rollup.config.js

import commonjs from '@rollup/plugin-commonjs';
import json from '@rollup/plugin-json';
import nodeResolve from '@rollup/plugin-node-resolve';
import { readdirSync } from 'fs';
import path from 'path';
import executable from 'rollup-plugin-executable';

const getCommands = (dir) => {
  const result = [];
  const commands = readdirSync(dir, { withFileTypes: true });
  commands.forEach(item => {
    if (item.isDirectory()) {
      result.push(...getCommands(path.join(dir, item.name)));
    } else if (item.name.endsWith('ts')) {
      result.push(path.join(dir, item.name));
    }
  });
  return result;
}

const commands = getCommands('./src/commands');

export default [
  ...[ 'index.js', ...commands.map(item => item.replace('src/', '').replace('ts', 'js')) ].map(file => ({
    input: `./dist/src/${file}`,
    output: {
      file: `./lib/${file}`,
      format: 'es',
      sourcemap: 'inline'
    },
    external: [ /node_modules/ ],
    plugins: [
      json(),
      commonjs(),
      nodeResolve({
        preferBuiltins: true
      }),
      executable()
    ],
    onwarn(warning, rollupWarn) {
      // Remove some of the warnings noise:
      // - CIRCULAR_DEPENDENCY -> not sure if this is an issue
      // - THIS_IS_UNDEFINED -> result of using typescript polyfills
      // - EVAL -> sometimes people just use eval. Deal with it.
      if (warning.code !== 'CIRCULAR_DEPENDENCY' && warning.code !== 'THIS_IS_UNDEFINED' && warning.code !== 'EVAL') {
        rollupWarn(warning);
      }
    }
  }))
]