ce5637498f
This drops the >>! and >>? with the nice low fixity. IfElse does have undocumented >>=>>! and >>=>>? operators, but I deem that too fishy. Anyway, using whenM and unlessM is easier; I sometimes mixed the operators up.
28 lines
824 B
Haskell
28 lines
824 B
Haskell
{- git-annex file copying
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-
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- Copyright 2010 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Utility.CopyFile (copyFileExternal) where
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import System.Directory (doesFileExist, removeFile)
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import Control.Monad.IfElse
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import Utility.SafeCommand
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import qualified Build.SysConfig as SysConfig
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{- The cp command is used, because I hate reinventing the wheel,
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- and because this allows easy access to features like cp --reflink. -}
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copyFileExternal :: FilePath -> FilePath -> IO Bool
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copyFileExternal src dest = do
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whenM (doesFileExist dest) $
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removeFile dest
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boolSystem "cp" [params, File src, File dest]
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where
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params
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| SysConfig.cp_reflink_auto = Params "--reflink=auto"
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| SysConfig.cp_a = Params "-a"
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| SysConfig.cp_p = Params "-p"
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| otherwise = Params ""
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