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|
-- |
-- Copyright : (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
-- License : MIT
-- Maintainer : Egor.Tensin@gmail.com
-- Stability : experimental
-- Portability : Windows-only
module Main (main) where
import Control.Monad (void, when)
import Control.Monad.Trans.Except (catchE, runExceptT, throwE)
import System.IO.Error (ioError, isDoesNotExistError)
import Options.Applicative
import qualified WindowsEnv
import Utils.Prompt
import Utils.PromptMessage
data Options = Options
{ optName :: WindowsEnv.VarName
, optYes :: Bool
, optGlobal :: Bool
, optPaths :: [WindowsEnv.VarValue]
} deriving (Eq, Show)
optionParser :: Parser Options
optionParser = Options
<$> optNameDesc
<*> optYesDesc
<*> optGlobalDesc
<*> optPathsDesc
where
optNameDesc = strOption
$ long "name" <> short 'n'
<> metavar "NAME" <> value "PATH"
<> help "Variable name ('PATH' by default)"
optYesDesc = switch
$ long "yes" <> short 'y'
<> help "Skip confirmation prompt"
optGlobalDesc = switch
$ long "global" <> short 'g'
<> help "Remove for all users"
optPathsDesc = many $ argument str
$ metavar "PATH"
<> help "Directories to remove"
main :: IO ()
main = execParser parser >>= removePath
where
parser = info (helper <*> optionParser) $
fullDesc <> progDesc "Remove directories from your PATH"
removePath :: Options -> IO ()
removePath options = runExceptT doRemovePath >>= either ioError return
where
varName = optName options
pathsToRemove = optPaths options
forAllUsers = optGlobal options
skipPrompt = optYes options
emptyIfMissing e
| isDoesNotExistError e = return ""
| otherwise = throwE e
doRemovePath = do
removePathFrom WindowsEnv.CurrentUser
when forAllUsers $
removePathFrom WindowsEnv.AllUsers
removePathFrom profile = do
oldValue <- WindowsEnv.query profile varName `catchE` emptyIfMissing
let oldPaths = WindowsEnv.pathSplit oldValue
let newPaths = filter (flip notElem pathsToRemove) oldPaths
when (length oldPaths /= length newPaths) $ do
let newValue = WindowsEnv.pathJoin newPaths
let promptAnd = if skipPrompt
then withoutPrompt
else withPrompt $ oldNewMessage profile varName oldValue newValue
let engrave = WindowsEnv.engrave profile varName newValue
void $ promptAnd engrave
|
