+-- Create a hierarchy of directories
+
+createDirectoryHierarchy :: FilePath -> IO ()
+createDirectoryHierarchy dir = do
+ b <- doesDirectoryExist dir
+ when (not b) $ do
+ createDirectoryHierarchy (directoryOf dir)
+ createDirectory dir
+
+-----------------------------------------------------------------------------
+-- Verify that the 'dirname' portion of a FilePath exists.
+--
+doesDirNameExist :: FilePath -> IO Bool
+doesDirNameExist fpath = doesDirectoryExist (directoryOf fpath)
+
+-----------------------------------------------------------------------------