import path from 'path';
import babel from 'rollup-plugin-babel';
import commonjs from 'rollup-plugin-commonjs';
import filesize from 'rollup-plugin-filesize';
import resolve from 'rollup-plugin-node-resolve';

import pkg from './package.json';

const root = process.platform === 'win32' ? path.resolve('/') : '/';

export default {
  input: './src/index.js',
  output: [
    {
      file: pkg.main,
      format: 'cjs',
      sourcemap: true
    },
    {
      file: pkg.module,
      format: 'es',
      sourcemap: true
    }
  ],
  external: id => !id.startsWith('.') && !id.startsWith(root),
  plugins: [
    babel({
      exclude: 'node_modules/**',
      runtimeHelpers: true
    }),
    resolve(),
    commonjs({
      include: 'node_modules/**'
    }),
    filesize()
  ]
};