esbuild.config.ts

import fs from 'node:fs/promises';

import { build, BuildOptions } from 'esbuild';

import { dTSPathAliasPlugin } from './src';

import { devDependencies, peerDependencies } from './package.json';

const DIST_DIR = 'dist';
const EXTERNAL_PACKAGES = Object.keys({ ...devDependencies, ...peerDependencies });

const baseOptions: BuildOptions = {
  target: 'es2020',
  external: EXTERNAL_PACKAGES,
  platform: 'node',
  entryPoints: ['./src/index.ts'],
  bundle: true,
  treeShaking: true,
  sourcemap: false,
  minify: false,
};

await fs.rm(DIST_DIR, { force: true, recursive: true });

const esmBuild = build({
  ...baseOptions,
  splitting: true,
  format: 'esm',
  outdir: `${DIST_DIR}/esm`,
  banner: {
    // fix Error: Dynamic require of `x`(any cjs module) is not supported
    js: [
      "import { createRequire as topLevelCreateRequire } from 'module';",
      'const require = topLevelCreateRequire(import.meta.url);',
    ].join('\n'),
  },
  plugins: [dTSPathAliasPlugin({ outputPath: `${DIST_DIR}/typings`, debug: true })],
});

const cjsBuild = build({
  ...baseOptions,
  format: 'cjs',
  outdir: `${DIST_DIR}/cjs`,
});

await Promise.all([esmBuild, cjsBuild]);