build.js

const fs = require('node:fs');
const esbuild = require('esbuild');
const { join } = require('path');

const entryPoints = fs.readdirSync(process.cwd()).filter(
  (file) =>
    file.endsWith('.ts') &&
    // file !== 'core.ts' &&
    // file !== 'test-helpers.ts' &&
    // file !== 'helpers.ts' &&
    // file !== 'benchmarks.ts' &&
    !file.endsWith('.config.d.ts') &&
    !file.endsWith('.config.ts') &&
    !file.endsWith('.test.ts') &&
    fs.statSync(join(process.cwd(), file)).isFile()
);

let common = {
  entryPoints,
  bundle: true,
  sourcemap: 'external',
};

esbuild
  .build({
    ...common,
    outdir: 'lib/esm',
    format: 'esm',
    packages: 'external',
    tsconfig: './tsconfig.json',
  })
  .then(() => console.log('esm build success.'));

esbuild
  .build({
    ...common,
    outdir: 'lib/cjs',
    format: 'cjs',
    packages: 'external',
    tsconfig: './tsconfig.json',
  })
  .then(() => {
    const packageJson = JSON.stringify({ type: 'commonjs' });
    fs.writeFileSync(`${__dirname}/lib/cjs/package.json`, packageJson, 'utf8');

    console.log('cjs build success.');
  });

esbuild
  .build({
    ...common,
    entryPoints: ['index.ts'],
    outfile: 'lib/mostro.bundle.js',
    format: 'iife',
    globalName: 'MostroTools',
    define: {
      window: 'self',
      global: 'self',
      process: '{"env": {}}',
    },
    tsconfig: './tsconfig.json',
  })
  .then(() => console.log('standalone build success.'));