blob: fbd74e6e6ed2b9cb580070f1c1f0c6bfe2673d63 (
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'use strict';
const net = require('net');
const getPort = options => new Promise((resolve, reject) => {
// For backwards compatibility with number-only input
// TODO: Remove this in the next major version
if (typeof options === 'number') {
options = {
port: options
};
}
const server = net.createServer();
server.unref();
server.on('error', reject);
server.listen(options, () => {
const port = server.address().port;
server.close(() => {
resolve(port);
});
});
});
module.exports = options => options ?
getPort(options).catch(() => getPort(0)) :
getPort(0);
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