app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var stylus = require('stylus');
var exphbs = require('express-handlebars');

var indexRouter = require('./routes/index');
var compsRouter = require('./routes/components');
var neuRouter = require('./routes/neu');

var app = express();

// view engine setup

var hbs = exphbs.create({
    extname: 'hbs',
    defaultLayout: 'layout',
    layoutsDir: __dirname + '/views/layouts',
    helpers: {
        section: function(name, options) {
            if (!this._sections) this._sections = {};
            this._sections[name] = options.fn(this);
            return null;
        }
    }
});
app.engine('hbs', hbs.engine);
//app.engine('hbs', hbs({extname: 'hbs', defaultLayout: 'layout', layoutsDir: __dirname + '/views/layouts'}));
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(stylus.middleware(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/components', compsRouter);
app.use('/neu', neuRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;