81 lines
2.5 KiB
Haskell
81 lines
2.5 KiB
Haskell
{- git-annex output messages, including concurrent output to display regions
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-
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- Copyright 2010-2018 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Messages.Internal where
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import Common
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import Annex
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import Types.Messages
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import Messages.Concurrent
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import qualified Messages.JSON as JSON
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import Messages.JSON (JSONBuilder)
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withMessageState :: (MessageState -> Annex a) -> Annex a
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withMessageState a = Annex.getState Annex.output >>= a
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outputMessage :: JSONBuilder -> String -> Annex ()
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outputMessage = outputMessage' bufferJSON
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outputMessage' :: (JSONBuilder -> MessageState -> Annex Bool) -> JSONBuilder -> String -> Annex ()
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outputMessage' jsonoutputter jsonbuilder msg = withMessageState $ \s -> case outputType s of
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NormalOutput
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| concurrentOutputEnabled s -> concurrentMessage s False msg q
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| otherwise -> liftIO $ flushed $ putStr msg
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JSONOutput _ -> void $ jsonoutputter jsonbuilder s
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QuietOutput -> q
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-- Buffer changes to JSON until end is reached and then emit it.
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bufferJSON :: JSONBuilder -> MessageState -> Annex Bool
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bufferJSON jsonbuilder s = case outputType s of
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JSONOutput jsonoptions
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| endjson -> do
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Annex.changeState $ \st ->
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st { Annex.output = s { jsonBuffer = Nothing } }
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maybe noop (liftIO . flushed . JSON.emit . JSON.finalize jsonoptions) json
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return True
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| otherwise -> do
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Annex.changeState $ \st ->
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st { Annex.output = s { jsonBuffer = json } }
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return True
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_ -> return False
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where
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(json, endjson) = case jsonbuilder i of
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Nothing -> (jsonBuffer s, False)
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(Just (j, e)) -> (Just j, e)
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i = case jsonBuffer s of
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Nothing -> Nothing
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Just b -> Just (b, False)
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-- Immediately output JSON.
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outputJSON :: JSONBuilder -> MessageState -> Annex Bool
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outputJSON jsonbuilder s = case outputType s of
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JSONOutput _ -> do
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maybe noop (liftIO . flushed . JSON.emit)
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(fst <$> jsonbuilder Nothing)
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return True
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_ -> return False
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outputError :: String -> Annex ()
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outputError msg = withMessageState $ \s -> case (outputType s, jsonBuffer s) of
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(JSONOutput jsonoptions, Just jb) | jsonErrorMessages jsonoptions ->
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let jb' = Just (JSON.addErrorMessage [msg] jb)
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in Annex.changeState $ \st ->
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st { Annex.output = s { jsonBuffer = jb' } }
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_
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| concurrentOutputEnabled s -> concurrentMessage s True msg go
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| otherwise -> go
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where
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go = liftIO $ do
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hFlush stdout
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hPutStr stderr msg
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hFlush stderr
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q :: Monad m => m ()
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q = noop
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flushed :: IO () -> IO ()
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flushed a = a >> hFlush stdout
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