finished where indentation changes

Git/AutoCorrect.hs

@@ -33,11 +33,11 @@ similarityFloor = 7
 fuzzymatches :: String -> (c -> String) -> [c] -> [c]
 fuzzymatches input showchoice choices = fst $ unzip $
 	sortBy comparecost $ filter similarEnough $ zip choices costs
-        where
-                distance = restrictedDamerauLevenshteinDistance gitEditCosts input
-                costs = map (distance . showchoice) choices
-                comparecost a b = compare (snd a) (snd b)
-                similarEnough (_, cst) = cst < similarityFloor
+  where
+	distance = restrictedDamerauLevenshteinDistance gitEditCosts input
+	costs = map (distance . showchoice) choices
+	comparecost a b = compare (snd a) (snd b)
+	similarEnough (_, cst) = cst < similarityFloor
 
 {- Takes action based on git's autocorrect configuration, in preparation for
  - an autocorrected command being run. -}
@@ -49,23 +49,23 @@ prepare input showmatch matches r =
 			| n < 0 -> warn
 			| otherwise -> sleep n
 		Nothing -> list
-	where
-		list = error $ unlines $
-			[ "Unknown command '" ++ input ++ "'"
-			, ""
-			, "Did you mean one of these?"
-			] ++ map (\m -> "\t" ++ showmatch m) matches
-		warn = 
-			hPutStr stderr $ unlines
-				[ "WARNING: You called a command named '" ++
-				  input ++ "', which does not exist."
-				, "Continuing under the assumption that you meant '" ++
-				  showmatch (Prelude.head matches) ++ "'"
-				]
-		sleep n = do
-			warn
-			hPutStrLn stderr $ unwords
-				[ "in"
-				, show (fromIntegral n / 10 :: Float)
-				, "seconds automatically..."]
-			threadDelay (n * 100000) -- deciseconds to microseconds
+  where
+	list = error $ unlines $
+		[ "Unknown command '" ++ input ++ "'"
+		, ""
+		, "Did you mean one of these?"
+		] ++ map (\m -> "\t" ++ showmatch m) matches
+	warn = 
+		hPutStr stderr $ unlines
+			[ "WARNING: You called a command named '" ++
+			  input ++ "', which does not exist."
+			, "Continuing under the assumption that you meant '" ++
+			  showmatch (Prelude.head matches) ++ "'"
+			]
+	sleep n = do
+		warn
+		hPutStrLn stderr $ unwords
+			[ "in"
+			, show (fromIntegral n / 10 :: Float)
+			, "seconds automatically..."]
+		threadDelay (n * 100000) -- deciseconds to microseconds

Git/Branch.hs

@@ -36,10 +36,10 @@ current r = do
 currentUnsafe :: Repo -> IO (Maybe Git.Ref)
 currentUnsafe r = parse . firstLine
 	<$> pipeReadStrict [Param "symbolic-ref", Param "HEAD"] r
-	where
-		parse l
-			| null l = Nothing
-			| otherwise = Just $ Git.Ref l
+  where
+	parse l
+		| null l = Nothing
+		| otherwise = Just $ Git.Ref l
 
 {- Checks if the second branch has any commits not present on the first
  - branch. -}
@@ -47,12 +47,12 @@ changed :: Branch -> Branch -> Repo -> IO Bool
 changed origbranch newbranch repo
 	| origbranch == newbranch = return False
 	| otherwise = not . null <$> diffs
-	where
-		diffs = pipeReadStrict
-			[ Param "log"
-			, Param (show origbranch ++ ".." ++ show newbranch)
-			, Params "--oneline -n1"
-			] repo
+  where
+	diffs = pipeReadStrict
+		[ Param "log"
+		, Param (show origbranch ++ ".." ++ show newbranch)
+		, Params "--oneline -n1"
+		] repo
 
 {- Given a set of refs that are all known to have commits not
  - on the branch, tries to update the branch by a fast-forward.
@@ -70,23 +70,23 @@ fastForward branch (first:rest) repo =
 		( no_ff
 		, maybe no_ff do_ff =<< findbest first rest
 		)
-	where
-		no_ff = return False
-		do_ff to = do
-			run "update-ref"
-				[Param $ show branch, Param $ show to] repo
-			return True
-		findbest c [] = return $ Just c
-		findbest c (r:rs)
-			| c == r = findbest c rs
-			| otherwise = do
-			better <- changed c r repo
-			worse <- changed r c repo
-			case (better, worse) of
-				(True, True) -> return Nothing -- divergent fail
-				(True, False) -> findbest r rs -- better
-				(False, True) -> findbest c rs -- worse
-				(False, False) -> findbest c rs -- same
+  where
+	no_ff = return False
+	do_ff to = do
+		run "update-ref"
+			[Param $ show branch, Param $ show to] repo
+		return True
+	findbest c [] = return $ Just c
+	findbest c (r:rs)
+		| c == r = findbest c rs
+		| otherwise = do
+		better <- changed c r repo
+		worse <- changed r c repo
+		case (better, worse) of
+			(True, True) -> return Nothing -- divergent fail
+			(True, False) -> findbest r rs -- better
+			(False, True) -> findbest c rs -- worse
+			(False, False) -> findbest c rs -- same
 
 {- Commits the index into the specified branch (or other ref), 
  - with the specified parent refs, and returns the committed sha -}
@@ -99,5 +99,5 @@ commit message branch parentrefs repo = do
 		message repo
 	run "update-ref" [Param $ show branch, Param $ show sha] repo
 	return sha
-	where
-		ps = concatMap (\r -> ["-p", show r]) parentrefs
+  where
+	ps = concatMap (\r -> ["-p", show r]) parentrefs

