292 lines
9.8 KiB
Go
292 lines
9.8 KiB
Go
/*
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Copyright 2016 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 generators
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import (
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"fmt"
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"path/filepath"
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"strings"
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"k8s.io/gengo/args"
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"k8s.io/gengo/generator"
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"k8s.io/gengo/namer"
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"k8s.io/gengo/types"
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clientgentypes "k8s.io/kubernetes/cmd/libs/go2idl/client-gen/types"
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"github.com/golang/glog"
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"github.com/spf13/pflag"
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)
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// NameSystems returns the name system used by the generators in this package.
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func NameSystems() namer.NameSystems {
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pluralExceptions := map[string]string{
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"Endpoints": "Endpoints",
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}
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return namer.NameSystems{
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"public": namer.NewPublicNamer(0),
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"private": namer.NewPrivateNamer(0),
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"raw": namer.NewRawNamer("", nil),
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"publicPlural": namer.NewPublicPluralNamer(pluralExceptions),
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"allLowercasePlural": namer.NewAllLowercasePluralNamer(pluralExceptions),
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"lowercaseSingular": &lowercaseSingularNamer{},
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}
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}
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// lowercaseSingularNamer implements Namer
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type lowercaseSingularNamer struct{}
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// Name returns t's name in all lowercase.
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func (n *lowercaseSingularNamer) Name(t *types.Type) string {
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return strings.ToLower(t.Name.Name)
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}
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// DefaultNameSystem returns the default name system for ordering the types to be
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// processed by the generators in this package.
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func DefaultNameSystem() string {
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return "public"
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}
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// generatedBy returns information about the arguments used to invoke
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// lister-gen.
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func generatedBy() string {
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var cmdArgs string
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pflag.VisitAll(func(f *pflag.Flag) {
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if !f.Changed || f.Name == "verify-only" {
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return
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}
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cmdArgs += fmt.Sprintf("--%s=%s ", f.Name, f.Value)
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})
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return fmt.Sprintf("\n// This file was automatically generated by informer-gen with arguments: %s\n\n", cmdArgs)
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}
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// objectMetaForPackage returns the type of ObjectMeta used by package p.
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func objectMetaForPackage(p *types.Package) (*types.Type, error) {
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generatingForPackage := false
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for _, t := range p.Types {
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// filter out types which dont have genclient=true.
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if extractBoolTagOrDie("genclient", t.SecondClosestCommentLines) == false {
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continue
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}
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generatingForPackage = true
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for _, member := range t.Members {
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if member.Name == "ObjectMeta" {
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return member.Type, nil
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}
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}
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}
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if generatingForPackage {
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return nil, fmt.Errorf("unable to find ObjectMeta for any types in package %s", p.Path)
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}
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return nil, nil
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}
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// isInternal returns true if t's package is k8s.io/kubernetes/pkg/api.
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func isInternal(t *types.Type) bool {
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return t.Name.Package == "k8s.io/kubernetes/pkg/api"
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}
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func packageForGroup(base string, group clientgentypes.Group) string {
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return filepath.Join(base, group.NonEmpty())
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}
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// Packages makes the client package definition.
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func Packages(context *generator.Context, arguments *args.GeneratorArgs) generator.Packages {
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boilerplate, err := arguments.LoadGoBoilerplate()
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if err != nil {
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glog.Fatalf("Failed loading boilerplate: %v", err)
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}
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boilerplate = append(boilerplate, []byte(generatedBy())...)
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customArgs, ok := arguments.CustomArgs.(*CustomArgs)
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if !ok {
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glog.Fatalf("Wrong CustomArgs type: %T", arguments.CustomArgs)
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}
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var packageList generator.Packages
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typesForGroupVersion := make(map[clientgentypes.GroupVersion][]*types.Type)
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groupVersions := make(map[string]clientgentypes.GroupVersions)
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for _, inputDir := range arguments.InputDirs {
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p := context.Universe.Package(inputDir)
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objectMeta, err := objectMetaForPackage(p)
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if err != nil {
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glog.Fatal(err)
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}
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if objectMeta == nil {
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// no types in this package had genclient
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continue
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}
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var gv clientgentypes.GroupVersion
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if isInternal(objectMeta) {
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lastSlash := strings.LastIndex(p.Path, "/")
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if lastSlash == -1 {
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glog.Fatalf("error constructing internal group version for package %q", p.Path)
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}
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gv.Group = clientgentypes.Group(p.Path[lastSlash+1:])
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} else {
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parts := strings.Split(p.Path, "/")
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gv.Group = clientgentypes.Group(parts[len(parts)-2])
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gv.Version = clientgentypes.Version(parts[len(parts)-1])
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}
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var typesToGenerate []*types.Type
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for _, t := range p.Types {
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// filter out types which dont have genclient=true.
