replace (Key, Backend) with Key

Only fsck and reinject and the test suite used the Backend, and they can
look it up as needed from the Key. This simplifies the code and also speeds
it up.

There is a small behavior change here. Before, all commands would warn when
acting on an annexed file with an unknown backend. Now, only fsck and
reinject show that warning.

1 files changed, 10 insertions, 6 deletions

diff --git a/Command/Fsck.hs b/Command/Fsck.hs
index 88a9915c4..a17662d62 100644
--- a/Command/Fsck.hs
+++ b/Command/Fsck.hs
@@ -104,12 +104,16 @@ getIncremental = do
 						resetStartTime
 		return True
 
-start :: Maybe Remote -> Incremental -> FilePath -> (Key, Backend) -> CommandStart
-start from inc file (key, backend) = do
-	numcopies <- getFileNumCopies file
-	case from of
-		Nothing -> go $ perform key file backend numcopies
-		Just r -> go $ performRemote key file backend numcopies r
+start :: Maybe Remote -> Incremental -> FilePath -> Key -> CommandStart
+start from inc file key = do
+	v <- Backend.getBackend file key
+	case v of
+		Nothing -> stop
+		Just backend -> do
+			numcopies <- getFileNumCopies file
+			case from of
+				Nothing -> go $ perform key file backend numcopies
+				Just r -> go $ performRemote key file backend numcopies r
   where
 	go = runFsck inc file key