600 lines
20 KiB
Go
600 lines
20 KiB
Go
/*
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Copyright 2015 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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"io"
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"path/filepath"
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"strings"
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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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"k8s.io/code-generator/cmd/client-gen/generators/util"
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)
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// genClientForType produces a file for each top-level type.
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type genClientForType struct {
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generator.DefaultGen
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outputPackage string
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clientsetPackage string
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group string
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version string
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groupGoName string
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typeToMatch *types.Type
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imports namer.ImportTracker
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}
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var _ generator.Generator = &genClientForType{}
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// Filter ignores all but one type because we're making a single file per type.
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func (g *genClientForType) Filter(c *generator.Context, t *types.Type) bool { return t == g.typeToMatch }
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func (g *genClientForType) Namers(c *generator.Context) namer.NameSystems {
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return namer.NameSystems{
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"raw": namer.NewRawNamer(g.outputPackage, g.imports),
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}
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}
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func (g *genClientForType) Imports(c *generator.Context) (imports []string) {
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return g.imports.ImportLines()
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}
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// Ideally, we'd like genStatus to return true if there is a subresource path
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// registered for "status" in the API server, but we do not have that
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// information, so genStatus returns true if the type has a status field.
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func genStatus(t *types.Type) bool {
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// Default to true if we have a Status member
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hasStatus := false
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for _, m := range t.Members {
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if m.Name == "Status" {
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hasStatus = true
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break
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}
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}
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return hasStatus && !util.MustParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...)).NoStatus
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}
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// GenerateType makes the body of a file implementing the individual typed client for type t.
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func (g *genClientForType) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
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sw := generator.NewSnippetWriter(w, c, "$", "$")
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pkg := filepath.Base(t.Name.Package)
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tags, err := util.ParseClientGenTags(append(t.SecondClosestCommentLines, t.CommentLines...))
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if err != nil {
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return err
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}
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type extendedInterfaceMethod struct {
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template string
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args map[string]interface{}
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}
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extendedMethods := []extendedInterfaceMethod{}
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for _, e := range tags.Extensions {
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inputType := *t
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resultType := *t
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// TODO: Extract this to some helper method as this code is copied into
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// 2 other places.
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if len(e.InputTypeOverride) > 0 {
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if name, pkg := e.Input(); len(pkg) > 0 {
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newType := c.Universe.Type(types.Name{Package: pkg, Name: name})
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inputType = *newType
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} else {
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inputType.Name.Name = e.InputTypeOverride
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}
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}
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if len(e.ResultTypeOverride) > 0 {
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if name, pkg := e.Result(); len(pkg) > 0 {
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newType := c.Universe.Type(types.Name{Package: pkg, Name: name})
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resultType = *newType
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} else {
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resultType.Name.Name = e.ResultTypeOverride
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}
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}
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var updatedVerbtemplate string
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if _, exists := subresourceDefaultVerbTemplates[e.VerbType]; e.IsSubresource() && exists {
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updatedVerbtemplate = e.VerbName + "(" + strings.TrimPrefix(subresourceDefaultVerbTemplates[e.VerbType], strings.Title(e.VerbType)+"(")
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} else {
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updatedVerbtemplate = e.VerbName + "(" + strings.TrimPrefix(defaultVerbTemplates[e.VerbType], strings.Title(e.VerbType)+"(")
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}
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extendedMethods = append(extendedMethods, extendedInterfaceMethod{
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template: updatedVerbtemplate,
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args: map[string]interface{}{
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"type": t,
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"inputType": &inputType,
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"resultType": &resultType,
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"DeleteOptions": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/apis/meta/v1", Name: "DeleteOptions"}),
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"ListOptions": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/apis/meta/v1", Name: "ListOptions"}),
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"GetOptions": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/apis/meta/v1", Name: "GetOptions"}),
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"PatchType": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/types", Name: "PatchType"}),
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},
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})
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}
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m := map[string]interface{}{
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"type": t,
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"inputType": t,
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"resultType": t,
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"package": pkg,
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"Package": namer.IC(pkg),
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"namespaced": !tags.NonNamespaced,
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"Group": namer.IC(g.group),
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"subresource": false,
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"subresourcePath": "",
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"GroupGoName": g.groupGoName,
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"Version": namer.IC(g.version),
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"DeleteOptions": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/apis/meta/v1", Name: "DeleteOptions"}),
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"ListOptions": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/apis/meta/v1", Name: "ListOptions"}),
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"GetOptions": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/apis/meta/v1", Name: "GetOptions"}),
