rollup and babel cwd

build.js

'use strict';

const path        = require('path');
const rollup      = require('rollup');

const babel       = require('rollup-plugin-babel');
const nodeResolve = require('rollup-plugin-node-resolve');
const commonjs    = require('rollup-plugin-commonjs');
const builtins    = require('rollup-plugin-node-builtins');
const globals     = require('rollup-plugin-node-globals');

var cache;

console.log('Build started...');
let defaultRollupOptions = {
  entry:          path.join(process.cwd(), 'src/main.js'),
  cache:          cache,
  plugins: [
    globals(),
    builtins(),
    nodeResolve({
      jsnext:     true,
      main:       true,
    }),
    commonjs({
      include:    'node_modules/**'
    }),
    babel({
      exclude:    'node_modules/**',
      presets:    [ [ 'es2015', { modules: false } ] ],
      plugins:    [ 'external-helpers' ],
      babelrc:    false,
    }),
  ],
  external: [
    'aws-sdk',
  ],
};
rollup.rollup(defaultRollupOptions).then(bundle => {
  cache = bundle; // build doesn't watch so this isn't used
  bundle.write({
    format:       'cjs',
    sourceMap:    true,
    dest:         'dist/index.js',
  });
  console.log('Build complete.');
});

package.json

{
  "dependencies": {
    "rollup": "^0.41.4",
    "rollup-plugin-babel": "^2.7.1",
    "rollup-plugin-commonjs": "^7.0.0",
    "rollup-plugin-node-builtins": "^2.0.0",
    "rollup-plugin-node-globals": "^1.1.0",
    "rollup-plugin-node-resolve": "^2.0.0"
  }
}

src__main.js

export default function() {
	console.log('hello');
}