Git/CatFile.hs

@@ -48,28 +48,28 @@ catObject h object = maybe L.empty fst <$> catObjectDetails h object
 {- Gets both the content of an object, and its Sha. -}
 catObjectDetails :: CatFileHandle -> Ref -> IO (Maybe (L.ByteString, Sha))
 catObjectDetails h object = CoProcess.query h send receive
-	where
-		send to = do
-			fileEncoding to
-			hPutStrLn to $ show object
-		receive from = do
-			fileEncoding from
-			header <- hGetLine from
-			case words header of
-				[sha, objtype, size]
-					| length sha == shaSize &&
-					  isJust (readObjectType objtype) -> 
-						case reads size of
-							[(bytes, "")] -> readcontent bytes from sha
-							_ -> dne
-					| otherwise -> dne
-				_
-					| header == show object ++ " missing" -> dne
-					| otherwise -> error $ "unknown response from git cat-file " ++ show (header, object)
-		readcontent bytes from sha = do
-			content <- S.hGet from bytes
-			c <- hGetChar from
-			when (c /= '\n') $
-				error "missing newline from git cat-file"
-			return $ Just (L.fromChunks [content], Ref sha)
-		dne = return Nothing
+  where
+	send to = do
+		fileEncoding to
+		hPutStrLn to $ show object
+	receive from = do
+		fileEncoding from
+		header <- hGetLine from
+		case words header of
+			[sha, objtype, size]
+				| length sha == shaSize &&
+				  isJust (readObjectType objtype) -> 
+					case reads size of
+						[(bytes, "")] -> readcontent bytes from sha
+						_ -> dne
+				| otherwise -> dne
+			_
+				| header == show object ++ " missing" -> dne
+				| otherwise -> error $ "unknown response from git cat-file " ++ show (header, object)
+	readcontent bytes from sha = do
+		content <- S.hGet from bytes
+		c <- hGetChar from
+		when (c /= '\n') $
+			error "missing newline from git cat-file"
+		return $ Just (L.fromChunks [content], Ref sha)
+	dne = return Nothing

Git/CheckAttr.hs

@@ -24,12 +24,12 @@ checkAttrStart attrs repo = do
 	cwd <- getCurrentDirectory
 	h <- gitCoProcessStart params repo
 	return (h, attrs, cwd)
-	where
-		params =
-			[ Param "check-attr" 
-			, Params "-z --stdin"
-			] ++ map Param attrs ++
-			[ Param "--" ]
+  where
+	params =
+		[ Param "check-attr" 
+		, Params "-z --stdin"
+		] ++ map Param attrs ++
+		[ Param "--" ]
 
 checkAttrStop :: CheckAttrHandle -> IO ()
 checkAttrStop (h, _, _) = CoProcess.stop h
@@ -42,26 +42,26 @@ checkAttr (h, attrs, cwd) want file = do
 	case vals of
 		[v] -> return v
 		_ -> error $ "unable to determine " ++ want ++ " attribute of " ++ file
-	where
-		send to = do
-			fileEncoding to
-			hPutStr to $ file' ++ "\0"
-		receive from = forM attrs $ \attr -> do
-			fileEncoding from
-			l <- hGetLine from
-			return (attr, attrvalue attr l)
-		{- Before git 1.7.7, git check-attr worked best with
-		 - absolute filenames; using them worked around some bugs
-		 - with relative filenames.
-		 - 
-		 - With newer git, git check-attr chokes on some absolute
-		 - filenames, and the bugs that necessitated them were fixed,
-		 - so use relative filenames. -}
-		oldgit = Git.Version.older "1.7.7"
-		file'
-			| oldgit = absPathFrom cwd file
-			| otherwise = relPathDirToFile cwd $ absPathFrom cwd file
-		attrvalue attr l = end bits !! 0
-			where
-				bits = split sep l
-				sep = ": " ++ attr ++ ": "
+  where
+	send to = do
+		fileEncoding to
+		hPutStr to $ file' ++ "\0"
+	receive from = forM attrs $ \attr -> do
+		fileEncoding from
+		l <- hGetLine from
+		return (attr, attrvalue attr l)
+	{- Before git 1.7.7, git check-attr worked best with
+	 - absolute filenames; using them worked around some bugs
+	 - with relative filenames.
+	 - 
+	 - With newer git, git check-attr chokes on some absolute
+	 - filenames, and the bugs that necessitated them were fixed,
+	 - so use relative filenames. -}
+	oldgit = Git.Version.older "1.7.7"
+	file'
+		| oldgit = absPathFrom cwd file
+		| otherwise = relPathDirToFile cwd $ absPathFrom cwd file
+	attrvalue attr l = end bits !! 0
+	  where
+		bits = split sep l
+		sep = ": " ++ attr ++ ": "

Git/Command.hs

@@ -17,11 +17,11 @@ import qualified Utility.CoProcess as CoProcess
 {- Constructs a git command line operating on the specified repo. -}
 gitCommandLine :: [CommandParam] -> Repo -> [CommandParam]
 gitCommandLine params Repo { location = l@(Local _ _ ) } = setdir : settree ++ params
-	where
-		setdir = Param $ "--git-dir=" ++ gitdir l
-		settree = case worktree l of
-			Nothing -> []
-			Just t -> [Param $ "--work-tree=" ++ t]
+  where
+	setdir = Param $ "--git-dir=" ++ gitdir l
+	settree = case worktree l of
+		Nothing -> []
+		Just t -> [Param $ "--work-tree=" ++ t]
 gitCommandLine _ repo = assertLocal repo $ error "internal"
 
 {- Runs git in the specified repo. -}
@@ -49,8 +49,8 @@ pipeReadLazy params repo = assertLocal repo $ do
 	fileEncoding h
 	c <- hGetContents h
 	return (c, checkSuccessProcess pid)
-	where
-		p  = gitCreateProcess params repo
+  where
+	p  = gitCreateProcess params repo
 
 {- Runs a git subcommand, and returns its output, strictly.
  -
@@ -63,8 +63,8 @@ pipeReadStrict params repo = assertLocal repo $
 		output <- hGetContentsStrict h
 		hClose h
 		return output
-	where
-		p  = gitCreateProcess params repo
+  where
+	p  = gitCreateProcess params repo
 
 {- Runs a git subcommand, feeding it input, and returning its output,
  - which is expected to be fairly small, since it's all read into memory
@@ -85,8 +85,8 @@ pipeNullSplit :: [CommandParam] -> Repo -> IO ([String], IO Bool)
 pipeNullSplit params repo = do
 	(s, cleanup) <- pipeReadLazy params repo
 	return (filter (not . null) $ split sep s, cleanup)
-	where
-		sep = "\0"
+  where
+	sep = "\0"
 
 
 pipeNullSplitZombie :: [CommandParam] -> Repo -> IO [String]

