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