rollup.config.mjs

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