Git/Config.hs

@@ -48,18 +48,18 @@ reRead r = read' $ r
  -}
 read' :: Repo -> IO Repo
 read' repo = go repo
-	where
-		go Repo { location = Local { gitdir = d } } = git_config d
-		go Repo { location = LocalUnknown d } = git_config d
-		go _ = assertLocal repo $ error "internal"
-		git_config d = withHandle StdoutHandle createProcessSuccess p $
-			hRead repo
-			where
-				params = ["config", "--null", "--list"]
-				p = (proc "git" params)
-					{ cwd = Just d
-					, env = gitEnv repo
-					}
+  where
+	go Repo { location = Local { gitdir = d } } = git_config d
+	go Repo { location = LocalUnknown d } = git_config d
+	go _ = assertLocal repo $ error "internal"
+	git_config d = withHandle StdoutHandle createProcessSuccess p $
+		hRead repo
+	  where
+		params = ["config", "--null", "--list"]
+		p = (proc "git" params)
+			{ cwd = Just d
+			, env = gitEnv repo
+			}
 
 {- Gets the global git config, returning a dummy Repo containing it. -}
 global :: IO (Maybe Repo)
@@ -73,9 +73,9 @@ global = do
 			return $ Just repo'
 		, return Nothing
 		)
-	where
-		params = ["config", "--null", "--list", "--global"]
-		p = (proc "git" params)
+  where
+	params = ["config", "--null", "--list", "--global"]
+	p = (proc "git" params)
 
 {- Reads git config from a handle and populates a repo with it. -}
 hRead :: Repo -> Handle -> IO Repo
@@ -133,10 +133,10 @@ parse s
 	| all ('=' `elem`) (take 1 ls) = sep '=' ls
 	-- --null --list output separates keys from values with newlines
 	| otherwise = sep '\n' $ split "\0" s
-	where
-		ls = lines s
-		sep c = M.fromListWith (++) . map (\(k,v) -> (k, [v])) .
-			map (separate (== c))
+  where
+	ls = lines s
+	sep c = M.fromListWith (++) . map (\(k,v) -> (k, [v])) .
+		map (separate (== c))
 
 {- Checks if a string from git config is a true value. -}
 isTrue :: String -> Maybe Bool
@@ -144,8 +144,8 @@ isTrue s
 	| s' == "true" = Just True
 	| s' == "false" = Just False
 	| otherwise = Nothing
-	where
-		s' = map toLower s
+  where
+	s' = map toLower s
 
 isBare :: Repo -> Bool
 isBare r = fromMaybe False $ isTrue =<< getMaybe "core.bare" r

Git/Construct.hs

@@ -33,15 +33,15 @@ import Utility.UserInfo
  - directory. -}
 fromCwd :: IO Repo
 fromCwd = getCurrentDirectory >>= seekUp checkForRepo
-	where
-		norepo = error "Not in a git repository."
-		seekUp check dir = do
-			r <- check dir
-			case r of
-				Nothing -> case parentDir dir of
-					"" -> norepo
-					d -> seekUp check d
-				Just loc -> newFrom loc
+  where
+	norepo = error "Not in a git repository."
+	seekUp check dir = do
+		r <- check dir
+		case r of
+			Nothing -> case parentDir dir of
+				"" -> norepo
+				d -> seekUp check d
+			Just loc -> newFrom loc
 
 {- Local Repo constructor, accepts a relative or absolute path. -}
 fromPath :: FilePath -> IO Repo
@@ -55,21 +55,21 @@ fromAbsPath dir
 		ifM (doesDirectoryExist dir') ( ret dir' , hunt )
 	| otherwise =
 		error $ "internal error, " ++ dir ++ " is not absolute"
-	where
-		ret = newFrom . LocalUnknown
- 		{- Git always looks for "dir.git" in preference to
-		 - to "dir", even if dir ends in a "/". -}
-		canondir = dropTrailingPathSeparator dir
-		dir' = canondir ++ ".git"
-		{- When dir == "foo/.git", git looks for "foo/.git/.git",
-		 - and failing that, uses "foo" as the repository. -}
-		hunt
-			| "/.git" `isSuffixOf` canondir =
-				ifM (doesDirectoryExist $ dir </> ".git")
-					( ret dir
-					, ret $ takeDirectory canondir
-					)
-			| otherwise = ret dir
+  where
+	ret = newFrom . LocalUnknown
+	{- Git always looks for "dir.git" in preference to
+	 - to "dir", even if dir ends in a "/". -}
+	canondir = dropTrailingPathSeparator dir
+	dir' = canondir ++ ".git"
+	{- When dir == "foo/.git", git looks for "foo/.git/.git",
+	 - and failing that, uses "foo" as the repository. -}
+	hunt
+		| "/.git" `isSuffixOf` canondir =
+			ifM (doesDirectoryExist $ dir </> ".git")
+				( ret dir
+				, ret $ takeDirectory canondir
+				)
+		| otherwise = ret dir
 
 {- Remote Repo constructor. Throws exception on invalid url.
  -
@@ -85,9 +85,9 @@ fromUrlStrict :: String -> IO Repo
 fromUrlStrict url
 	| startswith "file://" url = fromAbsPath $ uriPath u
 	| otherwise = newFrom $ Url u
-	where
-		u = fromMaybe bad $ parseURI url
-		bad = error $ "bad url " ++ url
+  where
+	u = fromMaybe bad $ parseURI url
+	bad = error $ "bad url " ++ url
 
 {- Creates a repo that has an unknown location. -}
 fromUnknown :: IO Repo
@@ -100,21 +100,23 @@ localToUrl reference r
 	| not $ repoIsUrl reference = error "internal error; reference repo not url"
 	| repoIsUrl r = r
 	| otherwise = r { location = Url $ fromJust $ parseURI absurl }
-	where
-		absurl =
-			Url.scheme reference ++ "//" ++
-			Url.authority reference ++
-			repoPath r
+  where
+	absurl = concat
+		[ Url.scheme reference
+		, "//"
+		, Url.authority reference
+		, repoPath r
+		]
 
 {- Calculates a list of a repo's configured remotes, by parsing its config. -}
 fromRemotes :: Repo -> IO [Repo]
 fromRemotes repo = mapM construct remotepairs
-	where
-		filterconfig f = filter f $ M.toList $ config repo
-		filterkeys f = filterconfig (\(k,_) -> f k)
-		remotepairs = filterkeys isremote
-		isremote k = startswith "remote." k && endswith ".url" k
-		construct (k,v) = remoteNamedFromKey k $ fromRemoteLocation v repo
+  where
+	filterconfig f = filter f $ M.toList $ config repo
+	filterkeys f = filterconfig (\(k,_) -> f k)
+	remotepairs = filterkeys isremote
+	isremote k = startswith "remote." k && endswith ".url" k
+	construct (k,v) = remoteNamedFromKey k $ fromRemoteLocation v repo
 
