Rollup Automatic External Dependencies

Rollup Automatic External Dependencies.md

Hi!

This is an example of how to use [Rollup] with external dependencies, without hard-coding them.

It reads your installed NPM dependencies and treats them as external to Rollup. They still get bundled, but not as ES2015.

Make sure you have a .babelrc or a "babel":{} section in your package.json.

rollup.config.js

import path from 'path';
import fs from 'fs';
import babel from 'rollup-plugin-babel';
import npm from 'rollup-plugin-npm';
import commonjs from 'rollup-plugin-commonjs';

let pkg = JSON.parse(fs.readFileSync('./package.json')),
    external = Object.keys(pkg.dependencies || {}),
    babelRc = pkg.babel || JSON.parse(fs.readFileSync('./.babelrc'));

export default {
    entry: pkg['jsnext:main'] || 'src/index.js',
    dest: pkg.main,
    sourceMap: path.resolve(pkg.main),
    moduleName: pkg.amdName || pkg.name,
    format: process.env.FORMAT || 'umd',
    external,
    plugins: [
        babel({
            babelrc: false,
            ...babelRc
        }),
        npm({
            jsnext: true,
            main: true,
            skip: external
        }),
        commonjs({
            include: 'node_modules/**',
            exclude: '**/*.css'
        })
    ]
};

rollup-plugin-npm is now rollup-plugin-node-resolve.

You can let pkg = require('./package.json') 😎

Or import pkg from './package.json'

Now done with https://www.npmjs.com/package/rollup-plugin-auto-external