From bb849efd3ae98320bb363f4eccf294921dee95c4 Mon Sep 17 00:00:00 2001
From: Owen Stowe <ostowe@gmail.com>
Date: Wed, 27 May 2020 20:21:22 -0400
Subject: [PATCH] fix(server): use reduce on exportServer instead of forEach

---
 packages/core/server/index.js | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/packages/core/server/index.js b/packages/core/server/index.js
index 954ad8eeb5..307e4e1d5c 100644
--- a/packages/core/server/index.js
+++ b/packages/core/server/index.js
@@ -72,6 +72,15 @@ app.use((err, req, res, next) => {
 
 // Run all export server functions.
 const serverExportMiddleware = getConfigField('exportServer');
-serverExportMiddleware.forEach((middleware) => middleware(app));
-
-module.exports = app;
+module.exports = serverExportMiddleware.reduce(
+  (acc, middleware) => {
+    const exportApp = middleware(app);
+
+    if (exportApp) {
+      return exportApp;
+    }
+
+    return acc;
+  },
+  app
+);