rollup.config.js

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

const env = process.env.NODE_ENV;
const config = {
  input: 'src/index.js',
  plugins: []
};

if (env === 'es' || env === 'cjs') {
  config.output = { format: env, indent: false };
  config.external = ['symbol-observable'];
  config.plugins.push(babel({
    plugins: ['external-helpers'],
  }));
}

if (env === 'development' || env === 'production') {
  config.output = { format: 'umd', name: 'hpjs', indent: false };
  config.plugins.push(
    nodeResolve({
      jsnext: true
    }),
    babel({
      exclude: 'node_modules/**',
      plugins: ['external-helpers'],
    }),
    replace({
      'process.env.NODE_ENV': JSON.stringify(env)
    })
  );
}

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

export default config;