update gulp and gulpfile

tasks/webpack.js

@@ -0,0 +1,41 @@
+/* RainLoop Webmail (c) RainLoop Team | Licensed under AGPL 3 */
+const webpack = require('webpack');
+const gutil = require('gulp-util');
+
+const {config} = require('./config');
+
+const webpackCfgBuilder = require('../webpack.config.builder.js');
+
+const webpackError = (err) => {
+	if (err) {
+		gutil.log('[webpack]', '---');
+		gutil.log('[webpack]', err.error ? err.error.toString() : '');
+		gutil.log('[webpack]', err.message || '');
+		gutil.log('[webpack]', '---');
+	}
+};
+
+const webpackCallback = (done) => (err, stats) => {
+	if (err) {
+		if (config.watch) {
+			webpackError(err);
+		} else {
+			throw new gutil.PluginError('webpack', err);
+		}
+	} else if (stats && stats.compilation && stats.compilation.errors && stats.compilation.errors[0]) {
+		if (config.watch) {
+			stats.compilation.errors.forEach(webpackError);
+		} else {
+			throw new gutil.PluginError('webpack', stats.compilation.errors[0]);
+		}
+	}
+
+	done();
+};
+
+exports.webpack = (done) => {
+	webpack(
+		webpackCfgBuilder(config.paths.staticJS, !config.community, 'production'),
+		webpackCallback(done)
+	);
+};