Files
diachron/express/cli.ts

56 lines
1.3 KiB
TypeScript

import { parseArgs } from "node:util";
const { values } = parseArgs({
options: {
listen: {
type: "string",
short: "l",
},
"log-address": {
type: "string",
default: "8085",
},
},
strict: true,
allowPositionals: false,
});
function parseListenAddress(listen: string | undefined): {
host: string;
port: number;
} {
const defaultHost = "127.0.0.1";
const defaultPort = 3500;
if (!listen) {
return { host: defaultHost, port: defaultPort };
}
const lastColon = listen.lastIndexOf(":");
if (lastColon === -1) {
// Just a port number
const port = parseInt(listen, 10);
if (Number.isNaN(port)) {
throw new Error(`Invalid listen address: ${listen}`);
}
return { host: defaultHost, port };
}
const host = listen.slice(0, lastColon);
const port = parseInt(listen.slice(lastColon + 1), 10);
if (Number.isNaN(port)) {
throw new Error(`Invalid port in listen address: ${listen}`);
}
return { host, port };
}
const listenAddress = parseListenAddress(values.listen);
const logAddress = parseListenAddress(values["log-address"]);
export const cli = {
listen: listenAddress,
logAddress,
};