 {- Sets the name of a remote when constructing the Repo to represent it. -}
 remoteNamed :: String -> IO Repo -> IO Repo
@@ -126,50 +128,48 @@ remoteNamed n constructor = do
    "remote.foo.url". -}
 remoteNamedFromKey :: String -> IO Repo -> IO Repo
 remoteNamedFromKey k = remoteNamed basename
-	where
-		basename = join "." $ reverse $ drop 1 $
-				reverse $ drop 1 $ split "." k
+  where
+	basename = join "." $ reverse $ drop 1 $ reverse $ drop 1 $ split "." k
 
 {- Constructs a new Repo for one of a Repo's remotes using a given
  - location (ie, an url). -}
 fromRemoteLocation :: String -> Repo -> IO Repo
 fromRemoteLocation s repo = gen $ calcloc s
-	where
-		gen v	
-			| scpstyle v = fromUrl $ scptourl v
-			| urlstyle v = fromUrl v
-			| otherwise = fromRemotePath v repo
-		-- insteadof config can rewrite remote location
-		calcloc l
-			| null insteadofs = l
-			| otherwise = replacement ++ drop (length bestvalue) l
-			where
-				replacement = drop (length prefix) $
-					take (length bestkey - length suffix) bestkey
-				(bestkey, bestvalue) = maximumBy longestvalue insteadofs
-				longestvalue (_, a) (_, b) = compare b a
-				insteadofs = filterconfig $ \(k, v) -> 
-					startswith prefix k &&
-					endswith suffix k &&
-					startswith v l
-				filterconfig f = filter f $
-					concatMap splitconfigs $
-						M.toList $ fullconfig repo
-				splitconfigs (k, vs) = map (\v -> (k, v)) vs
-				(prefix, suffix) = ("url." , ".insteadof")
-		urlstyle v = isURI v || ":" `isInfixOf` v && "//" `isInfixOf` v
-		-- git remotes can be written scp style -- [user@]host:dir
-		-- but foo::bar is a git-remote-helper location instead
-		scpstyle v = ":" `isInfixOf` v 
-			&& not ("//" `isInfixOf` v)
-			&& not ("::" `isInfixOf` v)
-		scptourl v = "ssh://" ++ host ++ slash dir
-			where
-				(host, dir) = separate (== ':') v
-				slash d	| d == "" = "/~/" ++ d
-					| "/" `isPrefixOf` d = d
-					| "~" `isPrefixOf` d = '/':d
-					| otherwise = "/~/" ++ d
+  where
+	gen v	
+		| scpstyle v = fromUrl $ scptourl v
+		| urlstyle v = fromUrl v
+		| otherwise = fromRemotePath v repo
+	-- insteadof config can rewrite remote location
+	calcloc l
+		| null insteadofs = l
+		| otherwise = replacement ++ drop (length bestvalue) l
+	  where
+		replacement = drop (length prefix) $
+			take (length bestkey - length suffix) bestkey
+		(bestkey, bestvalue) = maximumBy longestvalue insteadofs
+		longestvalue (_, a) (_, b) = compare b a
+		insteadofs = filterconfig $ \(k, v) -> 
+			startswith prefix k &&
+			endswith suffix k &&
+			startswith v l
+		filterconfig f = filter f $
+			concatMap splitconfigs $ M.toList $ fullconfig repo
+		splitconfigs (k, vs) = map (\v -> (k, v)) vs
+		(prefix, suffix) = ("url." , ".insteadof")
+	urlstyle v = isURI v || ":" `isInfixOf` v && "//" `isInfixOf` v
+	-- git remotes can be written scp style -- [user@]host:dir
+	-- but foo::bar is a git-remote-helper location instead
+	scpstyle v = ":" `isInfixOf` v 
+		&& not ("//" `isInfixOf` v)
+		&& not ("::" `isInfixOf` v)
+	scptourl v = "ssh://" ++ host ++ slash dir
+	  where
+		(host, dir) = separate (== ':') v
+		slash d	| d == "" = "/~/" ++ d
+			| "/" `isPrefixOf` d = d
+			| "~" `isPrefixOf` d = '/':d
+			| otherwise = "/~/" ++ d
 
 {- Constructs a Repo from the path specified in the git remotes of
  - another Repo. -}
@@ -191,25 +191,25 @@ repoAbsPath d = do
 
 expandTilde :: FilePath -> IO FilePath
 expandTilde = expandt True
-	where
-		expandt _ [] = return ""
-		expandt _ ('/':cs) = do
-			v <- expandt True cs
-			return ('/':v)
-		expandt True ('~':'/':cs) = do
-			h <- myHomeDir
-			return $ h </> cs
-		expandt True ('~':cs) = do
-			let (name, rest) = findname "" cs
-			u <- getUserEntryForName name
-			return $ homeDirectory u </> rest
-		expandt _ (c:cs) = do
-			v <- expandt False cs
-			return (c:v)
-		findname n [] = (n, "")
-		findname n (c:cs)
-			| c == '/' = (n, cs)
-			| otherwise = findname (n++[c]) cs
+  where
+	expandt _ [] = return ""
+	expandt _ ('/':cs) = do
+		v <- expandt True cs
+		return ('/':v)
+	expandt True ('~':'/':cs) = do
+		h <- myHomeDir
+		return $ h </> cs
+	expandt True ('~':cs) = do
+		let (name, rest) = findname "" cs
+		u <- getUserEntryForName name
+		return $ homeDirectory u </> rest
+	expandt _ (c:cs) = do
+		v <- expandt False cs
+		return (c:v)
+	findname n [] = (n, "")
+	findname n (c:cs)
+		| c == '/' = (n, cs)
+		| otherwise = findname (n++[c]) cs
 
