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/*
Copyright 2017 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 scheme
import (
"fmt"
"io"
"os"
"path/filepath"
"strings"
"k8s.io/gengo/generator"
"k8s.io/gengo/namer"
"k8s.io/gengo/types"
"k8s.io/kubernetes/cmd/libs/go2idl/client-gen/path"
clientgentypes "k8s.io/kubernetes/cmd/libs/go2idl/client-gen/types"
)
// GenScheme produces a package for a clientset with the scheme, codecs and parameter codecs.
type GenScheme struct {
generator.DefaultGen
OutputPackage string
Groups []clientgentypes.GroupVersions
InputPackages map[clientgentypes.GroupVersion]string
OutputPath string
ImportTracker namer.ImportTracker
PrivateScheme bool
CreateRegistry bool
schemeGenerated bool
}
func (g *GenScheme) Namers(c *generator.Context) namer.NameSystems {
return namer.NameSystems{
"raw": namer.NewRawNamer(g.OutputPackage, g.ImportTracker),
}
}
// We only want to call GenerateType() once.
func (g *GenScheme) Filter(c *generator.Context, t *types.Type) bool {
ret := !g.schemeGenerated
g.schemeGenerated = true
return ret
}
func (g *GenScheme) Imports(c *generator.Context) (imports []string) {
imports = append(imports, g.ImportTracker.ImportLines()...)
for _, group := range g.Groups {
for _, version := range group.Versions {
packagePath := g.InputPackages[clientgentypes.GroupVersion{Group: group.Group, Version: version}]
if g.CreateRegistry {
// import the install package for internal clientsets instead of the type package with register.go
if version != "" {
packagePath = filepath.Dir(packagePath)
}
packagePath = filepath.Join(packagePath, "install")
imports = append(imports, strings.ToLower(fmt.Sprintf("%s \"%s\"", group.Group.NonEmpty(), path.Vendorless(packagePath))))
break
} else {
imports = append(imports, strings.ToLower(fmt.Sprintf("%s%s \"%s\"", group.Group.NonEmpty(), version.NonEmpty(), path.Vendorless(packagePath))))
}
}
}
return
}
func (g *GenScheme) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
sw := generator.NewSnippetWriter(w, c, "$", "$")
allGroupVersions := clientgentypes.ToGroupVersionPackages(g.Groups)
allInstallGroups := clientgentypes.ToGroupInstallPackages(g.Groups)
m := map[string]interface{}{
"allGroupVersions": allGroupVersions,
"allInstallGroups": allInstallGroups,
"customRegister": false,
"osGetenv": c.Universe.Function(types.Name{Package: "os", Name: "Getenv"}),
"runtimeNewParameterCodec": c.Universe.Function(types.Name{Package: "k8s.io/apimachinery/pkg/runtime", Name: "NewParameterCodec"}),
"runtimeNewScheme": c.Universe.Function(types.Name{Package: "k8s.io/apimachinery/pkg/runtime", Name: "NewScheme"}),
"serializerNewCodecFactory": c.Universe.Function(types.Name{Package: "k8s.io/apimachinery/pkg/runtime/serializer", Name: "NewCodecFactory"}),
"runtimeScheme": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/runtime", Name: "Scheme"}),
"schemaGroupVersion": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/runtime/schema", Name: "GroupVersion"}),
"metav1AddToGroupVersion": c.Universe.Function(types.Name{Package: "k8s.io/apimachinery/pkg/apis/meta/v1", Name: "AddToGroupVersion"}),
"announcedAPIGroupFactoryRegistry": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/apimachinery/announced", Name: "APIGroupFactoryRegistry"}),
"registeredNewOrDie": c.Universe.Function(types.Name{Package: "k8s.io/apimachinery/pkg/apimachinery/registered", Name: "NewOrDie"}),
"registeredAPIRegistrationManager": c.Universe.Type(types.Name{Package: "k8s.io/apimachinery/pkg/apimachinery/registered", Name: "APIRegistrationManager"}),
}
globals := map[string]string{
"Scheme": "Scheme",
"Codecs": "Codecs",
"ParameterCodec": "ParameterCodec",
"Registry": "Registry",
"GroupFactoryRegistry": "GroupFactoryRegistry",
}
for k, v := range globals {
if g.PrivateScheme {
m[k] = strings.ToLower(v[0:1]) + v[1:]
} else {
m[k] = v
}
}
sw.Do(globalsTemplate, m)
if g.OutputPath != "" {
if _, err := os.Stat(filepath.Join(g.OutputPath, strings.ToLower("register_custom.go"))); err == nil {
m["customRegister"] = true
}
}
if g.CreateRegistry {
sw.Do(registryRegistration, m)
} else {
sw.Do(simpleRegistration, m)
}
return sw.Error()
}
var globalsTemplate = `
var $.Scheme$ = $.runtimeNewScheme|raw$()
var $.Codecs$ = $.serializerNewCodecFactory|raw$($.Scheme$)
var $.ParameterCodec$ = $.runtimeNewParameterCodec|raw$($.Scheme$)
`
var registryRegistration = `
var $.Registry$ = $.registeredNewOrDie|raw$($.osGetenv|raw$("KUBE_API_VERSIONS"))
var $.GroupFactoryRegistry$ = make($.announcedAPIGroupFactoryRegistry|raw$)
func init() {
$.metav1AddToGroupVersion|raw$($.Scheme$, $.schemaGroupVersion|raw${Version: "v1"})
Install($.GroupFactoryRegistry$, $.Registry$, $.Scheme$)
}
// Install registers the API group and adds types to a scheme
func Install(groupFactoryRegistry $.announcedAPIGroupFactoryRegistry|raw$, registry *$.registeredAPIRegistrationManager|raw$, scheme *$.runtimeScheme|raw$) {
$range .allInstallGroups$ $.InstallPackageName$.Install(groupFactoryRegistry, registry, scheme)
$end$
$if .customRegister$ExtraInstall(groupFactoryRegistry, registry, scheme)$end$
}
`
var simpleRegistration = `
func init() {
$.metav1AddToGroupVersion|raw$($.Scheme$, $.schemaGroupVersion|raw${Version: "v1"})
AddToScheme($.Scheme$)
}
// AddToScheme adds all types of this clientset into the given scheme. This allows composition
// of clientsets, like in:
//
// import (
// "k8s.io/client-go/kubernetes"
// clientsetscheme "k8s.io/client-go/kuberentes/scheme"
// aggregatorclientsetscheme "k8s.io/kube-aggregator/pkg/client/clientset_generated/clientset/scheme"
// )
//
// kclientset, _ := kubernetes.NewForConfig(c)
// aggregatorclientsetscheme.AddToScheme(clientsetscheme.Scheme)
//
// After this, RawExtensions in Kubernetes types will serialize kube-aggregator types
// correctly.
func AddToScheme(scheme *$.runtimeScheme|raw$) {
$range .allGroupVersions$ $.PackageName$.AddToScheme(scheme)
$end$
$if .customRegister$ExtraAddToScheme(scheme)$end$
}
`
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