Fix example generation (#3547)

so the code uses the clue logger

Author: raphael

codegen/service/example_svc.go

@@ -72,6 +72,7 @@ func exampleServiceFile(genpkg string, _ *expr.RootExpr, svc *expr.ServiceExpr,
 		{Path: "fmt"},
 		{Path: "strings"},
 		{Path: path.Join(genpkg, svcName), Name: data.PkgName},
+		{Path: "goa.design/clue/log"},
 		{Path: "goa.design/goa/v3/security"},
 	}
 	sections := []*codegen.SectionTemplate{

codegen/service/templates/endpoint.go.tpl

@@ -24,6 +24,6 @@ func (s *{{ .ServiceVarName }}srvc) {{ .VarName }}(ctx context.Context{{ if .Pay
 		{{- end }}
 	{{- end }}
 {{- end }}
-	s.logger.Print("{{ .ServiceVarName }}.{{ .Name }}")
+	log.Print(ctx, "{{ .ServiceVarName }}.{{ .Name }}")
 	return
 }

codegen/service/templates/service_init.go.tpl

@@ -1,4 +1,4 @@
 {{ printf "New%s returns the %s service implementation." .StructName .Name | comment }}
-func New{{ .StructName }}(logger *log.Logger) {{ .PkgName }}.Service {
-	return &{{ .VarName }}srvc{logger}
+func New{{ .StructName }}() {{ .PkgName }}.Service {
+	return &{{ .VarName }}srvc{}
 }

codegen/service/templates/service_struct.go.tpl

@@ -1,4 +1,2 @@
 {{ printf "%s service example implementation.\nThe example methods log the requests and return zero values." .Name | comment }}
-type {{ .VarName }}srvc struct {
-	logger *log.Logger
-}
+type {{ .VarName }}srvc struct {}

grpc/codegen/templates/server_grpc_end.go.tpl

@@ -12,7 +12,7 @@
 			if lis == nil {
 				errc <- fmt.Errorf("failed to listen on %q", u.Host)
 			}
-			logger.Printf("gRPC server listening on %q", u.Host)
+			log.Printf(ctx, "gRPC server listening on %q", u.Host)
 			errc <- srv.Serve(lis)
 		}()
 

grpc/codegen/testdata/server-no-server.golden

@@ -49,7 +49,7 @@ func handleGRPCServer(ctx context.Context, u *url.URL, serviceEndpoints *service
 			if lis == nil {
 				errc <- fmt.Errorf("failed to listen on %q", u.Host)
 			}
-			logger.Printf("gRPC server listening on %q", u.Host)
+			log.Printf(ctx, "gRPC server listening on %q", u.Host)
 			errc <- srv.Serve(lis)
 		}()
 

grpc/codegen/testdata/server-server-hosting-multiple-services.golden

@@ -52,7 +52,7 @@ func handleGRPCServer(ctx context.Context, u *url.URL, serviceEndpoints *service
 			if lis == nil {
 				errc <- fmt.Errorf("failed to listen on %q", u.Host)
 			}
-			logger.Printf("gRPC server listening on %q", u.Host)
+			log.Printf(ctx, "gRPC server listening on %q", u.Host)
 			errc <- srv.Serve(lis)
 		}()
 

grpc/codegen/testdata/server-server-hosting-service-subset.golden

@@ -49,7 +49,7 @@ func handleGRPCServer(ctx context.Context, u *url.URL, serviceEndpoints *service
 			if lis == nil {
 				errc <- fmt.Errorf("failed to listen on %q", u.Host)
 			}
-			logger.Printf("gRPC server listening on %q", u.Host)
+			log.Printf(ctx, "gRPC server listening on %q", u.Host)
 			errc <- srv.Serve(lis)
 		}()