es2049scripts/configrollup/rollup.config.mjs

ECMAScript 2049: ES.Next on every line by triple-transpile by Harald Rudell: ERASE THE PAST

/*
© 2017-present Harald Rudell <harald.rudell@gmail.com> (http://www.haraldrudell.com)
All rights reserved.
*/
import pjson from '../package.json'
import nodeIgnores from './nodepackages.js'
import babel85 from './babel85es.js'

import babel from 'rollup-plugin-babel'
import { eslint } from 'rollup-plugin-eslint'
import json from 'rollup-plugin-json'
import resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
import { shebang } from 'rollup-plugin-thatworks'

import path from 'path'
import fs from 'fs'

for (let p of ['name']) {
  const v = Object(pjson)[p]
  const tv = typeof v
  if (!v || tv !== 'string') throw new Error(`package.json field ${p} not non-empty string: ${tv}`)
}

const src = 'src'
const bin = 'bin'
const indexMjs = 'index.mjs'
const paths = {
  srcIndexMjs: path.join(src, indexMjs),
  binary: path.resolve(bin, pjson.name),
}
const includeExclude = {include: ['**/*.js', '**/*.mjs'], exclude: 'node_modules/**'}
const depExternals = Object.keys(Object(Object(pjson).dependencies))

export default {
  input: paths.srcIndexMjs,
  output: {file: paths.binary, format: 'cjs'},
  external: nodeIgnores.concat(depExternals),
  plugins:  [
    resolve({extensions: ['.js', '.mjs', '.json'], jail: process.cwd()}),
    eslint(includeExclude),
    json(),
    babel({/*runtimeHelpers: true, */ ...babel85, ...includeExclude}),
    commonjs(),
    shebang(),
    function chmodPlugin(mode) {
      return {
        name: 'chmodPlugin',
        generateBundle(bundle, data) { // rollup 1.x (0.x is onwrite)
          let filename = bundle && (bundle.file || bundle.dest)
          if (!filename) throw new Error('chmodPlugin.onwrite: filename missing')
          fs.chmodSync(filename, mode >= 0 ? Number(mode) : 0o755) // rwxr-xr-x
        },
      }
    }(),
  ],
}