diff options
Diffstat (limited to 'Utility/CopyFile.hs')
| -rw-r--r-- | Utility/CopyFile.hs | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/Utility/CopyFile.hs b/Utility/CopyFile.hs index 18290669d..bb0600aa9 100644 --- a/Utility/CopyFile.hs +++ b/Utility/CopyFile.hs @@ -1,11 +1,16 @@ -{- git-annex file copying +{- file copying - - - Copyright 2010,2012 Joey Hess <joey@kitenet.net> + - Copyright 2010-2013 Joey Hess <joey@kitenet.net> - - Licensed under the GNU GPL version 3 or higher. -} -module Utility.CopyFile (copyFileExternal) where +{-# LANGUAGE CPP #-} + +module Utility.CopyFile ( + copyFileExternal, + createLinkOrCopy +) where import Common import qualified Build.SysConfig as SysConfig @@ -23,3 +28,17 @@ copyFileExternal src dest = do , (SysConfig.cp_a, Param "-a") , (SysConfig.cp_p && not SysConfig.cp_a, Param "-p") ] + +{- Create a hard link if the filesystem allows it, and fall back to copying + - the file. -} +createLinkOrCopy :: FilePath -> FilePath -> IO Bool +#ifndef __WINDOWS__ +createLinkOrCopy src dest = go `catchIO` const fallback + where + go = do + createLink src dest + return True + fallback = copyFileExternal src dest +#else +createLinkOrCopy = copyFileExternal +#endif |