mirror of
https://github.com/ceph/ceph-csi.git
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95 lines
3.1 KiB
Go
95 lines
3.1 KiB
Go
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/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package scheme contains utilities for gradually building Schemes,
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// which contain information associating Go types with Kubernetes
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// groups, versions, and kinds.
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//
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// Each API group should define a utility function
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// called AddToScheme for adding its types to a Scheme:
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//
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// // in package myapigroupv1...
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// var (
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// SchemeGroupVersion = schema.GroupVersion{Group: "my.api.group", Version: "v1"}
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// SchemeBuilder = &scheme.Builder{GroupVersion: SchemeGroupVersion}
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// AddToScheme = SchemeBuilder.AddToScheme
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// )
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//
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// func init() {
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// SchemeBuilder.Register(&MyType{}, &MyTypeList)
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// }
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// var (
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// scheme *runtime.Scheme = runtime.NewScheme()
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// )
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//
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// This also true of the built-in Kubernetes types. Then, in the entrypoint for
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// your manager, assemble the scheme containing exactly the types you need,
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// panicing if scheme registration failed. For instance, if our controller needs
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// types from the core/v1 API group (e.g. Pod), plus types from my.api.group/v1:
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//
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// func init() {
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// utilruntime.Must(myapigroupv1.AddToScheme(scheme))
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// utilruntime.Must(kubernetesscheme.AddToScheme(scheme))
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// }
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//
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// func main() {
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// mgr := controllers.NewManager(context.Background(), controllers.GetConfigOrDie(), manager.Options{
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// Scheme: scheme,
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// })
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// // ...
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// }
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//
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package scheme
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import (
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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// Builder builds a new Scheme for mapping go types to Kubernetes GroupVersionKinds.
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type Builder struct {
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GroupVersion schema.GroupVersion
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runtime.SchemeBuilder
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}
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// Register adds one or more objects to the SchemeBuilder so they can be added to a Scheme. Register mutates bld.
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func (bld *Builder) Register(object ...runtime.Object) *Builder {
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bld.SchemeBuilder.Register(func(scheme *runtime.Scheme) error {
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scheme.AddKnownTypes(bld.GroupVersion, object...)
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metav1.AddToGroupVersion(scheme, bld.GroupVersion)
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return nil
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})
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return bld
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}
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// RegisterAll registers all types from the Builder argument. RegisterAll mutates bld.
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func (bld *Builder) RegisterAll(b *Builder) *Builder {
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bld.SchemeBuilder = append(bld.SchemeBuilder, b.SchemeBuilder...)
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return bld
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}
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// AddToScheme adds all registered types to s.
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func (bld *Builder) AddToScheme(s *runtime.Scheme) error {
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return bld.SchemeBuilder.AddToScheme(s)
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}
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// Build returns a new Scheme containing the registered types.
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func (bld *Builder) Build() (*runtime.Scheme, error) {
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s := runtime.NewScheme()
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return s, bld.AddToScheme(s)
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}
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