From Lars Kruse:

Thus the situation seems to be that obnam stores all relevant chunks, but due to the symlink pointing to something outside of the repository I cannot restore

From liw: This is obviously a bug. Obnam should either give an error if the backup root is a symlink, or back it up as a symlink, not recurse into the directory and then backup that and only then ruin everything by backing up the symlink as a symlink.

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This should now be fixed to give an error message when you backup. I can't currently give access to the hidden files easily, I'm afraid, but if you change your backup root to be the directory pointed at by the symlink, and run a backup, it should go fairly fast and give you access to your files.

Later, I may consider allowing the root to be a symlink to a directory, but that'll require bigger changes than this error message, I'm afraid. Patches to implement this would be welcome.

done --liw