import { build } from 'esbuild';
import { writeFileSync, readFileSync } from 'fs';
// List of Node.js built-in modules that should not be bundled
const nodeBuiltins = [
'fs', 'path', 'crypto', 'http', 'https', 'url', 'util', 'stream',
'events', 'buffer', 'querystring', 'os', 'net', 'tls', 'zlib',
'child_process', 'cluster', 'dgram', 'dns', 'readline', 'repl',
'string_decoder', 'tty', 'vm', 'worker_threads', 'async_hooks',
'assert', 'console', 'module', 'process', 'punycode', 'sys', 'timers'
];
build({
entryPoints: ['server.js'],
bundle: true,
platform: 'node',
target: 'node18',
format: 'esm',
outfile: 'dist/hello3dmcp-server.js',
external: nodeBuiltins, // Don't bundle Node.js built-ins, but DO bundle express
minify: false, // Keep readable for debugging
sourcemap: false,
}).then(() => {
// Fix the __require function to handle Node.js built-ins
// This is necessary because express dependencies use dynamic requires
let code = readFileSync('dist/hello3dmcp-server.js', 'utf-8');
// Add require polyfill for Node.js built-ins
const requireFix = `
import { createRequire } from 'module';
const _require = createRequire(import.meta.url);
const nodeBuiltins = new Set([${nodeBuiltins.map(b => `'${b}'`).join(', ')}]);
`;
// Check if polyfill already exists (avoid duplicates)
if (!code.includes('const _require = createRequire')) {
code = requireFix + code;
}
// Replace esbuild's __require function to handle Node.js built-ins
// esbuild creates a wrapper that throws errors for dynamic requires
// We replace it to check for built-ins first and use createRequire
const lines = code.split('\n');
let found = false;
for (let i = 0; i < lines.length; i++) {
if (lines[i].includes('var __require') && lines[i].includes('@__PURE__')) {
// Find the end of the __require function definition
let j = i;
let braceCount = 0;
let parenCount = 0;
let foundFunctionCall = false;
// Count opening parens and braces from the start line
for (let char of lines[i]) {
if (char === '(') parenCount++;
if (char === ')') parenCount--;
if (char === '{') braceCount++;
if (char === '}') braceCount--;
}
// Continue until we find the closing of the function call
while (j < lines.length && (parenCount > 0 || braceCount > 0 || !foundFunctionCall)) {
j++;
if (j >= lines.length) break;
const line = lines[j];
for (let char of line) {
if (char === '(') parenCount++;
if (char === ')') parenCount--;
if (char === '{') braceCount++;
if (char === '}') braceCount--;
}
// Check if we've closed the function call
if (line.includes('});') && parenCount === 0 && braceCount === 0) {
foundFunctionCall = true;
break;
}
}
if (foundFunctionCall) {
// Replace with our fixed version that handles Node.js built-ins
// Handle both "events" and "node:events" formats
const replacement = `var __require = /* @__PURE__ */ (function(x) {
// Handle Node.js built-ins with or without "node:" prefix
const moduleName = x.startsWith('node:') ? x.slice(5) : x;
if (nodeBuiltins.has(moduleName)) {
return _require(x);
}
if (typeof require !== "undefined")
return require.apply(this, arguments);
throw Error('Dynamic require of "' + x + '" is not supported');
});`;
lines.splice(i, j - i + 1, replacement);
code = lines.join('\n');
found = true;
console.log('✅ __require function patched to handle Node.js built-ins');
break;
}
}
}
if (!found) {
console.error('❌ Could not find __require function to patch');
process.exit(1);
}
writeFileSync('dist/hello3dmcp-server.js', code);
console.log('✅ Bundle created with express bundled (self-contained package)');
}).catch(() => process.exit(1));
