hlint

Annex/Branch.hs

@@ -189,7 +189,7 @@ change file a = lockJournal $ a <$> getStale file >>= set file
 
 {- Records new content of a file into the journal -}
 set :: FilePath -> String -> Annex ()
-set file content = setJournalFile file content
+set = setJournalFile
 
 {- Stages the journal, and commits staged changes to the branch. -}
 commit :: String -> Annex ()
@@ -197,7 +197,7 @@ commit message = whenM journalDirty $ lockJournal $ do
 	cleanjournal <- stageJournal
 	ref <- getBranch
 	withIndex $ commitBranch ref message [fullname]
-	liftIO $ cleanjournal
+	liftIO cleanjournal
 
 {- Commits the staged changes in the index to the branch.
  - 
@@ -355,7 +355,7 @@ stageJournal = withIndex $ do
 		Git.UpdateIndex.streamUpdateIndex g
 			[genstream dir h fs]
 		hashObjectStop h
-	return $ liftIO $ mapM_ removeFile $ map (dir </>) fs
+	return $ liftIO $ mapM_ (removeFile . (dir </>)) fs
   where
 	genstream dir h fs streamer = forM_ fs $ \file -> do
 		let path = dir </> file

Annex/Content/Direct.hs

@@ -139,11 +139,10 @@ sameFileStatus :: Key -> FileStatus -> Annex Bool
 sameFileStatus key status = do
 	old <- recordedInodeCache key
 	let curr = toInodeCache status
-	r <- case (old, curr) of
+	case (old, curr) of
 		(Just o, Just c) -> compareInodeCaches o c
 		(Nothing, Nothing) -> return True
 		_ -> return False
-	return r
 
 {- If the inodes have changed, only the size and mtime are compared. -}
 compareInodeCaches :: InodeCache -> InodeCache -> Annex Bool

Annex/Direct.hs

@@ -122,7 +122,7 @@ mergeDirectCleanup :: FilePath -> Git.Ref -> Git.Ref -> Annex ()
 mergeDirectCleanup d oldsha newsha = do
 	(items, cleanup) <- inRepo $ DiffTree.diffTreeRecursive oldsha newsha
 	forM_ items updated
-	void $ liftIO $ cleanup
+	void $ liftIO cleanup
 	liftIO $ removeDirectoryRecursive d
   where
 	updated item = do

Annex/FileMatcher.hs

@@ -47,7 +47,7 @@ parsedToMatcher parsed = case partitionEithers parsed of
 
 parseToken :: MkLimit -> GroupMap -> String -> Either String (Token MatchFiles)
 parseToken checkpresent groupmap t
-	| any (== t) Utility.Matcher.tokens = Right $ Utility.Matcher.token t
+	| t `elem` tokens = Right $ token t
 	| t == "present" = use checkpresent
 	| otherwise = maybe (Left $ "near " ++ show t) use $ M.lookup k $
 		M.fromList
@@ -61,7 +61,7 @@ parseToken checkpresent groupmap t
 			]
   where
 	(k, v) = separate (== '=') t
-	use a = Utility.Matcher.Operation <$> a v
+	use a = Operation <$> a v
 
 {- This is really dumb tokenization; there's no support for quoted values.
  - Open and close parens are always treated as standalone tokens;
@@ -76,7 +76,7 @@ tokenizeMatcher = filter (not . null ) . concatMap splitparens . words
 largeFilesMatcher :: Annex FileMatcher
 largeFilesMatcher = go =<< annexLargeFiles <$> Annex.getGitConfig
   where
-  	go Nothing = return $ matchAll
+  	go Nothing = return matchAll
 	go (Just expr) = do
 		m <- groupMap
 		u <- getUUID

Annex/Ssh.hs

@@ -79,7 +79,7 @@ sshCacheDir
 	gettmpdir = liftIO $ getEnv "GIT_ANNEX_TMP_DIR"
 	usetmpdir tmpdir = liftIO $ catchMaybeIO $ do
 		createDirectoryIfMissing True tmpdir
-		return $ tmpdir
+		return tmpdir
 
 portParams :: Maybe Integer -> [CommandParam]
 portParams Nothing = []

