es2049package/config/rollup.config.mjs

ECMAScript 2049 package: zero-configuration libraries and command-line utilies by Harald Rudell

/*
© 2017-present Harald Rudell <harald.rudell@gmail.com> (http://www.haraldrudell.com)
This source code is licensed under the ISC-style license found in the LICENSE file in the root directory of this source tree.
*/
import pjson from '../package.json'
import nodeIgnores from '../src/nodepackages.js'
import babelPrintFilename from '../src/babelPrintFilenamePlugin.js'
import {convertYaml} from './convertYaml.js'

import babel from 'rollup-plugin-babel'
import commonjs from 'rollup-plugin-commonjs'
import _eslint from 'rollup-plugin-eslint'; const {eslint} = _eslint
import json from 'rollup-plugin-json'
import resolve from 'rollup-plugin-node-resolve'
import {shebang as shebangPlugin, chmod} from 'rollup-plugin-thatworks'

import path from 'path'
import util from 'util'

const srcRollupConfig = 'src/rollup.config.mjs'

const print = !!process.env.DEBUG

convertYaml(path.resolve('src', 'eslintrc.yaml'), path.resolve('src', 'eslintrc.json'))

export default [
  {input: srcRollupConfig, output: {file: pjson.main, format: 'es'}, options: {dependencies: true}},
  {input: 'src/cleanbin.js', output: {file: 'bin/clean.js', format: 'es'}, options: {shebang: true}},
  {input: 'src/rollup.js', output: {file: 'bin/rollup.js', format: 'es'}, options: {shebang: true}},
].map(getConfig)

function getConfig(config0) {
  const {options: {shebang, dependencies}, input, output}  = config0
  const includeExclude = {
    include: ['**/*.js', '**/*.mjs'],
    exclude: 'node_modules/**',
  }
  let babelOptions

  const config = {
    input, output,
    external: nodeIgnores.slice().concat(Object.keys(Object(Object(pjson).dependencies))),
    plugins:  [
      eslint(includeExclude),
      resolve({extensions: ['.mjs', '.js', '.json'], jail: process.cwd()}),
      json(), // required for import of .json files
      babel(babelOptions = Object.assign({
        babelrc: false, // unlike babel-node, rollup fails if an es2015 module transformer is included
        //runtimeHelpers: true,
        presets: [['@babel/preset-env', {targets: {node: '12'}, modules: false}]],
        plugins: [
          ].concat(print ? babelPrintFilename : []),
      }, includeExclude)),
      commonjs(),
    ].concat(shebang ? [shebangPlugin(), chmod()] : []),
  }

  if (print) {
    console.log(`Rollup options for ${config.input}: ${util.inspect(config, {colors: true, depth: null})}`)
    console.log('Rollup-Babel options:', util.inspect(babelOptions, {colors: true, depth: null}))
  }

  return config
}