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     availableParallelism = os.availableParallelism()
  16   } catch {
  17     const cpus = os.cpus()
  18     if (Array.isArray(cpus) && cpus.length > 0) {
  19       availableParallelism = cpus.length
  20     }
  21   }
  22   return availableParallelism
  23 }
  24
  25 const isDevelopmentBuild = env.BUILD === 'development'
  26 const isAnalyzeBuild = Boolean(env.ANALYZE)
  27 const isDocumentationBuild = Boolean(env.DOCUMENTATION)
  28 const sourcemap = env.SOURCEMAP !== 'false'
  29
  30 const maxWorkers = Math.floor(availableParallelism() / 2)
  31
  32 export default defineConfig([
  33   {
  34     input: './src/index.ts',
  35     strictDeprecations: true,
  36     output: [
  37       {
  38         format: 'cjs',
  39         ...(isDevelopmentBuild
  40           ? {
  41               dir: './lib',
  42               entryFileNames: '[name].cjs',
  43               chunkFileNames: '[name]-[hash].cjs',
  44               preserveModules: true,
  45               preserveModulesRoot: './src'
  46             }
  47           : {
  48               file: './lib/index.cjs',
  49               plugins: [terser({ maxWorkers })]
  50             }),
  51         ...(sourcemap && {
  52           sourcemap
  53         })
  54       },
  55       {
  56         format: 'esm',
  57         ...(isDevelopmentBuild
  58           ? {
  59               dir: './lib',
  60               entryFileNames: '[name].mjs',
  61               chunkFileNames: '[name]-[hash].mjs',
  62               preserveModules: true,
  63               preserveModulesRoot: './src'
  64             }
  65           : {
  66               file: './lib/index.mjs',
  67               plugins: [terser({ maxWorkers })]
  68             }),
  69         ...(sourcemap && {
  70           sourcemap
  71         })
  72       }
  73     ],
  74     external: [/^node:*/],
  75     plugins: [
  76       typescript({
  77         tsconfig: './tsconfig.build.json',
  78         compilerOptions: {
  79           sourceMap: sourcemap
  80         }
  81       }),
  82       del({
  83         targets: ['./lib/*']
  84       }),
  85       isAnalyzeBuild && analyze(),
  86       isDocumentationBuild && command('pnpm typedoc')
  87     ]
  88   },
  89   {
  90     input: './lib/dts/index.d.ts',
  91     strictDeprecations: true,
  92     output: [{ format: 'esm', file: './lib/index.d.ts' }],
  93     external: [/^node:*/],
  94     plugins: [
  95       dts(),
  96       del({
  97         targets: ['./lib/dts'],
  98         hook: 'buildEnd'
  99       }),
 100       isAnalyzeBuild && analyze()
 101     ]
 102   }
 103 ])