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"PatchType": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/types", Name: "PatchType"}),
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"watchInterface": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/watch", Name: "Interface"}),
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"RESTClientInterface": c.Universe.Type(types.Name{Package: "k8s.io/client-go/rest", Name: "Interface"}),
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"schemeParameterCodec": c.Universe.Variable(types.Name{Package: filepath.Join(g.clientsetPackage, "scheme"), Name: "ParameterCodec"}),
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}
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sw.Do(getterComment, m)
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if tags.NonNamespaced {
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sw.Do(getterNonNamespaced, m)
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} else {
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sw.Do(getterNamespaced, m)
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}
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sw.Do(interfaceTemplate1, m)
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if !tags.NoVerbs {
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if !genStatus(t) {
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tags.SkipVerbs = append(tags.SkipVerbs, "updateStatus")
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}
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interfaceSuffix := ""
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if len(extendedMethods) > 0 {
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interfaceSuffix = "\n"
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}
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sw.Do("\n"+generateInterface(tags)+interfaceSuffix, m)
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// add extended verbs into interface
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for _, v := range extendedMethods {
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sw.Do(v.template+interfaceSuffix, v.args)
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}
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}
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sw.Do(interfaceTemplate4, m)
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if tags.NonNamespaced {
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sw.Do(structNonNamespaced, m)
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sw.Do(newStructNonNamespaced, m)
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} else {
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sw.Do(structNamespaced, m)
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sw.Do(newStructNamespaced, m)
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}
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if tags.NoVerbs {
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return sw.Error()
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}
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if tags.HasVerb("get") {
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sw.Do(getTemplate, m)
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}
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if tags.HasVerb("list") {
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sw.Do(listTemplate, m)
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}
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if tags.HasVerb("watch") {
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sw.Do(watchTemplate, m)
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}
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if tags.HasVerb("create") {
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sw.Do(createTemplate, m)
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}
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if tags.HasVerb("update") {
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sw.Do(updateTemplate, m)
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}
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if tags.HasVerb("updateStatus") {
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sw.Do(updateStatusTemplate, m)
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}
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if tags.HasVerb("delete") {
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sw.Do(deleteTemplate, m)
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}
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if tags.HasVerb("deleteCollection") {
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sw.Do(deleteCollectionTemplate, m)
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}
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if tags.HasVerb("patch") {
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sw.Do(patchTemplate, m)
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}
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// generate expansion methods
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for _, e := range tags.Extensions {
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inputType := *t
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resultType := *t
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if len(e.InputTypeOverride) > 0 {
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if name, pkg := e.Input(); len(pkg) > 0 {
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newType := c.Universe.Type(types.Name{Package: pkg, Name: name})
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inputType = *newType
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} else {
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inputType.Name.Name = e.InputTypeOverride
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}
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}
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if len(e.ResultTypeOverride) > 0 {
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if name, pkg := e.Result(); len(pkg) > 0 {
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newType := c.Universe.Type(types.Name{Package: pkg, Name: name})
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resultType = *newType
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} else {
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resultType.Name.Name = e.ResultTypeOverride
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}
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}
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m["inputType"] = &inputType
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m["resultType"] = &resultType
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m["subresourcePath"] = e.SubResourcePath
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if e.HasVerb("get") {
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if e.IsSubresource() {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, getSubresourceTemplate), m)
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} else {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, getTemplate), m)
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}
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}
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if e.HasVerb("list") {
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if e.IsSubresource() {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, listSubresourceTemplate), m)
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} else {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, listTemplate), m)
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}
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}
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// TODO: Figure out schemantic for watching a sub-resource.
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if e.HasVerb("watch") {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, watchTemplate), m)
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}
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if e.HasVerb("create") {
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if e.IsSubresource() {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, createSubresourceTemplate), m)
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} else {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, createTemplate), m)
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}
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}
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if e.HasVerb("update") {
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if e.IsSubresource() {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, updateSubresourceTemplate), m)
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} else {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, updateTemplate), m)
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}
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}
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// TODO: Figure out schemantic for deleting a sub-resource (what arguments
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// are passed, does it need two names? etc.
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if e.HasVerb("delete") {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, deleteTemplate), m)
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}
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if e.HasVerb("patch") {
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sw.Do(adjustTemplate(e.VerbName, e.VerbType, patchTemplate), m)
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}
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}
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return sw.Error()
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}
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// adjustTemplate adjust the origin verb template using the expansion name.
