c4dslbuilder/lib/utilities/port-utils.js

A CLI tool designed to compile a folder structure of markdowns and mermaid files into a site, pdf, single file markdown or a collection of markdowns with links - inspired by c4builder

import net from 'net';
export async function findAvailablePort(preferredPort) {
    let port = preferredPort;
    while (true) {
        const available = await isPortAvailable(port);
        if (available) {
            return port;
        }
        port += 1; // Try next port
    }
}
async function isPortAvailable(port) {
    return new Promise((resolve) => {
        const server = net
            .createServer()
            .once('error', () => resolve(false))
            .once('listening', () => {
            server.close();
            resolve(true);
        })
            .listen(port);
    });
}