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author | Egor Tensin <Egor.Tensin@gmail.com> | 2016-07-11 18:55:26 +0300 |
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committer | Egor Tensin <Egor.Tensin@gmail.com> | 2016-07-11 18:55:26 +0300 |
commit | d53c986113cef78e2b504ecd5a4bba60999a55e1 (patch) | |
tree | 445b892abcfa272153dc39968838dbdc5d34d684 /AddPath.hs | |
parent | README update (diff) | |
download | windows-env-d53c986113cef78e2b504ecd5a4bba60999a55e1.tar.gz windows-env-d53c986113cef78e2b504ecd5a4bba60999a55e1.zip |
become a proper stack project
Diffstat (limited to 'AddPath.hs')
-rw-r--r-- | AddPath.hs | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/AddPath.hs b/AddPath.hs deleted file mode 100644 index e17adc9..0000000 --- a/AddPath.hs +++ /dev/null @@ -1,76 +0,0 @@ -{- - - Copyright 2015 Egor Tensin <Egor.Tensin@gmail.com> - - This file is licensed under the terms of the MIT License. - - See LICENSE.txt for details. --} - -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 qualified EnvUtils - -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 - -addPath :: [String] -> Options -> IO () -addPath paths options = do - missingPaths <- dropIncludedPaths paths - when (not $ null missingPaths) $ do - oldPath <- EnvUtils.queryFromRegistry (env options) (name options) - EnvUtils.saveToRegistryWithPrompt (env options) (name options) $ EnvUtils.joinPaths $ missingPaths ++ [oldPath] - where - dropIncludedPaths paths = do - currentPath <- EnvUtils.getEnv $ name options - return $ filter (flip notElem $ EnvUtils.splitPaths currentPath) paths - -data Options = Options { name :: String - , env :: EnvUtils.RegistryBasedEnvironment } - deriving (Eq, Show) - -defaultOptions :: Options -defaultOptions = Options { name = "PATH" - , env = EnvUtils.CurrentUserEnvironment } - -buildHelpMessage :: IO String -buildHelpMessage = do - header <- buildHeader - return $ usageInfo header optionDescription - where - buildHeader :: IO String - buildHeader = do - progName <- getProgName - return $ "Usage: " ++ progName ++ " [OPTIONS...] [PATH...]\nOptions:" - -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"] - -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 = EnvUtils.AllUsersEnvironment }) "add the path for all users", - Option "h" ["help"] (NoArg exitWithHelpMessage) "show this message and exit" - ] |