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// TODO: Make the verbs in templates parametrized so the strings.Replace() is
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// not needed.
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func adjustTemplate(name, verbType, template string) string {
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return strings.Replace(template, " "+strings.Title(verbType), " "+name, -1)
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}
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func generateInterface(tags util.Tags) string {
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// need an ordered list here to guarantee order of generated methods.
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out := []string{}
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for _, m := range util.SupportedVerbs {
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if tags.HasVerb(m) {
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out = append(out, defaultVerbTemplates[m])
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}
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}
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return strings.Join(out, "\n")
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}
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var subresourceDefaultVerbTemplates = map[string]string{
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"create": `Create($.type|private$Name string, $.inputType|private$ *$.inputType|raw$) (*$.resultType|raw$, error)`,
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"list": `List($.type|private$Name string, opts $.ListOptions|raw$) (*$.resultType|raw$List, error)`,
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"update": `Update($.type|private$Name string, $.inputType|private$ *$.inputType|raw$) (*$.resultType|raw$, error)`,
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"get": `Get($.type|private$Name string, options $.GetOptions|raw$) (*$.resultType|raw$, error)`,
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}
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var defaultVerbTemplates = map[string]string{
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"create": `Create(*$.inputType|raw$) (*$.resultType|raw$, error)`,
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"update": `Update(*$.inputType|raw$) (*$.resultType|raw$, error)`,
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"updateStatus": `UpdateStatus(*$.type|raw$) (*$.type|raw$, error)`,
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"delete": `Delete(name string, options *$.DeleteOptions|raw$) error`,
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"deleteCollection": `DeleteCollection(options *$.DeleteOptions|raw$, listOptions $.ListOptions|raw$) error`,
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"get": `Get(name string, options $.GetOptions|raw$) (*$.resultType|raw$, error)`,
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"list": `List(opts $.ListOptions|raw$) (*$.resultType|raw$List, error)`,
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"watch": `Watch(opts $.ListOptions|raw$) ($.watchInterface|raw$, error)`,
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"patch": `Patch(name string, pt $.PatchType|raw$, data []byte, subresources ...string) (result *$.resultType|raw$, err error)`,
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}
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// group client will implement this interface.
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var getterComment = `
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// $.type|publicPlural$Getter has a method to return a $.type|public$Interface.
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// A group's client should implement this interface.`
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var getterNamespaced = `
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type $.type|publicPlural$Getter interface {
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$.type|publicPlural$(namespace string) $.type|public$Interface
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}
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`
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var getterNonNamespaced = `
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type $.type|publicPlural$Getter interface {
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$.type|publicPlural$() $.type|public$Interface
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}
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`
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// this type's interface, typed client will implement this interface.
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var interfaceTemplate1 = `
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// $.type|public$Interface has methods to work with $.type|public$ resources.
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type $.type|public$Interface interface {`
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var interfaceTemplate4 = `
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$.type|public$Expansion
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}
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`
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// template for the struct that implements the type's interface
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var structNamespaced = `
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// $.type|privatePlural$ implements $.type|public$Interface
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type $.type|privatePlural$ struct {
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client $.RESTClientInterface|raw$
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ns string
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}
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`
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// template for the struct that implements the type's interface
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var structNonNamespaced = `
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// $.type|privatePlural$ implements $.type|public$Interface
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type $.type|privatePlural$ struct {
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client $.RESTClientInterface|raw$
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}
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`
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var newStructNamespaced = `
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// new$.type|publicPlural$ returns a $.type|publicPlural$
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func new$.type|publicPlural$(c *$.GroupGoName$$.Version$Client, namespace string) *$.type|privatePlural$ {
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return &$.type|privatePlural${
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client: c.RESTClient(),
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ns: namespace,
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}
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}
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`
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var newStructNonNamespaced = `
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// new$.type|publicPlural$ returns a $.type|publicPlural$
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func new$.type|publicPlural$(c *$.GroupGoName$$.Version$Client) *$.type|privatePlural$ {
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return &$.type|privatePlural${
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client: c.RESTClient(),
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}
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}
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`
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var listTemplate = `
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// List takes label and field selectors, and returns the list of $.resultType|publicPlural$ that match those selectors.
