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