add expansion interface

cmd/libs/go2idl/client-gen/generators/client-generator.go

@@ -18,6 +18,7 @@ limitations under the License.
 package generators
 
 import (
+	"os"
 	"path/filepath"
 	"strings"
 
@@ -50,8 +51,8 @@ func DefaultNameSystem() string {
 	return "public"
 }
 
-func packageForGroup(group string, version string, typeList []*types.Type, basePath string, boilerplate []byte) generator.Package {
-	outputPackagePath := filepath.Join(basePath, group, version)
+func packageForGroup(group string, version string, typeList []*types.Type, packageBasePath string, srcTreePath string, boilerplate []byte) generator.Package {
+	outputPackagePath := filepath.Join(packageBasePath, group, version)
 	return &generator.DefaultPackage{
 		PackageName: version,
 		PackagePath: outputPackagePath,
@@ -89,6 +90,18 @@ func packageForGroup(group string, version string, typeList []*types.Type, baseP
 				types:         typeList,
 				imports:       generator.NewImportTracker(),
 			})
+
+			expansionFileName := "generated_expansion"
+			// To avoid overriding user's manual modification, only generate the expansion file if it doesn't exist.
+			if _, err := os.Stat(filepath.Join(srcTreePath, outputPackagePath, expansionFileName+".go")); os.IsNotExist(err) {
+				generators = append(generators, &genExpansion{
+					DefaultGen: generator.DefaultGen{
+						OptionalName: expansionFileName,
+					},
+					types: typeList,
+				})
+			}
+
 			return generators
 		},
 		FilterFunc: func(c *generator.Context, t *types.Type) bool {
@@ -126,7 +139,7 @@ func Packages(context *generator.Context, arguments *args.GeneratorArgs) generat
 	var packageList []generator.Package
 	orderer := namer.Orderer{namer.NewPrivateNamer(0)}
 	for group, types := range groupToTypes {
-		packageList = append(packageList, packageForGroup(group, "unversioned", orderer.OrderTypes(types), arguments.OutputPackagePath, boilerplate))
+		packageList = append(packageList, packageForGroup(group, "unversioned", orderer.OrderTypes(types), arguments.OutputPackagePath, arguments.OutputBase, boilerplate))
 	}
 
 	return generator.Packages(packageList)

cmd/libs/go2idl/client-gen/generators/generator-for-expansion.go

@@ -0,0 +1,48 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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"
+
+	"k8s.io/kubernetes/cmd/libs/go2idl/generator"
+	"k8s.io/kubernetes/cmd/libs/go2idl/types"
+)
+
+// genExpansion produces a file for a group client, e.g. ExtensionsClient for the extension group.
+type genExpansion struct {
+	generator.DefaultGen
+	// types in a group
+	types []*types.Type
+}
+
+// We only want to call GenerateType() once per group.
+func (g *genExpansion) Filter(c *generator.Context, t *types.Type) bool {
+	return t == g.types[0]
+}
+
+func (g *genExpansion) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
+	sw := generator.NewSnippetWriter(w, c, "$", "$")
+	for _, t := range g.types {
+		sw.Do(expansionInterfaceTemplate, t)
+	}
+	return sw.Error()
+}
+
+var expansionInterfaceTemplate = `
+type $.|public$Expansion interface {}
+`

cmd/libs/go2idl/client-gen/generators/generator-for-type.go

@@ -94,6 +94,7 @@ type $.type|public$Interface interface {
 	Get(name string) (*$.type|raw$, error)
 	List(opts $.apiListOptions|raw$) (*$.type|raw$List, error)
 	Watch(opts $.apiListOptions|raw$) ($.watchInterface|raw$, error)
+	$.type|public$Expansion
 }
 `
 

cmd/libs/go2idl/client-gen/testoutput/testgroup/unversioned/generated_expansion.go

@@ -0,0 +1,17 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 unversioned

cmd/libs/go2idl/client-gen/testoutput/testgroup/unversioned/testgroup_test.go

@@ -214,3 +214,10 @@ func TestListTestTypesLabels(t *testing.T) {
 	receivedTestTypeList, err := c.TestTypes(ns).List(options)
 	c.simpleClient.Validate(t, receivedTestTypeList, err)
 }
+
+func TestExpansionInterface(t *testing.T) {
+	c := New(nil)
+	if e, a := "hello!", c.TestTypes("").Hello(); e != a {
+		t.Errorf("expansion failed")
+	}
+}

cmd/libs/go2idl/client-gen/testoutput/testgroup/unversioned/testtype.go

@@ -36,6 +36,7 @@ type TestTypeInterface interface {
 	Get(name string) (*testgroup.TestType, error)
 	List(opts api.ListOptions) (*testgroup.TestTypeList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	TestTypeExpansion
 }
 
