mirror of https://github.com/knative/pkg.git
138 lines
4.5 KiB
Go
138 lines
4.5 KiB
Go
/*
|
|
Copyright 2019 The Knative 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 informers
|
|
|
|
import (
|
|
"io"
|
|
|
|
clientgentypes "k8s.io/code-generator/cmd/client-gen/types"
|
|
"k8s.io/gengo/v2/generator"
|
|
"k8s.io/gengo/v2/namer"
|
|
"k8s.io/gengo/v2/types"
|
|
"k8s.io/klog/v2"
|
|
|
|
gennamer "knative.dev/pkg/codegen/cmd/injection-gen/namer"
|
|
)
|
|
|
|
// injectionTestGenerator produces a file of listers for a given GroupVersion and
|
|
// type.
|
|
type injectionGenerator struct {
|
|
generator.GoGenerator
|
|
outputPackage string
|
|
groupVersion clientgentypes.GroupVersion
|
|
groupGoName string
|
|
typeToGenerate *types.Type
|
|
imports namer.ImportTracker
|
|
typedInformerPackage string
|
|
groupInformerFactoryPackage string
|
|
disableInformerInit bool
|
|
}
|
|
|
|
var _ generator.Generator = (*injectionGenerator)(nil)
|
|
|
|
func (g *injectionGenerator) Filter(c *generator.Context, t *types.Type) bool {
|
|
// Only process the type for this informer generator.
|
|
return t == g.typeToGenerate
|
|
}
|
|
|
|
func (g *injectionGenerator) Namers(c *generator.Context) namer.NameSystems {
|
|
publicPluralNamer := &gennamer.ExceptionNamer{
|
|
Exceptions: map[string]string{
|
|
// these exceptions are used to deconflict the generated code
|
|
// you can put your fully qualified package like
|
|
// to generate a name that doesn't conflict with your group.
|
|
// "k8s.io/apis/events/v1beta1.Event": "EventResource"
|
|
},
|
|
KeyFunc: func(t *types.Type) string {
|
|
return t.Name.Package + "." + t.Name.Name
|
|
},
|
|
Delegate: namer.NewPublicPluralNamer(map[string]string{
|
|
"Endpoints": "Endpoints",
|
|
}),
|
|
}
|
|
|
|
return namer.NameSystems{
|
|
"raw": namer.NewRawNamer(g.outputPackage, g.imports),
|
|
"publicPlural": publicPluralNamer,
|
|
}
|
|
}
|
|
|
|
func (g *injectionGenerator) Imports(c *generator.Context) (imports []string) {
|
|
imports = append(imports, g.imports.ImportLines()...)
|
|
return
|
|
}
|
|
|
|
func (g *injectionGenerator) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
|
|
sw := generator.NewSnippetWriter(w, c, "{{", "}}")
|
|
|
|
klog.V(5).Info("processing type ", t)
|
|
|
|
m := map[string]interface{}{
|
|
"groupGoName": namer.IC(g.groupGoName),
|
|
"versionGoName": namer.IC(g.groupVersion.Version.String()),
|
|
"type": t,
|
|
"injectionRegisterInformer": c.Universe.Type(types.Name{Package: "knative.dev/pkg/injection", Name: "Default.RegisterInformer"}),
|
|
"controllerInformer": c.Universe.Type(types.Name{Package: "knative.dev/pkg/controller", Name: "Informer"}),
|
|
"informersTypedInformer": c.Universe.Type(types.Name{Package: g.typedInformerPackage, Name: t.Name.Name + "Informer"}),
|
|
"factoryGet": c.Universe.Type(types.Name{Package: g.groupInformerFactoryPackage, Name: "Get"}),
|
|
"loggingFromContext": c.Universe.Function(types.Name{
|
|
Package: "knative.dev/pkg/logging",
|
|
Name: "FromContext",
|
|
}),
|
|
"contextContext": c.Universe.Type(types.Name{
|
|
Package: "context",
|
|
Name: "Context",
|
|
}),
|
|
"contextWithValue": c.Universe.Function(types.Name{
|
|
Package: "context",
|
|
Name: "WithValue",
|
|
}),
|
|
"disableInformerInit": g.disableInformerInit,
|
|
}
|
|
|
|
sw.Do(injectionInformer, m)
|
|
|
|
return sw.Error()
|
|
}
|
|
|
|
var injectionInformer = `
|
|
{{ if not .disableInformerInit }}
|
|
func init() {
|
|
{{.injectionRegisterInformer|raw}}(withInformer)
|
|
}
|
|
{{ end }}
|
|
|
|
// Key is used for associating the Informer inside the context.Context.
|
|
type Key struct{}
|
|
|
|
{{ if .disableInformerInit }} func WithInformer {{ else }} func withInformer {{ end }} (ctx {{.contextContext|raw}}) ({{.contextContext|raw}}, {{.controllerInformer|raw}}) {
|
|
f := {{.factoryGet|raw}}(ctx)
|
|
inf := f.{{.groupGoName}}().{{.versionGoName}}().{{.type|publicPlural}}()
|
|
return {{ .contextWithValue|raw }}(ctx, Key{}, inf), inf.Informer()
|
|
}
|
|
|
|
// Get extracts the typed informer from the context.
|
|
func Get(ctx {{.contextContext|raw}}) {{.informersTypedInformer|raw}} {
|
|
untyped := ctx.Value(Key{})
|
|
if untyped == nil {
|
|
{{.loggingFromContext|raw}}(ctx).Panic(
|
|
"Unable to fetch {{.informersTypedInformer}} from context.")
|
|
}
|
|
return untyped.({{.informersTypedInformer|raw}})
|
|
}
|
|
`
|