es6

# -*- mode: snippet -*-
# name: ES6+Babel compilation task
# --
const util       = require("gulp-util"),
      uglify     = require("gulp-uglify"),
      browserify = require("browserify"),
      source     = require("vinyl-source-stream"),
      buffer     = require("vinyl-buffer");

gulp.task("js", () => {
    return browserify({
            entries: dir.source + "main.js",
            debug: !util.env.pack,
            detectGlobals: false,
            paths: [dir.source]
        })
        .transform("babelify", {presets: ["es2015"], ignore: util.env.pack ? null : /.*/})
        .bundle()
        .pipe(source("main.js"))
        .pipe(buffer())
        .pipe(util.env.pack ? uglify({mangle: {keep_fnames: true}}) : util.noop())
        .pipe(gulp.dest(dir.build));
});