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module GHCApi (
withGHC
, withGHCDummyFile
, initializeFlags
, initializeFlagsWithCradle
, setTargetFile
, getDynamicFlags
, checkSlowAndSet
) where
import CabalApi
import Control.Applicative
import Control.Exception
import Control.Monad
import CoreMonad
import Data.Maybe (isJust)
import DynFlags
import ErrMsg
import Exception
import GHC
import GHC.Paths (libdir)
import System.Exit
import System.IO
import Types
----------------------------------------------------------------
withGHCDummyFile :: Alternative m => Ghc (m a) -> IO (m a)
withGHCDummyFile = withGHC "Dummy"
withGHC :: Alternative m => FilePath -> Ghc (m a) -> IO (m a)
withGHC file body = ghandle ignore $ runGhc (Just libdir) $ do
dflags <- getSessionDynFlags
defaultCleanupHandler dflags body
where
ignore :: Alternative m => SomeException -> IO (m a)
ignore e = do
hPutStr stderr $ file ++ ":0:0:Error:"
hPrint stderr e
exitSuccess
----------------------------------------------------------------
importDirs :: [IncludeDir]
importDirs = [".","..","../..","../../..","../../../..","../../../../.."]
initializeFlagsWithCradle :: Options -> Cradle -> [GHCOption] -> Bool -> Ghc LogReader
initializeFlagsWithCradle opt cradle ghcOptions logging
| cabal = do
(gopts,idirs,depPkgs) <- liftIO $ fromCabalFile ghcOptions cradle
initSession opt gopts idirs (Just depPkgs) logging
| otherwise =
initSession opt ghcOptions importDirs Nothing logging
where
cabal = isJust $ cradleCabalFile cradle
----------------------------------------------------------------
initSession :: Options
-> [GHCOption]
-> [IncludeDir]
-> Maybe [Package]
-> Bool
-> Ghc LogReader
initSession opt cmdOpts idirs mDepPkgs logging = do
dflags0 <- getSessionDynFlags
(dflags1,readLog) <- setupDynamicFlags dflags0
_ <- setSessionDynFlags dflags1
return readLog
where
setupDynamicFlags df0 = do
df1 <- modifyFlagsWithOpts df0 cmdOpts
let fast = True
let df2 = modifyFlags df1 idirs mDepPkgs fast (expandSplice opt)
df3 <- modifyFlagsWithOpts df2 $ ghcOpts opt
liftIO $ setLogger logging df3
----------------------------------------------------------------
initializeFlags :: Options -> Ghc ()
initializeFlags opt = do
dflags0 <- getSessionDynFlags
dflags1 <- modifyFlagsWithOpts dflags0 $ ghcOpts opt
void $ setSessionDynFlags dflags1
----------------------------------------------------------------
-- FIXME removing Options
modifyFlags :: DynFlags -> [IncludeDir] -> Maybe [Package] -> Bool -> Bool -> DynFlags
modifyFlags d0 idirs mDepPkgs fast splice
| splice = setSplice d3
| otherwise = d3
where
d1 = d0 { importPaths = idirs }
d2 = setFastOrNot d1 fast
d3 = maybe d2 (addDevPkgs d2) mDepPkgs
setSplice :: DynFlags -> DynFlags
setSplice dflag = dopt_set dflag Opt_D_dump_splices
addDevPkgs :: DynFlags -> [Package] -> DynFlags
addDevPkgs df pkgs = df''
where
df' = dopt_set df Opt_HideAllPackages
df'' = df' {
packageFlags = map ExposePackage pkgs ++ packageFlags df
}
----------------------------------------------------------------
setFastOrNot :: DynFlags -> Bool -> DynFlags
setFastOrNot dflags False = dflags {
ghcLink = LinkInMemory
, hscTarget = HscInterpreted
}
setFastOrNot dflags True = dflags {
ghcLink = NoLink
, hscTarget = HscNothing
}
setSlowDynFlags :: Ghc ()
setSlowDynFlags = (flip setFastOrNot False <$> getSessionDynFlags)
>>= void . setSessionDynFlags
-- To check TH, a session module graph is necessary.
-- "load" sets a session module graph using "depanal".
-- But we have to set "-fno-code" to DynFlags before "load".
-- So, this is necessary redundancy.
checkSlowAndSet :: Ghc ()
checkSlowAndSet = do
slow <- needsTemplateHaskell <$> depanal [] False
when slow setSlowDynFlags
----------------------------------------------------------------
modifyFlagsWithOpts :: DynFlags -> [String] -> Ghc DynFlags
modifyFlagsWithOpts dflags cmdOpts =
tfst <$> parseDynamicFlags dflags (map noLoc cmdOpts)
where
tfst (a,_,_) = a
----------------------------------------------------------------
setTargetFile :: (GhcMonad m) => String -> m ()
setTargetFile file = do
target <- guessTarget file Nothing
setTargets [target]
----------------------------------------------------------------
getDynamicFlags :: IO DynFlags
getDynamicFlags = runGhc (Just libdir) getSessionDynFlags