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{- git-annex progress output
-
- Copyright 2010-2015 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Messages.Progress where
import Common
import Messages
import Utility.Metered
import Types
import Types.Messages
import Types.Key
import qualified Messages.JSON as JSON
#ifdef WITH_CONCURRENTOUTPUT
import Messages.Concurrent
import qualified System.Console.Regions as Regions
import qualified System.Console.Concurrent as Console
#endif
{- Shows a progress meter while performing a transfer of a key.
- The action is passed a callback to use to update the meter. -}
metered :: Maybe MeterUpdate -> Key -> (MeterUpdate -> Annex a) -> Annex a
metered othermeter key a = withMessageState $ go (keySize key)
where
go _ (MessageState { outputType = QuietOutput }) = nometer
go (msize) (MessageState { outputType = NormalOutput, concurrentOutputEnabled = False }) = do
showOutput
meter <- liftIO $ mkMeter msize bandwidthMeter $
displayMeterHandle stdout
m <- liftIO $ rateLimitMeterUpdate 0.1 msize $
updateMeter meter
r <- a (combinemeter m)
liftIO $ clearMeterHandle meter stdout
return r
go (msize) (MessageState { outputType = NormalOutput, concurrentOutputEnabled = True }) =
#if WITH_CONCURRENTOUTPUT
withProgressRegion $ \r -> do
meter <- liftIO $ mkMeter msize bandwidthMeter $ \_ s ->
Regions.setConsoleRegion r ('\n' : s)
m <- liftIO $ rateLimitMeterUpdate 0.1 msize $
updateMeter meter
a (combinemeter m)
#else
nometer
#endif
go _ (MessageState { outputType = JSONOutput False }) = nometer
go msize (MessageState { outputType = JSONOutput True }) = do
buf <- withMessageState $ return . jsonBuffer
m <- liftIO $ rateLimitMeterUpdate 0.1 msize $
JSON.progress buf msize
a (combinemeter m)
nometer = a $ combinemeter (const noop)
combinemeter m = case othermeter of
Nothing -> m
Just om -> combineMeterUpdate m om
{- Use when the command's own progress output is preferred.
- The command's output will be suppressed and git-annex's progress meter
- used for concurrent output, and json progress. -}
commandMetered :: Maybe MeterUpdate -> Key -> (MeterUpdate -> Annex a) -> Annex a
commandMetered combinemeterupdate key a =
withMessageState $ \s -> if needOutputMeter s
then metered combinemeterupdate key a
else a (fromMaybe nullMeterUpdate combinemeterupdate)
{- Poll file size to display meter, but only when concurrent output or
- json progress needs the information. -}
meteredFile :: FilePath -> Maybe MeterUpdate -> Key -> Annex a -> Annex a
meteredFile file combinemeterupdate key a =
withMessageState $ \s -> if needOutputMeter s
then metered combinemeterupdate key $ \p ->
watchFileSize file p a
else a
needOutputMeter :: MessageState -> Bool
needOutputMeter s = case outputType s of
JSONOutput True -> True
NormalOutput | concurrentOutputEnabled s -> True
_ -> False
{- Progress dots. -}
showProgressDots :: Annex ()
showProgressDots = outputMessage JSON.none "."
{- Runs a command, that may output progress to either stdout or
- stderr, as well as other messages.
-
- In quiet mode, the output is suppressed, except for error messages.
-}
progressCommand :: FilePath -> [CommandParam] -> Annex Bool
progressCommand cmd params = progressCommandEnv cmd params Nothing
progressCommandEnv :: FilePath -> [CommandParam] -> Maybe [(String, String)] -> Annex Bool
progressCommandEnv cmd params environ = ifM commandProgressDisabled
( do
oh <- mkOutputHandler
liftIO $ demeterCommandEnv oh cmd params environ
, liftIO $ boolSystemEnv cmd params environ
)
mkOutputHandler :: Annex OutputHandler
mkOutputHandler = OutputHandler
<$> commandProgressDisabled
<*> mkStderrEmitter
mkStderrRelayer :: Annex (Handle -> IO ())
mkStderrRelayer = do
quiet <- commandProgressDisabled
emitter <- mkStderrEmitter
return $ \h -> avoidProgress quiet h emitter
{- Generates an IO action that can be used to emit stderr.
-
- When a progress meter is displayed, this takes care to avoid
- messing it up with interleaved stderr from a command.
-}
mkStderrEmitter :: Annex (String -> IO ())
mkStderrEmitter = withMessageState go
where
#ifdef WITH_CONCURRENTOUTPUT
go s | concurrentOutputEnabled s = return Console.errorConcurrent
#endif
go _ = return (hPutStrLn stderr)
|
