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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.
-}
module Messages.Progress where
import Common
import Messages
import Messages.Internal
import Utility.Metered
import Types
import Types.Messages
import Types.Key
import System.Console.AsciiProgress
import qualified System.Console.Terminal.Size as Terminal
import Control.Concurrent
{- 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 -> AssociatedFile -> (MeterUpdate -> Annex a) -> Annex a
metered combinemeterupdate key af a = case keySize key of
Nothing -> nometer
Just size -> withOutputType (go $ fromInteger size)
where
go _ QuietOutput = nometer
go _ JSONOutput = nometer
go size _ = do
showOutput
liftIO $ putStrLn ""
cols <- liftIO $ maybe 79 Terminal.width <$> Terminal.size
let desc = truncatepretty cols $ fromMaybe (key2file key) af
result <- liftIO newEmptyMVar
pg <- liftIO $ newProgressBar def
{ pgWidth = cols
, pgFormat = desc ++ " :percent :bar ETA :eta"
, pgTotal = size
, pgOnCompletion = do
ok <- takeMVar result
putStrLn $ desc ++ " " ++
if ok then "ok" else "failed"
}
r <- a $ liftIO . pupdate pg
liftIO $ do
-- See if the progress bar is complete or not.
sofar <- stCompleted <$> getProgressStats pg
putMVar result (sofar >= size)
-- May not be actually complete if the action failed,
-- but this just clears the progress bar.
complete pg
return r
pupdate pg n = do
let i = fromBytesProcessed n
sofar <- stCompleted <$> getProgressStats pg
when (i > sofar) $
tickN pg (i - sofar)
threadDelay 100
maybe noop (\m -> m n) combinemeterupdate
nometer = a (const noop)
truncatepretty n s
| length s > n = take (n-2) s ++ ".."
| otherwise = s
{- Use when the progress meter is only desired for parallel
- mode; as when a command's own progress output is preferred. -}
parallelMetered :: Maybe MeterUpdate -> Key -> AssociatedFile -> (MeterUpdate -> Annex a) -> Annex a
parallelMetered combinemeterupdate key af a = withOutputType go
where
go (ParallelOutput _) = metered combinemeterupdate key af a
go _ = a (fromMaybe (const noop) combinemeterupdate)
{- Progress dots. -}
showProgressDots :: Annex ()
showProgressDots = handleMessage q $
flushed $ putStr "."
{- 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 = withOutputType go
where
go (ParallelOutput _) = return $ \s -> hPutStrLn stderr ("E: " ++ s)
go _ = return (hPutStrLn stderr)
|