 // testTypes implements TestTypeInterface

cmd/libs/go2idl/client-gen/testoutput/testgroup/unversioned/testtype_expansion.go

@@ -0,0 +1,25 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 unversioned
+
+type TestTypeExpansion interface {
+	Hello() string
+}
+
+func (c *testTypes) Hello() string {
+	return "hello!"
+}

pkg/client/typed/generated/extensions/unversioned/daemonset.go

@@ -36,6 +36,7 @@ type DaemonSetInterface interface {
 	Get(name string) (*extensions.DaemonSet, error)
 	List(opts api.ListOptions) (*extensions.DaemonSetList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	DaemonSetExpansion
 }
 
 // daemonSets implements DaemonSetInterface

pkg/client/typed/generated/extensions/unversioned/deployment.go

@@ -36,6 +36,7 @@ type DeploymentInterface interface {
 	Get(name string) (*extensions.Deployment, error)
 	List(opts api.ListOptions) (*extensions.DeploymentList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	DeploymentExpansion
 }
 
 // deployments implements DeploymentInterface

pkg/client/typed/generated/extensions/unversioned/generated_expansion.go

@@ -0,0 +1,29 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 unversioned
+
+type DaemonSetExpansion interface{}
+
+type DeploymentExpansion interface{}
+
+type HorizontalPodAutoscalerExpansion interface{}
+
+type IngressExpansion interface{}
+
+type JobExpansion interface{}
+
+type ThirdPartyResourceExpansion interface{}

pkg/client/typed/generated/extensions/unversioned/horizontalpodautoscaler.go

@@ -36,6 +36,7 @@ type HorizontalPodAutoscalerInterface interface {
 	Get(name string) (*extensions.HorizontalPodAutoscaler, error)
 	List(opts api.ListOptions) (*extensions.HorizontalPodAutoscalerList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	HorizontalPodAutoscalerExpansion
 }
 
 // horizontalPodAutoscalers implements HorizontalPodAutoscalerInterface

pkg/client/typed/generated/extensions/unversioned/ingress.go

@@ -36,6 +36,7 @@ type IngressInterface interface {
 	Get(name string) (*extensions.Ingress, error)
 	List(opts api.ListOptions) (*extensions.IngressList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	IngressExpansion
 }
 
 // ingresses implements IngressInterface

pkg/client/typed/generated/extensions/unversioned/job.go

@@ -36,6 +36,7 @@ type JobInterface interface {
 	Get(name string) (*extensions.Job, error)
 	List(opts api.ListOptions) (*extensions.JobList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	JobExpansion
 }
 
 // jobs implements JobInterface

pkg/client/typed/generated/extensions/unversioned/thirdpartyresource.go

@@ -36,6 +36,7 @@ type ThirdPartyResourceInterface interface {
 	Get(name string) (*extensions.ThirdPartyResource, error)
 	List(opts api.ListOptions) (*extensions.ThirdPartyResourceList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	ThirdPartyResourceExpansion
 }
 
 // thirdPartyResources implements ThirdPartyResourceInterface

pkg/client/typed/generated/legacy/unversioned/componentstatus.go

@@ -35,6 +35,7 @@ type ComponentStatusInterface interface {
 	Get(name string) (*api.ComponentStatus, error)
 	List(opts api.ListOptions) (*api.ComponentStatusList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	ComponentStatusExpansion
 }
 
 // componentStatus implements ComponentStatusInterface

pkg/client/typed/generated/legacy/unversioned/endpoints.go

@@ -35,6 +35,7 @@ type EndpointsInterface interface {
 	Get(name string) (*api.Endpoints, error)
 	List(opts api.ListOptions) (*api.EndpointsList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	EndpointsExpansion
 }
 
 // endpoints implements EndpointsInterface

pkg/client/typed/generated/legacy/unversioned/event.go

@@ -35,6 +35,7 @@ type EventInterface interface {
 	Get(name string) (*api.Event, error)
 	List(opts api.ListOptions) (*api.EventList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	EventExpansion
 }
 
