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{- More control over touching a file.
-
- Copyright 2011 Joey Hess <id@joeyh.name>
-
- License: BSD-2-clause
-}
{-# LANGUAGE CPP #-}
module Utility.Touch (
TimeSpec(..),
touchBoth,
touch
) where
#if ! defined(mingw32_HOST_OS) && ! defined(__ANDROID__)
#if MIN_VERSION_unix(2,7,0)
import System.Posix.Files
import System.Posix.Types
newtype TimeSpec = TimeSpec EpochTime
{- Changes the access and modification times of an existing file.
Can follow symlinks, or not. Throws IO error on failure. -}
touchBoth :: FilePath -> TimeSpec -> TimeSpec -> Bool -> IO ()
touchBoth file (TimeSpec atime) (TimeSpec mtime) follow
| follow = setFileTimes file atime mtime
| otherwise = setSymbolicLinkTimesHiRes file (realToFrac atime) (realToFrac mtime)
touch :: FilePath -> TimeSpec -> Bool -> IO ()
touch file mtime = touchBoth file mtime mtime
#else
import Utility.Touch.Old
#endif
#else
import System.PosixCompat
newtype TimeSpec = TimeSpec EpochTime
{- Noop for Windows -}
touchBoth :: FilePath -> TimeSpec -> TimeSpec -> Bool -> IO ()
touchBoth _ _ _ _ = return ()
touch :: FilePath -> TimeSpec -> Bool -> IO ()
touch _ _ _ = return ()
#endif
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