git-annex/Types/Backend.hs
2011-12-31 04:14:33 -04:00

27 lines
619 B
Haskell

{- git-annex key/value backend data type
-
- Most things should not need this, using Types instead
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Types.Backend where
import Types.Key
data BackendA a = Backend {
-- name of this backend
name :: String,
-- converts a filename to a key
getKey :: FilePath -> a (Maybe Key),
-- called during fsck to check a key
fsckKey :: Key -> a Bool
}
instance Show (BackendA a) where
show backend = "Backend { name =\"" ++ name backend ++ "\" }"
instance Eq (BackendA a) where
a == b = name a == name b