111 lines
3.3 KiB
Haskell
111 lines
3.3 KiB
Haskell
{- git-annex progress output
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-
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- Copyright 2010-2015 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.Progress where
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import Common
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import Messages
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import Messages.Internal
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import Utility.Metered
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import Types
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import Types.Messages
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import Types.Key
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import System.Console.AsciiProgress
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import Control.Concurrent
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{- Shows a progress meter while performing a transfer of a key.
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- The action is passed a callback to use to update the meter. -}
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metered :: Maybe MeterUpdate -> Key -> (MeterUpdate -> Annex a) -> Annex a
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metered combinemeterupdate key a = go (keySize key)
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where
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go (Just size) = meteredBytes combinemeterupdate size a
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go _ = a (const noop)
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{- Use when the progress meter is only desired for parallel
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- mode; as when a command's own progress output is preferred. -}
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parallelMetered :: Maybe MeterUpdate -> Key -> (MeterUpdate -> Annex a) -> Annex a
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parallelMetered combinemeterupdate key a = withOutputType go
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where
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go (ParallelOutput _) = metered combinemeterupdate key a
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go _ = a (fromMaybe (const noop) combinemeterupdate)
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{- Shows a progress meter while performing an action on a given number
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- of bytes. -}
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meteredBytes :: Maybe MeterUpdate -> Integer -> (MeterUpdate -> Annex a) -> Annex a
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meteredBytes combinemeterupdate size a = withOutputType go
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where
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go QuietOutput = nometer
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go JSONOutput = nometer
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go _ = do
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showOutput
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liftIO $ putStrLn ""
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pg <- liftIO $ newProgressBar def
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{ pgWidth = 79
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, pgFormat = ":percent :bar ETA :eta"
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, pgTotal = fromInteger size
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}
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r <- a $ liftIO . pupdate pg
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-- may not be actually complete if the action failed,
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-- but this just clears the progress bar
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liftIO $ complete pg
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return r
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pupdate pg n = do
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let i = fromBytesProcessed n
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sofar <- stCompleted <$> getProgressStats pg
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when (i > sofar) $
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tickN pg (i - sofar)
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threadDelay 100
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maybe noop (\m -> m n) combinemeterupdate
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nometer = a (const noop)
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{- Progress dots. -}
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showProgressDots :: Annex ()
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showProgressDots = handleMessage q $
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flushed $ putStr "."
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{- Runs a command, that may output progress to either stdout or
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- stderr, as well as other messages.
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-
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- In quiet mode, the output is suppressed, except for error messages.
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-}
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progressCommand :: FilePath -> [CommandParam] -> Annex Bool
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progressCommand cmd params = progressCommandEnv cmd params Nothing
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progressCommandEnv :: FilePath -> [CommandParam] -> Maybe [(String, String)] -> Annex Bool
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progressCommandEnv cmd params environ = ifM commandProgressDisabled
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( do
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oh <- mkOutputHandler
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liftIO $ demeterCommandEnv oh cmd params environ
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, liftIO $ boolSystemEnv cmd params environ
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)
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mkOutputHandler :: Annex OutputHandler
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mkOutputHandler = OutputHandler
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<$> commandProgressDisabled
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<*> mkStderrEmitter
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mkStderrRelayer :: Annex (Handle -> IO ())
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mkStderrRelayer = do
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quiet <- commandProgressDisabled
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emitter <- mkStderrEmitter
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return $ \h -> avoidProgress quiet h emitter
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{- Generates an IO action that can be used to emit stderr.
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-
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- When a progress meter is displayed, this takes care to avoid
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- messing it up with interleaved stderr from a command.
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-}
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mkStderrEmitter :: Annex (String -> IO ())
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mkStderrEmitter = withOutputType go
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where
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go (ParallelOutput _) = return $ \s -> hPutStrLn stderr ("E: " ++ s)
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go _ = return (hPutStrLn stderr)
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