(port)
| 11 | const MAX_PROBE = 50; |
| 12 | |
| 13 | async function isFree(port) { |
| 14 | return new Promise((resolve) => { |
| 15 | const srv = net.createServer(); |
| 16 | srv.unref(); |
| 17 | srv.once('error', () => { |
| 18 | resolve(false); |
| 19 | }); |
| 20 | srv.once('listening', () => { |
| 21 | srv.close(() => { |
| 22 | resolve(true); |
| 23 | }); |
| 24 | }); |
| 25 | srv.listen({ port, host: '127.0.0.1', exclusive: true }); |
| 26 | }); |
| 27 | } |
| 28 | |
| 29 | async function pickPort(startPort, exclude = new Set()) { |
| 30 | for (let port = startPort; port < startPort + MAX_PROBE; port += 1) { |