Assistant.hs

@@ -196,7 +196,8 @@ startDaemon assistant foreground startbrowser = do
 		| otherwise = "watch"
 	start daemonize webappwaiter = withThreadState $ \st -> do
 		checkCanWatch
-		when assistant $ checkEnvironment
+		when assistant
+			checkEnvironment
 		dstatus <- startDaemonStatus
 		logfile <- fromRepo gitAnnexLogFile
 		liftIO $ debugM desc $ "logging to " ++ logfile

Assistant/Types/NamedThread.hs

@@ -14,4 +14,4 @@ import Assistant.Types.ThreadName
 data NamedThread = NamedThread ThreadName (Assistant ())
 
 namedThread :: String -> Assistant () -> NamedThread
-namedThread name a = NamedThread (ThreadName name) a
+namedThread = NamedThread . ThreadName

Assistant/Types/NetMessager.hs

@@ -104,7 +104,7 @@ getSide side m = m side
 
 data NetMessager = NetMessager
 	-- outgoing messages
-	{ netMessages :: TChan (NetMessage)
+	{ netMessages :: TChan NetMessage
 	-- important messages for each client
 	, importantNetMessages :: TMVar (M.Map ClientID (S.Set NetMessage))
 	-- important messages that are believed to have been sent to a client

Backend.hs

@@ -94,8 +94,7 @@ lookupFile file = do
   where
 	makeret k = let bname = keyBackendName k in
 		case maybeLookupBackendName bname of
-			Just backend -> do
-				return $ Just (k, backend)
+			Just backend -> return $ Just (k, backend)
 			Nothing -> do
 				warning $
 					"skipping " ++ file ++

Creds.hs

@@ -92,7 +92,7 @@ getRemoteCredPair c storage = maybe fromcache (return . Just) =<< fromenv
 		Just credpair -> do
 			writeCacheCredPair credpair storage
 			return $ Just credpair
-		_ -> do error $ "bad creds"
+		_ -> error "bad creds"
 
 {- Gets a CredPair from the environment. -}
 getEnvCredPair :: CredPairStorage -> IO (Maybe CredPair)

Crypto.hs

@@ -100,7 +100,7 @@ encryptCipher :: Cipher -> KeyIds -> IO StorableCipher
 encryptCipher (Cipher c) (KeyIds ks) = do
 	-- gpg complains about duplicate recipient keyids
 	let ks' = nub $ sort ks
-	encipher <- Gpg.pipeStrict ([ Params "--encrypt" ] ++ recipients ks') c
+	encipher <- Gpg.pipeStrict (Params "--encrypt" : recipients ks') c
 	return $ EncryptedCipher encipher (KeyIds ks')
   where
 	recipients l = force_recipients :

Init.hs

@@ -33,7 +33,7 @@ import Backend
 genDescription :: Maybe String -> Annex String
 genDescription (Just d) = return d
 genDescription Nothing = do
-	hostname <- maybe "" id <$> liftIO getHostname
+	hostname <- fromMaybe "" <$> liftIO getHostname
 	let at = if null hostname then "" else "@"
 	username <- liftIO myUserName
 	reldir <- liftIO . relHome =<< fromRepo Git.repoPath
@@ -132,7 +132,7 @@ probeCrippledFileSystem = do
 		return True
 
 checkCrippledFileSystem :: Annex ()
-checkCrippledFileSystem = whenM (probeCrippledFileSystem) $ do
+checkCrippledFileSystem = whenM probeCrippledFileSystem $ do
 	warning "Detected a crippled filesystem."
 	setCrippledFileSystem True
 	unlessM isDirect $ do

Limit.hs

@@ -5,7 +5,7 @@
  - Licensed under the GNU GPL version 3 or higher.
  -}
 
-{-# LANGUAGE PackageImports, CPP #-}
+{-# LANGUAGE CPP #-}
 
 module Limit where
 
@@ -128,7 +128,7 @@ limitIn name = Right $ \notpresent -> check $
 limitPresent :: Maybe UUID -> MkLimit
 limitPresent u _ = Right $ const $ check $ \key -> do
 	hereu <- getUUID
-	if u == Just hereu || u == Nothing
+	if u == Just hereu || isNothing u
 		then inAnnex key
 		else do
 			us <- Remote.keyLocations key

