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 = Boolean(env.ANALYZE)
  26 const isDocumentationBuild = Boolean(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           ? {
  40               dir: './lib',
  41               entryFileNames: '[name].cjs',
  42               chunkFileNames: '[name]-[hash].cjs',
  43               preserveModules: true,
  44               preserveModulesRoot: './src'
  45             }
  46           : {
  47               file: './lib/index.cjs',
  48               plugins: [terser({ maxWorkers })]
  49             }),
  50         ...(sourcemap && {
  51           sourcemap
  52         })
  53       },
  54       {
  55         format: 'esm',
  56         ...(isDevelopmentBuild
  57           ? {
  58               dir: './lib',
  59               entryFileNames: '[name].mjs',
  60               chunkFileNames: '[name]-[hash].mjs',
  61               preserveModules: true,
  62               preserveModulesRoot: './src'
  63             }
  64           : {
  65               file: './lib/index.mjs',
  66               plugins: [terser({ maxWorkers })]
  67             }),
  68         ...(sourcemap && {
  69           sourcemap
  70         })
  71       }
  72     ],
  73     external: [/^node:*/],
  74     plugins: [
  75       typescript({
  76         tsconfig: './tsconfig.build.json',
  77         compilerOptions: {
  78           sourceMap: sourcemap
  79         }
  80       }),
  81       del({
  82         targets: ['./lib/*']
  83       }),
  84       isAnalyzeBuild && analyze(),
  85       isDocumentationBuild && command('pnpm typedoc')
  86     ]
  87   },
  88   {
  89     input: './lib/dts/index.d.ts',
  90     strictDeprecations: true,
  91     output: [{ format: 'esm', file: './lib/index.d.ts' }],
  92     external: [/^node:*/],
  93     plugins: [
  94       dts(),
  95       del({
  96         targets: ['./lib/dts'],
  97         hook: 'buildEnd'
  98       }),
  99       isAnalyzeBuild && analyze()
 100     ]
 101   }
 102 ])