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|
{- generic directory watching interface
-
- Uses either inotify or kqueue to watch a directory (and subdirectories)
- for changes, and runs hooks for different sorts of events as they occur.
-
- Copyright 2012 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Utility.DirWatcher where
import Utility.Types.DirWatcher
#if WITH_INOTIFY
import qualified Utility.INotify as INotify
import qualified System.INotify as INotify
import Utility.ThreadScheduler
#endif
#if WITH_KQUEUE
import qualified Utility.Kqueue as Kqueue
#endif
type Pruner = FilePath -> Bool
canWatch :: Bool
#if (WITH_INOTIFY || WITH_KQUEUE)
canWatch = True
#else
#if defined linux_HOST_OS
#warning "Building without inotify support"
#endif
canWatch = False
#endif
#if WITH_INOTIFY
watchDir :: FilePath -> Pruner -> WatchHooks -> (IO () -> IO ()) -> IO ()
watchDir dir prune hooks runstartup = INotify.withINotify $ \i -> do
runstartup $ INotify.watchDir i dir prune hooks
waitForTermination -- Let the inotify thread run.
#else
#if WITH_KQUEUE
watchDir :: FilePath -> Pruner -> WatchHooks -> (IO Kqueue.Kqueue -> IO Kqueue.Kqueue) -> IO ()
watchDir dir ignored hooks runstartup = do
kq <- runstartup $ Kqueue.initKqueue dir ignored
Kqueue.runHooks kq hooks
#else
watchDir :: FilePath -> Pruner -> WatchHooks -> (IO () -> IO ()) -> IO ()
watchDir = undefined
#endif
#endif
|
