gulp-server-io/src/lib/watcher/index.js

A local static server, plus livereload and a socket.io debugger for your SPA development with gulp

/**
 * This file will only get call from the main setup process as a fork process
 * And communicate back via the subprocess.send
 */
const EventEmitter = require('events');
const { fork } = require('child_process');
const { join } = require('path');
const { logutil } = require('../utils/helper');
const chalk = require('chalk');
// Const stockWatcher = require('./stock-watcher');
const watcherFile = join(__dirname, 'fork.js');
class WatcherCls extends EventEmitter {}
const debug = require('debug')('gulp-webserver-io:watchers');

module.exports = function(config) {
  const evt = new WatcherCls();
  const props = fork(watcherFile);
  props.send({ type: 'start', config });
  debug('[Watcher][start]', config.filePaths);
  if (config.verbose) {
    logutil(chalk.yellow('[Watcher][start]', config.filePaths));
  }

  // Listen to the channel
  props.on('message', opt => {
    if (config.verbose) {
      logutil(chalk.yellow(`[Watcher][${opt.type}]`), opt);
    }

    evt.emit(opt.type, opt);
  });
  return evt;
};