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{-# OPTIONS -cpp #-}
-- OPTIONS required for ghc-6.4.x compat, and must appear first
{-# LANGUAGE CPP #-}
{-# OPTIONS_GHC -cpp #-}
{-# OPTIONS_NHC98 -cpp #-}
{-# OPTIONS_JHC -fcpp #-}
{-# OPTIONS_HADDOCK hide #-}
module Distribution.Compat.CopyFile (
copyFile,
copyOrdinaryFile,
copyExecutableFile,
setFileOrdinary,
setFileExecutable,
setDirOrdinary,
) where
#ifdef __GLASGOW_HASKELL__
import Control.Monad
( when )
import Control.Exception
( bracket, bracketOnError )
import Distribution.Compat.Exception
( catchIO )
import Distribution.Compat.Exception
( throwIOIO )
import System.IO.Error
( ioeSetLocation )
import System.Directory
( renameFile, removeFile )
import Distribution.Compat.TempFile
( openBinaryTempFile )
import System.FilePath
( takeDirectory )
import System.IO
( openBinaryFile, IOMode(ReadMode), hClose, hGetBuf, hPutBuf )
import Foreign
( allocaBytes )
#endif /* __GLASGOW_HASKELL__ */
#ifndef mingw32_HOST_OS
import System.Posix.Internals (withFilePath)
import System.Posix.Types
( FileMode )
import System.Posix.Internals
( c_chmod )
import Foreign.C
( throwErrnoPathIfMinus1_ )
#endif /* mingw32_HOST_OS */
copyOrdinaryFile, copyExecutableFile :: FilePath -> FilePath -> IO ()
copyOrdinaryFile src dest = copyFile src dest >> setFileOrdinary dest
copyExecutableFile src dest = copyFile src dest >> setFileExecutable dest
setFileOrdinary, setFileExecutable, setDirOrdinary :: FilePath -> IO ()
#ifndef mingw32_HOST_OS
setFileOrdinary path = setFileMode path 0o644 -- file perms -rw-r--r--
setFileExecutable path = setFileMode path 0o755 -- file perms -rwxr-xr-x
setFileMode :: FilePath -> FileMode -> IO ()
setFileMode name m =
withFilePath name $ \s -> do
throwErrnoPathIfMinus1_ "setFileMode" name (c_chmod s m)
#else
setFileOrdinary _ = return ()
setFileExecutable _ = return ()
#endif
-- This happens to be true on Unix and currently on Windows too:
setDirOrdinary = setFileExecutable
copyFile :: FilePath -> FilePath -> IO ()
#ifdef __GLASGOW_HASKELL__
copyFile fromFPath toFPath =
copy
`catchIO` (\ioe -> throwIOIO (ioeSetLocation ioe "copyFile"))
where copy = bracket (openBinaryFile fromFPath ReadMode) hClose $ \hFrom ->
bracketOnError openTmp cleanTmp $ \(tmpFPath, hTmp) ->
do allocaBytes bufferSize $ copyContents hFrom hTmp
hClose hTmp
renameFile tmpFPath toFPath
openTmp = openBinaryTempFile (takeDirectory toFPath) ".copyFile.tmp"
cleanTmp (tmpFPath, hTmp) = do
hClose hTmp `catchIO` \_ -> return ()
removeFile tmpFPath `catchIO` \_ -> return ()
bufferSize = 4096
copyContents hFrom hTo buffer = do
count <- hGetBuf hFrom buffer bufferSize
when (count > 0) $ do
hPutBuf hTo buffer count
copyContents hFrom hTo buffer
#else
copyFile fromFPath toFPath = readFile fromFPath >>= writeFile toFPath
#endif
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