FinderSync - finder extension doesn't register folder updates on /Volumes/ (mounted drives)
Originator: | stefan.szekeres | ||
Number: | rdar://34362783 | Date Originated: | 09.11.2017 |
Status: | open | Resolved: | |
Product: | macOS FinderSync (Finder plugin extension) | Product Version: | |
Classification: | bug | Reproducible: | 100% |
Summary: A finder extension (FinderSync) primary method (-beginObservingDirectoryAtURL:) is not called only on /Volumes if registered to monitor root "/" folder. Steps to Reproduce: 1. Created a sample FinderSync ("Finder Sync") application. 2. It is sandboxed 3. It is signed and embedded in our .app with signing. 4. @interface FinderSync : FIFinderSync 5. in my init, in the implementation I have: self.myFolderURL = [NSURL fileURLWithPath:@"/"]; [FIFinderSyncController defaultController].directoryURLs = [NSSet setWithObject:self.myFolderURL]; note: So basically I'm watching the root folder including /Volumes; 6. I implement the protocol - (void)beginObservingDirectoryAtURL:(NSURL *)url { // The user is now seeing the container's contents. // If they see it in more than one view at a time, we're only told once. NSLog(@"beginObservingDirectoryAtURL:%@", url.filePathURL); self.beginObserving = [url copy]; } Expected Results: - (void)beginObservingDirectoryAtURL:(NSURL *)url should be called upon clicking on a folder on a mounted drive under /Volumes Actual Results: It is not called. Neither - (void)endObservingDirectoryAtURL:(NSURL *)url But only on /Volumes, it works on any other folder on my tested systems. Also the selected files are properly loaded under /Volumes, but not the folders. Version/Build: macOS 10.10.5, 10.12.3, 10.12.6, 10.13 developer beta 9 (17A360a)
Comments
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Limitation of FinderSync extensions
The effect of Finder Sync extensions doesn't cross file system boundaries; this is poorly documented but empirically true through at least 10.13.3. It's probably a result of the intended use case to monitor Dropbox-like folders rather than extend the Finder's contextual menu; I suspect Apple does not regard this behavior as a bug, but it's possible to work around it. See.
That URL should be...
https://stackoverflow.com/questions/38473610/os-x-findersync-fails-for-volumes/48936481#48936481