build.js

import path from 'node:path'
// Utilities from @tangible/roller
import fs from 'fs-extra'
import esbuild from 'esbuild'
import glob from 'fast-glob'

async function buildForNpm() {
  const sourceFolder = `assets/src`
  const targetFolder = `publish/npm`

  console.log('Prepare target folder', targetFolder)
  if (await fs.exists(targetFolder)) {
    await fs.remove(targetFolder)
  }
  await fs.ensureDir(targetFolder)

  console.log('Build files from', sourceFolder)

  let i = 0

  for (const file of await glob(`**/*.{js,jsx,ts,tsx,scss}`, {
    cwd: sourceFolder,
  })) {
    i++
    console.log(file)

    const extension = file.split('.').pop()
    const sourceFile = path.join(sourceFolder, file)

    if (extension === 'scss') {
      // Copy as is
      const targetFile = path.join(targetFolder, file)
      await fs.copy(sourceFile, targetFile)
      continue
    }

    // Compile
    const targetFile = path.join(targetFolder, file.replace(extension, 'js'))

    await esbuild.build({
      entryPoints: [sourceFile],
      bundle: false,
      outfile: targetFile,
    })
  }

  console.log('Built', i, 'files')

  for (const file of ['package.json', 'readme.md']) {
    await fs.copy(file, path.join(targetFolder, file))
    console.log('Copied', file)
  }
}

async function help() {
  console.log(`Usage: node build.js [command] [...options]
Available commands:
  npm - Build NPM package`)
}

const [command, ...args] = process.argv.slice(2)
const run =
  {
    npm: buildForNpm,
  }[command] || help

run().catch(console.error)