packing using gulp-sourcemaps

gulp.js

gulp.task('requirejsBuild', ['copyAndCompressRequirements'], function() {
  return gulp.src('app/js/main.js')
    .pipe(sourcemaps.init())
    .pipe(requirejsOptimize({
      mainConfigFile : 'app/js/main.js',
      baseUrl: 'app/bower_components',
      findNestedDependencies: true,
      name: '../js/main',
      optimize: 'uglify2',
      preserveLicenseComments : false,
      paths : {
        'jquery' : 'empty:',
        'store' : 'empty:',
        'stripe' : 'empty:',
        'cookie' : 'empty:',
        'underscore': 'empty:',
        'select2': 'empty:',
        'urijs': 'empty:',
        'typekit': 'empty:',
        'autobahn' : 'empty:',
        'numeral' : 'empty:'
      },
    }))
    .pipe(sourcemaps.write('./'))
    .pipe(gulp.dest('app/js/dist'));
});