89 lines
3.0 KiB
Haskell
89 lines
3.0 KiB
Haskell
{-# LANGUAGE BangPatterns, CPP #-}
|
|
|
|
module Language.Haskell.GhcMod.ErrMsg (
|
|
LogReader
|
|
, setLogger
|
|
, handleErrMsg
|
|
) where
|
|
|
|
import Bag
|
|
import Control.Applicative
|
|
import Data.IORef
|
|
import Data.Maybe
|
|
import DynFlags
|
|
import ErrUtils
|
|
import GHC
|
|
import HscTypes
|
|
import Language.Haskell.GhcMod.Doc (showUnqualifiedPage)
|
|
import Language.Haskell.GhcMod.Types (LineSeparator(..))
|
|
import qualified Language.Haskell.GhcMod.Gap as Gap
|
|
import Outputable
|
|
import System.FilePath (normalise)
|
|
|
|
----------------------------------------------------------------
|
|
|
|
-- | A means to read the log.
|
|
type LogReader = IO [String]
|
|
|
|
----------------------------------------------------------------
|
|
|
|
setLogger :: Bool -> DynFlags -> LineSeparator -> IO (DynFlags, LogReader)
|
|
setLogger False df _ = return (newdf, undefined)
|
|
where
|
|
newdf = Gap.setLogAction df $ \_ _ _ _ _ -> return ()
|
|
setLogger True df ls = do
|
|
ref <- newIORef [] :: IO (IORef [String])
|
|
let newdf = Gap.setLogAction df $ appendLog ref
|
|
return (newdf, reverse <$> readIORef ref)
|
|
where
|
|
appendLog ref _ sev src _ msg = do
|
|
let !l = ppMsg src sev df ls msg
|
|
modifyIORef ref (l:)
|
|
|
|
----------------------------------------------------------------
|
|
|
|
handleErrMsg :: LineSeparator -> SourceError -> Ghc [String]
|
|
handleErrMsg ls err = do
|
|
dflag <- getSessionDynFlags
|
|
return . errBagToStrList dflag ls . srcErrorMessages $ err
|
|
|
|
errBagToStrList :: DynFlags -> LineSeparator -> Bag ErrMsg -> [String]
|
|
errBagToStrList dflag ls = map (ppErrMsg dflag ls) . reverse . bagToList
|
|
|
|
----------------------------------------------------------------
|
|
|
|
ppErrMsg :: DynFlags -> LineSeparator -> ErrMsg -> String
|
|
ppErrMsg dflag ls err = ppMsg spn SevError dflag ls msg ++ ext
|
|
where
|
|
spn = Gap.errorMsgSpan err
|
|
msg = errMsgShortDoc err
|
|
ext = showMsg dflag ls (errMsgExtraInfo err)
|
|
|
|
ppMsg :: SrcSpan -> Severity-> DynFlags -> LineSeparator -> SDoc -> String
|
|
ppMsg spn sev dflag ls@(LineSeparator lsep) msg = prefix ++ cts ++ lsep
|
|
where
|
|
cts = showMsg dflag ls msg
|
|
defaultPrefix
|
|
| dopt Opt_D_dump_splices dflag = ""
|
|
| otherwise = "Dummy:0:0:"
|
|
prefix = fromMaybe defaultPrefix $ do
|
|
(line,col,_,_) <- Gap.getSrcSpan spn
|
|
file <- normalise <$> Gap.getSrcFile spn
|
|
let severityCaption = Gap.showSeverityCaption sev
|
|
return $ file ++ ":" ++ show line ++ ":" ++ show col ++ ":" ++ severityCaption
|
|
|
|
----------------------------------------------------------------
|
|
|
|
showMsg :: DynFlags -> LineSeparator -> SDoc -> String
|
|
showMsg dflag (LineSeparator [s]) sdoc = replaceNull $ showUnqualifiedPage dflag sdoc
|
|
where
|
|
replaceNull :: String -> String
|
|
replaceNull [] = []
|
|
replaceNull ('\n':xs) = s : replaceNull xs
|
|
replaceNull (x:xs) = x : replaceNull xs
|
|
showMsg dflag (LineSeparator lsep) sdoc = replaceNull $ showUnqualifiedPage dflag sdoc
|
|
where
|
|
replaceNull [] = []
|
|
replaceNull ('\n':xs) = lsep ++ replaceNull xs
|
|
replaceNull (x:xs) = x : replaceNull xs
|