tsdown.config.ts

import { writeFileSync } from 'node:fs'
import { defineConfig } from 'tsdown'
import packageJSON from './package.json' with { type: 'json' }

export default defineConfig({
  entry: 'src/index.ts',
  fixedExtension: false,
  dts: true,
  tsconfig: './tsconfig.src.json', // https://github.com/sxzz/rolldown-plugin-dts/issues/55
  ignoreWatch: ['playground', 'playground-temp', 'test-results'],
  copy: [
    {
      from: 'node_modules/@vitejs/react-common/refresh-runtime.js',
      to: 'dist',
    },
    {
      from: 'LICENSE',
      to: 'dist',
    },
    {
      from: 'README.md',
      to: 'dist',
    },
    {
      from: 'types',
      to: 'dist',
    },
  ],
  onSuccess() {
    writeFileSync(
      'dist/package.json',
      JSON.stringify(
        {
          ...Object.fromEntries(
            Object.entries(packageJSON).filter(
              ([key, _val]) =>
                key !== 'devDependencies' &&
                key !== 'scripts' &&
                key !== 'private',
            ),
          ),
          exports: {
            '.': './index.js',
            './preamble': './types/preamble.d.ts',
          },
        },
        null,
        2,
      ),
    )
  },
})