rollup.config.mjs

   1 import * as os from 'node:os'
   2 import { env } from 'node:process'
   3 import { dts } from 'rollup-plugin-dts'
   4 import terser from '@rollup/plugin-terser'
   5 import typescript from '@rollup/plugin-typescript'
   6 import analyze from 'rollup-plugin-analyzer'
   7 import command from 'rollup-plugin-command'
   8 import del from 'rollup-plugin-delete'
   9 import { defineConfig } from 'rollup'
  10
  11 const availableParallelism = () => {
  12   let availableParallelism = 1
  13   try {
  14     availableParallelism = os.availableParallelism()
  15   } catch {
  16     const cpus = os.cpus()
  17     if (Array.isArray(cpus) && cpus.length > 0) {
  18       availableParallelism = cpus.length
  19     }
  20   }
  21   return availableParallelism
  22 }
  23
  24 const isDevelopmentBuild = env.BUILD === 'development'
  25 const isAnalyzeBuild = env.ANALYZE
  26 const isDocumentationBuild = env.DOCUMENTATION
  27 const sourcemap = env.SOURCEMAP !== 'false'
  28
  29 const maxWorkers = Math.floor(availableParallelism() / 2)
  30
  31 export default defineConfig([
  32   {
  33     input: './src/index.ts',
  34     strictDeprecations: true,
  35     output: [
  36       {
  37         format: 'cjs',
  38         ...(isDevelopmentBuild && {
  39           dir: './lib',
  40           preserveModules: true,
  41           preserveModulesRoot: './src'
  42         }),
  43         ...(!isDevelopmentBuild && {
  44           file: './lib/index.js',
  45           plugins: [terser({ maxWorkers })]
  46         }),
  47         ...(sourcemap && {
  48           sourcemap
  49         })
  50       },
  51       {
  52         format: 'esm',
  53         ...(isDevelopmentBuild && {
  54           dir: './lib',
  55           entryFileNames: '[name].mjs',
  56           chunkFileNames: '[name]-[hash].mjs',
  57           preserveModules: true,
  58           preserveModulesRoot: './src'
  59         }),
  60         ...(!isDevelopmentBuild && {
  61           file: './lib/index.mjs',
  62           plugins: [terser({ maxWorkers })]
  63         }),
  64         ...(sourcemap && {
  65           sourcemap
  66         })
  67       }
  68     ],
  69     external: [/^node:*/],
  70     plugins: [
  71       typescript({
  72         tsconfig: './tsconfig.build.json',
  73         compilerOptions: {
  74           sourceMap: sourcemap
  75         }
  76       }),
  77       del({
  78         targets: ['./lib/*']
  79       }),
  80       Boolean(isAnalyzeBuild) && analyze(),
  81       Boolean(isDocumentationBuild) && command('pnpm typedoc')
  82     ]
  83   },
  84   {
  85     input: './lib/dts/index.d.ts',
  86     output: [{ format: 'esm', file: './lib/index.d.ts' }],
  87     external: [/^node:*/],
  88     plugins: [
  89       dts(),
  90       del({
  91         targets: ['./lib/dts'],
  92         hook: 'buildEnd'
  93       }),
  94       Boolean(isAnalyzeBuild) && analyze()
  95     ]
  96   }
  97 ])