everything-dev/dist/infra/port-ownership.mjs

A consolidated product package for building Module Federation apps with oRPC APIs.

import { Effect } from "effect";
import { execFile } from "node:child_process";

//#region src/infra/port-ownership.ts
let lsofCached = null;
const execFileText = (path, args) => new Promise((resolve, reject) => {
	execFile(path, args, { timeout: 5e3 }, (error, stdout) => {
		if (error && !stdout) reject(error);
		else resolve(stdout);
	});
});
const isValidPort = (port) => Number.isInteger(port) && port > 0 && port <= 65535;
const ownerOfPort = (port, options) => Effect.callback((resume) => {
	(async () => {
		if (!isValidPort(port)) {
			resume(Effect.succeed(null));
			return;
		}
		const lsof = options?.lsofPath ?? "lsof";
		try {
			const stdout = await execFileText(lsof, [
				"-ti",
				`:${port}`,
				"-sTCP:LISTEN"
			]);
			const pid = Number.parseInt(stdout.trim().split("\n")[0] ?? "", 10);
			if (!Number.isInteger(pid) || pid <= 0) {
				resume(Effect.succeed(null));
				return;
			}
			try {
				const psOut = await execFileText(options?.psPath ?? "ps", [
					"-o",
					"command=",
					"-p",
					String(pid)
				]);
				resume(Effect.succeed({
					pid,
					command: psOut.trim() || "unknown"
				}));
			} catch {
				resume(Effect.succeed({
					pid,
					command: "unknown"
				}));
			}
		} catch (error) {
			if (error.code === "ENOENT") lsofCached = false;
			resume(Effect.succeed(null));
		}
	})();
});

//#endregion
export { ownerOfPort };
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