tld_wms/packages/webpack/scripts/dev.js

const Webpack = require('webpack');
const WebpackDevServer = require('webpack-dev-server');
const webpackConfig = require('../config/webpack.config');
const chalk = require('chalk');
const {clearConsole, startedServerLogger, errorLogger, junglePort} = require('./utils');

const isInteractive = process.stdout.isTTY;

const {host, port: defaultPort} = webpackConfig.devServer;

function start(port) {
  const devServerOptions = {...webpackConfig.devServer, port};
  const compiler = Webpack(webpackConfig);
  const {host} = devServerOptions;
  const server = new WebpackDevServer(compiler, devServerOptions);
  console.log(chalk.hex('#065279')('Starting dev server...'));
  server.startCallback(function(err) {
    if (err)
      return errorLogger('Dev server start error');

    isInteractive && clearConsole();
    startedServerLogger(port, host);
  });
}

junglePort(host, defaultPort)
  .then(function(port) {
    if (!port) return;

    start(port);
  })
  .catch(function(err) {
    err && err.message && console.log(err.message);

    process.exit(1);
  });