angular-cli/addon/ng2/tasks/serve-webpack.ts

import * as fs from 'fs';
import * as path from 'path';
import * as chalk from 'chalk';
import * as SilentError from 'silent-error';
import * as Task from 'ember-cli/lib/models/task';
import * as webpack from 'webpack';
import * as WebpackDevServer from 'webpack-dev-server';
import * as ProgressPlugin from 'webpack/lib/ProgressPlugin';
import { webpackDevServerOutputOptions } from '../models/';
import { NgCliWebpackConfig } from '../models/webpack-config';
import { ServeTaskOptions } from '../commands/serve';
import { CliConfig } from '../models/config';
import { oneLine } from 'common-tags';

module.exports = Task.extend({
  run: function(commandOptions: ServeTaskOptions) {
    const ui = this.ui;

    let webpackCompiler: any;

    let config = new NgCliWebpackConfig(
      this.project, commandOptions.target,
      commandOptions.environment
    ).config;

    // This allows for live reload of page when changes are made to repo.
    // https://webpack.github.io/docs/webpack-dev-server.html#inline-mode
    config.entry.main.unshift(
      `webpack-dev-server/client?http://${commandOptions.host}:${commandOptions.port}/`
    );
    webpackCompiler = webpack(config);

    webpackCompiler.apply(new ProgressPlugin({
      profile: true,
      colors: true
    }));

    let proxyConfig = {};
    if (commandOptions.proxyConfig) {
      const proxyPath = path.resolve(this.project.root, commandOptions.proxyConfig);
      if (fs.existsSync(proxyPath)) {
        proxyConfig = require(proxyPath);
      } else {
        const message = 'Proxy config file ' + proxyPath + ' does not exist.';
        return Promise.reject(new SilentError(message));
      }
    }

    const webpackDevServerConfiguration: IWebpackDevServerConfigurationOptions = {
      contentBase: path.resolve(
        this.project.root,
        `./${CliConfig.fromProject().config.apps[0].root}`
      ),
      historyApiFallback: true,
      stats: webpackDevServerOutputOptions,
      inline: true,
      proxy: proxyConfig
    };

    ui.writeLine(chalk.green(oneLine`
      **
      NG Live Development Server is running on
      http://${commandOptions.host}:${commandOptions.port}.
      **
    `));

    const server = new WebpackDevServer(webpackCompiler, webpackDevServerConfiguration);
    return new Promise((resolve, reject) => {
      server.listen(commandOptions.port, `${commandOptions.host}`, function(err, stats) {
        if (err) {
          console.error(err.stack || err);
          if (err.details) { console.error(err.details); }
          reject(err.details);
        }
      });
    });
  }
});