Logs/Group.hs

@@ -66,11 +66,11 @@ makeGroupMap :: M.Map UUID (S.Set Group) -> GroupMap
 makeGroupMap byuuid = GroupMap byuuid bygroup
   where
 	bygroup = M.fromListWith S.union $
-		concat $ map explode $ M.toList byuuid
+		concatMap explode $ M.toList byuuid
 	explode (u, s) = map (\g -> (g, S.singleton u)) (S.toList s)
 
 {- If a repository is in exactly one standard group, returns it. -}
 getStandardGroup :: S.Set Group -> Maybe StandardGroup
-getStandardGroup s = case catMaybes $ map toStandardGroup $ S.toList s of
+getStandardGroup s = case mapMaybe toStandardGroup $ S.toList s of
 	[g] -> Just g
 	_ -> Nothing

Logs/Remote.hs

@@ -93,7 +93,7 @@ prop_idempotent_configEscape s = s == (configUnEscape . configEscape) s
 prop_parse_show_Config :: RemoteConfig -> Bool
 prop_parse_show_Config c
 	-- whitespace and '=' are not supported in keys
-	| any (\k -> any isSpace k || any (== '=') k) (M.keys c) = True
+	| any (\k -> any isSpace k || elem '=' k) (M.keys c) = True
 	| otherwise = parseConfig (showConfig c) ~~ Just c
   where
 	normalize v = sort . M.toList <$> v

Logs/Transfer.hs

@@ -130,8 +130,8 @@ runTransfer t file shouldretry a = do
 			Just fd -> do
 				locked <- catchMaybeIO $
 					setLock fd (WriteLock, AbsoluteSeek, 0, 0)
-				when (locked == Nothing) $
-					error $ "transfer already in progress"
+				when (isNothing locked) $
+					error "transfer already in progress"
 				void $ tryIO $ writeTransferInfoFile info tfile
 				return mfd
 	cleanup _ Nothing = noop
@@ -169,7 +169,7 @@ mkProgressUpdater t info = do
   where
 	updater tfile mvar b = modifyMVar_ mvar $ \oldbytes -> do
 		let newbytes = fromBytesProcessed b
-		if (newbytes - oldbytes >= mindelta)
+		if newbytes - oldbytes >= mindelta
 			then do
 				let info' = info { bytesComplete = Just newbytes }
 				_ <- tryIO $ writeTransferInfoFile info' tfile
@@ -213,7 +213,7 @@ checkTransfer t = do
 {- Gets all currently running transfers. -}
 getTransfers :: Annex [(Transfer, TransferInfo)]
 getTransfers = do
-	transfers <- catMaybes . map parseTransferFile . concat <$> findfiles
+	transfers <- mapMaybe parseTransferFile . concat <$> findfiles
 	infos <- mapM checkTransfer transfers
 	return $ map (\(t, Just i) -> (t, i)) $
 		filter running $ zip transfers infos
@@ -265,7 +265,7 @@ transferLockFile infofile = let (d,f) = splitFileName infofile in
 {- Parses a transfer information filename to a Transfer. -}
 parseTransferFile :: FilePath -> Maybe Transfer
 parseTransferFile file
-	| "lck." `isPrefixOf` (takeFileName file) = Nothing
+	| "lck." `isPrefixOf` takeFileName file = Nothing
 	| otherwise = case drop (length bits - 3) bits of
 		[direction, u, key] -> Transfer
 			<$> readLcDirection direction
@@ -291,17 +291,17 @@ writeTransferInfoFile info tfile = do
 writeTransferInfo :: TransferInfo -> String
 writeTransferInfo info = unlines
 	[ (maybe "" show $ startedTime info) ++
-	  (maybe "" (\b -> " " ++ show b) $ bytesComplete info)
+	  (maybe "" (\b -> ' ' : show b) (bytesComplete info))
 	, fromMaybe "" $ associatedFile info -- comes last; arbitrary content
 	]
 
