rollup.config.js

// @ts-check
import { readJsonSync } from 'fs-extra/esm'
import { builtinModules } from 'node:module'
import { defineConfig } from 'rollup'
import json from '@rollup/plugin-json'
import { nodeResolve } from '@rollup/plugin-node-resolve'
import commonjs from '@rollup/plugin-commonjs'
import esbuild from 'rollup-plugin-esbuild'
import { visualizer } from 'rollup-plugin-visualizer'

const pkg = readJsonSync('./package.json')

// more faster than microbundle
export default defineConfig({
    input: {
        index: 'src/index.ts'
    },
    output: [
        {
            dir: 'dist',
            entryFileNames: '[name].mjs',
            format: 'es',
            sourcemap: true
        },
        {
            dir: 'dist',
            entryFileNames: '[name].cjs',
            format: 'cjs',
            sourcemap: true
        }
    ],
    external: [
        ...Object.keys(pkg.dependencies || {}),
        ...builtinModules,
        /node:/
    ],
    plugins: [
        json(),
        esbuild({
            platform: 'node',
            minify: true
        }),
        nodeResolve(),
        commonjs(),
        visualizer({
            filename: '.stats/stats.html'
        })
    ]
})