 checkForRepo :: FilePath -> IO (Maybe RepoLocation)
 checkForRepo dir = 
@@ -217,28 +217,28 @@ checkForRepo dir =
 		check gitDirFile $
 			check isBareRepo $
 				return Nothing
-	where
-		check test cont = maybe cont (return . Just) =<< test
-		checkdir c = ifM c
-			( return $ Just $ LocalUnknown dir
-			, return Nothing
-			)
-		isRepo = checkdir $ gitSignature $ ".git" </> "config"
-		isBareRepo = checkdir $ gitSignature "config"
-			<&&> doesDirectoryExist (dir </> "objects")
-		gitDirFile = do
-			c <- firstLine <$>
-				catchDefaultIO "" (readFile $ dir </> ".git")
-			return $ if gitdirprefix `isPrefixOf` c
-				then Just $ Local 
-					{ gitdir = absPathFrom dir $
-						drop (length gitdirprefix) c
-					, worktree = Just dir
-					}
-				else Nothing
-			where
-				gitdirprefix = "gitdir: "
-		gitSignature file = doesFileExist $ dir </> file
+  where
+	check test cont = maybe cont (return . Just) =<< test
+	checkdir c = ifM c
+		( return $ Just $ LocalUnknown dir
+		, return Nothing
+		)
+	isRepo = checkdir $ gitSignature $ ".git" </> "config"
+	isBareRepo = checkdir $ gitSignature "config"
+		<&&> doesDirectoryExist (dir </> "objects")
+	gitDirFile = do
+		c <- firstLine <$>
+			catchDefaultIO "" (readFile $ dir </> ".git")
+		return $ if gitdirprefix `isPrefixOf` c
+			then Just $ Local 
+				{ gitdir = absPathFrom dir $
+					drop (length gitdirprefix) c
+				, worktree = Just dir
+				}
+			else Nothing
+	  where
+		gitdirprefix = "gitdir: "
+	gitSignature file = doesFileExist $ dir </> file
 
 newFrom :: RepoLocation -> IO Repo
 newFrom l = return Repo

Git/CurrentRepo.hs

@@ -39,23 +39,23 @@ get = do
 			unless (d `dirContains` cwd) $
 				changeWorkingDirectory d
 			return $ addworktree wt r
-	where
-		pathenv s = do
-			v <- getEnv s
-			case v of
-				Just d -> do
-					unsetEnv s
-					Just <$> absPath d
-				Nothing -> return Nothing
-		configure Nothing r = Git.Config.read r
-		configure (Just d) r = do
-			r' <- Git.Config.read r
-			-- Let GIT_DIR override the default gitdir.
-			absd <- absPath d
-			return $ changelocation r' $ Local
-				{ gitdir = absd
-				, worktree = worktree (location r')
-				}
-		addworktree w r = changelocation r $
-			Local { gitdir = gitdir (location r), worktree = w }
-		changelocation r l = r { location = l }
+  where
+	pathenv s = do
+		v <- getEnv s
+		case v of
+			Just d -> do
+				unsetEnv s
+				Just <$> absPath d
+			Nothing -> return Nothing
+	configure Nothing r = Git.Config.read r
+	configure (Just d) r = do
+		r' <- Git.Config.read r
+		-- Let GIT_DIR override the default gitdir.
+		absd <- absPath d
+		return $ changelocation r' $ Local
+			{ gitdir = absd
+			, worktree = worktree (location r')
+			}
+	addworktree w r = changelocation r $
+		Local { gitdir = gitdir (location r), worktree = w }
+	changelocation r l = r { location = l }

Git/HashObject.hs

@@ -29,17 +29,17 @@ hashObjectStop = CoProcess.stop
 {- Injects a file into git, returning the Sha of the object. -}
 hashFile :: HashObjectHandle -> FilePath -> IO Sha
 hashFile h file = CoProcess.query h send receive
-	where
-		send to = do
-			fileEncoding to
-			hPutStrLn to file
-		receive from = getSha "hash-object" $ hGetLine from
+  where
+	send to = do
+		fileEncoding to
+		hPutStrLn to file
+	receive from = getSha "hash-object" $ hGetLine from
 
 {- Injects some content into git, returning its Sha. -}
 hashObject :: ObjectType -> String -> Repo -> IO Sha
 hashObject objtype content repo = getSha subcmd $ do
 	s <- pipeWriteRead (map Param params) content repo
 	return s
-	where
-		subcmd = "hash-object"
-		params = [subcmd, "-t", show objtype, "-w", "--stdin"]
+  where
+	subcmd = "hash-object"
+	params = [subcmd, "-t", show objtype, "-w", "--stdin"]

Git/Index.hs

@@ -21,7 +21,7 @@ override index = do
 	res <- getEnv var
 	setEnv var index True
 	return $ reset res
-	where
-		var = "GIT_INDEX_FILE"
-		reset (Just v) = setEnv var v True
-		reset _ = unsetEnv var
+  where
+	var = "GIT_INDEX_FILE"
+	reset (Just v) = setEnv var v True
+	reset _ = unsetEnv var

Git/LsFiles.hs

@@ -31,12 +31,12 @@ inRepo l = pipeNullSplit $ Params "ls-files --cached -z --" : map File l
 {- Scans for files at the specified locations that are not checked into git. -}
 notInRepo :: Bool -> [FilePath] -> Repo -> IO ([FilePath], IO Bool)
 notInRepo include_ignored l repo = pipeNullSplit params repo
-	where
-		params = [Params "ls-files --others"] ++ exclude ++
-			[Params "-z --"] ++ map File l
-		exclude
-			| include_ignored = []
-			| otherwise = [Param "--exclude-standard"]
+  where
+	params = [Params "ls-files --others"] ++ exclude ++
+		[Params "-z --"] ++ map File l
+	exclude
+		| include_ignored = []
+		| otherwise = [Param "--exclude-standard"]
 
 {- Returns a list of all files that are staged for commit. -}
 staged :: [FilePath] -> Repo -> IO ([FilePath], IO Bool)
@@ -49,15 +49,15 @@ stagedNotDeleted = staged' [Param "--diff-filter=ACMRT"]
 
 staged' :: [CommandParam] -> [FilePath] -> Repo -> IO ([FilePath], IO Bool)
 staged' ps l = pipeNullSplit $ prefix ++ ps ++ suffix
-	where
-		prefix = [Params "diff --cached --name-only -z"]
-		suffix = Param "--" : map File l
+  where
+	prefix = [Params "diff --cached --name-only -z"]
+	suffix = Param "--" : map File l
 
 {- Returns a list of files that have unstaged changes. -}
 changedUnstaged :: [FilePath] -> Repo -> IO ([FilePath], IO Bool)
 changedUnstaged l = pipeNullSplit params
-	where
-		params = Params "diff --name-only -z --" : map File l
+  where
+	params = Params "diff --name-only -z --" : map File l
 
