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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 Data.Monoid ((<>))
import Data.Version (showVersion)
import System.IO.Error (ioError, isDoesNotExistError)
import Options.Applicative
import qualified Paths_windows_env as Meta
import qualified WindowsEnv
import Utils.Prompt
import Utils.PromptMessage
data Options = Options
{ optName :: WindowsEnv.Name
, optYes :: Bool
, optGlobal :: Bool
, optPaths :: [String]
} 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 <*> versioner <*> optionParser)
$ fullDesc
<> progDesc "Remove directories from your PATH"
versioner = infoOption (showVersion Meta.version)
$ long "version"
<> help "Show version"
<> hidden
removePath :: Options -> IO ()
removePath options = runExceptT doRemovePath >>= either ioError return
where
varName = optName options
pathsToRemove = optPaths options
forAllUsers = optGlobal options
skipPrompt = optYes options
ignoreMissing e
| isDoesNotExistError e = return ()
| otherwise = throwE e
doRemovePath = do
removePathFrom WindowsEnv.CurrentUser `catchE` ignoreMissing
when forAllUsers $
removePathFrom WindowsEnv.AllUsers `catchE` ignoreMissing
removePathFrom profile = do
oldValue <- WindowsEnv.query profile varName
let expandable = WindowsEnv.valueExpandable oldValue
let joined = WindowsEnv.valueString oldValue
let split = WindowsEnv.pathSplit joined
let remaining = filter (`notElem` pathsToRemove) split
when (length split /= length remaining) $ do
let newValue = WindowsEnv.Value expandable (WindowsEnv.pathJoin remaining)
promptAndEngrave profile oldValue newValue
promptAndEngrave profile oldValue newValue = do
let promptAnd = if skipPrompt
then withoutPrompt
else withPrompt $ oldNewMessage profile varName oldValue newValue
let engrave = WindowsEnv.engrave profile varName newValue
void $ promptAnd engrave
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