Chris@0: const chalk = require('chalk');
Chris@0: const log = require('./log');
Chris@0: const babel = require('babel-core');
Chris@0: 
Chris@0: module.exports = (filePath, callback) => {
Chris@0:   // Transform the file.
Chris@0:   // Check process.env.NODE_ENV to see if we should create sourcemaps.
Chris@0:   babel.transformFile(
Chris@0:     filePath,
Chris@0:     {
Chris@0:       sourceMaps: process.env.NODE_ENV === 'development' ? 'inline' : false,
Chris@0:       comments: false,
Chris@0:       plugins: [
Chris@0:         ['add-header-comment', {
Chris@0:           'header': [
Chris@0:             `DO NOT EDIT THIS FILE.\nSee the following change record for more information,\nhttps://www.drupal.org/node/2815083\n@preserve`
Chris@0:           ]
Chris@0:         }]
Chris@0:       ]
Chris@0:     },
Chris@0:     (err, result) => {
Chris@0:       if (err) {
Chris@0:         log(chalk.red(err));
Chris@0:         process.exitCode = 1;
Chris@0:       }
Chris@0:       else {
Chris@0:         callback(result.code);
Chris@0:       }
Chris@0:     }
Chris@0:   );
Chris@0: };