 {- Returns a list of the files in the specified locations that are staged
  - for commit, and whose type has changed. -}
@@ -77,9 +77,9 @@ typeChanged' ps l repo = do
 	let top = repoPath repo
 	cwd <- getCurrentDirectory
 	return (map (\f -> relPathDirToFile cwd $ top </> f) fs, cleanup)
-	where
-		prefix = [Params "diff --name-only --diff-filter=T -z"]
-		suffix = Param "--" : map File l
+  where
+	prefix = [Params "diff --name-only --diff-filter=T -z"]
+	suffix = Param "--" : map File l
 
 {- A item in conflict has two possible values.
  - Either can be Nothing, when that side deleted the file. -}
@@ -108,8 +108,8 @@ unmerged :: [FilePath] -> Repo -> IO ([Unmerged], IO Bool)
 unmerged l repo = do
 	(fs, cleanup) <- pipeNullSplit params repo
 	return (reduceUnmerged [] $ catMaybes $ map parseUnmerged fs, cleanup)
-	where
-		params = Params "ls-files --unmerged -z --" : map File l
+  where
+	params = Params "ls-files --unmerged -z --" : map File l
 
 data InternalUnmerged = InternalUnmerged
 	{ isus :: Bool
@@ -131,28 +131,28 @@ parseUnmerged s
 			return $ InternalUnmerged (stage == 2) file
 				(Just blobtype) (Just sha)
 		_ -> Nothing
-	where
-		(metadata, file) = separate (== '\t') s
+  where
+	(metadata, file) = separate (== '\t') s
 
 reduceUnmerged :: [Unmerged] -> [InternalUnmerged] -> [Unmerged]
 reduceUnmerged c [] = c
 reduceUnmerged c (i:is) = reduceUnmerged (new:c) rest
-	where
-		(rest, sibi) = findsib i is
-		(blobtypeA, blobtypeB, shaA, shaB)
-			| isus i    = (iblobtype i, iblobtype sibi, isha i, isha sibi)
-			| otherwise = (iblobtype sibi, iblobtype i, isha sibi, isha i)
-		new = Unmerged
-			{ unmergedFile = ifile i
-			, unmergedBlobType = Conflicting blobtypeA blobtypeB
-			, unmergedSha = Conflicting shaA shaB
-			}
-		findsib templatei [] = ([], deleted templatei)
-		findsib templatei (l:ls)
-			| ifile l == ifile templatei = (ls, l)
-			| otherwise = (l:ls, deleted templatei)
-		deleted templatei = templatei
-			{ isus = not (isus templatei)
-			, iblobtype = Nothing
-			, isha = Nothing
-			}
+  where
+	(rest, sibi) = findsib i is
+	(blobtypeA, blobtypeB, shaA, shaB)
+		| isus i    = (iblobtype i, iblobtype sibi, isha i, isha sibi)
+		| otherwise = (iblobtype sibi, iblobtype i, isha sibi, isha i)
+	new = Unmerged
+		{ unmergedFile = ifile i
+		, unmergedBlobType = Conflicting blobtypeA blobtypeB
+		, unmergedSha = Conflicting shaA shaB
+		}
+	findsib templatei [] = ([], deleted templatei)
+	findsib templatei (l:ls)
+		| ifile l == ifile templatei = (ls, l)
+		| otherwise = (l:ls, deleted templatei)
+	deleted templatei = templatei
+		{ isus = not (isus templatei)
+		, iblobtype = Nothing
+		, isha = Nothing
+		}

Git/LsTree.hs

@@ -47,11 +47,11 @@ parseLsTree l = TreeItem
 	, sha = s
 	, file = Git.Filename.decode f
 	}
-	where
-		-- l = <mode> SP <type> SP <sha> TAB <file>
-		-- All fields are fixed, so we can pull them out of
-		-- specific positions in the line.
-		(m, past_m) = splitAt 7 l
-		(t, past_t) = splitAt 4 past_m
-		(s, past_s) = splitAt 40 $ Prelude.tail past_t
-		f = Prelude.tail past_s
+  where
+	-- l = <mode> SP <type> SP <sha> TAB <file>
+	-- All fields are fixed, so we can pull them out of
+	-- specific positions in the line.
+	(m, past_m) = splitAt 7 l
+	(t, past_t) = splitAt 4 past_m
+	(s, past_s) = splitAt 40 $ Prelude.tail past_t
+	f = Prelude.tail past_s

Git/Queue.hs

@@ -86,30 +86,30 @@ new lim = Queue 0 (fromMaybe defaultLimit lim) M.empty
 addCommand :: String -> [CommandParam] -> [FilePath] -> Queue -> Repo -> IO Queue
 addCommand subcommand params files q repo =
 	updateQueue action different (length newfiles) q repo
-	where
-		key = actionKey action
-		action = CommandAction
-			{ getSubcommand = subcommand
-			, getParams = params
-			, getFiles = newfiles
-			}
-		newfiles = files ++ maybe [] getFiles (M.lookup key $ items q)
+  where
+	key = actionKey action
+	action = CommandAction
+		{ getSubcommand = subcommand
+		, getParams = params
+		, getFiles = newfiles
+		}
+	newfiles = files ++ maybe [] getFiles (M.lookup key $ items q)
 		
-		different (CommandAction { getSubcommand = s }) = s /= subcommand
-		different _ = True
+	different (CommandAction { getSubcommand = s }) = s /= subcommand
+	different _ = True
 
 {- Adds an update-index streamer to the queue. -}
 addUpdateIndex :: Git.UpdateIndex.Streamer -> Queue -> Repo -> IO Queue
 addUpdateIndex streamer q repo =
 	updateQueue action different 1 q repo
-	where
-		key = actionKey action
-		-- the list is built in reverse order
-		action = UpdateIndexAction $ streamer : streamers
-		streamers = maybe [] getStreamers $ M.lookup key $ items q
+  where
+	key = actionKey action
+	-- the list is built in reverse order
+	action = UpdateIndexAction $ streamer : streamers
+	streamers = maybe [] getStreamers $ M.lookup key $ items q
 
-		different (UpdateIndexAction _) = False
-		different _ = True
+	different (UpdateIndexAction _) = False
+	different _ = True
 
