populate a slice of APIGroupResources.
+func GetAPIGroupResources(cl DiscoveryInterface) ([]*APIGroupResources, error) {
+	apiGroups, err := cl.ServerGroups()
+	if err != nil {
+		return nil, err
+	}
+	var result []*APIGroupResources
+	for _, group := range apiGroups.Groups {
+		groupResources := &APIGroupResources{
+			Group:              group,
+			VersionedResources: make(map[string][]metav1.APIResource),
+		}
+		for _, version := range group.Versions {
+			resources, err := cl.ServerResourcesForGroupVersion(version.GroupVersion)
+			if err != nil {
+				// continue as best we can
+				// TODO track the errors and update callers to handle partial errors.
+				continue
+			}
+			groupResources.VersionedResources[version.Version] = resources.APIResources
+		}
+		result = append(result, groupResources)
+	}
+	return result, nil
+}
+
+// DeferredDiscoveryRESTMapper is a RESTMapper that will defer
+// initialization of the RESTMapper until the first mapping is
+// requested.
+type DeferredDiscoveryRESTMapper struct {
+	initMu           sync.Mutex
+	delegate         meta.RESTMapper
+	cl               CachedDiscoveryInterface
+	versionInterface meta.VersionInterfacesFunc
+}
+
+// NewDeferredDiscoveryRESTMapper returns a
+// DeferredDiscoveryRESTMapper that will lazily query the provided
+// client for discovery information to do REST mappings.
+func NewDeferredDiscoveryRESTMapper(cl CachedDiscoveryInterface, versionInterface meta.VersionInterfacesFunc) *DeferredDiscoveryRESTMapper {
+	return &DeferredDiscoveryRESTMapper{
+		cl:               cl,
+		versionInterface: versionInterface,
+	}
+}
+
+func (d *DeferredDiscoveryRESTMapper) getDelegate() (meta.RESTMapper, error) {
+	d.initMu.Lock()
+	defer d.initMu.Unlock()
+
+	if d.delegate != nil {
+		return d.delegate, nil
+	}
+
+	groupResources, err := GetAPIGroupResources(d.cl)
+	if err != nil {
+		return nil, err
+	}
+
+	d.delegate = NewRESTMapper(groupResources, d.versionInterface)
+	return d.delegate, err
+}
+
+// Reset resets the internally cached Discovery information and will
+// cause the next mapping request to re-discover.
+func (d *DeferredDiscoveryRESTMapper) Reset() {
+	glog.V(5).Info("Invalidating discovery information")
+
+	d.initMu.Lock()
+	defer d.initMu.Unlock()
+
+	d.cl.Invalidate()
+	d.delegate = nil
+}
+
+// KindFor takes a partial resource and returns back the single match.
+// It returns an error if there are multiple matches.
+func (d *DeferredDiscoveryRESTMapper) KindFor(resource schema.GroupVersionResource) (gvk schema.GroupVersionKind, err error) {
+	del, err := d.getDelegate()
+	if err != nil {
+		return schema.GroupVersionKind{}, err
+	}
+	gvk, err = del.KindFor(resource)
+	if err != nil && !d.cl.Fresh() {
+		d.Reset()
+		gvk, err = d.KindFor(resource)
+	}
+	return
+}
+
+// KindsFor takes a partial resource and returns back the list of
+// potential kinds in priority order.
+func (d *DeferredDiscoveryRESTMapper) KindsFor(resource schema.GroupVersionResource) (gvks []schema.GroupVersionKind, err error) {
+	del, err := d.getDelegate()
+	if err != nil {
+		return nil, err
+	}
+	gvks, err = del.KindsFor(resource)
+	if len(gvks) == 0 && !d.cl.Fresh() {
+		d.Reset()
+		gvks, err = d.KindsFor(resource)
+	}
+	return
+}
+
+// ResourceFor takes a partial resource and returns back the single
+// match. It returns an error if there are multiple matches.
+func (d *DeferredDiscoveryRESTMapper) ResourceFor(input schema.GroupVersionResource) (gvr schema.GroupVersionResource, err error) {
+	del, err := d.getDelegate()
+	if err != nil {
+		return schema.GroupVersionResource{}, err
+	}
+	gvr, err = del.ResourceFor(input)
+	if err != nil && !d.cl.Fresh() {
+		d.Reset()
+		gvr, err = d.ResourceFor(input)
+	}
+	return
+}
+
+// ResourcesFor takes a partial resource and returns back the list of
+// potential resource in priority order.
+func (d *DeferredDiscoveryRESTMapper) ResourcesFor(input schema.GroupVersionResource) (gvrs []schema.GroupVersionResource, err error) {
+	del, err := d.getDelegate()
+	if err != nil {
+		return nil, err
+	}
+	gvrs, err = del.ResourcesFor(input)
+	if len(gvrs) == 0 && !d.cl.Fresh() {
+		d.Reset()
+		gvrs, err = d.ResourcesFor(input)
+	}
+	return
+}
+
+// RESTMapping identifies a preferred resource mapping for the
+// provided group kind.
+func (d *DeferredDiscoveryRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (m *meta.RESTMapping, err error) {
+	del, err := d.getDelegate()
+	if err != nil {
+		return nil, err
+	}
+	m, err = del.RESTMapping(gk, versions...)
+	if err != nil && !d.cl.Fresh() {
+		d.Reset()
+		m, err = d.RESTMapping(gk, versions...)
+	}
+	return
+}
+
+// RESTMappings returns the RESTMappings for the provided group kind
+// in a rough internal preferred order. If no kind is found, it will
+// return a NoResourceMatchError.
+func (d *DeferredDiscoveryRESTMapper) RESTMappings(gk schema.GroupKind, versions ...string) (ms []*meta.RESTMapping, err error) {
+	del, err := d.getDelegate()
+	if err != nil {
+		return nil, err
+	}
+	ms, err = del.RESTMappings(gk, versions...)
+	if len(ms) == 0 && !d.cl.Fresh() {
+		d.Reset()
+		ms, err = d.RESTMappings(gk, versions...)
+	}
+	return
+}
+
+// ResourceSingularizer converts a resource name from plural to
+// singular (e.g., from pods to pod).
+func (d *DeferredDiscoveryRESTMapper) ResourceSingularizer(resource string) (singular string, err error) {
+	del, err := d.getDelegate()
+	if err != nil {
+		return resource, err
+	}
+	singular, err = del.ResourceSingularizer(resource)
+	if err != nil && !d.cl.Fresh() {
+		d.Reset()
+		singular, err = d.ResourceSingularizer(resource)
+	}
+	return
+}
+
+func (d *DeferredDiscoveryRESTMapper) String() string {
+	del, err := d.getDelegate()
+	if err != nil {
+		return fmt.Sprintf("DeferredDiscoveryRESTMapper{%v}", err)
+	}
+	return fmt.Sprintf("DeferredDiscoveryRESTMapper{\n\t%v\n}", del)
+}
+
+// Make sure it satisfies the interface
+var _ meta.RESTMapper = &DeferredDiscoveryRESTMapper{}