Function isPortAvailable

apps/cli/src/daemon.ts:237–267

(input: {
  hostname: string;
  port: number;
})

};

const isPortAvailable = (input: {
  hostname: string;
  port: number;
}): Effect.Effect<boolean, Error> =>
  Effect.tryPromise({
    try: () =>
      new Promise<boolean>((resolve) => {
        const server = createServer() as ProbeServer;
        const cleanup = () => {
          if (typeof server.removeAllListeners === "function") {
            server.removeAllListeners();
          }
        };

        server.once("error", () => {
          cleanup();
          resolve(false);
        });

        server.once("listening", () => {
          cleanup();
          server.close(() => resolve(true));
        });

        server.listen({ port: input.port, host: toProbeHost(input.hostname) });
      }),
    catch: (cause) =>
      cause instanceof Error
        ? cause
        : new Error(`Failed probing port availability: ${String(cause)}`),
  });

const pickEphemeralPort = (hostname: string): Effect.Effect<number, Error> =>
  Effect.tryPromise({