phpengine/build.js

const compressor = require('node-minify');
const sass = require('node-sass');
const {writeFileSync} = require('fs');
const {execSync} = require('child_process');

// The Libraries to join in minified files
const libList = [
  "node_modules/jquery/dist/jquery.min.js",
  "node_modules/bootstrap/dist/js/bootstrap.bundle.min.js"
];

// The css files to minify
const cssList = [
  "node_modules/bootstrap/dist/css/bootstrap.min.css",
  "ui/css/omlink.css"
];

// The javascript files to minify
const jsList = [
  "ui/js/omlink.js"
];

/**
 * MAIN
 */

let buffer = sass.renderSync({file: 'ui/css/omlink.scss'});

writeFileSync('ui/css/omlink.css', buffer.css);

compressor.minify({
    compressor: 'clean-css',
    input: cssList,
    output: 'bundle.css'
  }
);

compressor.minify({
    compressor: 'uglify-es',
    input: jsList,
    output: 'ui/js/omlink.min.js'
  }
);

compressor.minify({
    compressor: 'no-compress',
    input: [].concat(libList, ["ui/js/omlink.min.js"]),
    output: 'bundle.js'
  }
);