with defer

manager.go

@@ -33,7 +33,14 @@ func NewManager() *Manager {
 type ComponentsAreReady struct {
 }
 
-func (m *Manager) RunNonBlocking(ctx context.Context) error {
+func (m *Manager) RunNonBlocking(ctx context.Context, readyChan chan ComponentsAreReady) error {
+	go func() error {
+		defer func(ctx context.Context) {
+			err := m.shutdown(ctx)
+			if err != nil {
+				panic(err)
+			}
+		}(ctx)
 		m.initLifetime()
 		err := m.init(ctx)
 		if err != nil {
@@ -45,15 +52,15 @@ func (m *Manager) RunNonBlocking(ctx context.Context) error {
 			return err
 		}
 
+		readyChan <- ComponentsAreReady{}
+
 		err = m.wait(ctx)
 		if err != nil {
 			return err
 		}
 
-	err = m.shutdown(ctx)
+		return nil
-	if err != nil {
+	}()
-		return err
-	}
 	return nil
 }