esbuild.config.ts

// esbuild.config.ts
import { build, Format, Platform, LogLevel } from 'esbuild';
import path from 'path';
import fs from 'fs';

const OUTPUT_DIR = 'dist';
const GENERATED_DIR = 'generated';

const shebangPlugin = {
  name: 'shebang',
  setup(build: any) {
    build.onEnd(result => {
      for (const output of result.outputFiles || []) {
        if (output.path.endsWith('cli.js')) {
          const shebang = '#!/usr/bin/env node\n';
          const contents = shebang + output.text;
          fs.writeFileSync(output.path, contents);
        }
      }
    });
  }
};

const sharedOptions = {
  bundle: true,
  platform: 'node' as Platform,
  format: 'esm' as Format,
  target: 'node16',
  sourcemap: true,
  minify: false,
  external: [
    "@modelcontextprotocol/sdk",
    "@modelcontextprotocol",
    "@redocly",
    "@ianvs/prettier-plugin-sort-imports",
    "prettier-plugin-packagejson",
    "ts-morph",
    "zod",
    "fs",
    "path",
    "node:perf_hooks",
    "yaml",
    "openapi-typescript",
    "remeda",
    "prettier",
    "express",
    "async_hooks",
    "commander",
    "node-stdlib-browser",
    "detect-port",
    "crypto",
    "stream",
    "http",
    "https",
    "url",
    "os",
    "child_process",
  ],
  plugins: [shebangPlugin],
  absWorkingDir: process.cwd(),
  logLevel: 'info' as LogLevel,
  alias: {
    src: path.resolve('./src')
  },
  mainFields: ['module', 'main'],
  resolveExtensions: ['.ts', '.js', '.mjs', '.jsx', '.json'],
  nodePaths: [path.join(process.cwd(), 'node_modules')]
};

// Build CLI bundle
await build({
  ...sharedOptions,
  entryPoints: ['./src/cli.ts'],
  outfile: path.join(OUTPUT_DIR, 'cli.js'),
  write: false,
}).then(result => {
  if (result.outputFiles) {
    for (const output of result.outputFiles) {
      if (output.path.endsWith('cli.js') ) {
        const shebang = '#!/usr/bin/env node\n';
        fs.writeFileSync(output.path, shebang + output.text);
      } else {
        fs.writeFileSync(output.path, output.text);
      }
    }
  }
});

// Build Runtime bundle
await build({
  ...sharedOptions,
  entryPoints: ['./src/runtime/index.ts'],
  outfile: path.join(OUTPUT_DIR, 'server.js'),
  write: false,
}).then(result => {
  if (result.outputFiles) {
    for (const output of result.outputFiles) {
      if (output.path.endsWith('server.js')) {
        const shebang = '#!/usr/bin/env node\n';
        fs.writeFileSync(output.path, shebang + output.text);
      } else {
        fs.writeFileSync(output.path, output.text);
      }
    }
  }
});