一、rollup

参考：
redux
reach-router
rollup-starter-lib
rollup-starter-app
roller-cli
create-react-library

一、安装
npm install --global rollup

二、命令：
rollup -c
默认指向rollup.config.js

import babel from 'rollup-plugin-babel';
import commonjs from 'rollup-plugin-commonjs';
import peerDepsExternal from 'rollup-plugin-peer-deps-external';
import postcss from 'rollup-plugin-postcss';
import resolve from 'rollup-plugin-node-resolve';
import image from 'rollup-plugin-image';
import sizes from 'rollup-plugin-sizes';
// import env from 'rollup-plugin-env';
// import uglify from 'rollup-plugin-uglify';

import pkg from './package.json';

const external = Object.keys(pkg.dependencies || {});

export default {
  input: 'src/index.js',
  output: [
    {
      file: pkg.main,
      format: 'cjs',
    },
    {
      file: pkg.module,
      format: 'es',
      sourcemap: true,
    },
  ],
  plugins: [
    // env({ NODE_ENV: 'production' }),
    peerDepsExternal(),
    postcss({
      modules: true,
    }),
    image(),
    babel({
      exclude: 'node_modules/**',

    }),
    resolve(),
    commonjs({
      include: 'node_modules/**',
      namedExports: {
        'node_modules/react/index.js': ['Component', 'PureComponent', 'Children', 'createElement'],
      },
    }),
    // uglify(),
    sizes({ details: true }),
  ],
  external,  // dependencies 内 不需要打包进去，运行时加载
};

三、
rollyup 默认将相对路径加载， 如果想加载node_module 需要用rollup-plugin-node-resolve.
Rollup will only resolve relative module IDs by default.
If you do want to include the module in your bundle, you need to tell Rollup how to find it. In most cases, this is a question of using rollup-plugin-node-resolve.

四
Since most packages in your node_modules folder are probably legacy CommonJS rather than JavaScript modules, you may need to use rollup-plugin-commonjs:

五、
rollup-plugin-babel
在Babel实际编译代码之前，需要进行配置。 创建一个新文件src/.babelrc：