git-annex/Messages.hs
Joey Hess 26544de946 put in utf8 forcing workaround
Haskell's IO layer crashes on characters > 255 when in a non-unicode (latin1)
locale. Until Haskell gets better behavior, put in an admittedly ugly
workaround for that: git-annex forces utf8 output mode no matter what
locale is selected. So if you use a non-utf8 locale, your filenames with
characters > 127 will not be displayed as you'd expect. But at least it
won't crash.
2011-03-08 18:05:20 -04:00

75 lines
2 KiB
Haskell

{- git-annex output messages
-
- Copyright 2010 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Messages where
import Control.Monad.State (liftIO)
import System.IO
import Control.Monad (unless)
import Data.String.Utils
import qualified Codec.Binary.UTF8.String as UTF8
import Types
import qualified Annex
import qualified SysConfig
verbose :: Annex () -> Annex ()
verbose a = do
q <- Annex.getState Annex.quiet
unless q a
showSideAction :: String -> Annex ()
showSideAction s = verbose $ liftIO $ putStrLn $ "(" ++ s ++ ")"
showStart :: String -> String -> Annex ()
showStart command file = verbose $ do
liftIO $ putStr $ command ++ " " ++ filePathToString file ++ " "
liftIO $ hFlush stdout
showNote :: String -> Annex ()
showNote s = verbose $ do
liftIO $ putStr $ "(" ++ s ++ ") "
liftIO $ hFlush stdout
showProgress :: Annex ()
showProgress = verbose $ liftIO $ putStr "\n"
showLongNote :: String -> Annex ()
showLongNote s = verbose $ liftIO $ putStr $ "\n" ++ indent s
showEndOk :: Annex ()
showEndOk = verbose $ liftIO $ putStrLn "ok"
showEndFail :: Annex ()
showEndFail = verbose $ liftIO $ putStrLn "\nfailed"
showErr :: (Show a) => a -> Annex ()
showErr e = warning $ "git-annex: " ++ show e
warning :: String -> Annex ()
warning w = do
verbose $ liftIO $ putStr "\n"
liftIO $ hFlush stdout
liftIO $ hPutStrLn stderr $ indent w
indent :: String -> String
indent s = join "\n" $ map (\l -> " " ++ l) $ lines s
{- Prepares a filename for display. This is needed because on many
- platforms (eg, unix), FilePaths are internally stored in
- non-decoded form. -}
filePathToString :: FilePath -> String
filePathToString = if SysConfig.unicodefilepath then id else UTF8.decodeString
{- Workaround to avoid crashes displaying filenames containing
- characters > 255 in non-utf8 locales. Force encodings to utf-8,
- even though this may mean some characters in the encoding
- are mangled. -}
forceUtf8 :: IO ()
forceUtf8 = do
hSetEncoding stdout utf8
hSetEncoding stderr utf8