add timeout to vcsLister.List() (#1986)

pkg/download/list.go

@@ -28,7 +28,7 @@ func ListHandler(dp Protocol, lggr log.Entry, df *mode.DownloadFile) http.Handle
 
 		versions, err := dp.List(r.Context(), mod)
 		if err != nil {
-			severityLevel := errors.Expect(err, errors.KindNotFound)
+			severityLevel := errors.Expect(err, errors.KindNotFound, errors.KindGatewayTimeout)
 			err = errors.E(op, err, severityLevel)
 			lggr.SystemErr(err)
 			w.WriteHeader(errors.Kind(err))

pkg/download/protocol_test.go

@@ -50,7 +50,7 @@ func getDP(t *testing.T) Protocol {
 	return New(&Opts{
 		Storage:     s,
 		Stasher:     st,
-		Lister:      module.NewVCSLister(goBin, conf.GoBinaryEnvVars, fs),
+		Lister:      module.NewVCSLister(goBin, conf.GoBinaryEnvVars, fs, conf.TimeoutDuration()),
 		NetworkMode: Strict,
 	})
 }