es-main

import esMain from 'es-main'; import path from 'node:path'; import { fileURLToPath } from 'node:url'; // In an ES Module, __filename and __dirname are not globally available. // This is a common pattern to derive them from import.meta.url. const __filename = fileURLToPath(import.meta.url); const __dirname = path.dirname(__filename); async function main() { if (esMain(import.meta)) { console.log(`[es-main] This module is being run directly.`); console.log(`Main file path: ${__filename}`); console.log(`Derived directory: ${__dirname}`); console.log(`Command line arguments: ${process.argv.slice(2).join(' ')}`); // Example: Run a main script task await new Promise(resolve => setTimeout(resolve, 1000)); console.log('Main script execution complete.'); } else { console.log(`[es-main] This module has been imported by another script.`); // You can export functions here for other modules to use, e.g., // export function someUtility() { /* ... */ } } } main();