Revert "Fix support for older GHCs"

This reverts commit 21dd1718c0.
This commit is contained in:
Julian Ospald 2019-12-30 16:35:42 +01:00
parent 7db7a9402f
commit 3529ec2a15
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2 changed files with 3 additions and 91 deletions

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@ -41,14 +41,13 @@ library
, deepseq
, exceptions
, hspec
, simple-sendfile >= 0.2.24
, streamly >= 0.7
, unix >= 2.5
, unix-bytestring
, utf8-string
, word8
if impl(ghc >= 8.2)
build-depends: streamly >= 0.7
else
build-depends: simple-sendfile >= 0.2.24
test-suite doctests-hpath
if os(windows)

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@ -154,10 +154,6 @@ import Foreign.C.Error
, eNOTEMPTY
, eXDEV
, getErrno
#if __GLASGOW_HASKELL__ < 802
, eINVAL
, eNOSYS
#endif
)
import Foreign.C.Types
(
@ -179,18 +175,10 @@ import HPath
import HPath.Internal
import HPath.IO.Errors
import Prelude hiding (appendFile, readFile, writeFile)
#if __GLASGOW_HASKELL__ >= 802
import qualified Streamly.FileSystem.Handle as FH
import qualified Streamly.Internal.FileSystem.Handle as IFH
import qualified Streamly.Prelude as S
import qualified System.IO as SIO
#else
import System.Linux.Sendfile
(
sendfileFd
, FileRange(..)
)
#endif
import System.IO.Error
(
catchIOError
@ -503,14 +491,11 @@ recreateSymlink symsource@(MkPath symsourceBS) newsym@(MkPath newsymBS) cm
--
-- Notes:
--
-- - on GHC < 8.2: calls `sendfile` and possibly `read`/`write` as fallback
-- - on GHC >= 8.2: uses streamly for file copying
-- - may call `getcwd` in Overwrite mode (if destination is a relative path)
copyFile :: Path b1 -- ^ source file
-> Path b2 -- ^ destination file
-> CopyMode
-> IO ()
#if __GLASGOW_HASKELL__ >= 802
copyFile fp@(MkPath from) tp@(MkPath to) cm = do
throwSameFile fp tp
bracket (do
@ -541,78 +526,6 @@ copyFile fp@(MkPath from) tp@(MkPath to) cm = do
streamlyCopy (fH, tH)
where
streamlyCopy (fH, tH) = S.fold (FH.writeChunks tH) $ IFH.toChunksWithBufferOf (256*1024) fH
#else
copyFile from to cm = do
throwSameFile from to
case cm of
Strict -> _copyFile [SPDF.oNofollow]
[SPDF.oNofollow, SPDF.oExcl]
from to
Overwrite ->
catchIOError (_copyFile [SPDF.oNofollow]
[SPDF.oNofollow, SPDF.oTrunc]
from to) $ \e ->
case ioeGetErrorType e of
-- if the destination file is not writable, we need to
-- figure out if we can still copy by deleting it first
PermissionDenied -> do
exists <- doesFileExist to
writable <- toAbs to >>= isWritable
if (exists && writable)
then deleteFile to >> copyFile from to Strict
else ioError e
_ -> ioError e
_copyFile :: [SPDF.Flags]
-> [SPDF.Flags]
-> Path b1 -- ^ source file
-> Path b2 -- ^ destination file
-> IO ()
_copyFile sflags dflags (MkPath fromBS) to@(MkPath toBS)
=
-- from sendfile(2) manpage:
-- Applications may wish to fall back to read(2)/write(2) in
-- the case where sendfile() fails with EINVAL or ENOSYS.
catchErrno [eINVAL, eNOSYS]
(sendFileCopy fromBS toBS)
(void $ readWriteCopy fromBS toBS)
where
copyWith copyAction source dest =
bracket (openFd source SPI.ReadOnly sflags Nothing)
SPI.closeFd
$ \sfd -> do
fileM <- System.Posix.Files.ByteString.fileMode
<$> getFdStatus sfd
bracketeer (openFd dest SPI.WriteOnly
dflags $ Just fileM)
SPI.closeFd
(\fd -> SPI.closeFd fd >> deleteFile to)
$ \dfd -> copyAction sfd dfd
-- this is low-level stuff utilizing sendfile(2) for speed
sendFileCopy :: ByteString -> ByteString -> IO ()
sendFileCopy = copyWith
(\sfd dfd -> sendfileFd dfd sfd EntireFile $ return ())
-- low-level copy operation utilizing read(2)/write(2)
-- in case `sendFileCopy` fails/is unsupported
readWriteCopy :: ByteString -> ByteString -> IO Int
readWriteCopy = copyWith
(\sfd dfd -> allocaBytes (fromIntegral bufSize)
$ \buf -> write' sfd dfd buf 0)
where
bufSize :: CSize
bufSize = 8192
write' :: Fd -> Fd -> Ptr Word8 -> Int -> IO Int
write' sfd dfd buf totalsize = do
size <- SPB.fdReadBuf sfd buf bufSize
if size == 0
then return $ fromIntegral totalsize
else do rsize <- SPB.fdWriteBuf dfd buf size
when (rsize /= size) (ioError $ userError
"wrong size!")
write' sfd dfd buf (totalsize + fromIntegral size)
#endif
-- |Copies a regular file, directory or symbolic link. In case of a
-- symbolic link it is just recreated, even if it points to a directory.