esbuild.config.js

import { build, context } from 'esbuild';
import { nodeExternalsPlugin } from 'esbuild-node-externals';

const isProduction = process.env.NODE_ENV === 'production';
const isWatch = process.argv.includes('--watch');

const config = {
  entryPoints: ['src/index.ts'],
  bundle: true,
  platform: 'node',
  format: 'esm',
  mainFields: ['module', 'main'],
  conditions: ['import'],
  sourcemap: !isProduction,
  minify: isProduction,
  target: ['node18'],
  outfile: 'dist/bundle.js',
  external: [
    '@modelcontextprotocol/sdk',
    'viem',
    'ethers',
    'bitcoinjs-lib',
    'ecpair',
    'tiny-secp256k1',
    'light-bolt11-decoder',
    'zod',
    'pino',
    'express',
    'crypto',
    'fs',
    'path',
    'url',
    'os',
    'util'
  ],
  plugins: [
    nodeExternalsPlugin({
      allowWorkspaces: false,
      devDependencies: false
    })
  ],
  define: {
    'process.env.NODE_ENV': `"${process.env.NODE_ENV || 'development'}"`
  },
  logLevel: 'info'
};

async function run() {
  if (isWatch) {
    const ctx = await context({
      ...config,
      plugins: [
        ...config.plugins,
        {
          name: 'watch-plugin',
          setup(build) {
            build.onEnd((result) => {
              if (result.errors.length > 0) {
                console.error('Watch build failed:', result.errors);
              } else {
                console.log('Watch build succeeded');
              }
            });
          }
        }
      ]
    });
    await ctx.watch();
    console.log('Watching for changes...');
  } else {
    await build(config);
  }
}

run().catch(() => {
  process.exit(1);
});