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keksAccountGUI/node_modulesOLD/webpack-dev-server/lib/utils/findPort.js

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2019-08-11 18:48:02 +00:00
'use strict';
const pRetry = require('p-retry');
const portfinder = require('portfinder');
const defaultPort = require('./defaultPort');
const defaultTo = require('./defaultTo');
const tryParseInt = require('./tryParseInt');
function runPortFinder() {
return new Promise((resolve, reject) => {
portfinder.basePort = defaultPort;
portfinder.getPort((error, port) => {
if (error) {
return reject(error);
}
return resolve(port);
});
});
}
function findPort(port) {
if (port) {
return Promise.resolve(port);
}
// Try to find unused port and listen on it for 3 times,
// if port is not specified in options.
// Because NaN == null is false, defaultTo fails if parseInt returns NaN
// so the tryParseInt function is introduced to handle NaN
const defaultPortRetry = defaultTo(
tryParseInt(process.env.DEFAULT_PORT_RETRY),
3
);
return pRetry(runPortFinder, { retries: defaultPortRetry });
}
module.exports = findPort;