rollup.config.js

/* eslint-disable @typescript-eslint/no-var-requires */
const typescript = require('rollup-plugin-typescript2')
const { uglify } = require('rollup-plugin-uglify')
const nodeResolve = require('@rollup/plugin-node-resolve')
const commonjs = require('@rollup/plugin-commonjs')

const makeConfig = ({
    packageName,
    declaration = false,
    umd = false,
    compress = false,
    file
}) => {
    const plugins = [
        nodeResolve({ mainFields: ['jsnext', 'module'] }),
        commonjs(),
        typescript({
            tsconfig: `./packages/${packageName}/tsconfig.build.json`,
            useTsconfigDeclarationDir: true,
            clean: true,
            tsconfigOverride: { compilerOptions: { declaration } }
        }),
        compress && uglify()
    ].filter(Boolean)

    return {
        input: `packages/${packageName}/modules/index.ts`,
        external: umd
            ? []
            : Object.keys(
                  require(`./packages/${packageName}/package.json`)
                      .dependencies || {}
              ).concat(
                  Object.keys(
                      require(`./packages/${packageName}/package.json`)
                          .peerDependencies || {}
                  )
              ),
        output: umd
            ? {
                  file,
                  name: packageName,
                  format: 'umd'
              }
            : [
                  {
                      format: 'es',
                      file: `packages/${packageName}/dist/index.es.js`
                  },
                  {
                      format: 'cjs',
                      file: `packages/${packageName}/dist/index.js`
                  }
              ],
        plugins
    }
}

const makePackageConfig = packageName =>
    makeConfig({
        packageName,
        declaration: true
    })

module.exports = [
    makePackageConfig('router5-transition-path'),
    makeConfig({
        packageName: 'router5',
        file: 'dist/router5.min.js',
        umd: true,
        compress: true
    }),
    makeConfig({
        packageName: 'router5',
        file: 'dist/router5.js',
        umd: true,
        format: 'umd'
    }),
    makePackageConfig('router5'),
    makePackageConfig('router5-helpers'),
    makePackageConfig('router5-plugin-browser'),
    makePackageConfig('router5-plugin-logger'),
    makePackageConfig('router5-plugin-listeners'),
    makePackageConfig('router5-plugin-persistent-params'),
    makePackageConfig('rxjs-router5'),
    makePackageConfig('xstream-router5'),
    makePackageConfig('react-router5'),
    makePackageConfig('redux-router5'),
    makePackageConfig('redux-router5-immutable')
].filter(Boolean)