gobblefile.js

const gobble = require('gobble')
const nodeResolve = require('rollup-plugin-node-resolve')
const commonjs = require('rollup-plugin-commonjs')
const replace = require('rollup-plugin-replace')
const babel = require('rollup-plugin-babel')
const uglify = require('rollup-plugin-uglify')
const autoprefixer = require('autoprefixer')
const cssnano = require('cssnano')
const pkg = require('./package')
const purifycss = require('purify-css')
const bundleSize = require('rollup-plugin-bundle-size')

function purify (code, options) { return purifycss(options.content, code, options) }
purify.defaults = { accept: '.css' }

const css = gobble('src/client/styles')
  .transform('sass', {
    src: 'entry.scss',
    dest: `assets/public/bundle-${pkg.version}.css`
  })
  .transform('postcss', { plugins: [autoprefixer()], map: { inline: false } })
  .transform(purify, { content: ['src/client/components/*.js'], info: true, rejected: true })
  .transform('postcss', { plugins: [cssnano()], map: { inline: false } })
  // add transform for sourceMapUrl to accomodate app basePath

const js = gobble('src/client').transform('rollup', {
  sourceMap: true,
  plugins: [
    nodeResolve({ jsnext: true }),
    commonjs({ include: 'node_modules/**', namedExports: { 'preact-redux': ['connect', 'Provider'] } }),
    replace({ 'process.env.NODE_ENV': JSON.stringify('production') }),
    babel({ babelrc: false, 'presets': ['es2015-minimal-rollup'], 'plugins': [['transform-react-jsx', { 'pragma': 'h' }]] }),
    uglify(),
    bundleSize()
  ],
  format: 'iife',
  entry: 'entry.js',
  dest: `assets/public/bundle-${pkg.version}.js`
})

const polyfills = gobble('src/client/utils').include('polyfills.js').moveTo('assets/public')

module.exports = gobble([css, js, polyfills])