codegen: skip generation of informers and listers on resources with missing verbs

staging/src/k8s.io/kube-gen/cmd/informer-gen/generators/packages.go

@@ -172,7 +172,7 @@ func Packages(context *generator.Context, arguments *args.GeneratorArgs) generat
 		var typesToGenerate []*types.Type
 		for _, t := range p.Types {
 			tags := util.MustParseClientGenTags(t.SecondClosestCommentLines)
-			if !tags.GenerateClient || tags.NoVerbs {
+			if !tags.GenerateClient || tags.NoVerbs || !tags.HasVerb("list") || !tags.HasVerb("watch") {
 				continue
 			}
 
@@ -304,7 +304,8 @@ func groupPackage(basePackage string, groupVersions clientgentypes.GroupVersions
 			return generators
 		},
 		FilterFunc: func(c *generator.Context, t *types.Type) bool {
-			return util.MustParseClientGenTags(t.SecondClosestCommentLines).GenerateClient
+			tags := util.MustParseClientGenTags(t.SecondClosestCommentLines)
+			return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
 		},
 	}
 }
@@ -344,7 +345,8 @@ func versionPackage(basePackage string, gv clientgentypes.GroupVersion, boilerpl
 			return generators
 		},
 		FilterFunc: func(c *generator.Context, t *types.Type) bool {
-			return util.MustParseClientGenTags(t.SecondClosestCommentLines).GenerateClient
+			tags := util.MustParseClientGenTags(t.SecondClosestCommentLines)
+			return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("watch")
 		},
 	}
 }

staging/src/k8s.io/kube-gen/cmd/lister-gen/generators/lister.go

@@ -117,11 +117,15 @@ func Packages(context *generator.Context, arguments *args.GeneratorArgs) generat
 
 		var typesToGenerate []*types.Type
 		for _, t := range p.Types {
-			if !util.MustParseClientGenTags(t.SecondClosestCommentLines).GenerateClient {
+			tags := util.MustParseClientGenTags(t.SecondClosestCommentLines)
+			if !tags.GenerateClient || !tags.HasVerb("list") || !tags.HasVerb("get") {
 				continue
 			}
 			typesToGenerate = append(typesToGenerate, t)
 		}
+		if len(typesToGenerate) == 0 {
+			continue
+		}
 		orderer := namer.Orderer{Namer: namer.NewPrivateNamer(0)}
 		typesToGenerate = orderer.OrderTypes(typesToGenerate)
 
@@ -155,7 +159,8 @@ func Packages(context *generator.Context, arguments *args.GeneratorArgs) generat
 				return generators
 			},
 			FilterFunc: func(c *generator.Context, t *types.Type) bool {
-				return util.MustParseClientGenTags(t.SecondClosestCommentLines).GenerateClient
+				tags := util.MustParseClientGenTags(t.SecondClosestCommentLines)
+				return tags.GenerateClient && tags.HasVerb("list") && tags.HasVerb("get")
 			},
 		})
 	}