 // events implements EventInterface

pkg/client/typed/generated/legacy/unversioned/generated_expansion.go

@@ -0,0 +1,47 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 unversioned
+
+type ComponentStatusExpansion interface{}
+
+type EndpointsExpansion interface{}
+
+type EventExpansion interface{}
+
+type LimitRangeExpansion interface{}
+
+type NamespaceExpansion interface{}
+
+type NodeExpansion interface{}
+
+type PersistentVolumeExpansion interface{}
+
+type PersistentVolumeClaimExpansion interface{}
+
+type PodExpansion interface{}
+
+type PodTemplateExpansion interface{}
+
+type ReplicationControllerExpansion interface{}
+
+type ResourceQuotaExpansion interface{}
+
+type SecretExpansion interface{}
+
+type ServiceExpansion interface{}
+
+type ServiceAccountExpansion interface{}

pkg/client/typed/generated/legacy/unversioned/limitrange.go

@@ -35,6 +35,7 @@ type LimitRangeInterface interface {
 	Get(name string) (*api.LimitRange, error)
 	List(opts api.ListOptions) (*api.LimitRangeList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	LimitRangeExpansion
 }
 
 // limitRanges implements LimitRangeInterface

pkg/client/typed/generated/legacy/unversioned/namespace.go

@@ -35,6 +35,7 @@ type NamespaceInterface interface {
 	Get(name string) (*api.Namespace, error)
 	List(opts api.ListOptions) (*api.NamespaceList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	NamespaceExpansion
 }
 
 // namespaces implements NamespaceInterface

pkg/client/typed/generated/legacy/unversioned/node.go

@@ -35,6 +35,7 @@ type NodeInterface interface {
 	Get(name string) (*api.Node, error)
 	List(opts api.ListOptions) (*api.NodeList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	NodeExpansion
 }
 
 // nodes implements NodeInterface

pkg/client/typed/generated/legacy/unversioned/persistentvolume.go

@@ -35,6 +35,7 @@ type PersistentVolumeInterface interface {
 	Get(name string) (*api.PersistentVolume, error)
 	List(opts api.ListOptions) (*api.PersistentVolumeList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	PersistentVolumeExpansion
 }
 
 // persistentVolumes implements PersistentVolumeInterface

pkg/client/typed/generated/legacy/unversioned/persistentvolumeclaim.go

@@ -35,6 +35,7 @@ type PersistentVolumeClaimInterface interface {
 	Get(name string) (*api.PersistentVolumeClaim, error)
 	List(opts api.ListOptions) (*api.PersistentVolumeClaimList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	PersistentVolumeClaimExpansion
 }
 
 // persistentVolumeClaims implements PersistentVolumeClaimInterface

pkg/client/typed/generated/legacy/unversioned/pod.go

@@ -35,6 +35,7 @@ type PodInterface interface {
 	Get(name string) (*api.Pod, error)
 	List(opts api.ListOptions) (*api.PodList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	PodExpansion
 }
 
 // pods implements PodInterface

pkg/client/typed/generated/legacy/unversioned/podtemplate.go

@@ -35,6 +35,7 @@ type PodTemplateInterface interface {
 	Get(name string) (*api.PodTemplate, error)
 	List(opts api.ListOptions) (*api.PodTemplateList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	PodTemplateExpansion
 }
 
 // podTemplates implements PodTemplateInterface

pkg/client/typed/generated/legacy/unversioned/replicationcontroller.go

@@ -35,6 +35,7 @@ type ReplicationControllerInterface interface {
 	Get(name string) (*api.ReplicationController, error)
 	List(opts api.ListOptions) (*api.ReplicationControllerList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	ReplicationControllerExpansion
 }
 
 // replicationControllers implements ReplicationControllerInterface

pkg/client/typed/generated/legacy/unversioned/resourcequota.go

@@ -35,6 +35,7 @@ type ResourceQuotaInterface interface {
 	Get(name string) (*api.ResourceQuota, error)
 	List(opts api.ListOptions) (*api.ResourceQuotaList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	ResourceQuotaExpansion
 }
 
 // resourceQuotas implements ResourceQuotaInterface

pkg/client/typed/generated/legacy/unversioned/secret.go

@@ -35,6 +35,7 @@ type SecretInterface interface {
 	Get(name string) (*api.Secret, error)
 	List(opts api.ListOptions) (*api.SecretList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	SecretExpansion
 }
 
 // secrets implements SecretInterface

pkg/client/typed/generated/legacy/unversioned/service.go

@@ -35,6 +35,7 @@ type ServiceInterface interface {
 	Get(name string) (*api.Service, error)
 	List(opts api.ListOptions) (*api.ServiceList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	ServiceExpansion
 }
 
 // services implements ServiceInterface

pkg/client/typed/generated/legacy/unversioned/serviceaccount.go

@@ -35,6 +35,7 @@ type ServiceAccountInterface interface {
 	Get(name string) (*api.ServiceAccount, error)
 	List(opts api.ListOptions) (*api.ServiceAccountList, error)
 	Watch(opts api.ListOptions) (watch.Interface, error)
+	ServiceAccountExpansion
 }
 
 // serviceAccounts implements ServiceAccountInterface