move resource builder to generic options

pkg/kubectl/genericclioptions/resource/interfaces.go

@@ -0,0 +1,85 @@
+/*
+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 resource
+
+import (
+	"k8s.io/apimachinery/pkg/api/meta"
+	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/client-go/discovery"
+	"k8s.io/client-go/rest"
+)
+
+type RESTClientGetter interface {
+	ToRESTConfig() (*rest.Config, error)
+	ToDiscoveryClient() (discovery.CachedDiscoveryInterface, error)
+	ToRESTMapper() (meta.RESTMapper, error)
+}
+
+type ClientConfigFunc func() (*rest.Config, error)
+
+// RESTClient is a client helper for dealing with RESTful resources
+// in a generic way.
+type RESTClient interface {
+	Get() *rest.Request
+	Post() *rest.Request
+	Patch(types.PatchType) *rest.Request
+	Delete() *rest.Request
+	Put() *rest.Request
+}
+
+// RequestTransform is a function that is given a chance to modify the outgoing request.
+type RequestTransform func(*rest.Request)
+
+// NewClientWithOptions wraps the provided RESTClient and invokes each transform on each
+// newly created request.
+func NewClientWithOptions(c RESTClient, transforms ...RequestTransform) RESTClient {
+	return &clientOptions{c: c, transforms: transforms}
+}
+
+type clientOptions struct {
+	c          RESTClient
+	transforms []RequestTransform
+}
+
+func (c *clientOptions) modify(req *rest.Request) *rest.Request {
+	for _, transform := range c.transforms {
+		transform(req)
+	}
+	return req
+}
+
+func (c *clientOptions) Get() *rest.Request {
+	return c.modify(c.c.Get())
+}
+
+func (c *clientOptions) Post() *rest.Request {
+	return c.modify(c.c.Post())
+}
+func (c *clientOptions) Patch(t types.PatchType) *rest.Request {
+	return c.modify(c.c.Patch(t))
+}
+func (c *clientOptions) Delete() *rest.Request {
+	return c.modify(c.c.Delete())
+}
+func (c *clientOptions) Put() *rest.Request {
+	return c.modify(c.c.Put())
+}
+
+// ContentValidator is an interface that knows how to validate an API object serialized to a byte array.
+type ContentValidator interface {
+	ValidateBytes(data []byte) error
+}