git-annex/CopyFile.hs
Joey Hess c91929f693 add whenM and unlessM
Just more golfing.. I am pretty sure something in a library somewhere can
do this, but I have been unable to find it.
2011-05-17 03:13:11 -04:00

29 lines
760 B
Haskell

{- git-annex file copying
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module CopyFile (copyFile) where
import System.Directory (doesFileExist, removeFile)
import Utility
import qualified SysConfig
{- The cp command is used, because I hate reinventing the wheel,
- and because this allows easy access to features like cp --reflink. -}
copyFile :: FilePath -> FilePath -> IO Bool
copyFile src dest = do
whenM (doesFileExist dest) $
removeFile dest
boolSystem "cp" [params, File src, File dest]
where
params = if SysConfig.cp_reflink_auto
then Params "--reflink=auto"
else if SysConfig.cp_a
then Params "-a"
else if SysConfig.cp_p
then Params "-p"
else Params ""