54 lines
1.6 KiB
Haskell
54 lines
1.6 KiB
Haskell
{-# LANGUAGE ScopedTypeVariables #-}
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--------------------------------------------------------------------------------
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-- | VirtualBox-specific functions
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module XMonad.Internal.Concurrent.VirtualBox
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( vmExists
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, vmInstanceConfig
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, qual
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) where
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import Control.Exception
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import Data.Internal.Dependency
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import Text.XML.Light
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import System.Directory
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import System.FilePath
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import XMonad.Internal.Shell
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vmExists :: String -> IO (Maybe Msg)
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vmExists vm = either (Just . Msg Error) (const Nothing) <$> vmInstanceConfig vm
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vmInstanceConfig :: String -> IO (Either String FilePath)
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vmInstanceConfig vmName = do
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either (return . Right) findInstance =<< vmDirectory
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where
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path = vmName </> (vmName ++ ".vbox")
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findInstance dir = do
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res <- findFile [dir] path
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return $ case res of
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Just p -> Right p
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Nothing -> Left $ "could not find VM instance: " ++ singleQuote vmName
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vmDirectory :: IO (Either String String)
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vmDirectory = do
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p <- vmConfig
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(s :: Either IOException String) <- try $ readFile p
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return $ case s of
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(Left _) -> Left "could not read VirtualBox config file"
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(Right x) -> maybe (Left "Could not parse VirtualBox config file") Right
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$ findDir =<< parseXMLDoc x
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where
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findDir e = findAttr (unqual "defaultMachineFolder")
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=<< findChild (qual e "SystemProperties")
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=<< findChild (qual e "Global") e
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qual :: Element -> String -> QName
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qual e n = (elName e) { qName = n }
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vmConfig :: IO FilePath
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vmConfig = getXdgDirectory XdgConfig "VirtualBox/VirtualBox.xml"
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