add remotes slot to Annex

This required parameterizing the type for Remote, to avoid a cycle.

RemoteClass.hs

@@ -9,38 +9,36 @@ module RemoteClass where
 
 import Control.Exception
 
-import Annex
-import UUID
 import Key
 
-data Remote = Remote {
+data Remote a = Remote {
 	-- each Remote has a unique uuid
-	uuid :: UUID,
+	uuid :: String,
 	-- each Remote has a human visible name
 	name :: String,
 	-- Remotes have a use cost; higher is more expensive
 	cost :: Int,
 	-- Transfers a key to the remote.
-	storeKey :: Key -> Annex Bool,
+	storeKey :: Key -> a Bool,
 	-- retrieves a key's contents to a file
-	retrieveKeyFile :: Key -> FilePath -> Annex Bool,
+	retrieveKeyFile :: Key -> FilePath -> a Bool,
 	-- removes a key's contents
-	removeKey :: Key -> Annex Bool,
+	removeKey :: Key -> a Bool,
 	-- Checks if a key is present in the remote; if the remote
 	-- cannot be accessed returns a Left error.
-	hasKey :: Key -> Annex (Either IOException Bool),
+	hasKey :: Key -> a (Either IOException Bool),
 	-- Some remotes can check hasKey without an expensive network
 	-- operation.
 	hasKeyCheap :: Bool
 }
 
-instance Show Remote where
+instance Show (Remote a) where
 	show remote = "Remote { uuid =\"" ++ uuid remote ++ "\" }"
 
 -- two remotes are the same if they have the same uuid
-instance Eq Remote where
-	a == b = uuid a == uuid b
+instance Eq (Remote a) where
+	x == y = uuid x == uuid y
 
 -- order remotes by cost
-instance Ord Remote where
-	compare a b = compare (cost a) (cost b)
+instance Ord (Remote a) where
+	compare x y = compare (cost x) (cost y)