build.js

/**
 * @typedef {import('type-fest').PackageJson} PackageJson
 */

import assert from 'node:assert/strict'
import fs from 'node:fs/promises'
import path from 'node:path'

const languageNames = new Intl.DisplayNames(['en'], {type: 'language'})

const cussUrl = new URL('node_modules/cuss/', import.meta.url)
const pkgUrl = new URL('package.json', cussUrl)
/** @type {PackageJson} */
const pkg = JSON.parse(String(await fs.readFile(pkgUrl)))

assert(pkg.exports, 'expected `exports` in `cuss`')

const files = [...new Set(Object.values(pkg.exports))]
let index = -1

/* eslint-disable no-await-in-loop */
while (++index < files.length) {
  const basename = files[index]

  assert(typeof basename === 'string', 'expected string exports in `cuss`')
  const modUrl = new URL(basename, cussUrl)
  /** @type {{cuss: Record<string, number>}} */
  const mod = await import(modUrl.href)
  const profanities = Object.keys(mod.cuss)

  const stem = path.basename(basename, path.extname(basename))
  const code = stem === 'index' ? 'en' : stem
  const language = languageNames.of(code)

  await fs.writeFile(
    basename,
    '/**\n * List of ' +
      language +
      ' profane words.\n */\nexport const profanities = ' +
      JSON.stringify(profanities, null, 2) +
      '\n'
  )

  console.log(
    '✓ ' + basename + ' (' + language + '; ' + profanities.length + ')'
  )
}
/* eslint-enable no-await-in-loop */