rollup.config.js

import { emitModulePackageFile } from '../../shared/rollup.config';

import pkg from './package.json';

export default {
  input: 'src/index.js',
  plugins: [
    {
      name: 'external-package-json',
      resolveId(source) {
        if (source.endsWith('package.json')) {
          return { id: '../../package.json', external: true };
        }
        return null;
      }
    }
  ],
  external: [...Object.keys(pkg.dependencies), 'fs', 'path', 'os', 'util', 'url'],
  onwarn: (warning) => {
    throw Object.assign(new Error(), warning);
  },
  output: [
    { file: pkg.main, format: 'cjs', exports: 'named' },
    { file: pkg.module, format: 'es', plugins: [emitModulePackageFile()] }
  ]
};