git-annex/Annex/Debug.hs
Joey Hess 2e9d4ac754
fix fastDebug to check if debugging is actually enabled
Had to add to AnnexRead an indication of whether debugging is enabled.

Could have just made setupConsole not install a debug output action that
outputs, and have enableDebug be what installs that, but then in the
common case where there is no debug selector, and so all debug output is
selected, it would run the debug output action every time, which entails
an IORef access. Which would make fastDebug too slow..
2021-04-06 16:28:37 -04:00

31 lines
791 B
Haskell

{- git-annex debugging
-
- Copyright 2021 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU AGPL version 3 or higher.
-}
module Annex.Debug (
DebugSelector(..),
DebugSource(..),
debug,
fastDebug,
configureDebug,
debugSelectorFromGitConfig,
parseDebugSelector,
) where
import Common
import qualified Annex
import Utility.Debug hiding (fastDebug)
import qualified Utility.Debug
import Annex.Debug.Utility
-- | This is faster than using debug, because the DebugSelector
-- is read from the Annex monad, which avoids any IORef access overhead
-- when debugging is not enabled.
fastDebug :: DebugSource -> String -> Annex.Annex ()
fastDebug src msg = do
rd <- Annex.getRead id
when (Annex.debugenabled rd) $
liftIO $ Utility.Debug.fastDebug (Annex.debugselector rd) src msg