-readTransferInfoFile :: (Maybe ProcessID) -> FilePath -> IO (Maybe TransferInfo)
+readTransferInfoFile :: Maybe ProcessID -> FilePath -> IO (Maybe TransferInfo)
 readTransferInfoFile mpid tfile = catchDefaultIO Nothing $ do
 	h <- openFile tfile ReadMode
 	fileEncoding h
 	hClose h `after` (readTransferInfo mpid <$> hGetContentsStrict h)
 
-readTransferInfo :: (Maybe ProcessID) -> String -> Maybe TransferInfo
+readTransferInfo :: Maybe ProcessID -> String -> Maybe TransferInfo
 readTransferInfo mpid s = TransferInfo
 	<$> time
 	<*> pure mpid
@@ -353,8 +353,8 @@ instance Arbitrary TransferInfo where
 
 prop_read_write_transferinfo :: TransferInfo -> Bool
 prop_read_write_transferinfo info
-	| transferRemote info /= Nothing = True -- remote not stored
-	| transferTid info /= Nothing = True -- tid not stored
+	| isJust (transferRemote info) = True -- remote not stored
+	| isJust (transferTid info) = True -- tid not stored
 	| otherwise = Just (info { transferPaused = False }) == info'
   where
 	info' = readTransferInfo (transferPid info) (writeTransferInfo info)

Logs/Trust.hs

@@ -70,7 +70,7 @@ trustPartition level ls
 		return $ partition (`elem` candidates) ls
 
 {- Filters UUIDs to those not matching a TrustLevel. -}
-trustExclude :: TrustLevel -> [UUID] -> Annex ([UUID])
+trustExclude :: TrustLevel -> [UUID] -> Annex [UUID]
 trustExclude level ls = snd <$> trustPartition level ls
 
 {- trustLog in a map, overridden with any values from forcetrust or

Logs/Unused.hs

@@ -31,7 +31,7 @@ readUnusedLog :: FilePath -> Annex UnusedMap
 readUnusedLog prefix = do
 	f <- fromRepo $ gitAnnexUnusedLog prefix
 	ifM (liftIO $ doesFileExist f)
-		( M.fromList . catMaybes . map parse . lines
+		( M.fromList . mapMaybe parse . lines
 			<$> liftIO (readFile f)
 		, return M.empty
 		)

Messages.hs

@@ -71,7 +71,7 @@ showProgress = handle q $
 
 {- Shows a progress meter while performing a transfer of a key.
  - The action is passed a callback to use to update the meter. -}
-metered :: (Maybe MeterUpdate) -> Key -> (MeterUpdate -> Annex a) -> Annex a
+metered :: Maybe MeterUpdate -> Key -> (MeterUpdate -> Annex a) -> Annex a
 metered combinemeterupdate key a = go (keySize key)
   where
 	go (Just size) = meteredBytes combinemeterupdate size a
@@ -79,7 +79,7 @@ metered combinemeterupdate key a = go (keySize key)
 
 {- Shows a progress meter while performing an action on a given number
  - of bytes. -}
-meteredBytes :: (Maybe MeterUpdate) -> Integer -> (MeterUpdate -> Annex a) -> Annex a
+meteredBytes :: Maybe MeterUpdate -> Integer -> (MeterUpdate -> Annex a) -> Annex a
 meteredBytes combinemeterupdate size a = withOutputType go
   where
 	go NormalOutput = do

Messages/JSON.hs

@@ -34,7 +34,4 @@ add :: JSON a => [(String, a)] -> IO ()
 add v = putStr $ Stream.add v
 
 complete :: JSON a => [(String, a)] -> IO ()
-complete v = putStr $ concat
-	[ Stream.start v
-	, Stream.end
-	]
+complete v = putStr $ Stream.start v ++ Stream.end

