@slsplus/ui/dist/utils/find-port.js

UI Tool for Serverless Plus CLI

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const tslib_1 = require("tslib");
const p_retry_1 = tslib_1.__importDefault(require("p-retry"));
const portfinder_1 = tslib_1.__importDefault(require("portfinder"));
const defaultPort = 3000;
function defaultTo(value, def) {
    return value == null ? def : value;
}
function tryParseInt(input) {
    const output = parseInt(input, 10);
    if (Number.isNaN(output)) {
        return null;
    }
    return output;
}
function runPortFinder() {
    return new Promise((resolve, reject) => {
        portfinder_1.default.basePort = defaultPort;
        portfinder_1.default.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 p_retry_1.default(runPortFinder, { retries: defaultPortRetry });
}
exports.default = findPort;