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-rw-r--r--apps/AddPath.hs97
1 files changed, 36 insertions, 61 deletions
diff --git a/apps/AddPath.hs b/apps/AddPath.hs
index e3f8ec3..85f2aa4 100644
--- a/apps/AddPath.hs
+++ b/apps/AddPath.hs
@@ -6,74 +6,49 @@
module Main (main) where
-import Control.Monad (mapM_, when)
-import System.Console.GetOpt
-import System.Environment (getArgs, getProgName)
-import System.Exit (exitFailure, exitSuccess)
-import System.IO (hPutStr, stderr)
+import Control.Monad (when)
-import qualified Environment
-
-main :: IO ()
-main = do
- rawArgs <- getArgs
- case getOpt Permute optionDescription rawArgs of
- (actions, args, []) -> do
- options <- foldl (>>=) (return defaultOptions) actions
- addPath args options
- (_, _, errorMessages) -> exitWithUsageErrors errorMessages
+import Options.Applicative
-addPath :: [String] -> Options -> IO ()
-addPath paths options = do
- missingPaths <- dropIncludedPaths paths
- when (not $ null missingPaths) $ do
- oldPath <- Environment.queryFromRegistry (env options) (name options)
- Environment.saveToRegistryWithPrompt (env options) (name options) $ Environment.joinPaths $ missingPaths ++ [oldPath]
- where
- dropIncludedPaths paths = do
- currentPath <- Environment.getEnv $ name options
- return $ filter (flip notElem $ Environment.splitPaths currentPath) paths
+import qualified Environment
data Options = Options
{ name :: String
- , env :: Environment.RegistryBasedEnvironment
+ , global :: Bool
+ , paths :: [String]
} deriving (Eq, Show)
-defaultOptions :: Options
-defaultOptions = Options
- { name = "PATH"
- , env = Environment.CurrentUserEnvironment
- }
-
-buildHelpMessage :: IO String
-buildHelpMessage = do
- header <- buildHeader
- return $ usageInfo header optionDescription
+options :: Parser Options
+options = Options
+ <$> nameOption
+ <*> globalOption
+ <*> pathArgs
where
- buildHeader :: IO String
- buildHeader = do
- progName <- getProgName
- return $ "Usage: " ++ progName ++ " [OPTIONS...] [PATH...]\nOptions:"
+ nameOption = strOption $
+ long "name" <> short 'n' <> metavar "NAME" <> value "PATH" <>
+ help "Specify variable name ('PATH' by default)"
+ globalOption = switch $
+ long "global" <> short 'g' <>
+ help "Whether to add for all users"
+ pathArgs = many $ argument str $
+ metavar "PATH" <>
+ help "Directory path(s)"
-exitWithHelpMessage :: a -> IO b
-exitWithHelpMessage _ = do
- helpMessage <- buildHelpMessage
- putStr helpMessage
- exitSuccess
-
-exitWithUsageErrors :: [String] -> IO a
-exitWithUsageErrors errorMessages = do
- hPutStr stderr $ concatMap ("Usage error: " ++) errorMessages
- helpMessage <- buildHelpMessage
- hPutStr stderr helpMessage
- exitFailure
-
-invalidNumberOfArguments :: IO a
-invalidNumberOfArguments = exitWithUsageErrors ["invalid number of arguments\n"]
+main :: IO ()
+main = execParser parser >>= addPath
+ where
+ parser = info (helper <*> options) $
+ fullDesc <> progDesc "Add directories to your PATH"
-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 { env = Environment.AllUsersEnvironment }) "add the path for all users"
- , Option "h" ["help"] (NoArg exitWithHelpMessage) "show this message and exit"
- ]
+addPath :: Options -> IO ()
+addPath options = do
+ missingPaths <- dropIncludedPaths $ paths options
+ when (not $ null missingPaths) $ do
+ oldPath <- Environment.queryFromRegistry env $ name options
+ Environment.saveToRegistryWithPrompt env (name options) $ Environment.joinPaths $ missingPaths ++ [oldPath]
+ where
+ dropIncludedPaths paths = do
+ currentPath <- Environment.getEnv $ name options
+ return $ filter (flip notElem $ Environment.splitPaths currentPath) paths
+ env | global options = Environment.AllUsersEnvironment
+ | otherwise = Environment.CurrentUserEnvironment