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func (c *$.type|privatePlural$) List(opts $.ListOptions|raw$) (result *$.resultType|raw$List, err error) {
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var timeout time.Duration
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if opts.TimeoutSeconds != nil{
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timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
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}
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result = &$.resultType|raw$List{}
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err = c.client.Get().
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$if .namespaced$Namespace(c.ns).$end$
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Resource("$.type|resource$").
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VersionedParams(&opts, $.schemeParameterCodec|raw$).
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Timeout(timeout).
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Do().
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Into(result)
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return
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}
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`
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var listSubresourceTemplate = `
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// List takes $.type|raw$ name, label and field selectors, and returns the list of $.resultType|publicPlural$ that match those selectors.
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func (c *$.type|privatePlural$) List($.type|private$Name string, opts $.ListOptions|raw$) (result *$.resultType|raw$List, err error) {
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var timeout time.Duration
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if opts.TimeoutSeconds != nil{
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timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
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}
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result = &$.resultType|raw$List{}
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err = c.client.Get().
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$if .namespaced$Namespace(c.ns).$end$
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Resource("$.type|resource$").
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Name($.type|private$Name).
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SubResource("$.subresourcePath$").
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VersionedParams(&opts, $.schemeParameterCodec|raw$).
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Timeout(timeout).
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Do().
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Into(result)
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return
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}
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`
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var getTemplate = `
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// Get takes name of the $.type|private$, and returns the corresponding $.resultType|private$ object, and an error if there is any.
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func (c *$.type|privatePlural$) Get(name string, options $.GetOptions|raw$) (result *$.resultType|raw$, err error) {
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result = &$.resultType|raw${}
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err = c.client.Get().
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$if .namespaced$Namespace(c.ns).$end$
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Resource("$.type|resource$").
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Name(name).
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VersionedParams(&options, $.schemeParameterCodec|raw$).
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Do().
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Into(result)
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return
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}
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`
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var getSubresourceTemplate = `
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// Get takes name of the $.type|private$, and returns the corresponding $.resultType|raw$ object, and an error if there is any.
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func (c *$.type|privatePlural$) Get($.type|private$Name string, options $.GetOptions|raw$) (result *$.resultType|raw$, err error) {
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result = &$.resultType|raw${}
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err = c.client.Get().
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$if .namespaced$Namespace(c.ns).$end$
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Resource("$.type|resource$").
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Name($.type|private$Name).
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SubResource("$.subresourcePath$").
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VersionedParams(&options, $.schemeParameterCodec|raw$).
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Do().
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Into(result)
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return
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}
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`
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var deleteTemplate = `
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// Delete takes name of the $.type|private$ and deletes it. Returns an error if one occurs.
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func (c *$.type|privatePlural$) Delete(name string, options *$.DeleteOptions|raw$) error {
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return c.client.Delete().
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$if .namespaced$Namespace(c.ns).$end$
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Resource("$.type|resource$").
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Name(name).
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Body(options).
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Do().
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Error()
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}
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`
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var deleteCollectionTemplate = `
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// DeleteCollection deletes a collection of objects.
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func (c *$.type|privatePlural$) DeleteCollection(options *$.DeleteOptions|raw$, listOptions $.ListOptions|raw$) error {
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var timeout time.Duration
|
|
if listOptions.TimeoutSeconds != nil{
|
|
timeout = time.Duration(*listOptions.TimeoutSeconds) * time.Second
|
|
}
|
|
return c.client.Delete().
|
|
$if .namespaced$Namespace(c.ns).$end$
|
|
Resource("$.type|resource$").
|
|
VersionedParams(&listOptions, $.schemeParameterCodec|raw$).
|
|
Timeout(timeout).
|
|
Body(options).
|
|
Do().
|
|
Error()
|
|
}
|
|
`
|
|
|
|
var createSubresourceTemplate = `
|
|
// Create takes the representation of a $.inputType|private$ and creates it. Returns the server's representation of the $.resultType|private$, and an error, if there is any.
|
|
func (c *$.type|privatePlural$) Create($.type|private$Name string, $.inputType|private$ *$.inputType|raw$) (result *$.resultType|raw$, err error) {
|
|
result = &$.resultType|raw${}
|
|
err = c.client.Post().
|
|
$if .namespaced$Namespace(c.ns).$end$
|
|
Resource("$.type|resource$").
|
|
Name($.type|private$Name).
|
|
SubResource("$.subresourcePath$").
|
|
Body($.inputType|private$).
|
|
Do().
