Fix function timeout when using firebase

See: https://stackoverflow.com/a/39215697/6451879

Author: FinnWoelm

package-lock.json

@@ -10,8 +10,11 @@
     "react": "^17.0.1",
     "react-dom": "^17.0.1"
   },
-  "devDependencies": {},
+  "devDependencies": {
+    "patch-package": "^6.2.2"
+  },
   "scripts": {
+    "postinstall": "patch-package",
     "dev": "next",
     "build": "next build",
     "postbuild": "next-on-netlify",

package.json

@@ -9,7 +9,19 @@ const TestPage = (props) => (
   </>
 );
 
-export async function getServerSideProps() {
+export async function getServerSideProps(context) {
+  // Get function context
+  const functionContext = context?.req?.functionContext;
+
+  // If we are currently in a Netlify function (deployed on netlify.app or
+  // locally with netlify dev), do not wait for empty event loop.
+  // See: https://stackoverflow.com/a/39215697/6451879
+  // Skip during next dev.
+  if (functionContext) {
+    console.log("Setting callbackWaitsForEmptyEventLoop: false");
+    functionContext.callbackWaitsForEmptyEventLoop = false;
+  }
+
   // Configuration for firebase
   const firebaseConfig = {
     apiKey: "AIzaSyBre20U7moSMgS5pCKSJsde2AIcssegRys",

pages/test.js

@@ -0,0 +1,17 @@
+diff --git a/node_modules/next-aws-lambda/index.js b/node_modules/next-aws-lambda/index.js
+index f8daeb9..9085de7 100644
+--- a/node_modules/next-aws-lambda/index.js
++++ b/node_modules/next-aws-lambda/index.js
+@@ -1,7 +1,11 @@
+ const reqResMapper = require("./lib/compatLayer");
+ 
+-const handlerFactory = page => (event, _context, callback) => {
++const handlerFactory = page => (event, context, callback) => {
+   const { req, res, responsePromise } = reqResMapper(event, callback);
++
++  // Make Netlify Function context available on request object
++  req.functionContext = context
++
+   if (page.render instanceof Function) {
+     // Is a React component
+     page.render(req, res);