claro-8.x-1.x-dev/scripts/js/babel-es6-watch.js

scripts/js/babel-es6-watch.js
claro
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/**
 * @file
 *
 * Watch changes to *.es6.js files and compile them to ES5 during development.
 *
 * @internal This file is part of the core javascript build process and is only
 * meant to be used in that context.
 */
 
'use strict';
 
const fs = require('fs');
const path = require('path');
const chokidar = require('chokidar');
 
const changeOrAdded = require('./changeOrAdded');
const log = require('./log');
 
// Match only on .es6.js files.
const fileMatch = './**/*.es6.js';
// Ignore everything in node_modules
const watcher = chokidar.watch(fileMatch, {
  ignoreInitial: true,
  ignored: './node_modules/**'
});
 
const unlinkHandler = (err) => {
  if (err) {
    log(err);
  }
};
 
// Watch for filesystem changes.
watcher
  .on('add', changeOrAdded)
  .on('change', changeOrAdded)
  .on('unlink', (filePath) => {
    const fileName = filePath.slice(0, -7);
    fs.stat(`${fileName}.js`, () => {
      fs.unlink(`${fileName}.js`, unlinkHandler);
    });
  })
  .on('ready', () => log(`Watching '${fileMatch}' for changes.`));

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