@ionic/app-scripts
Version:
Scripts for Ionic Projects
40 lines (39 loc) • 1.24 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var net = require("net");
function findClosestOpenPorts(host, ports) {
var promises = ports.map(function (port) { return findClosestOpenPort(host, port); });
return Promise.all(promises);
}
exports.findClosestOpenPorts = findClosestOpenPorts;
function findClosestOpenPort(host, port) {
function t(portToCheck) {
return isPortTaken(host, portToCheck).then(function (isTaken) {
if (!isTaken) {
return portToCheck;
}
return t(portToCheck + 1);
});
}
return t(port);
}
exports.findClosestOpenPort = findClosestOpenPort;
function isPortTaken(host, port) {
return new Promise(function (resolve, reject) {
var tester = net.createServer()
.once('error', function (err) {
if (err.code !== 'EADDRINUSE') {
return resolve(true);
}
resolve(true);
})
.once('listening', function () {
tester.once('close', function () {
resolve(false);
})
.close();
})
.listen(port, host);
});
}
exports.isPortTaken = isPortTaken;