rollup.config.mjs

   1 import * as os from 'node:os'
   2 import { env } from 'node:process'
   3
   4 import terser from '@rollup/plugin-terser'
   5 import typescript from '@rollup/plugin-typescript'
   6 import { defineConfig } from 'rollup'
   7 import analyze from 'rollup-plugin-analyzer'
   8 import command from 'rollup-plugin-command'
   9 import del from 'rollup-plugin-delete'
  10 import { dts } from 'rollup-plugin-dts'
  11
  12 const availableParallelism = () => {
  13   let availableParallelism = 1
  14   try {
  15     // eslint-disable-next-line n/no-unsupported-features/node-builtins
  16     availableParallelism = os.availableParallelism()
  17   } catch {
  18     const cpus = os.cpus()
  19     if (Array.isArray(cpus) && cpus.length > 0) {
  20       availableParallelism = cpus.length
  21     }
  22   }
  23   return availableParallelism
  24 }
  25
  26 const isDevelopmentBuild = env.BUILD === 'development'
  27 const isAnalyzeBuild = Boolean(env.ANALYZE)
  28 const isDocumentationBuild = Boolean(env.DOCUMENTATION)
  29 const sourcemap = env.SOURCEMAP !== 'false'
  30
  31 const maxWorkers = Math.floor(availableParallelism() / 2)
  32
  33 export default defineConfig([
  34   {
  35     input: './src/index.ts',
  36     strictDeprecations: true,
  37     output: [
  38       {
  39         format: 'cjs',
  40         ...(isDevelopmentBuild
  41           ? {
  42               dir: './lib',
  43               entryFileNames: '[name].cjs',
  44               chunkFileNames: '[name]-[hash].cjs',
  45               preserveModules: true,
  46               preserveModulesRoot: './src',
  47             }
  48           : {
  49               file: './lib/index.cjs',
  50               plugins: [terser({ maxWorkers })],
  51             }),
  52         ...(sourcemap && {
  53           sourcemap,
  54         }),
  55       },
  56       {
  57         format: 'esm',
  58         ...(isDevelopmentBuild
  59           ? {
  60               dir: './lib',
  61               entryFileNames: '[name].mjs',
  62               chunkFileNames: '[name]-[hash].mjs',
  63               preserveModules: true,
  64               preserveModulesRoot: './src',
  65             }
  66           : {
  67               file: './lib/index.mjs',
  68               plugins: [terser({ maxWorkers })],
  69             }),
  70         ...(sourcemap && {
  71           sourcemap,
  72         }),
  73       },
  74     ],
  75     external: [/^node:*/],
  76     plugins: [
  77       typescript({
  78         tsconfig: './tsconfig.build.json',
  79         compilerOptions: {
  80           sourceMap: sourcemap,
  81         },
  82       }),
  83       del({
  84         targets: ['./lib/*'],
  85       }),
  86       isAnalyzeBuild && analyze(),
  87       isDocumentationBuild && command('pnpm typedoc'),
  88     ],
  89   },
  90   {
  91     input: './lib/dts/index.d.ts',
  92     strictDeprecations: true,
  93     output: [{ format: 'esm', file: './lib/index.d.ts' }],
  94     external: [/^node:*/],
  95     plugins: [
  96       dts(),
  97       del({
  98         targets: ['./lib/dts'],
  99         hook: 'buildEnd',
 100       }),
 101       isAnalyzeBuild && analyze(),
 102     ],
 103   },
 104 ])