node js minify and concatenate to single file from modular code structure

Question

I have a modularised application based on NodeJS. The structure of the application looks like

• server.js
• controllers
  • controller1.js
  • controller2.js
• dao
  • dao1.js
  • dao2.js
• node_modules

Now I want to minify and concatenate the entire project into a single file. The challenge I am facing is every controller and dao files are using " require " (relative paths) to include the node modules
Is there any easy way to achieve this?

Edit

Tried webpack module
My webpack.config.js looks like

var webpack = require('webpack');
var path = require('path');
var fs = require('fs');

var nodeModules = {};
fs.readdirSync(path.resolve(__dirname, 'node_modules'))
.filter(x => ['.bin'].indexOf(x) === -1)
.forEach(mod => { nodeModules[mod] = `commonjs ${mod}`; });

module.exports = {
  name: 'server',
  target: 'node',
  entry: './server.js',
  output: {
    path: path.join(__dirname, 'build'),
    filename: 'bundle.js'
  },
  externals: nodeModules,
  module: {
    loader: [
      {
        test: /\.json$/, loader: 'json-loader'
      }
    ]
  }
}

It is giving this error:

ERROR in ./~/npm/~/npm-registry-client/test/unpublish-scoped.js Module not found: Error: Cannot resolve 'file' or 'directory' ./fixtures/@npm/np m-registry-client/cache.json in D:\\OTTAFW\\node_modules\\npm\\node_modules\\npm-regi stry-client\\test

Answer 1

Did you take a look at webpack? https://webpack.js.org/concepts/

Answer 2

You can use a task runner like gulp to stitch and minify. See here if you want to bluntly stitch and minify files. In order to manage dependency you have to define a dependency tree and write the logic so that multiple dependencies are not added in the final build.

server.js
controllers
|-- controller1.js
          require('lodash')
|-- controller2.js
          require('./controller1')
dao
|-- dao1.js
          require('lodash')
          require('../controllers/controller2')
|-- dao2.js
          require('../controllers/controller1')
node_modules

Hypothetically, if this is the case you have to careful of the fact that the files gets attached only once.

On the contrary, you can use rollup