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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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