Add generated informers

cmd/libs/go2idl/informer-gen/generators/groupinterface.go

@@ -0,0 +1,114 @@
+/*
+Copyright 2016 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 generators
+
+import (
+	"io"
+	"path/filepath"
+	"strings"
+
+	"k8s.io/gengo/generator"
+	"k8s.io/gengo/namer"
+	"k8s.io/gengo/types"
+	clientgentypes "k8s.io/kubernetes/cmd/libs/go2idl/client-gen/types"
+)
+
+// groupInterfaceGenerator generates the per-group interface file.
+type groupInterfaceGenerator struct {
+	generator.DefaultGen
+	outputPackage string
+	imports       namer.ImportTracker
+	groupVersions clientgentypes.GroupVersions
+	filtered      bool
+}
+
+var _ generator.Generator = &groupInterfaceGenerator{}
+
+func (g *groupInterfaceGenerator) Filter(c *generator.Context, t *types.Type) bool {
+	if !g.filtered {
+		g.filtered = true
+		return true
+	}
+	return false
+}
+
+func (g *groupInterfaceGenerator) Namers(c *generator.Context) namer.NameSystems {
+	return namer.NameSystems{
+		"raw": namer.NewRawNamer(g.outputPackage, g.imports),
+	}
+}
+
+func (g *groupInterfaceGenerator) Imports(c *generator.Context) (imports []string) {
+	imports = append(imports, g.imports.ImportLines()...)
+	return
+}
+
+type versionData struct {
+	Name      string
+	Interface *types.Type
+	New       *types.Type
+}
+
+func (g *groupInterfaceGenerator) GenerateType(c *generator.Context, t *types.Type, w io.Writer) error {
+	sw := generator.NewSnippetWriter(w, c, "$", "$")
+
+	versions := make([]versionData, 0, len(g.groupVersions.Versions))
+	for _, version := range g.groupVersions.Versions {
+		gv := clientgentypes.GroupVersion{Group: g.groupVersions.Group, Version: version}
+		versionPackage := filepath.Join(g.outputPackage, strings.ToLower(gv.Version.NonEmpty()))
+		iface := c.Universe.Type(types.Name{Package: versionPackage, Name: "Interface"})
+		versions = append(versions, versionData{
+			Name:      namer.IC(version.NonEmpty()),
+			Interface: iface,
+			New:       c.Universe.Function(types.Name{Package: versionPackage, Name: "New"}),
+		})
+	}
+	m := map[string]interface{}{
+		"interfacesSharedInformerFactory": c.Universe.Type(interfacesSharedInformerFactory),
+		"versions":                        versions,
+	}
+
+	sw.Do(groupTemplate, m)
+
+	return sw.Error()
+}
+
+var groupTemplate = `
+// Interface provides access to each of this group's versions.
+type Interface interface {
+	$range .versions -$
+		// $.Name$ provides access to shared informers for resources in $.Name$.
+		$.Name$() $.Interface|raw$
+	$end$
+}
+
+type group struct {
+	$.interfacesSharedInformerFactory|raw$
+}
+
+// New returns a new Interface.
+func New(f $.interfacesSharedInformerFactory|raw$) Interface {
+	return &group{f}
+}
+
+$range .versions$
+// $.Name$ returns a new $.Interface|raw$.
+func (g *group) $.Name$() $.Interface|raw$ {
+	return $.New|raw$(g.SharedInformerFactory)
+}
+$end$
+`