gulp.task('js', function() {
gulp.src(['assets/js/**/*.js', '!assets/js/scripts.min.js'])
.pipe(sourcemaps.init())
.pipe(order(['assets/js/**/*.js', 'assets/js/main.js']))
.pipe(concat('scripts.min.js'))
.pipe(uglify())
.pipe(sourcemaps.write('.'))
.pipe(gulp.dest('assets/js/'))
});