#!/usr/bin/env node
/**
* Check bundle size to ensure it stays reasonable
* Warns if the npm package exceeds size thresholds
*/
import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const ROOT = path.resolve(__dirname, '..');
// Size thresholds in MB
const WARN_SIZE_MB = 8;
const ERROR_SIZE_MB = 15;
async function checkBundleSize() {
const packageDir = path.join(ROOT, 'packages', 'mcp-debugger');
const distDir = path.join(packageDir, 'dist');
// Check if dist exists
if (!fs.existsSync(distDir)) {
console.log('⚠️ No dist directory found. Run `pnpm build` first.');
process.exit(0);
}
// Get cli.mjs size (the main bundle)
const cliPath = path.join(distDir, 'cli.mjs');
if (!fs.existsSync(cliPath)) {
console.log('⚠️ No cli.mjs found. Bundle may not have been created.');
process.exit(0);
}
const stats = fs.statSync(cliPath);
const sizeKB = stats.size / 1024;
const sizeMB = sizeKB / 1024;
console.log('📦 Bundle Size Check');
console.log('===================');
console.log(`Bundle: ${cliPath}`);
console.log(`Size: ${sizeMB.toFixed(2)} MB (${sizeKB.toFixed(2)} KB)`);
console.log('');
if (sizeMB > ERROR_SIZE_MB) {
console.log(`❌ ERROR: Bundle exceeds ${ERROR_SIZE_MB} MB!`);
console.log('This is too large for the "batteries included" approach.');
console.log('Consider:');
console.log(' - Splitting into separate packages');
console.log(' - Moving to dynamic loading');
console.log(' - Removing unnecessary dependencies');
process.exit(1);
} else if (sizeMB > WARN_SIZE_MB) {
console.log(`⚠️ WARNING: Bundle exceeds ${WARN_SIZE_MB} MB`);
console.log('Still acceptable, but getting large.');
console.log('Monitor future additions carefully.');
console.log('');
} else {
console.log(`✅ Bundle size is good (< ${WARN_SIZE_MB} MB)`);
console.log('');
}
// Show what's in the bundle (if metafile exists)
const metaPath = path.join(distDir, 'bundle-meta.json');
if (fs.existsSync(metaPath)) {
const meta = JSON.parse(fs.readFileSync(metaPath, 'utf8'));
const inputs = Object.keys(meta.inputs || {});
console.log('📄 Bundle Contents:');
console.log(` Total inputs: ${inputs.length} files`);
// Check for adapter presence
const hasJS = inputs.some(f => f.includes('adapter-javascript'));
const hasPython = inputs.some(f => f.includes('adapter-python'));
const hasMock = inputs.some(f => f.includes('adapter-mock'));
console.log(' Adapters included:');
console.log(` ${hasJS ? '✅' : '❌'} JavaScript`);
console.log(` ${hasPython ? '✅' : '❌'} Python`);
console.log(` ${hasMock ? '✅' : '❌'} Mock`);
if (!hasJS) {
console.log('');
console.log('⚠️ WARNING: JavaScript adapter not found in bundle!');
console.log('This will break npx distribution.');
}
}
console.log('');
console.log('Thresholds:');
console.log(` Warning: ${WARN_SIZE_MB} MB`);
console.log(` Error: ${ERROR_SIZE_MB} MB`);
}
checkBundleSize().catch(error => {
console.error('Error checking bundle size:', error);
process.exit(1);
});
