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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 (when, void)
import Control.Monad.Trans.Except (catchE, runExceptT, throwE)
import Data.List (nub)
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.Path
import Utils.Prompt
import Utils.PromptMessage
data Options = Options
{ optName :: WindowsEnv.Name
, optYes :: Bool
, optGlobal :: Bool
, optPrepend :: Bool
, optPaths :: [String]
} deriving (Eq, Show)
optionParser :: Parser Options
optionParser = Options
<$> optNameDesc
<*> optYesDesc
<*> optGlobalDesc
<*> optPrependDesc
<*> 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 "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"
main :: IO ()
main = execParser parser >>= addPath
where
parser = info (helper <*> versioner <*> optionParser)
$ fullDesc
<> progDesc "Add directories to your PATH"
versioner = infoOption (showVersion Meta.version)
$ long "version"
<> help "Show version"
<> hidden
addPath :: Options -> IO ()
addPath options = runExceptT doAddPath >>= either ioError return
where
varName = optName options
pathsToAdd = nub $ optPaths options
forAllUsers = optGlobal options
skipPrompt = optYes options
profile
| forAllUsers = WindowsEnv.AllUsers
| otherwise = WindowsEnv.CurrentUser
prepend = optPrepend options
appendPaths old new
| prepend = new ++ old
| otherwise = old ++ new
emptyIfMissing e
| isDoesNotExistError e = return $ WindowsEnv.Value False ""
| otherwise = throwE e
doAddPath = do
newPaths <- pathExpandAll pathsToAdd
let newExpandable = pathAnyExpanded newPaths
srcValue <- WindowsEnv.query profile varName `catchE` emptyIfMissing
let srcExpandable = WindowsEnv.valueExpandable srcValue
let destExpandable = newExpandable || srcExpandable
srcPaths <- pathExpandValue srcValue
{ WindowsEnv.valueExpandable = destExpandable }
let destPaths = appendPaths srcPaths $ filter (`notElem` srcPaths) newPaths
let destPathsJoined = WindowsEnv.pathJoin $ map pathOriginal destPaths
let destValue = WindowsEnv.Value destExpandable destPathsJoined
when (srcValue /= destValue) $ promptAndEngrave srcValue destValue
promptAndEngrave 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
|
