Function waitForReady

packages/e2e-tests/src/opencode-runner/spawn.ts:190–218

(url: string, timeoutMs = 300_000)

// finishes in <2s. The bump to 300s covers CI cold-start without papering over
// genuine readiness failures — 5 minutes is still far above any realistic boot.
async function waitForReady(url: string, timeoutMs = 300_000): Promise<void> {
    const deadline = Date.now() + timeoutMs;
    const FETCH_TIMEOUT_MS = 2_000;
    let lastFetchErr: unknown = null;
    let fetchAttempts = 0;

    while (Date.now() < deadline) {
        try {
            fetchAttempts++;
            const res = await fetch(`${url}/doc`, {
                method: "GET",
                signal: AbortSignal.timeout(FETCH_TIMEOUT_MS),
            });
            if (res.ok || res.status === 404 || res.status === 401) {
                // Server is responding — any HTTP response means it booted.
                return;
            }
        } catch (err) {
            lastFetchErr = err;
        }
        await Bun.sleep(200);
    }
    throw new Error(
        `opencode serve did not become ready in ${timeoutMs}ms.\n` +
            `  url=${url}/doc\n` +
            `  fetchAttempts=${fetchAttempts}\n` +
            `  fetchLastErr=${String(lastFetchErr)}`,
    );
}

export async function spawnOpencode(opts: SpawnOptions): Promise<SpawnedOpencode> {
    const env = createIsolatedEnv();