Function useLatestVersion

packages/react/src/components/update-card.tsx:69–104

(currentVersion: string | undefined)

}

function useLatestVersion(currentVersion: string | undefined) {
  // The channel shown in the upgrade command differs from the channel
  // fetched for comparison: the command always names a real channel, while
  // the fetch is skipped entirely for a version with nothing to compare.
  const displayChannel: UpdateChannel = currentVersion
    ? resolveUpdateChannel(currentVersion)
    : "latest";
  const fetchChannel = updateFetchChannel(currentVersion);
  const [latestVersion, setLatestVersion] = useState<string | null>(null);

  useEffect(() => {
    if (fetchChannel === null) return;
    let cancelled = false;
    void Effect.runPromiseExit(
      Effect.tryPromise({
        try: async () => {
          const res = await fetch(EXECUTOR_DIST_TAGS_PATH);
          if (!res.ok) return null;
          return (await res.json()) as Partial<Record<UpdateChannel, string>>;
        },
        catch: (cause) => cause,
      }),
    ).then((exit) => {
      if (!cancelled && Exit.isSuccess(exit)) {
        setLatestVersion(exit.value?.[fetchChannel] ?? null);
      }
    });
    return () => {
      cancelled = true;
    };
  }, [fetchChannel]);

  const updateAvailable = isUpdateAvailable(currentVersion, latestVersion);

  return { latestVersion, updateAvailable, channel: displayChannel };
}

// ── Card chrome ──────────────────────────────────────────────────────────