Use time instead of old-time and old-locale

Get rid of these deprecated libraries, as the new `time' library
provides a strict superset of the functionality of `old-time' and
`old-locale'.

XMonad/Actions/AfterDrag.hs

@@ -19,7 +19,8 @@ module XMonad.Actions.AfterDrag (
                 ifClick') where
 
 import XMonad
-import System.Time
+
+import Data.Time (NominalDiffTime, diffUTCTime, getCurrentTime)
 
 -- $usage
 -- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
@@ -63,9 +64,9 @@ ifClick'
   -> X ()   -- ^ The action to take if the dragging turned out to not be a click.
   -> X ()
 ifClick' ms click drag = do
-  start <- io $ getClockTime
+  start <- io getCurrentTime
   afterDrag $ do
-    stop <- io $ getClockTime
-    if diffClockTimes stop start <= noTimeDiff { tdPicosec = fromIntegral ms * 10^(9 :: Integer) }
+    stop <- io getCurrentTime
+    if diffUTCTime stop start <= (fromIntegral ms / 10^(3 :: Integer) :: NominalDiffTime)
       then click
       else drag

XMonad/Util/Loggers.hs

@@ -57,11 +57,10 @@ import XMonad.Util.NamedWindows (getName)
 import Control.Exception as E
 import Data.List (find, isPrefixOf, isSuffixOf)
 import Data.Maybe (fromMaybe)
+import Data.Time (defaultTimeLocale, formatTime, getCurrentTime)
 import System.Directory (getDirectoryContents)
-import System.IO
-import System.Locale
+import System.IO (hGetLine)
 import System.Process (runInteractiveCommand)
-import System.Time
 
 econst :: Monad m => a -> IOException -> m a
 econst = const . return
@@ -129,8 +128,7 @@ battery = logCmd "acpi | sed -r 's/.*?: (.*%).*/\\1/; s/[dD]ischarging, ([0-9]+%
 --   For more information see something like
 --   <http://www.cplusplus.com/reference/clibrary/ctime/strftime.html>.
 date :: String -> Logger
-date fmt = io $ do cal <- getClockTime >>= toCalendarTime
-                   return . Just $ formatCalendarTime defaultTimeLocale fmt cal
+date fmt = io $ Just . formatTime defaultTimeLocale fmt <$> getCurrentTime
 
 -- | Get the load average.  This assumes that you have a
 --   utility called @uptime@ and that you have @sed@
@@ -248,7 +246,7 @@ withScreen f n = do
   ss <- withWindowSet $ return . W.screens
   case find ((== n) . W.screen) ss of
     Just s  -> f s
-    Nothing -> pure $ Nothing
+    Nothing -> pure Nothing
 
 -- $format
 -- Combine logger formatting functions to make your

xmonad-contrib.cabal

@@ -52,8 +52,7 @@ library
                    containers >= 0.5 && < 0.7,
                    directory,
                    filepath,
-                   old-locale,
-                   old-time,
+                   time >= 1.8 && < 1.12,
                    process,
                    random,
                    mtl >= 1 && < 3,