 {- Updates or adds an action in the queue. If the queue already contains a
  - different action, it will be flushed; this is to ensure that conflicting
@@ -118,15 +118,15 @@ updateQueue :: Action -> (Action -> Bool) -> Int -> Queue -> Repo -> IO Queue
 updateQueue !action different sizeincrease q repo
 	| null (filter different (M.elems (items q))) = return $ go q
 	| otherwise = go <$> flush q repo
-	where
-		go q' = newq
-			where		
-				!newq = q'
-					{ size = newsize
-					, items = newitems
-					}
-				!newsize = size q' + sizeincrease
-				!newitems = M.insertWith' const (actionKey action) action (items q')
+  where
+	go q' = newq
+	  where		
+		!newq = q'
+			{ size = newsize
+			, items = newitems
+			}
+		!newsize = size q' + sizeincrease
+		!newitems = M.insertWith' const (actionKey action) action (items q')
 
 {- Is a queue large enough that it should be flushed? -}
 full :: Queue -> Bool
@@ -153,8 +153,8 @@ runAction repo action@(CommandAction {}) =
 		fileEncoding h
 		hPutStr h $ join "\0" $ getFiles action
 		hClose h
-	where
-		p = (proc "xargs" params) { env = gitEnv repo }
-		params = "-0":"git":baseparams
-		baseparams = toCommand $ gitCommandLine
-			(Param (getSubcommand action):getParams action) repo
+  where
+	p = (proc "xargs" params) { env = gitEnv repo }
+	params = "-0":"git":baseparams
+	baseparams = toCommand $ gitCommandLine
+		(Param (getSubcommand action):getParams action) repo

Git/Ref.hs

@@ -21,10 +21,10 @@ describe = show . base
  - Converts such a fully qualified ref into a base ref (eg: master). -}
 base :: Ref -> Ref
 base = Ref . remove "refs/heads/" . remove "refs/remotes/" . show
-	where
-		remove prefix s
-			| prefix `isPrefixOf` s = drop (length prefix) s
-			| otherwise = s
+  where
+	remove prefix s
+		| prefix `isPrefixOf` s = drop (length prefix) s
+		| otherwise = s
 
 {- Given a directory such as "refs/remotes/origin", and a ref such as
  - refs/heads/master, yields a version of that ref under the directory,
@@ -40,51 +40,51 @@ exists ref = runBool "show-ref"
 {- Get the sha of a fully qualified git ref, if it exists. -}
 sha :: Branch -> Repo -> IO (Maybe Sha)
 sha branch repo = process <$> showref repo
-	where
-		showref = pipeReadStrict [Param "show-ref",
-			Param "--hash", -- get the hash
-			Param $ show branch]
-		process [] = Nothing
-		process s = Just $ Ref $ firstLine s
+  where
+	showref = pipeReadStrict [Param "show-ref",
+		Param "--hash", -- get the hash
+		Param $ show branch]
+	process [] = Nothing
+	process s = Just $ Ref $ firstLine s
 
 {- List of (refs, branches) matching a given ref spec. -}
 matching :: Ref -> Repo -> IO [(Ref, Branch)]
 matching ref repo = map gen . lines <$> 
 	pipeReadStrict [Param "show-ref", Param $ show ref] repo
-	where
-		gen l = let (r, b) = separate (== ' ') l in
-			(Ref r, Ref b)
+  where
+	gen l = let (r, b) = separate (== ' ') l
+		in (Ref r, Ref b)
 
 {- List of (refs, branches) matching a given ref spec.
  - Duplicate refs are filtered out. -}
 matchingUniq :: Ref -> Repo -> IO [(Ref, Branch)]
 matchingUniq ref repo = nubBy uniqref <$> matching ref repo
-	where
-		uniqref (a, _) (b, _) = a == b
+  where
+	uniqref (a, _) (b, _) = a == b
 
 {- Checks if a String is a legal git ref name.
  -
  - The rules for this are complex; see git-check-ref-format(1) -}
 legal :: Bool -> String -> Bool
 legal allowonelevel s = all (== False) illegal
-	where
-		illegal =
-			[ any ("." `isPrefixOf`) pathbits
-			, any (".lock" `isSuffixOf`) pathbits
-			, not allowonelevel && length pathbits < 2
-			, contains ".."
-			, any (\c -> contains [c]) illegalchars
-			, begins "/"
-			, ends "/"
-			, contains "//"
-			, ends "."
-			, contains "@{"
-			, null s
-			]
-		contains v = v `isInfixOf` s
-		ends v = v `isSuffixOf` s
-		begins v = v `isPrefixOf` s
+  where
+	illegal =
+		[ any ("." `isPrefixOf`) pathbits
+		, any (".lock" `isSuffixOf`) pathbits
+		, not allowonelevel && length pathbits < 2
+		, contains ".."
+		, any (\c -> contains [c]) illegalchars
+		, begins "/"
+		, ends "/"
+		, contains "//"
+		, ends "."
+		, contains "@{"
+		, null s
+		]
+	contains v = v `isInfixOf` s
+	ends v = v `isSuffixOf` s
+	begins v = v `isPrefixOf` s
 
-		pathbits = split "/" s
-		illegalchars = " ~^:?*[\\" ++ controlchars
-		controlchars = chr 0o177 : [chr 0 .. chr (0o40-1)]
+	pathbits = split "/" s
+	illegalchars = " ~^:?*[\\" ++ controlchars
+	controlchars = chr 0o177 : [chr 0 .. chr (0o40-1)]

Git/Sha.hs

@@ -14,8 +14,8 @@ import Git.Types
    any trailing newline, returning the sha. -}
 getSha :: String -> IO String -> IO Sha
 getSha subcommand a = maybe bad return =<< extractSha <$> a
-	where
-		bad = error $ "failed to read sha from git " ++ subcommand
+  where
+	bad = error $ "failed to read sha from git " ++ subcommand
 
 {- Extracts the Sha from a string. There can be a trailing newline after
  - it, but nothing else. -}
@@ -24,12 +24,12 @@ extractSha s
 	| len == shaSize = val s
 	| len == shaSize + 1 && length s' == shaSize = val s'
 	| otherwise = Nothing
-	where
-		len = length s
-		s' = firstLine s
-		val v
-			| all (`elem` "1234567890ABCDEFabcdef") v = Just $ Ref v
-			| otherwise = Nothing
+  where
+	len = length s
+	s' = firstLine s
+	val v
+		| all (`elem` "1234567890ABCDEFabcdef") v = Just $ Ref v
+		| otherwise = Nothing
 
