Include a basic working template using babel 7

[Brent McSharry]

I am trying to get the most incredibly basic example building. I have set up a repository at https://github.com/mcshaz/simple-rollup-babel-test

the most straight forward package.json I think I need is

  "devDependencies": {
    "@babel/core": "^7.7.7",
    "@babel/preset-env": "^7.7.7",
    "@rollup/plugin-commonjs": "^11.0.0",
    "@rollup/plugin-node-resolve": "^6.0.0",
    "core-js": "^3.6.0",
    "rollup": "^1.27.14",
    "rollup-plugin-babel": "^4.3.3"
  },

and likewise for the rollup.config.js

import babel from 'rollup-plugin-babel';
import 'core-js';
import resolve from '@rollup/plugin-node-resolve';
 import commonjs from '@rollup/plugin-commonjs';

export default {
  input: 'input.js',
  output: [{
      file: 'output-iife.dist.js',
      format: 'iife',
      name: 'test'
    }, {
      file: 'output-amd.dist.js',
      format: 'amd',
    }, {
      file: 'output-cjs.dist.js',
      format: 'cjs',
    },
  ],
  plugins: [
    babel({
      babelrc: false,
      include: `*.js`,
      exclude: `node_modules/**`,
      presets: [[ '@babel/preset-env',
        {
          modules: false,
          useBuiltIns: 'usage',
          targets: { ie: "8" },
          corejs: 3,
        }]],
    }),
    resolve(),
    commonjs()
  ],
};

but the simple example won't build:

> rollup -c

input.js → output-iife.dist.js, output-amd.dist.js, output-cjs.dist.js...
[!] Error: Unexpected token
node_modules/core-js/internals/parse-int.js (11:14)
 9: // `parseInt` method
10: // https://tc39.github.io/ecma262/#sec-parseint-string-radix
11: module.exports = FORCED ? function parseInt(string, radix) {
                  ^

can someone please help me get this building/transpiling and I will leave the repo as a starting point for people.

[Mateusz Burzyński]

This is a bug in @rollup/pluginutils used by @rollup/plugin-commonjs. I've prepared a fix for it here: rollup/plugins#116

[Mateusz Burzyński]

The fix has been merged to @rollup/pluginutils. It hasn't been released yet though - I recommend waiting for that release. Going to close this issue as it doesn't belong to this repository, hope you understand.