de-side-effect app

app.js

+const debug = require('debug')('loafer:server');
+const http = require('http');
+const exec = require('child_process').exec;
+const express = require('express');
+const path = require('path');
+const favicon = require('serve-favicon');
+const logger = require('morgan');
+const cookieParser = require('cookie-parser');
+const bodyParser = require('body-parser');
+const routes = require('./routes/index');
+const app = express();
+
+/**
+ * Get port and normalize into a number, string, or false.
+ */
+
+function normalizedPort() {
+  const val = process.env.PORT || '3011';
+  const port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+  return false;
+}
+
+function configureApp(port) {
+  app.set('port', port);
+  app.set('views', path.join(__dirname, '/./views'));
+  app.set('view engine', 'pug');
+
+  // uncomment after placing your favicon in /public
+  //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
+  app.use(logger('dev'));
+  app.use(bodyParser.json());
+  app.use(bodyParser.urlencoded({ extended: false }));
+  app.use(cookieParser());
+  app.use(express.static(path.join(__dirname, '/./public')));
+  app.use('/', routes);
+
+  // catch 404 and forward to error handler
+  app.use(function(req, res, next) {
+    const err = new Error('Not Found');
+    err.status = 404;
+    next(err);
+  });
+
+  // development error handler
+  // will print stacktrace
+  if (app.get('env') === 'development') {
+    app.use(function(err, req, res, next) {
+      res.status(err.status || 500);
+      res.render('error', {
+        message: err.message,
+        error: err
+      });
+    });
+  }
+
+  // production error handler
+  // no stacktraces leaked to user
+  app.use(function(err, req, res, next) {
+    res.status(err.status || 500);
+    res.render('error', {
+      message: err.message,
+      error: {}
+    });
+  });
+
+  return app;
+}
+
+function httpListen(app) {
+  const server = http.createServer(app);
+  const port = app.get('port');
+  server.listen(port);
+  server.on('error', onError.bind(port));
+  server.on('listening', onListening.bind(port));
+}
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof this === 'string'
+    ? 'Pipe ' + this
+    : 'Port ' + this;
+
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+function onListening() {
+  exec('open http://localhost:' + this);
+}
+
+function init() {
+  httpListen(configureApp(normalizedPort()));
+}
+
+module.exports.init = init;

bin/loaf

 #!/usr/bin/env node
 
-/**
- * Module dependencies.
- */
+const app = require('../app');
 
-const debug = require('debug')('loafer:server');
-const http = require('http');
-const exec = require('child_process').exec;
-const express = require('express');
-const path = require('path');
-const favicon = require('serve-favicon');
-const logger = require('morgan');
-const cookieParser = require('cookie-parser');
-const bodyParser = require('body-parser');
-const routes = require('../routes/index');
-const app = express();
-
-/**
- * Get port and normalize into a number, string, or false.
- */
-
-function normalizedPort() {
-  const val = process.env.PORT || '3011';
-  const port = parseInt(val, 10);
-
-  if (isNaN(port)) {
-    // named pipe
-    return val;
-  }
-  if (port >= 0) {
-    // port number
-    return port;
-  }
-  return false;
-}
-
-function configureApp(port) {
-  app.set('port', port);
-  app.set('views', path.join(__dirname, '/../views'));
-  app.set('view engine', 'pug');
-
-  // uncomment after placing your favicon in /public
-  //app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
-  app.use(logger('dev'));
-  app.use(bodyParser.json());
-  app.use(bodyParser.urlencoded({ extended: false }));
-  app.use(cookieParser());
-  app.use(express.static(path.join(__dirname, '/../public')));
-  app.use('/', routes);
-
-  // catch 404 and forward to error handler
-  app.use(function(req, res, next) {
-    const err = new Error('Not Found');
-    err.status = 404;
-    next(err);
-  });
-
-  // development error handler
-  // will print stacktrace
-  if (app.get('env') === 'development') {
-    app.use(function(err, req, res, next) {
-      res.status(err.status || 500);
-      res.render('error', {
-        message: err.message,
-        error: err
-      });
-    });
-  }
-
-  // production error handler
-  // no stacktraces leaked to user
-  app.use(function(err, req, res, next) {
-    res.status(err.status || 500);
-    res.render('error', {
-      message: err.message,
-      error: {}
-    });
-  });
-
-  return app;
-}
-
-function httpListen(app) {
-  const server = http.createServer(app);
-  const port = app.get('port');
-  server.listen(port);
-  server.on('error', onError.bind(port));
-  server.on('listening', onListening.bind(port));
-}
-
-function onError(error) {
-  if (error.syscall !== 'listen') {
-    throw error;
-  }
-
-  var bind = typeof this === 'string'
-    ? 'Pipe ' + this
-    : 'Port ' + this;
-
-  switch (error.code) {
-    case 'EACCES':
-      console.error(bind + ' requires elevated privileges');
-      process.exit(1);
-      break;
-    case 'EADDRINUSE':
-      console.error(bind + ' is already in use');
-      process.exit(1);
-      break;
-    default:
-      throw error;
-  }
-}
-
-function onListening() {
-  exec('open http://localhost:' + this);
-}
-
-httpListen(configureApp(normalizedPort()));
+app.init();