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
  28 const maxWorkers = Math.floor(availableParallelism() / 2)
  29
  30 export default defineConfig([
  31   {
  32     input: './src/index.ts',
  33     strictDeprecations: true,
  34     output: [
  35       {
  36         format: 'cjs',
  37         sourcemap: true,
  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       },
  48       {
  49         format: 'esm',
  50         sourcemap: true,
  51         ...(isDevelopmentBuild && {
  52           dir: './lib',
  53           entryFileNames: '[name].mjs',
  54           chunkFileNames: '[name]-[hash].mjs',
  55           preserveModules: true,
  56           preserveModulesRoot: './src'
  57         }),
  58         ...(!isDevelopmentBuild && {
  59           file: './lib/index.mjs',
  60           plugins: [terser({ maxWorkers })]
  61         })
  62       }
  63     ],
  64     external: [/^node:*/],
  65     plugins: [
  66       typescript({
  67         tsconfig: './tsconfig.build.json',
  68         compilerOptions: {
  69           sourceMap: true
  70         }
  71       }),
  72       del({
  73         targets: ['./lib/*']
  74       }),
  75       Boolean(isAnalyzeBuild) && analyze(),
  76       Boolean(isDocumentationBuild) && command('pnpm typedoc')
  77     ]
  78   },
  79   {
  80     input: './lib/dts/index.d.ts',
  81     output: [{ format: 'esm', file: './lib/index.d.ts' }],
  82     external: [/^node:*/],
  83     plugins: [
  84       dts(),
  85       del({
  86         targets: ['./lib/dts'],
  87         hook: 'buildEnd'
  88       }),
  89       Boolean(isAnalyzeBuild) && analyze()
  90     ]
  91   }
  92 ])