Feature Request: Add option --one-file-system (don't cross filesystem boundaries) in reverse mode

[slackner]

Thank you for your continous effort to maintain gocryptfs!

I'm still mostly using gocryptfs in reverse mode for backup purposes, and I'm glad to see that support for backing up files from multiple filesystems has been improved with 518771e and follow-up commits.

In some cases, however, I would actually prefer to just backup a single file system. If I would be using rsync directly, I could use the

 -x, --one-file-system       don't cross filesystem boundaries

switch. With gocryptfs, however, information about the source filesystem is lost and I have to manually exclude file systems based on the path that I do not want to backup. Is there maybe a chance to get a similar --one-file-system switch (for reverse mode) that just does not follow any other devices? It would not matter if the directory itself is preversed or not (I think rsync preserves the directory, it is just empty afterwards).

[rfjakob]

Yes, I also thought that this could be useful.