ghc-mod/Language/Haskell/GhcMod/Debug.hs
2013-09-20 17:15:41 +09:00

57 lines
1.8 KiB
Haskell

module Language.Haskell.GhcMod.Debug (debugInfo, debug) where
import Control.Applicative
import Control.Exception.IOChoice
import Control.Monad
import Data.List (intercalate)
import Data.Maybe
import GHC
import GhcMonad (liftIO)
import Language.Haskell.GhcMod.CabalApi
import Language.Haskell.GhcMod.GHCApi
import Language.Haskell.GhcMod.Types
import Prelude
----------------------------------------------------------------
-- | Obtaining debug information.
debugInfo :: Options
-> Cradle
-> FilePath -- ^ A target file.
-> IO String
debugInfo opt cradle fileName = unlines <$> withGHC fileName (debug opt cradle fileName)
-- | Obtaining debug information.
debug :: Options
-> Cradle
-> FilePath -- ^ A target file.
-> Ghc [String]
debug opt cradle fileName = do
CompilerOptions gopts incDir pkgs <-
if cabal then
liftIO (fromCabalFile ||> return simpleCompilerOption)
else
return simpleCompilerOption
[fast] <- do
void $ initializeFlagsWithCradle opt cradle gopts True
setTargetFiles [fileName]
pure . canCheckFast <$> depanal [] False
return [
"Current directory: " ++ currentDir
, "Cabal file: " ++ cabalFile
, "GHC options: " ++ unwords gopts
, "Include directories: " ++ unwords incDir
, "Dependent packages: " ++ intercalate ", " pkgs
, "Fast check: " ++ if fast then "Yes" else "No"
]
where
currentDir = cradleCurrentDir cradle
mCabalFile = cradleCabalFile cradle
cabal = isJust mCabalFile
cabalFile = fromMaybe "" mCabalFile
origGopts = ghcOpts opt
simpleCompilerOption = CompilerOptions origGopts [] []
fromCabalFile = parseCabalFile file >>= getCompilerOptions origGopts cradle
where
file = fromJust mCabalFile