linting fixes

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

registry/etcd/etcd.go

@@ -335,9 +335,7 @@ func (e *etcdRegistry) GetService(name string) ([]*registry.Service, error) {
 				serviceMap[s.Version] = s
 			}
 
-			for _, node := range sn.Nodes {
-				s.Nodes = append(s.Nodes, node)
-			}
+			s.Nodes = append(s.Nodes, sn.Nodes...)
 		}
 	}
 

registry/memory/memory_watcher.go

@@ -13,10 +13,8 @@ type memoryWatcher struct {
 
 func (m *memoryWatcher) Next() (*registry.Result, error) {
 	// not implement so we just block until exit
-	select {
-	case <-m.exit:
-		return nil, errors.New("watcher stopped")
-	}
+	<-m.exit
+	return nil, errors.New("watcher stopped")
 }
 
 func (m *memoryWatcher) Stop() {

registry/memory/util.go

@@ -44,9 +44,13 @@ func recordToService(r *record) *registry.Service {
 	endpoints := make([]*registry.Endpoint, len(r.Endpoints))
 	for i, e := range r.Endpoints {
 		request := new(registry.Value)
-		*request = *e.Request
+		if e.Request != nil {
+			*request = *e.Request
+		}
 		response := new(registry.Value)
-		*response = *e.Response
+		if e.Response != nil {
+			*response = *e.Response
+		}
 
 		metadata := make(map[string]string)
 		for k, v := range e.Metadata {