git-annex/Messages/Internal.hs

30 lines
669 B
Haskell

{- git-annex output messages
-
- Copyright 2010-2014 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Messages.Internal where
import Common
import Types
import Types.Messages
import qualified Annex
handleMessage :: IO () -> IO () -> Annex ()
handleMessage json normal = withOutputType go
where
go NormalOutput = liftIO normal
go QuietOutput = q
go ProgressOutput = q
go JSONOutput = liftIO $ flushed json
q :: Monad m => m ()
q = noop
flushed :: IO () -> IO ()
flushed a = a >> hFlush stdout
withOutputType :: (OutputType -> Annex a) -> Annex a
withOutputType a = outputType <$> Annex.getState Annex.output >>= a