Remote.hs

@@ -150,7 +150,7 @@ prettyListUUIDs :: [UUID] -> Annex [String]
 prettyListUUIDs uuids = do
 	hereu <- getUUID
 	m <- uuidDescriptions
-	return $ map (\u -> prettify m hereu u) uuids
+	return $ map (prettify m hereu) uuids
   where
 	finddescription m u = M.findWithDefault "" u m
 	prettify m hereu u

Remote/Rsync.hs

@@ -127,7 +127,7 @@ retrieveCheap :: RsyncOpts -> Key -> FilePath -> Annex Bool
 retrieveCheap o k f = ifM (preseedTmp k f) ( retrieve o k undefined f , return False )
 
 retrieveEncrypted :: RsyncOpts -> (Cipher, Key) -> Key -> FilePath -> Annex Bool
-retrieveEncrypted o (cipher, enck) _ f = withTmp enck $ \tmp -> do
+retrieveEncrypted o (cipher, enck) _ f = withTmp enck $ \tmp ->
 	ifM (retrieve o enck undefined tmp)
 		( liftIO $ catchBoolIO $ do
 			decrypt cipher (feedFile tmp) $

Seek.hs

@@ -28,7 +28,7 @@ seekHelper a params = do
 		runSegmentPaths (\fs -> Git.Command.leaveZombie <$> a fs g) params
 	{- Show warnings only for files/directories that do not exist. -}
 	forM_ (map fst $ filter (null . snd) $ zip params ll) $ \p ->
-		unlessM (isJust <$> (liftIO $ catchMaybeIO $ getSymbolicLinkStatus p)) $
+		unlessM (isJust <$> liftIO (catchMaybeIO $ getSymbolicLinkStatus p)) $
 			fileNotFound p
 	return $ concat ll
 

Test.hs

@@ -72,7 +72,7 @@ main = do
 	divider
 	propigate rs qcok
   where
-	divider = putStrLn $ take 70 $ repeat '-'
+	divider = putStrLn $ replicate 70 '-'
 
 propigate :: [Counts] -> Bool -> IO ()
 propigate cs qcok

Types/GitConfig.hs

@@ -122,8 +122,8 @@ extractRemoteGitConfig r remotename = RemoteGitConfig
 	getbool k def = fromMaybe def $ getmaybebool k
 	getmaybebool k = Git.Config.isTrue =<< getmaybe k
 	getmayberead k = readish =<< getmaybe k
-	getmaybe k = maybe (Git.Config.getMaybe (key k) r) Just $
-		Git.Config.getMaybe (remotekey k) r
+	getmaybe k = mplus (Git.Config.getMaybe (key k) r)
+		(Git.Config.getMaybe (remotekey k) r)
 	getoptions k = fromMaybe [] $ words <$> getmaybe k
 
 	key k = "annex." ++ k

Types/StandardGroups.hs

@@ -57,17 +57,17 @@ descStandardGroup UnwantedGroup = "unwanted: remove content from this repository
 preferredContent :: StandardGroup -> String
 preferredContent ClientGroup = lastResort
 	"exclude=*/archive/* and exclude=archive/*"
-preferredContent TransferGroup = lastResort $
+preferredContent TransferGroup = lastResort
 	"not (inallgroup=client and copies=client:2) and " ++ preferredContent ClientGroup
 preferredContent BackupGroup = "include=*"
-preferredContent IncrementalBackupGroup = lastResort $
+preferredContent IncrementalBackupGroup = lastResort
 	"include=* and (not copies=incrementalbackup:1)"
 preferredContent SmallArchiveGroup = lastResort $
 	"(include=*/archive/* or include=archive/*) and " ++ preferredContent FullArchiveGroup
-preferredContent FullArchiveGroup = lastResort $
+preferredContent FullArchiveGroup = lastResort
 	"not (copies=archive:1 or copies=smallarchive:1)"
 preferredContent SourceGroup = "not (copies=1)"
-preferredContent ManualGroup = lastResort $
+preferredContent ManualGroup = lastResort
 	"present and exclude=*/archive/* and exclude=archive/*"
 preferredContent UnwantedGroup = "exclude=*"