noop

Command/Fsck.hs

@@ -85,7 +85,7 @@ performRemote key file backend numcopies remote =
 			t <- fromRepo gitAnnexTmpDir
 			let tmp = t </> "fsck" ++ show pid ++ "." ++ keyFile key
 			liftIO $ createDirectoryIfMissing True t
-			let cleanup = liftIO $ catchIO (removeFile tmp) (const $ return ())
+			let cleanup = liftIO $ catchIO (removeFile tmp) (const noop)
 			cleanup
 			cleanup `after` a tmp
 		getfile tmp =

Command/Status.hs

@@ -108,12 +108,11 @@ nojson :: StatState String -> String -> StatState String
 nojson a _ = a
 
 showStat :: Stat -> StatState ()
-showStat s = calc =<< s
+showStat s = maybe noop calc =<< s
 	where
-		calc (Just (desc, a)) = do
+		calc (desc, a) = do
 			(lift . showHeader) desc
 			lift . showRaw =<< a
-		calc Nothing = return ()
 
 supported_backends :: Stat
 supported_backends = stat "supported backends" $ json unwords $

Command/Unused.hs

@@ -268,7 +268,7 @@ withKeysReferencedInGitRef a ref = do
 	showAction $ "checking " ++ Git.Ref.describe ref
 	go =<< inRepo (LsTree.lsTree ref)
 	where
-		go [] = return ()
+		go [] = noop
 		go (l:ls)
 			| isSymLink (LsTree.mode l) = do
 				content <- L.decodeUtf8 <$> catFile ref (LsTree.file l)

Command/Whereis.hs

@@ -46,9 +46,9 @@ perform remotemap key = do
 		untrustedheader = "The following untrusted locations may also have copies:\n"
 
 performRemote :: Key -> Remote -> Annex () 
-performRemote key remote = case whereisKey remote of
-	Nothing -> return ()
-	Just a -> do
-		ls <- a key
-		unless (null ls) $ showLongNote $
-			unlines $ map (\l -> name remote ++ ": " ++ l) ls
+performRemote key remote = maybe noop go $ whereisKey remote
+	where
+		go a = do
+			ls <- a key
+			unless (null ls) $ showLongNote $ unlines $
+				map (\l -> name remote ++ ": " ++ l) ls