ng2-gulpfile.js

var systemjsBuilder = require('gulp-systemjs-builder');
var gulp = require('gulp');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');

var includedJsFiles = [
    "node_modules/core-js/client/shim.min.js",
    "node_modules/zone.js/dist/zone.js",
    "node_modules/reflect-metadata/Reflect.js",
    "node_modules/systemjs/dist/system.src.js",
    "dist/main.js"
];

var binDirectoriesAndFiles = [
    "fonts/**/*",
    "styles/**/*",
    "views/**/*",
    "favicon.ico",
    "index.html",
    "all.the.js"
];


gulp.task('build-sysjs', function() {
    var builder = systemjsBuilder();
    builder.loadConfigSync('./scripts/systemjs.config.js');

    return builder.buildStatic('dist/main.js', 'dist/main.2.js', {
        minify: true,
        mangle: false
    })
        .pipe(gulp.dest('.'));
});


gulp.task('concat-uglify', ['build-sysjs'], function() {
    return gulp.src(includedJsFiles)
        .pipe(concat('all.the.js'))
        .pipe(uglify())
        .pipe(gulp.dest('.'));
});


gulp.task('copy-to-bin', ['concat-uglify'], function() {
    return gulp.src(binDirectoriesAndFiles, {base: '.'})
        .pipe(gulp.dest('drop'));
});


gulp.task('prod', ['build-sysjs', 'concat-uglify', 'copy-to-bin']);