On which thread are the SPUUpdaterDelegate and SPUStandardUserDriverDelegate methods called?

[al-skobelev]

Hello,
The Sparkle documentation states that SUUpdater methods must be called in the main thread. But I can't find a similar statement about which thread/queue the SPUUpdaterDelegate and SPUStandardUserDriverDelegate methods are being called. At the moment, it seems that all of them are called in the main queue, but the question is, is this behavior guaranteed, will it be supported, and won't it be silently changed in future versions of Sparkle? Can I rely on this when implementing them?

[zorgiepoo]

As long as you call Sparkle APIs on the main thread, it should be all main thread. Sparkle prefers to work on the main thread and that should be kept intact. The user driver particularly is very main thread driven.

As an outlier example, allowedSystemProfileKeysForUpdater: may be called from the same thread systemProfileArray is called on, but it's stated to call SPUUpdater should be used on the main thread. However I also didn't feel the need to prevent this method from being called on a different thread.