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module Hooks.LogPlugin (plugin) where
import GHC.Plugins
import GHC.Driver.Hooks
import GHC.Tc.Utils.Monad
import GHC.Utils.Logger
import GHC.Driver.Pipeline.Execute
import System.IO
plugin :: Plugin
plugin = defaultPlugin { driverPlugin = hooksP }
hooksP :: [CommandLineOption] -> HscEnv -> IO HscEnv
hooksP opts hsc_env = do
hSetBuffering stdout NoBuffering
let logger = hsc_logger hsc_env
logger' = pushLogHook logHook logger
hsc_env' = hsc_env { hsc_logger = logger' }
return hsc_env'
logHook :: LogAction -> LogAction
logHook action logFlags messageClass srcSpan msgDoc = do
putStrLn "Log hook called"
action logFlags messageClass srcSpan msgDoc
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