@burst/cli/rollup.config.js

import nodeResolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
import json from 'rollup-plugin-json';
import babel from 'rollup-plugin-babel';
import { writeFileSync } from 'fs';
import pkg from './package.json';

const includeDeps = ['shared'];

includeDeps.forEach(d => {
  delete pkg.dependencies[d];
});

if (process.env.REMOVE_DEPS) {
  writeFileSync(`${__dirname}/package.json`, JSON.stringify(pkg, null, 2));
}

function generateOptions(input, output) {
  return {
    input: [input],
    output: {
      file: output,
      format: 'cjs',
    },
    external: ['fs', 'path', ...Object.keys(pkg.dependencies)],
    plugins: [
      json(),
      babel({
        extensions: ['.ts', '.tsx'],
        presets: [
          ['@babel/typescript'],
          ['@babel/react'],
          [
            '@babel/env',
            {
              targets: { node: '8' },
              modules: false,
              useBuiltIns: 'usage',
              corejs: '3',
            },
          ],
        ],
        plugins: [
          '@babel/proposal-class-properties',
          '@babel/proposal-object-rest-spread',
        ],
      }),
      nodeResolve({
        preferBuiltins: true,
        extensions: ['.mjs', '.js', '.json', '.node', '.ts', '.tsx'],
      }),
      commonjs({
        include: /node_modules/,
        namedExports: {
          '../shared/node_modules/js-yaml/index.js': ['safeLoad'],
        },
      }),
    ],
  };
}

export default [
  generateOptions('src/index.ts', 'lib/index.js'),
  generateOptions('src/workers/ts.ts', 'lib/workers/ts.js'),
  generateOptions('src/workers/prettier.ts', 'lib/workers/prettier.js'),
  generateOptions('src/workers/eslint.ts', 'lib/workers/eslint.js'),
];