@laiyon/create-wasapi/dist/utils/portUtils.js

CLI to create WhatsApp bot projects with Wasapi and BuilderBot

// Helper function to find free port
export async function getFreePort(startPort) {
    const net = await import("net");
    return new Promise((resolve) => {
        const server = net.createServer();
        server.listen(startPort, () => {
            const port = server.address()?.port || startPort;
            server.close(() => resolve(port));
        });
        server.on("error", () => {
            resolve(getFreePort(startPort + 1));
        });
    });
}