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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 (void, when)
import Data.List ((\\))
import Data.Maybe (fromJust, isJust)
import Options.Applicative
import qualified Windows.Environment as Env
import Prompt
import PromptMessage
data Options = Options
{ optName :: Env.VarName
, optYes :: Bool
, optGlobal :: Bool
, optPaths :: [Env.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 = do
removePathFrom Env.CurrentUser
when forAllUsers $
removePathFrom Env.AllUsers
where
varName = optName options
pathsToRemove = optPaths options
forAllUsers = optGlobal options
skipPrompt = optYes options
removePathFrom profile = do
oldValue <- Env.query profile varName
when (isJust oldValue) $ do
let oldPaths = Env.pathSplit $ fromJust oldValue
let newPaths = oldPaths \\ pathsToRemove
when (length oldPaths /= length newPaths) $ do
let newValue = Env.pathJoin newPaths
let promptAnd = if skipPrompt
then withoutPrompt
else withPrompt $ engraveMessage profile varName oldValue newValue
let engrave = Env.engrave profile varName newValue
void $ promptAnd engrave
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