|
|
Into(result)
|
|
return
|
|
}
|
|
`
|
|
|
|
var createTemplate = `
|
|
// Create takes the representation of a $.inputType|private$ and creates it. Returns the server's representation of the $.resultType|private$, and an error, if there is any.
|
|
func (c *$.type|privatePlural$) Create($.inputType|private$ *$.inputType|raw$) (result *$.resultType|raw$, err error) {
|
|
result = &$.resultType|raw${}
|
|
err = c.client.Post().
|
|
$if .namespaced$Namespace(c.ns).$end$
|
|
Resource("$.type|resource$").
|
|
Body($.inputType|private$).
|
|
Do().
|
|
Into(result)
|
|
return
|
|
}
|
|
`
|
|
|
|
var updateSubresourceTemplate = `
|
|
// Update takes the top resource name and the representation of a $.inputType|private$ and updates it. Returns the server's representation of the $.resultType|private$, and an error, if there is any.
|
|
func (c *$.type|privatePlural$) Update($.type|private$Name string, $.inputType|private$ *$.inputType|raw$) (result *$.resultType|raw$, err error) {
|
|
result = &$.resultType|raw${}
|
|
err = c.client.Put().
|
|
$if .namespaced$Namespace(c.ns).$end$
|
|
Resource("$.type|resource$").
|
|
Name($.type|private$Name).
|
|
SubResource("$.subresourcePath$").
|
|
Body($.inputType|private$).
|
|
Do().
|
|
Into(result)
|
|
return
|
|
}
|
|
`
|
|
|
|
var updateTemplate = `
|
|
// Update takes the representation of a $.inputType|private$ and updates it. Returns the server's representation of the $.resultType|private$, and an error, if there is any.
|
|
func (c *$.type|privatePlural$) Update($.inputType|private$ *$.inputType|raw$) (result *$.resultType|raw$, err error) {
|
|
result = &$.resultType|raw${}
|
|
err = c.client.Put().
|
|
$if .namespaced$Namespace(c.ns).$end$
|
|
Resource("$.type|resource$").
|
|
Name($.inputType|private$.Name).
|
|
Body($.inputType|private$).
|
|
Do().
|
|
Into(result)
|
|
return
|
|
}
|
|
`
|
|
|
|
var updateStatusTemplate = `
|
|
// UpdateStatus was generated because the type contains a Status member.
|
|
// Add a +genclient:noStatus comment above the type to avoid generating UpdateStatus().
|
|
|
|
func (c *$.type|privatePlural$) UpdateStatus($.type|private$ *$.type|raw$) (result *$.type|raw$, err error) {
|
|
result = &$.type|raw${}
|
|
err = c.client.Put().
|
|
$if .namespaced$Namespace(c.ns).$end$
|
|
Resource("$.type|resource$").
|
|
Name($.type|private$.Name).
|
|
SubResource("status").
|
|
Body($.type|private$).
|
|
Do().
|
|
Into(result)
|
|
return
|
|
}
|
|
`
|
|
|
|
var watchTemplate = `
|
|
// Watch returns a $.watchInterface|raw$ that watches the requested $.type|privatePlural$.
|
|
func (c *$.type|privatePlural$) Watch(opts $.ListOptions|raw$) ($.watchInterface|raw$, error) {
|
|
var timeout time.Duration
|
|
if opts.TimeoutSeconds != nil{
|
|
timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
|
|
}
|
|
opts.Watch = true
|
|
return c.client.Get().
|
|
$if .namespaced$Namespace(c.ns).$end$
|
|
Resource("$.type|resource$").
|
|
VersionedParams(&opts, $.schemeParameterCodec|raw$).
|
|
Timeout(timeout).
|
|
Watch()
|
|
}
|
|
`
|
|
|
|
var patchTemplate = `
|
|
// Patch applies the patch and returns the patched $.resultType|private$.
|
|
func (c *$.type|privatePlural$) Patch(name string, pt $.PatchType|raw$, data []byte, subresources ...string) (result *$.resultType|raw$, err error) {
|
|
result = &$.resultType|raw${}
|
|
err = c.client.Patch(pt).
|
|
$if .namespaced$Namespace(c.ns).$end$
|
|
Resource("$.type|resource$").
|
|
SubResource(subresources...).
|
|
Name(name).
|
|
Body(data).
|
|
Do().
|
|
Into(result)
|
|
return
|
|
}
|
|
`
|