1 | "use strict";
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2 | Object.defineProperty(exports, "__esModule", { value: true });
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3 | var net = require("net");
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4 | function findClosestOpenPorts(host, ports) {
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5 | var promises = ports.map(function (port) { return findClosestOpenPort(host, port); });
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6 | return Promise.all(promises);
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7 | }
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8 | exports.findClosestOpenPorts = findClosestOpenPorts;
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9 | function findClosestOpenPort(host, port) {
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10 | function t(portToCheck) {
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11 | return isPortTaken(host, portToCheck).then(function (isTaken) {
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12 | if (!isTaken) {
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13 | return portToCheck;
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14 | }
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15 | return t(portToCheck + 1);
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16 | });
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17 | }
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18 | return t(port);
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19 | }
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20 | exports.findClosestOpenPort = findClosestOpenPort;
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21 | function isPortTaken(host, port) {
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22 | return new Promise(function (resolve, reject) {
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23 | var tester = net.createServer()
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24 | .once('error', function (err) {
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25 | if (err.code !== 'EADDRINUSE') {
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26 | return resolve(true);
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27 | }
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28 | resolve(true);
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29 | })
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30 | .once('listening', function () {
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31 | tester.once('close', function () {
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32 | resolve(false);
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33 | })
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34 | .close();
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35 | })
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36 | .listen(port, host);
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37 | });
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38 | }
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39 | exports.isPortTaken = isPortTaken;
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