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{-
- 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 (when)
import Data.List ((\\))
import Data.Maybe (fromJust, isJust)
import Options.Applicative
import qualified Environment
data Options = Options
{ optName :: String
, optYes :: Bool
, optGlobal :: Bool
, optPaths :: [String]
} deriving (Eq, Show)
options = 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 <*> options) $
fullDesc <> progDesc "Remove directories from your PATH"
removePath :: Options -> IO ()
removePath options = do
removePathFrom Environment.CurrentUser
when forAllUsers $ do
removePathFrom Environment.AllUsers
where
varName = optName options
pathsToRemove = optPaths options
forAllUsers = optGlobal options
removePathFrom env = do
oldValue <- Environment.query env varName
when (isJust oldValue) $ do
let oldPaths = Environment.pathSplit $ fromJust oldValue
let newPaths = oldPaths \\ pathsToRemove
when (length oldPaths /= length newPaths) $ do
let newValue = Environment.pathJoin newPaths
engrave env newValue
skipPrompt = optYes options
engrave env value = if skipPrompt
then Environment.engrave env varName value
else Environment.engravePrompt env varName value >> return ()
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