code style

1 files changed, 47 insertions, 45 deletions

diff --git a/apps/RemovePath.hs b/apps/RemovePath.hs
index 3071708..2f73e21 100644
--- a/apps/RemovePath.hs
+++ b/apps/RemovePath.hs
@@ -4,77 +4,79 @@
  - See LICENSE.txt for details.
 -}
 
-module Main ( main ) where
+module Main (main) where
 
-import Control.Monad ( when )
+import Control.Monad (when)
 import System.Console.GetOpt
-import System.Environment ( getArgs, getProgName )
-import System.Exit ( exitFailure, exitSuccess )
-import System.IO ( hPutStr, stderr )
+import System.Environment (getArgs, getProgName)
+import System.Exit (exitFailure, exitSuccess)
+import System.IO (hPutStr, stderr)
 
 import qualified Environment
 
 main :: IO ()
 main = do
-  rawArgs <- getArgs
-  case getOpt Permute optionDescription rawArgs of
-    (actions, args, []) -> do
-      options <- foldl (>>=) (return defaultOptions) actions
-      removePath args options
-    (_, _, errorMessages) -> exitWithUsageErrors errorMessages
+    rawArgs <- getArgs
+    case getOpt Permute optionDescription rawArgs of
+        (actions, args, []) -> do
+            options <- foldl (>>=) (return defaultOptions) actions
+            removePath args options
+        (_, _, errorMessages) -> exitWithUsageErrors errorMessages
 
 removePath :: [String] -> Options -> IO ()
 removePath paths options = do
-  let varName = name options
-  userVal <- Environment.queryFromRegistry Environment.CurrentUserEnvironment varName
-  let userValParts = Environment.splitPaths userVal
-  let newUserValParts = filter (`notElem` paths) userValParts
-  when (length userValParts /= length newUserValParts) $ do
-    Environment.saveToRegistryWithPrompt Environment.CurrentUserEnvironment varName $ Environment.joinPaths newUserValParts
-  when (global options) $ do
-    globalVal <- Environment.queryFromRegistry Environment.AllUsersEnvironment varName
-    let globalValParts = Environment.splitPaths globalVal
-    let newGlobalValParts = filter (`notElem` paths) globalValParts
-    when (length globalValParts /= length newGlobalValParts) $ do
-      Environment.saveToRegistryWithPrompt Environment.AllUsersEnvironment varName $ Environment.joinPaths newGlobalValParts
+    let varName = name options
+    userVal <- Environment.queryFromRegistry Environment.CurrentUserEnvironment varName
+    let userValParts = Environment.splitPaths userVal
+    let newUserValParts = filter (`notElem` paths) userValParts
+    when (length userValParts /= length newUserValParts) $ do
+        Environment.saveToRegistryWithPrompt Environment.CurrentUserEnvironment varName $ Environment.joinPaths newUserValParts
+    when (global options) $ do
+        globalVal <- Environment.queryFromRegistry Environment.AllUsersEnvironment varName
+        let globalValParts = Environment.splitPaths globalVal
+        let newGlobalValParts = filter (`notElem` paths) globalValParts
+        when (length globalValParts /= length newGlobalValParts) $ do
+            Environment.saveToRegistryWithPrompt Environment.AllUsersEnvironment varName $ Environment.joinPaths newGlobalValParts
 
-data Options = Options { name :: String
-                       , global :: Bool }
-                       deriving (Eq, Show)
+data Options = Options
+    { name :: String
+    , global :: Bool
+    } deriving (Eq, Show)
 
 defaultOptions :: Options
-defaultOptions = Options { name = "PATH"
-                         , global = False }
+defaultOptions = Options
+    { name = "PATH"
+    , global = False
+    }
 
 buildHelpMessage :: IO String
 buildHelpMessage = do
-  header <- buildHeader
-  return $ usageInfo header optionDescription
-    where
-      buildHeader :: IO String
-      buildHeader = do
+    header <- buildHeader
+    return $ usageInfo header optionDescription
+  where
+    buildHeader = do
         progName <- getProgName
         return $ "Usage: " ++ progName ++ " [OPTIONS...] [PATH...]\nOptions:"
 
 exitWithHelpMessage :: a -> IO b
 exitWithHelpMessage _ = do
-  helpMessage <- buildHelpMessage
-  putStr helpMessage
-  exitSuccess
+    helpMessage <- buildHelpMessage
+    putStr helpMessage
+    exitSuccess
 
 exitWithUsageErrors :: [String] -> IO a
 exitWithUsageErrors errorMessages = do
-  hPutStr stderr $ concatMap ("Usage error: " ++) errorMessages
-  helpMessage <- buildHelpMessage
-  hPutStr stderr helpMessage
-  exitFailure
+    hPutStr stderr $ concatMap ("Usage error: " ++) errorMessages
+    helpMessage <- buildHelpMessage
+    hPutStr stderr helpMessage
+    exitFailure
 
 invalidNumberOfArguments :: IO a
 invalidNumberOfArguments = exitWithUsageErrors ["invalid number of arguments\n"]
 
 optionDescription :: [OptDescr (Options -> IO Options)]
-optionDescription = [
-    Option "n" ["name"] (ReqArg (\s opts -> return opts { name = s }) "NAME") "set the variable name ('PATH' by default)",
-    Option "g" ["global"] (NoArg $ \opts -> return opts { global = True }) "remove the path for all users",
-    Option "h" ["help"] (NoArg exitWithHelpMessage) "show this message and exit"
-  ]
+optionDescription =
+    [ Option "n" ["name"] (ReqArg (\s opts -> return opts { name = s }) "NAME") "set the variable name ('PATH' by default)"
+    , Option "g" ["global"] (NoArg $ \opts -> return opts { global = True }) "remove the path for all users"
+    , Option "h" ["help"] (NoArg exitWithHelpMessage) "show this message and exit"
+    ]