Gulpfile using Duo to build scripts

gulpfile.js

/*jslint node: true, sloppy:true */

var gulp = require('gulp'),
    Duo = require('duo'),
    through = require('through2'),
    paths = {
        scripts: ['src/boot.js'],
        styles: ['src/*.css', 'src/**/*.css'],
        images: ['src/*.png', 'src/**/*.png']
    };

function duo() {
    return through.obj(function (file, enc, done) {
        var    build = new Duo(__dirname);
        build.development(true);
        build.installTo('vendor/');
        build.entry(file.path);
        build.run(function (err, src) {
            if (err) {
                return done(err);
            }
            file.contents = new Buffer(src, 'utf8');
            return done(null, file);
        });
    });
}

gulp.task('scripts', function () {
    gulp.src(paths.scripts)
        .pipe(duo())
        .pipe(gulp.dest('static/'));
});

gulp.task('default', ['scripts']);

usage:

gulp