ghc-mod/System/Directory/ModTime.hs

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-- ghc-mod: Making Haskell development *more* fun
-- Copyright (C) 2015 Daniel Gröber <dxld ÄT darkboxed DOT org>
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
{-# LANGUAGE CPP, GeneralizedNewtypeDeriving #-}
module System.Directory.ModTime where
import Control.Applicative
import Control.DeepSeq
import Data.Binary
#if MIN_VERSION_directory(1,2,0)
import Data.Time (UTCTime(..), Day(..), getCurrentTime)
#else
import System.Time (ClockTime(..), getClockTime)
#endif
import System.Directory
import Prelude
#if MIN_VERSION_directory(1,2,0)
newtype ModTime = ModTime UTCTime
deriving (Eq, Ord, NFData)
getCurrentModTime = ModTime <$> getCurrentTime
instance Binary ModTime where
put (ModTime (UTCTime (ModifiedJulianDay day) difftime)) =
put day >> put (toRational difftime)
get =
ModTime <$> (UTCTime <$> (ModifiedJulianDay <$> get) <*> (fromRational <$> get))
#else
newtype ModTime = ModTime ClockTime
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deriving (Eq, Ord)
getCurrentModTime = ModTime <$> getClockTime
instance Binary ModTime where
put (ModTime (TOD s ps)) =
put s >> put ps
get =
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ModTime <$> (TOD <$> get <*> get)
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instance NFData ModTime where
rnf (ModTime (TOD s ps)) =
s `seq` ps `seq` (ModTime $! TOD s ps) `seq` ()
#endif
getCurrentModTime :: IO ModTime
getModTime :: FilePath -> IO ModTime
getModTime f = ModTime <$> getModificationTime f