mirror of https://github.com/knative/pkg.git
110 lines
2.9 KiB
Go
110 lines
2.9 KiB
Go
/*
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Copyright 2019 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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"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/klog"
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)
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// fakeClientGenerator produces a file of listers for a given GroupVersion and
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// type.
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type fakeClientGenerator struct {
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generator.DefaultGen
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outputPackage string
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imports namer.ImportTracker
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filtered bool
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fakeClientPkg string
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clientInjectionPkg string
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}
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var _ generator.Generator = (*fakeClientGenerator)(nil)
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func (g *fakeClientGenerator) Filter(c *generator.Context, t *types.Type) bool {
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// We generate a single client, so return true once.
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if !g.filtered {
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g.filtered = true
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return true
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}
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return false
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}
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func (g *fakeClientGenerator) 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 *fakeClientGenerator) Imports(c *generator.Context) (imports []string) {
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imports = append(imports, g.imports.ImportLines()...)
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return
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}
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func (g *fakeClientGenerator) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
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sw := generator.NewSnippetWriter(w, c, "{{", "}}")
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klog.V(5).Infof("processing type %v", t)
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m := map[string]interface{}{
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"clientKey": c.Universe.Type(types.Name{Package: g.clientInjectionPkg, Name: "Key"}),
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"fakeClient": c.Universe.Type(types.Name{Package: g.fakeClientPkg, Name: "Clientset"}),
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"injectionRegisterClient": c.Universe.Function(types.Name{
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Package: "knative.dev/pkg/injection",
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Name: "Fake.RegisterClient",
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}),
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"loggingFromContext": c.Universe.Function(types.Name{
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Package: "knative.dev/pkg/logging",
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Name: "FromContext",
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}),
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}
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sw.Do(injectionFakeClient, m)
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return sw.Error()
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}
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var injectionFakeClient = `
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func init() {
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{{.injectionRegisterClient|raw}}(withClient)
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}
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func withClient(ctx context.Context, cfg *rest.Config) context.Context {
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ctx, _ = With(ctx)
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return ctx
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}
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func With(ctx context.Context, objects ...runtime.Object) (context.Context, *{{.fakeClient|raw}}) {
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cs := fake.NewSimpleClientset(objects...)
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return context.WithValue(ctx, {{.clientKey|raw}}{}, cs), cs
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}
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// Get extracts the Kubernetes client from the context.
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func Get(ctx context.Context) *{{.fakeClient|raw}} {
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untyped := ctx.Value({{.clientKey|raw}}{})
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if untyped == nil {
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{{.loggingFromContext|raw}}(ctx).Fatalf(
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"Unable to fetch %T from context.", (*{{.fakeClient|raw}})(nil))
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}
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return untyped.(*fake.Clientset)
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}
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`
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