module Utility.UserInfo (
myHomeDir,
myUserName,
myUserGecos,
) where
import Utility.Env
import System.PosixCompat
import Control.Applicative
import Prelude
myHomeDir :: IO FilePath
myHomeDir = myVal env homeDirectory
where
#ifndef mingw32_HOST_OS
env = ["HOME"]
#else
env = ["USERPROFILE", "HOME"]
#endif
myUserName :: IO String
myUserName = myVal env userName
where
#ifndef mingw32_HOST_OS
env = ["USER", "LOGNAME"]
#else
env = ["USERNAME", "USER", "LOGNAME"]
#endif
myUserGecos :: IO (Maybe String)
#if defined(__ANDROID__) || defined(mingw32_HOST_OS)
myUserGecos = return Nothing
#else
myUserGecos = Just <$> myVal [] userGecos
#endif
myVal :: [String] -> (UserEntry -> String) -> IO String
myVal envvars extract = go envvars
where
#ifndef mingw32_HOST_OS
go [] = extract <$> (getUserEntryForID =<< getEffectiveUserID)
#else
go [] = extract <$> error ("environment not set: " ++ show envvars)
#endif
go (v:vs) = maybe (go vs) return =<< getEnv v