rollup.config.mjs

import { createRequire } from 'node:module'
import { fileURLToPath } from 'node:url'
import path from 'node:path'
import json from '@rollup/plugin-json'
import terser from '@rollup/plugin-terser'

const require = createRequire(import.meta.url)
const __dirname = fileURLToPath(new URL('.', import.meta.url))
const packagesDir = path.resolve(__dirname, 'apps')
const packageDir = path.resolve(packagesDir, process.env.TARGET)

const resolve = p => path.resolve(packageDir, p)
const pkg = require(resolve(`package.json`))
const packageOptions = pkg.buildOptions || {}
const name = packageOptions.filename || path.basename(packageDir)

// 定义输出类型对应的编译项
const outputConfigs = {
  'esm-bundler': {
    file: resolve(`dist/${name}.esm-bundler.js`),
    format: `es`,
  },
  'esm-browser': {
    file: resolve(`dist/${name}.esm-browser.js`),
    format: `es`,
  },
  'cjs': {
    file: resolve(`dist/${name}.cjs.js`),
    format: `cjs`,
  },
  'global': {
    name,
    file: resolve(`dist/${name}.global.js`),
    format: `iife`,
  },
}

const packageFormats = ['esm-bundler', 'cjs']
const packageConfigs = packageFormats.map(format => createConfig(format, outputConfigs[format]))

export default packageConfigs

function createConfig(format, output, plugins = []) {
  // 是否输出声明文件
  const shouldEmitDeclarations = !!pkg.types

  const minifyPlugin = format === 'global' && format === 'esm-browser' ? [terser()] : []
  return {
    input: resolve('src/index.ts'),
    // Global and Browser ESM builds inlines everything so that they can be
    // used alone.
    external: [
      ...['path', 'fs', 'os', 'http'],
      ...Object.keys(pkg.dependencies || {}),
      ...Object.keys(pkg.peerDependencies || {}),
      ...Object.keys(pkg.devDependencies || {}),
    ],
    plugins: [
      json({
        namedExports: false,
      }),
      ...minifyPlugin,
      ...plugins,
    ],
    output,
    onwarn: (msg, warn) => {
      if (!/Circular/.test(msg))
        warn(msg)
    },
    treeshake: {
      moduleSideEffects: false,
    },
  }
}