ghc-mod/Language/Haskell/GhcMod/Debug.hs
2014-03-27 16:35:41 +09:00

76 lines
2.5 KiB
Haskell

module Language.Haskell.GhcMod.Debug (debugInfo, debug, rootInfo, root) where
import Control.Applicative ((<$>))
import Control.Exception.IOChoice ((||>))
import Control.Monad (void)
import CoreMonad (liftIO)
import Data.List (intercalate)
import Data.Maybe (fromMaybe, isJust, fromJust)
import GHC (Ghc)
import Language.Haskell.GhcMod.CabalApi
import Language.Haskell.GhcMod.GHCApi
import Language.Haskell.GhcMod.Types
----------------------------------------------------------------
-- | Obtaining debug information.
debugInfo :: Options
-> Cradle
-> FilePath -- ^ A target file.
-> IO String
debugInfo opt cradle fileName = unlines <$> 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
void $ initializeFlagsWithCradle opt cradle gopts True
setTargetFiles [fileName]
return [
"Root directory: " ++ rootDir
, "Current directory: " ++ currentDir
, "Cabal file: " ++ cabalFile
, "GHC options: " ++ unwords gopts
, "Include directories: " ++ unwords incDir
, "Dependent packages: " ++ intercalate ", " (map fst pkgs)
]
where
currentDir = cradleCurrentDir cradle
mCabalFile = cradleCabalFile cradle
mCabalDir = cradleCabalDir cradle
rootDir = fromMaybe currentDir mCabalDir
cabal = isJust mCabalFile
cabalFile = fromMaybe "" mCabalFile
origGopts = ghcOpts opt
simpleCompilerOption = CompilerOptions origGopts [] []
fromCabalFile = parseCabalFile file >>= getCompilerOptions origGopts cradle
where
file = fromJust mCabalFile
----------------------------------------------------------------
-- | Obtaining root information.
rootInfo :: Options
-> Cradle
-> FilePath -- ^ A target file.
-> IO String
rootInfo opt cradle fileName = withGHC fileName (root opt cradle fileName)
-- | Obtaining root information.
root :: Options
-> Cradle
-> FilePath -- ^ A target file.
-> Ghc String
root _ cradle _ = return $ rootDir ++ "\n"
where
currentDir = cradleCurrentDir cradle
mCabalDir = cradleCabalDir cradle
rootDir = fromMaybe currentDir mCabalDir