pub fn read_registration(root: &Path) -> Result<Option<RegistrationFile>>Expand description
The registration for root, or None when nothing published one.
Only absence means “nothing is published”. A file that exists at this tree’s
own digest but is not a registration is io::ErrorKind::InvalidData with
the path in the message, because a reader that got this far has to know it
could not be read rather than treat a broken endpoint as an absent one.