git-annex/Types/Backend.hs

27 lines
673 B
Haskell

{- git-annex key/value backend data type
-
- Most things should not need this, using Types instead
-
- Copyright 2010,2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Types.Backend where
import Types.Key
import Types.KeySource
data BackendA a = Backend
{ name :: String
, getKey :: KeySource -> a (Maybe Key)
, fsckKey :: Maybe (Key -> FilePath -> a Bool)
, canUpgradeKey :: Maybe (Key -> Bool)
, fastMigrate :: Maybe (Key -> BackendA a -> Maybe Key)
}
instance Show (BackendA a) where
show backend = "Backend { name =\"" ++ name backend ++ "\" }"
instance Eq (BackendA a) where
a == b = name a == name b