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|
{- Win32-notify interface
-
- Copyright 2013 Joey Hess <joey@kitenet.net>
-
- License: BSD-2-clause
-}
module Utility.DirWatcher.Win32Notify where
import Common hiding (isDirectory)
import Utility.DirWatcher.Types
import System.Win32.Notify
import qualified Utility.PosixFiles as Files
watchDir :: FilePath -> (FilePath -> Bool) -> Bool -> WatchHooks -> IO WatchManager
watchDir dir ignored scanevents hooks = do
scan dir
wm <- initWatchManager
void $ watchDirectory wm dir True [Create, Delete, Modify, Move] dispatch
return wm
where
dispatch evt
| ignoredPath ignored (filePath evt) = noop
| otherwise = case evt of
(Deleted _ _)
| isDirectory evt -> runhook delDirHook Nothing
| otherwise -> runhook delHook Nothing
(Created _ _)
| isDirectory evt -> noop
| otherwise -> runhook addHook Nothing
(Modified _ _)
| isDirectory evt -> noop
{- Add hooks are run when a file is modified for
- compatability with INotify, which calls the add
- hook when a file is closed, and so tends to call
- both add and modify for file modifications. -}
| otherwise -> do
runhook addHook Nothing
runhook modifyHook Nothing
where
runhook h s = maybe noop (\a -> a (filePath evt) s) (h hooks)
scan d = unless (ignoredPath ignored d) $
mapM_ go =<< dirContentsRecursiveSkipping (const False) False d
where
go f
| ignoredPath ignored f = noop
| otherwise = do
ms <- getstatus f
case ms of
Nothing -> noop
Just s
| Files.isRegularFile s ->
when scanevents $
runhook addHook ms
| otherwise ->
noop
where
runhook h s = maybe noop (\a -> a f s) (h hooks)
getstatus = catchMaybeIO . getFileStatus
{- Check each component of the path to see if it's ignored. -}
ignoredPath :: (FilePath -> Bool) -> FilePath -> Bool
ignoredPath ignored = any ignored . map dropTrailingPathSeparator . splitPath
|
