rollup.config.js

import nodeResolve from 'rollup-plugin-node-resolve';
import babel from 'rollup-plugin-babel';
import replace from 'rollup-plugin-replace';
import commonjs from 'rollup-plugin-commonjs';
import uglify from 'rollup-plugin-uglify';

const env = process.env.NODE_ENV;

const config = {
  input: 'src/index.js',
  output: {
    format: 'umd',
    name: 'StokeToolbelt',
    globals: {
      lodash: 'lodash',
      'prop-types': 'PropTypes',
      react: 'React',
      'react-router-dom': 'ReactRouterDOM'
    }
  },
  external: ['lodash', 'prop-types', 'react', 'react-ga', 'react-router-dom'],
  plugins: [
    nodeResolve(),
    babel({
      exclude: '**/node_modules/**'
    }),
    replace({
      'process.env.NODE_ENV': JSON.stringify(env)
    }),
    commonjs()
  ]
};

if (env === 'production') {
  config.plugins.push(
    uglify({
      compress: {
        pure_getters: true,
        unsafe: true,
        unsafe_comps: true,
        warnings: false
      }
    })
  );
}

export default config;