MaxMilton/ekscss

import esbuild, { type BuildOptions } from 'esbuild';

const mode = process.env.NODE_ENV ?? 'production';
const dev = mode === 'development';

console.time('prebuild');
await Bun.$`rm -rf dist`;
console.timeEnd('prebuild');

// Node CJS bundle
const esbuildConfig1: BuildOptions = {
  entryPoints: ['src/index.ts'],
  outfile: 'dist/index.js',
  platform: 'node',
  target: ['node12'],
  define: {
    'process.env.NODE_ENV': JSON.stringify(mode),
  },
  external: ['ekscss', 'stylis'],
  bundle: true,
  sourcemap: true,
  minify: !dev,
  metafile: !dev && process.stdout.isTTY,
  logLevel: 'debug',
};

// Node ESM bundle
const esbuildConfig2: BuildOptions = {
  entryPoints: ['src/index.ts'],
  outfile: 'dist/index.mjs',
  platform: 'node',
  format: 'esm',
  target: ['node16'],
  define: {
    'process.env.NODE_ENV': JSON.stringify(mode),
  },
  external: ['ekscss', 'stylis'],
  bundle: true,
  sourcemap: true,
  minify: !dev,
  metafile: !dev && process.stdout.isTTY,
  logLevel: 'debug',
};

if (dev) {
  const context1 = await esbuild.context(esbuildConfig1);
  const context2 = await esbuild.context(esbuildConfig2);
  await Promise.all([context1.watch(), context2.watch()]);
} else {
  const out1 = await esbuild.build(esbuildConfig1);
  const out2 = await esbuild.build(esbuildConfig2);

  if (out1.metafile) console.log(await esbuild.analyzeMetafile(out1.metafile));
  if (out2.metafile) console.log(await esbuild.analyzeMetafile(out2.metafile));
}