.ghci

:set +m

:set -package ghc

:module + System.Directory
:module + System.Environment
:module + System.IO
:module + Control.Monad
:module + Data.List

let llM :: IO String
    llM = do
      e <- System.Environment.getEnvironment
      case lookup "GHCI_LOAD" e of 
        Nothing -> return ""
        Just f -> do
          putStrLn $ "LOADING " ++ f
          return $ ":load " ++ f

let sourceGHCI :: String -> IO String
    sourceGHCI f = do
      b <- doesFileExist f
      when b $ putStrLn $ "SOURCING " ++ f
      if b
        then readFile f
        else return ""

let commands :: [IO String] -> IO String
    commands = liftM (intercalate "\n") . sequence

:def init (const $ commands [sourceGHCI ".extensions.ghci", sourceGHCI ".ghc_options.ghci"])
:def ll   (const $ commands [llM, sourceGHCI ".reload.ghci"])
:def rl   (const $ commands [return ":re", sourceGHCI ".reload.ghci"])
:init
:ll

:module - System.Directory
:module - System.Environment
:module - System.IO
:module - Control.Monad
:module - Data.List