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diff --git a/Utility/Types/DirWatcher.hs b/Utility/Types/DirWatcher.hs
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+++ b/Utility/Types/DirWatcher.hs
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+{- generic directory watching types
+ -
+ - Copyright 2012 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+{-# LANGUAGE CPP #-}
+
+module Utility.Types.DirWatcher where
+
+import Common
+
+type Hook a = Maybe (a -> Maybe FileStatus -> IO ())
+
+data WatchHooks = WatchHooks
+	{ addHook :: Hook FilePath
+	, addSymlinkHook :: Hook FilePath
+	, delHook :: Hook FilePath
+	, delDirHook :: Hook FilePath
+	, errHook :: Hook String -- error message
+	}