Reduced test-case showing the problem with sharing routes between Router instances

home.ejs

<p>This is the homepage.</p>
<a href="<% url('home') %>">A link to myself</a>

<!--
This will throw an error: "No route found with the name:home"
-->

index.js

// the app's main point of entry

const express = require('express');
const app = express();
const namedRouter = new (require('named-routes'));
namedRouter.extendExpress(app);
namedRouter.registerAppHelpers(app);

app.use('/', require('./routes'));
app.set('views', './views');
app.set('view engine', 'ejs');


app.listen(8000, _ => {
  console.log('Example app listening on port 8000!');
});

routes.js

// routes.js contains route configuration
// other routes files can be included from here to keep files a bit cleaner
//
// note that I cannot access my app instance from here

const router = require('express').Router();
const namedRouter = new (require('named-routes'));
namedRouter.extendExpress(router);

router.get('/', 'home', (req, res) => res.render('home'));
module.exports = router;