rollup.config.js

// import cleanup from 'rollup-plugin-cleanup';
// import copy from 'rollup-plugin-cpy';
// https://github.com/mjeanroy/rollup-plugin-prettier
// https://gitlab.com/IvanSanchez/rollup-plugin-file-as-blob
// rollup-plugin-node-globals
// rollup-plugin-async
// rollup-plugin-nodent
import commonjs from 'rollup-plugin-commonjs';
import resolve from 'rollup-plugin-node-resolve';
import builtins from 'rollup-plugin-node-builtins';
import globals from 'rollup-plugin-node-globals';
import babel from 'rollup-plugin-babel';
// import json from 'rollup-plugin-json';
import pkg from './package.json';
// import eslint from "rollup-plugin-eslint"

// not all files you want to resolve are .js files
// Default: [ '.mjs', '.js', '.json', '.node' ]
const extensions = ['.js'];

const name = 'JSONFilesValidator';

// packages that should be treated as external dependencies, not bundled
// e.g. ['axios']
const external = [
  '@groceristar/sd-wrapper',
  'fs',
  'path',
  'lodash',
  'jest-json-schema',
  'shelljs',
  'jest'
];

// list of plugins used during building process
const plugins = () => [
  // Allows node_modules resolution
  resolve({
    extensions,

    // the fields to scan in a package.json to determine the entry point
    // if this list contains "browser", overrides specified in "pkg.browser"
    // will be used
    mainFields: ['module', 'main', 'browser'], // Default: ['module', 'main']
  }),

  // Allows verification of entry point and all imported files with ESLint.
  // @TODO fix and enable eslint for rollup
  // eslint({
  //   /* your options */
  //   fix:true,
  //   throwOnWarning:true,
  //   throwOnError:true

  // }),

  // Allow bundling cjs modules. Rollup doesn't understand cjs
  commonjs({
    ignore: ['conditional-runtime-dependency'],
  }),

  // use Babel to compile TypeScript/JavaScript files to ES5
  babel({
    extensions,
    include: ['src/*'],
    // ignore node_modules/ in transpilation process
    exclude: 'node_modules/**',
    // ignore .babelrc (if defined) and use options defined here
    // babelrc: false,
    // use recommended babel-preset-env without es modules enabled
    // and with possibility to set custom targets e.g. { node: '8' }
    // presets: [['env', { modules: false, targets }]],
    // solve a problem with spread operator transpilation https://github.com/rollup/rollup/issues/281
    // plugins: ['babel-plugin-transform-object-rest-spread'],
    // removes comments from output
    comments: false,
  }),

  globals(),
  builtins(),

  // remove flow annotations from output
  // flow(),

  // copy Flow definitions from source to destination directory
  // copy({
  //   files: ['src/*.flow'],
  //   dest: 'dist',
  // }),
  // Allow Rollup to import data from JSON file
  // json()
  // json({
  //   include: 'src/data/**',
  //
  //   // for tree-shaking, properties will be declared as
  //   // variables, using either `var` or `const`
  //   preferConst: true,
  //
  //   // generate a named export for every property of the JSON object
  //   namedExports: true // Default: true
  //
  // })
];

export default {
  // source file / entrypoint
  input: 'src/index.js',
  // output configuration
  output: [
    {
      // output file location
      file: pkg.main,
      // format of generated JS file, also: esm, and others are available
      format: 'cjs',
    },
    {
      // output file location
      file: pkg.module,
      // format of generated JS file, also: esm, and others are available
      format: 'es',
      // format: 'esm',
      // add sourcemaps
      sourcemap: true,
    },
    {
      // output file location
      file: pkg.browser,
      // format of generated JS file, also: esm, and others are available
      format: 'iife',
      // name visible for other scripts
      name,
      // https://rollupjs.org/guide/en#output-globals-g-globals
      // globals: {}
    },
  ],

  // Specify here external modules which you don't want to
  // include in your bundle (for instance: 'lodash', 'moment' etc.)
  // https://rollupjs.org/guide/en#external-e-external
  external,

  // build es modules or commonjs
  plugins: plugins(),
};