import Monad (MonadPlus(..), liftM, liftM2, when)
import Char (isAlpha, isAlphaNum, isSpace, isDigit, toUpper, intToDigit, ord)
import List (intersperse, isSuffixOf)
-import IO (hPutStr, hPutStrLn, stderr)
+import IO (hPutStr, hPutStrLn, stderr, bracket_)
#if defined(mingw32_HOST_OS)
import Foreign
++ [cProgName]
++ ["-o", oProgName]
)
- removeFile cProgName
+ finallyRemove cProgName $ do
rawSystemL ("linking " ++ oProgName) beVerbose linker
( [f | LinkFlag f <- flags]
++ [oProgName]
++ ["-o", progName]
)
- removeFile oProgName
+ finallyRemove oProgName $ do
rawSystemWithStdOutL ("running " ++ execProgName) beVerbose execProgName [] outName
- removeFile progName
+ finallyRemove progName $ do
when needsH $ writeFile outHName $
"#ifndef "++includeGuard++"\n" ++
ExitFailure _ -> die $ action ++ " failed\ncommand was: " ++ cmdLine ++ "\n"
_ -> return ()
+
+-- delay the cleanup of generated files until the end; attempts to
+-- get around intermittent failure to delete files which has
+-- just been exec'ed by a sub-process (Win32 only.)
+finallyRemove :: FilePath -> IO a -> IO a
+finallyRemove fp act =
+ bracket_ (return fp)
+ (const $ noisyRemove fp)
+ act
+ where
+ noisyRemove fpath =
+ catch (removeFile fpath)
+ (\ e -> hPutStrLn stderr ("Failed to remove file " ++ fpath ++ "; error= " ++ show e))
onlyOne :: String -> IO a
onlyOne what = die ("Only one "++what++" may be specified\n")