> On Dec 21, 2019, at 13:43, Jens Alfke <j...@mooseyard.com> wrote: > > > >> On Dec 21, 2019, at 10:18 AM, Gabriel Zachmann via Cocoa-dev >> <cocoa-dev@lists.apple.com> wrote: >> >> Right. I was hoping there is an easy way to do this. >> Something like a recursive check sum over the whole directory tree that the >> OS might keep. >> I don't want to do a complete tree traversal every time the app launches. > > I think you'll need to do it yourself. The FSEvents API isn't going to keep > an infinitely long history; it certainly won't go back to before the time the > OS booted.
Yea, the documentation does a good job describing what the circumstances are that are not covered. > > You can shorten the traversal by keeping the mod date of every directory. > Then if the mod date hasn't changed, you don't need to scan the directory > contents. > > You can keep the data set smaller by keeping only a hash of the collected > names/mod dates/sizes of the files in each directory. But you do need to keep > the info for each subdirectory to do the above optimization. > > —Jens _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
