text: require('./check-versions')();
  
  process.env.NODE_ENV = 'production';
  
  const ora = require('ora');
  const rm = require('rimraf');
  const path = require('path');
  const chalk = require('chalk');
  const webpack = require('webpack');
  const config = require('../config');
  const webpackConfig = require('./webpack.prod.conf');
  
  const spinner = ora('building for production...');
  spinner.start();
  
  rm(path.join(config.build.assetsRoot, config.build.assetsSubDirectory), (err) => {
    if (err) throw err;
    webpack(webpackConfig, (er, stats) => {
      spinner.stop();
      if (er) throw er;
      process.stdout.write(
        `${stats.toString({
          colors: true,
          modules: false,
          // If you are using ts-loader, setting this to true will make
          // TypeScript errors show up during build.
          children: false,
          chunks: false,
          chunkModules: false,
        })}\n\n`,
      );
  
      if (stats.hasErrors()) {
        console.log(chalk.red('  Build failed with errors.\n'));
        process.exit(1);
      }
  
      console.log(chalk.cyan('  Build complete.\n'));
      console.log(
        chalk.yellow(
          '  Tip: built files are meant to be served over an HTTP server.\n' +
            "  Opening index.html over file:// won't work.\n",
        ),
      );
    });
  });
  