1 {-# OPTIONS -cpp -fffi #-}
2 #if __GLASGOW_HASKELL__ < 603
7 -----------------------------------------------------------------------------
9 -- (c) The University of Glasgow, 2004
11 -- runghc program, for invoking from a #! line in a script. For example:
15 -- > main = putStrLn "hello!"
17 -- runghc accepts one flag:
19 -- -f <path> specify the path
21 -- -----------------------------------------------------------------------------
25 import System.Environment
32 import Compat.RawSystem ( rawSystem )
33 import Compat.Directory ( findExecutable )
35 import System.Cmd ( rawSystem )
36 import System.Directory ( findExecutable )
42 ('-':'f' : ghc) : args -> do
43 doIt (dropWhile isSpace ghc) args
45 mb_ghc <- findExecutable "ghc"
47 Nothing -> dieProg ("cannot find ghc")
48 Just ghc -> doIt ghc args
52 (ghc_args, rest) = break notArg args
55 [] -> dieProg "syntax: runghc [-f GHCPATH] [GHC-ARGS] FILE ARG..."
56 filename : prog_args -> do
57 res <- rawSystem ghc (
58 "-ignore-dot-ghci" : ghc_args ++
59 [ "-e","System.Environment.withProgName "++show filename++" (System.Environment.withArgs ["
60 ++ concat (intersperse "," (map show prog_args))
61 ++ "] (GHC.TopHandler.runIOFastExit (Main.main Prelude.>> (Prelude.return ()))))", filename])
62 -- runIOFastExit: makes exceptions raised by Main.main
63 -- behave in the same way as for a compiled program.
64 -- The "fast exit" part just calls exit() directly
65 -- instead of doing an orderly runtime shutdown,
66 -- otherwise the main GHCi thread will complain about
69 -- Why (main >> return ()) rather than just main? Because
70 -- otherwise GHCi by default tries to evaluate the result
71 -- of the IO in order to show it (see #1200).
74 notArg ('-':_) = False
77 dieProg :: String -> IO a
80 hPutStrLn stderr (p ++ ": " ++ msg)
81 exitWith (ExitFailure 1)