diff options
Diffstat (limited to 'app/AddPath.hs')
| -rw-r--r-- | app/AddPath.hs | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/app/AddPath.hs b/app/AddPath.hs index 683b82f..df53326 100644 --- a/app/AddPath.hs +++ b/app/AddPath.hs @@ -7,9 +7,9 @@ module Main (main) where -import Control.Monad (void, when) +import Control.Monad (unless, void) import Control.Monad.Trans.Except (catchE, runExceptT, throwE) -import Data.List (union) +import Data.List ((\\), nub) import System.IO.Error (ioError, isDoesNotExistError) import Options.Applicative @@ -21,9 +21,10 @@ import Utils.PromptMessage data Options = Options { optName :: WindowsEnv.VarName - , optYes :: Bool - , optGlobal :: Bool - , optPaths :: [WindowsEnv.VarValue] + , optYes :: Bool + , optGlobal :: Bool + , optPrepend :: Bool + , optPaths :: [WindowsEnv.VarValue] } deriving (Eq, Show) optionParser :: Parser Options @@ -31,6 +32,7 @@ optionParser = Options <$> optNameDesc <*> optYesDesc <*> optGlobalDesc + <*> optPrependDesc <*> optPathsDesc where optNameDesc = strOption @@ -43,6 +45,9 @@ optionParser = Options optGlobalDesc = switch $ long "global" <> short 'g' <> help "Add for all users" + optPrependDesc = switch + $ long "prepend" <> short 'p' + <> help "Prepend to the variable (instead of appending)" optPathsDesc = many $ argument str $ metavar "PATH" <> help "Directories to add" @@ -57,7 +62,7 @@ addPath :: Options -> IO () addPath options = runExceptT doAddPath >>= either ioError return where varName = optName options - pathsToAdd = optPaths options + pathsToAdd = nub $ optPaths options forAllUsers = optGlobal options profile @@ -66,6 +71,11 @@ addPath options = runExceptT doAddPath >>= either ioError return skipPrompt = optYes options + prepend = optPrepend options + append xs ys + | prepend = ys ++ xs + | otherwise = xs ++ ys + emptyIfMissing e | isDoesNotExistError e = return "" | otherwise = throwE e @@ -73,9 +83,9 @@ addPath options = runExceptT doAddPath >>= either ioError return doAddPath = do oldValue <- WindowsEnv.query profile varName `catchE` emptyIfMissing let oldPaths = WindowsEnv.pathSplit oldValue - let newPaths = oldPaths `union` pathsToAdd - when (length oldPaths /= length newPaths) $ do - let newValue = WindowsEnv.pathJoin newPaths + let newPaths = pathsToAdd \\ oldPaths + unless (null newPaths) $ do + let newValue = WindowsEnv.pathJoin $ append oldPaths newPaths let promptAnd = if skipPrompt then withoutPrompt else withPrompt $ oldNewMessage profile varName oldValue newValue |