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if extractBoolTagOrDie("genclient", t.SecondClosestCommentLines) == false {
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continue
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}
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// filter out types which have noMethods
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if extractBoolTagOrDie("noMethods", t.SecondClosestCommentLines) == true {
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continue
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}
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typesToGenerate = append(typesToGenerate, t)
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if _, ok := typesForGroupVersion[gv]; !ok {
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typesForGroupVersion[gv] = []*types.Type{}
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}
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typesForGroupVersion[gv] = append(typesForGroupVersion[gv], t)
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}
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if len(typesToGenerate) == 0 {
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continue
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}
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icGroupName := namer.IC(gv.Group.NonEmpty())
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groupVersionsEntry, ok := groupVersions[icGroupName]
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if !ok {
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groupVersionsEntry = clientgentypes.GroupVersions{
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Group: gv.Group,
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}
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}
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groupVersionsEntry.Versions = append(groupVersionsEntry.Versions, gv.Version)
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groupVersions[icGroupName] = groupVersionsEntry
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orderer := namer.Orderer{Namer: namer.NewPrivateNamer(0)}
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typesToGenerate = orderer.OrderTypes(typesToGenerate)
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packageList = append(packageList, versionPackage(arguments.OutputPackagePath, gv, boilerplate, typesToGenerate, customArgs.InternalClientSetPackage, customArgs.VersionedClientSetPackage, customArgs.ListersPackage))
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}
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packageList = append(packageList, factoryPackage(arguments.OutputPackagePath, boilerplate, groupVersions, customArgs.InternalClientSetPackage, customArgs.VersionedClientSetPackage, typesForGroupVersion))
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for _, groupVersionsEntry := range groupVersions {
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packageList = append(packageList, groupPackage(arguments.OutputPackagePath, groupVersionsEntry, boilerplate))
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}
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return packageList
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}
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func factoryPackage(basePackage string, boilerplate []byte, groupVersions map[string]clientgentypes.GroupVersions, internalClientSetPackage, versionedClientSetPackage string, typesForGroupVersion map[clientgentypes.GroupVersion][]*types.Type) generator.Package {
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return &generator.DefaultPackage{
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PackageName: filepath.Base(basePackage),
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PackagePath: basePackage,
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HeaderText: boilerplate,
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GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
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generators = append(generators, &factoryGenerator{
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DefaultGen: generator.DefaultGen{
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OptionalName: "factory",
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},
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outputPackage: basePackage,
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imports: generator.NewImportTracker(),
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groupVersions: groupVersions,
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internalClientSetPackage: internalClientSetPackage,
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versionedClientSetPackage: versionedClientSetPackage,
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})
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generators = append(generators, &genericGenerator{
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DefaultGen: generator.DefaultGen{
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OptionalName: "generic",
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},
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outputPackage: basePackage,
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imports: generator.NewImportTracker(),
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groupVersions: groupVersions,
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typesForGroupVersion: typesForGroupVersion,
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})
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return generators
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},
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}
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}
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func groupPackage(basePackage string, groupVersions clientgentypes.GroupVersions, boilerplate []byte) generator.Package {
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packagePath := filepath.Join(basePackage, strings.ToLower(groupVersions.Group.NonEmpty()))
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return &generator.DefaultPackage{
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PackageName: strings.ToLower(groupVersions.Group.NonEmpty()),
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PackagePath: packagePath,
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HeaderText: boilerplate,
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GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
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generators = append(generators, &groupInterfaceGenerator{
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DefaultGen: generator.DefaultGen{
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OptionalName: "interface",
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},
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outputPackage: packagePath,
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groupVersions: groupVersions,
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imports: generator.NewImportTracker(),
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})
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return generators
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},
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FilterFunc: func(c *generator.Context, t *types.Type) bool {
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// piggy-back on types that are tagged for client-gen
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return extractBoolTagOrDie("genclient", t.SecondClosestCommentLines) == true
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},
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}
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}
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func versionPackage(basePackage string, gv clientgentypes.GroupVersion, boilerplate []byte, typesToGenerate []*types.Type, internalClientSetPackage, versionedClientSetPackage, listersPackage string) generator.Package {
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packagePath := filepath.Join(basePackage, strings.ToLower(gv.Group.NonEmpty()), strings.ToLower(gv.Version.NonEmpty()))
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return &generator.DefaultPackage{
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PackageName: strings.ToLower(gv.Version.NonEmpty()),
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PackagePath: packagePath,
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HeaderText: boilerplate,
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GeneratorFunc: func(c *generator.Context) (generators []generator.Generator) {
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generators = append(generators, &versionInterfaceGenerator{
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DefaultGen: generator.DefaultGen{
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OptionalName: "interface",
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},
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outputPackage: packagePath,
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imports: generator.NewImportTracker(),
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types: typesToGenerate,
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})
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for _, t := range typesToGenerate {
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generators = append(generators, &informerGenerator{
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DefaultGen: generator.DefaultGen{
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OptionalName: strings.ToLower(t.Name.Name),
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},
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outputPackage: packagePath,
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groupVersion: gv,
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typeToGenerate: t,
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imports: generator.NewImportTracker(),
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internalClientSetPackage: internalClientSetPackage,
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versionedClientSetPackage: versionedClientSetPackage,
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listersPackage: listersPackage,
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})
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}
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return generators
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},
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FilterFunc: func(c *generator.Context, t *types.Type) bool {
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// piggy-back on types that are tagged for client-gen
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return extractBoolTagOrDie("genclient", t.SecondClosestCommentLines) == true
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},
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}
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}
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