Rollup Test

gulpfile.js

var gulp = require('gulp');
var runSequence = require('run-sequence');
var plugins = require('gulp-load-plugins')({
  pattern: [
    'gulp-*',
    'gulp.*',
    'rollup-plugin-npm',
    'rollup-plugin-commonjs',
    'rollup-plugin-babel'
  ]
});

gulp.task('default', function(callback) {
  runSequence('build', 'watch', callback);
});

gulp.task('watch', function() {
  gulp.watch('src/**/*.js', ['js']);
});

gulp.task('build', ['js'])

gulp.task('js', function(callback) {
  runSequence('js:rollup', callback);
});

gulp.task('js:rollup', function() {
  return gulp.src('src/app.js', {read: false})
    .pipe(plugins.plumber())
    .pipe(plugins.rollup({
      sourceMap: true,
      moduleName: 'app',
      format: 'iife',
      plugins: [
        plugins.rollupPluginNpm({
          jsnext: true,
          main: true
        }),
        plugins.rollupPluginCommonjs({
          include: 'node_modules/**',
          exclude: []
        }),
        plugins.rollupPluginBabel({
          sourceMap: true,
          compact: false,
          comments: false,
          presets: ['es2015-rollup']
        })
      ]
    }))
    .pipe(plugins.sourcemaps.write('.', {sourceRoot: '../'}))
    .pipe(gulp.dest('build'));
});

gulp.task('js:uglify', function() {
  return gulp.src('test/app.js')
    .pipe(plugins.plumber())
    .pipe(plugins.sourcemaps.init({loadMaps: true}))
    .pipe(plugins.uglify({}))
    .pipe(plugins.rename('app.min.js'))
    //.pipe(plugins.sourcemaps.write('.')) // enable/disable sourcemaps
    .pipe(gulp.dest('build'));
})

package.json

{
  "private": true,
  "name": "rollup-test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-preset-es2015-rollup": "^1.0.0",
    "gulp": "^3.9.0",
    "gulp-if": "^2.0.0",
    "gulp-load-plugins": "^1.1.0",
    "gulp-plumber": "^1.0.1",
    "gulp-rename": "^1.2.2",
    "gulp-rollup": "^1.4.0",
    "gulp-sourcemaps": "^1.6.0",
    "gulp-uglify": "^1.5.1",
    "rollup-plugin-babel": "^2.2.0",
    "rollup-plugin-commonjs": "^1.4.0",
    "rollup-plugin-npm": "^1.1.0",
    "run-sequence": "^1.1.5"
  },
  "dependencies": {
    "jquery": "^1.11.3"
  }
}