tsup.config.ts

import { log } from 'node:console'
import { existsSync, readFileSync } from 'node:fs'
import { resolve } from 'node:path'
import { defineConfig } from 'tsup'

// biome-ignore lint:
function getFileJson(file: string): Partial<Record<string, any>> {
  const filepath = resolve(process.cwd(), file)
  if (!existsSync(filepath)) return {}
  const str = readFileSync(filepath, 'utf-8')
  // biome-ignore lint:
  let json: any
  try {
    json = JSON.parse(str)
  } catch (e) {
    throw new Error(`Parse Error at ${filepath}: ${String(e)}`)
  }
  return json
}

export default defineConfig((options) => {
  if (!options.silent) log('Dir:', process.cwd())

  const [tsconfig, pkg] = ['tsconfig.json', 'package.json'].map((file) => getFileJson(file))

  return {
    entryPoints: ['./src'],
    outDir: tsconfig?.compilerOptions?.outDir ?? './dist',
    bundle: false,
    clean: !!process.argv.find((el) => el === '--define.env=prod')
  }
})