hlint tweaks

Did all sources except Remotes/* and Command/*

Upgrade/V0.hs

@@ -48,7 +48,7 @@ lookupFile0 = Upgrade.V1.lookupFile1
 getKeysPresent0 :: FilePath -> Annex [Key]
 getKeysPresent0 dir = do
 	exists <- liftIO $ doesDirectoryExist dir
-	if (not exists)
+	if not exists
 		then return []
 		else do
 			contents <- liftIO $ getDirectoryContents dir

Upgrade/V1.hs

@@ -94,7 +94,7 @@ updateSymlinks = do
 	showNote "updating symlinks..."
 	g <- Annex.gitRepo
 	files <- liftIO $ LsFiles.inRepo g [Git.workTree g]
-	forM_ files $ fixlink
+	forM_ files fixlink
 	where
 		fixlink f = do
 			r <- lookupFile1 f
@@ -119,7 +119,7 @@ moveLocationLogs = do
 				if exists
 					then do
 						contents <- liftIO $ getDirectoryContents dir
-						return $ catMaybes $ map oldlog2key contents
+						return $ mapMaybe oldlog2key contents
 					else return []
 			move (l, k) = do
 				g <- Annex.gitRepo
@@ -196,17 +196,14 @@ lookupFile1 file = do
 		Left _ -> return Nothing
 		Right l -> makekey l
 	where
-		getsymlink = do
-			l <- readSymbolicLink file
-			return $ takeFileName l
-		makekey l = do
-			case maybeLookupBackendName bname of
-				Nothing -> do
-					unless (null kname || null bname ||
-					        not (isLinkToAnnex l)) $
-						warning skip
-					return Nothing
-				Just backend -> return $ Just (k, backend)
+		getsymlink = return . takeFileName =<< readSymbolicLink file
+		makekey l = case maybeLookupBackendName bname of
+			Nothing -> do
+				unless (null kname || null bname ||
+				        not (isLinkToAnnex l)) $
+					warning skip
+				return Nothing
+			Just backend -> return $ Just (k, backend)
 			where
 				k = fileKey1 l
 				bname = keyBackendName k
@@ -221,7 +218,7 @@ getKeyFilesPresent1  = do
 getKeyFilesPresent1' :: FilePath -> Annex [FilePath]
 getKeyFilesPresent1' dir = do
 	exists <- liftIO $ doesDirectoryExist dir
-	if (not exists)
+	if not exists
 		then return []
 		else do
 			dirs <- liftIO $ getDirectoryContents dir

Upgrade/V2.hs

@@ -10,7 +10,7 @@ module Upgrade.V2 where
 import System.Directory
 import System.FilePath
 import Control.Monad.State (unless, when, liftIO)
-import List
+import Data.List
 import Data.Maybe
 
 import Types.Key
@@ -61,7 +61,7 @@ upgrade = do
 		Git.run g "rm" [Param "-r", Param "-f", Param "-q", File (olddir g)]
 		unless bare $ gitAttributesUnWrite g
 
-	unless bare $ push
+	unless bare push
 
 	return True
 
@@ -70,11 +70,11 @@ locationLogs repo = liftIO $ do
 	levela <- dirContents dir
 	levelb <- mapM tryDirContents levela
 	files <- mapM tryDirContents (concat levelb)
-	return $ catMaybes $ map islogfile (concat files)
+	return $ mapMaybe islogfile (concat files)
 	where
 		tryDirContents d = catch (dirContents d) (return . const [])
 		dir = gitStateDir repo
-		islogfile f = maybe Nothing (\k -> Just $ (k, f)) $
+		islogfile f = maybe Nothing (\k -> Just (k, f)) $
 				logFileKey $ takeFileName f
 
 inject :: FilePath -> FilePath -> Annex ()
@@ -131,10 +131,10 @@ gitAttributesUnWrite repo = do
 	whenM (doesFileExist attributes) $ do
 		c <- readFileStrict attributes
 		liftIO $ viaTmp writeFile attributes $ unlines $
-			filter (\l -> not $ l `elem` attrLines) $ lines c
+			filter (`notElem` attrLines) $ lines c
 		Git.run repo "add" [File attributes]
 
 stateDir :: FilePath
-stateDir = addTrailingPathSeparator $ ".git-annex"
+stateDir = addTrailingPathSeparator ".git-annex"
 gitStateDir :: Git.Repo -> FilePath
 gitStateDir repo = addTrailingPathSeparator $ Git.workTree repo </> stateDir