import Prelude
-#include "../../includes/ghcconfig.h"
-
import System.Console.GetOpt
import qualified Control.Exception as Exception
import Data.Maybe
import System.Exit ( exitWith, ExitCode(..) )
import System.Environment ( getArgs, getProgName, getEnv )
import System.IO
-import System.IO.Error (try)
+import System.IO.Error (try, isDoesNotExistError)
import Data.List
import Control.Concurrent
#if __GLASGOW_HASKELL__ < 612
import System.Posix.Internals
-#if __GLASGOW_HASKELL__ >= 611
-import GHC.IO.Handle.FD (fdToHandle)
-#else
import GHC.Handle (fdToHandle)
#endif
-#endif
#ifdef mingw32_HOST_OS
import GHC.ConsoleHandler
do_cmd (RemovePackage p) = do
let file = location db </> display (installedPackageId p) <.> "conf"
when (verbosity > Normal) $ putStrLn ("removing " ++ file)
- removeFile file
+ removeFileSafe file
do_cmd (AddPackage p) = do
let file = location db </> display (installedPackageId p) <.> "conf"
when (verbosity > Normal) $ putStrLn ("writing " ++ file)
_ <- installHandler sigQUIT (Catch interrupt) Nothing
_ <- installHandler sigINT (Catch interrupt) Nothing
return ()
-#elif __GLASGOW_HASKELL__ >= 603
+#else
-- GHC 6.3+ has support for console events on Windows
-- NOTE: running GHCi under a bash shell for some reason requires
-- you to press Ctrl-Break rather than Ctrl-C to provoke
_ <- installHandler (Catch sig_handler)
return ()
-#else
- return () -- nothing
-#endif
-
-#if __GLASGOW_HASKELL__ <= 604
-isInfixOf :: (Eq a) => [a] -> [a] -> Bool
-isInfixOf needle haystack = any (isPrefixOf needle) (tails haystack)
#endif
#if mingw32_HOST_OS || mingw32_TARGET_OS
`catchIO` \err -> do
exists <- doesFileExist targetFile
if exists
- then do removeFile targetFile
+ then do removeFileSafe targetFile
-- Big fat hairy race condition
renameFile newFile targetFile
-- If the removeFile succeeds and the renameFile fails
renameFile newFile targetFile
#endif
`Exception.onException` do hClose newHandle
- removeFile newFile
+ removeFileSafe newFile
where
template = targetName <.> "tmp"
targetDir | null targetDir_ = "."
oflags = rw_flags .|. o_EXCL
-#if __GLASGOW_HASKELL__ < 611
withFilePath = withCString
-#endif
findTempName x = do
fd <- withFilePath filepath $ \ f ->
hSetEncoding h utf8
#endif
hGetContents h
+
+-- removeFileSave doesn't throw an exceptions, if the file is already deleted
+removeFileSafe :: FilePath -> IO ()
+removeFileSafe fn =
+ removeFile fn `catch` \ e ->
+ when (not $ isDoesNotExistError e) $ ioError e