 {- Size of a git sha. -}
 shaSize :: Int

Git/UnionMerge.hs

@@ -62,11 +62,11 @@ doMerge ch differ repo streamer = do
 	(diff, cleanup) <- pipeNullSplit (map Param differ) repo
 	go diff
 	void $ cleanup
-	where
-		go [] = noop
-		go (info:file:rest) = mergeFile info file ch repo >>=
-			maybe (go rest) (\l -> streamer l >> go rest)
-		go (_:[]) = error $ "parse error " ++ show differ
+  where
+	go [] = noop
+	go (info:file:rest) = mergeFile info file ch repo >>=
+		maybe (go rest) (\l -> streamer l >> go rest)
+	go (_:[]) = error $ "parse error " ++ show differ
 
 {- Given an info line from a git raw diff, and the filename, generates
  - a line suitable for update-index that union merges the two sides of the
@@ -78,16 +78,16 @@ mergeFile info file h repo = case filter (/= nullSha) [Ref asha, Ref bsha] of
 	shas -> use
 		=<< either return (\s -> hashObject BlobObject (unlines s) repo)
 		=<< calcMerge . zip shas <$> mapM getcontents shas
-	where
-		[_colonmode, _bmode, asha, bsha, _status] = words info
-		use sha = return $ Just $
-			updateIndexLine sha FileBlob $ asTopFilePath file
-		-- We don't know how the file is encoded, but need to
-		-- split it into lines to union merge. Using the
-		-- FileSystemEncoding for this is a hack, but ensures there
-		-- are no decoding errors. Note that this works because
-		-- hashObject sets fileEncoding on its write handle.
-		getcontents s = lines . encodeW8 . L.unpack <$> catObject h s
+  where
+	[_colonmode, _bmode, asha, bsha, _status] = words info
+	use sha = return $ Just $
+		updateIndexLine sha FileBlob $ asTopFilePath file
+	-- We don't know how the file is encoded, but need to
+	-- split it into lines to union merge. Using the
+	-- FileSystemEncoding for this is a hack, but ensures there
+	-- are no decoding errors. Note that this works because
+	-- hashObject sets fileEncoding on its write handle.
+	getcontents s = lines . encodeW8 . L.unpack <$> catObject h s
 
 {- Calculates a union merge between a list of refs, with contents.
  -
@@ -98,7 +98,7 @@ calcMerge :: [(Ref, [String])] -> Either Ref [String]
 calcMerge shacontents
 	| null reuseable = Right $ new
 	| otherwise = Left $ fst $ Prelude.head reuseable
-	where
-		reuseable = filter (\c -> sorteduniq (snd c) == new) shacontents
-		new = sorteduniq $ concat $ map snd shacontents
-		sorteduniq = S.toList . S.fromList
+  where
+	reuseable = filter (\c -> sorteduniq (snd c) == new) shacontents
+	new = sorteduniq $ concat $ map snd shacontents
+	sorteduniq = S.toList . S.fromList

Git/UpdateIndex.hs

@@ -38,12 +38,12 @@ streamUpdateIndex repo as = pipeWrite params repo $ \h -> do
 	fileEncoding h
 	forM_ as (stream h)
 	hClose h
-	where
-		params = map Param ["update-index", "-z", "--index-info"]
-		stream h a = a (streamer h)
-		streamer h s = do
-			hPutStr h s
-			hPutStr h "\0"
+  where
+	params = map Param ["update-index", "-z", "--index-info"]
+	stream h a = a (streamer h)
+	streamer h s = do
+		hPutStr h s
+		hPutStr h "\0"
 
 {- A streamer that adds the current tree for a ref. Useful for eg, copying
  - and modifying branches. -}
@@ -52,8 +52,8 @@ lsTree (Ref x) repo streamer = do
 	(s, cleanup) <- pipeNullSplit params repo
 	mapM_ streamer s
 	void $ cleanup
-	where
-		params = map Param ["ls-tree", "-z", "-r", "--full-tree", x]
+  where
+	params = map Param ["ls-tree", "-z", "-r", "--full-tree", x]
 
 {- Generates a line suitable to be fed into update-index, to add
  - a given file with a given sha. -}

Git/Url.hs

@@ -28,13 +28,13 @@ scheme repo = notUrl repo
  - <http://trac.haskell.org/network/ticket/40> -}
 uriRegName' :: URIAuth -> String
 uriRegName' a = fixup $ uriRegName a
-	where
-		fixup x@('[':rest)
-			| rest !! len == ']' = take len rest
-			| otherwise = x
-			where
-				len  = length rest - 1
-		fixup x = x
+  where
+	fixup x@('[':rest)
+		| rest !! len == ']' = take len rest
+		| otherwise = x
+	  where
+		len  = length rest - 1
+	fixup x = x
 
 {- Hostname of an URL repo. -}
 host :: Repo -> String
@@ -55,14 +55,14 @@ hostuser r = authpart uriUserInfo r ++ authpart uriRegName' r
 {- The full authority portion an URL repo. (ie, "user@host:port") -}
 authority :: Repo -> String
 authority = authpart assemble
-	where
-		assemble a = uriUserInfo a ++ uriRegName' a ++ uriPort a
+  where
+	assemble a = uriUserInfo a ++ uriRegName' a ++ uriPort a
 
 {- Applies a function to extract part of the uriAuthority of an URL repo. -}
 authpart :: (URIAuth -> a) -> Repo -> a
 authpart a Repo { location = Url u } = a auth
-	where
-		auth = fromMaybe (error $ "bad url " ++ show u) (uriAuthority u)
+  where
+	auth = fromMaybe (error $ "bad url " ++ show u) (uriAuthority u)
 authpart _ repo = notUrl repo
 
 notUrl :: Repo -> a

Git/Version.hs

@@ -26,13 +26,13 @@ normalize :: String -> Integer
 normalize = sum . mult 1 . reverse .
 		extend precision . take precision .
 		map readi . split "."
-	where
-		extend n l = l ++ replicate (n - length l) 0
-		mult _ [] = []
-		mult n (x:xs) = (n*x) : mult (n*10^width) xs
-		readi :: String -> Integer
-		readi s = case reads s of
-			((x,_):_) -> x
-			_ -> 0
-		precision = 10 -- number of segments of the version to compare
-		width = length "yyyymmddhhmmss" -- maximum width of a segment
+  where
+	extend n l = l ++ replicate (n - length l) 0
+	mult _ [] = []
+	mult n (x:xs) = (n*x) : mult (n*10^width) xs
+	readi :: String -> Integer
+	readi s = case reads s of
+		((x,_):_) -> x
+		_ -> 0
+	precision = 10 -- number of segments of the version to compare
+	width = length "yyyymmddhhmmss" -- maximum width of a segment