122 lines
3.8 KiB
Haskell
122 lines
3.8 KiB
Haskell
{-# LANGUAGE CPP #-}
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module Language.Haskell.GhcMod.DynFlags where
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import Control.Applicative ((<$>))
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import Control.Monad (void)
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import GHC (DynFlags(..), GhcMode(..), GhcLink(..), HscTarget(..))
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import qualified GHC as G
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import GHC.Paths (libdir)
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import GhcMonad
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import qualified Language.Haskell.GhcMod.Gap as Gap
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import Language.Haskell.GhcMod.Types
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import System.IO.Unsafe (unsafePerformIO)
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data Build = CabalPkg | SingleFile deriving Eq
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setEmptyLogger :: DynFlags -> DynFlags
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setEmptyLogger df = Gap.setLogAction df $ \_ _ _ _ _ -> return ()
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-- Fast
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-- Friendly to foreign export
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-- Not friendly to Template Haskell
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-- Uses small memory
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setModeSimple :: DynFlags -> DynFlags
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setModeSimple df = df {
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ghcMode = CompManager
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, ghcLink = NoLink
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, hscTarget = HscNothing
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, optLevel = 0
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}
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-- Slow
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-- Not friendly to foreign export
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-- Friendly to Template Haskell
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-- Uses large memory
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setModeIntelligent :: DynFlags -> DynFlags
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setModeIntelligent df = df {
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ghcMode = CompManager
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, ghcLink = LinkInMemory
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, hscTarget = HscInterpreted
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, optLevel = 0
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}
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setIncludeDirs :: [IncludeDir] -> DynFlags -> DynFlags
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setIncludeDirs idirs df = df { importPaths = idirs }
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setBuildEnv :: Build -> DynFlags -> DynFlags
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setBuildEnv build = setHideAllPackages build . setCabalPackage build
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-- At the moment with this option set ghc only prints different error messages,
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-- suggesting the user to add a hidden package to the build-depends in his cabal
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-- file for example
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setCabalPackage :: Build -> DynFlags -> DynFlags
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setCabalPackage CabalPkg df = Gap.setCabalPkg df
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setCabalPackage _ df = df
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-- | Enable hiding of all package not explicitly exposed (like Cabal does)
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setHideAllPackages :: Build -> DynFlags -> DynFlags
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setHideAllPackages CabalPkg df = Gap.setHideAllPackages df
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setHideAllPackages _ df = df
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-- | Parse command line ghc options and add them to the 'DynFlags' passed
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addCmdOpts :: GhcMonad m => [GHCOption] -> DynFlags -> m DynFlags
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addCmdOpts cmdOpts df =
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tfst <$> G.parseDynamicFlags df (map G.noLoc cmdOpts)
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where
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tfst (a,_,_) = a
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----------------------------------------------------------------
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-- | Return the 'DynFlags' currently in use in the GHC session.
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getDynamicFlags :: IO DynFlags
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getDynamicFlags = G.runGhc (Just libdir) G.getSessionDynFlags
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withDynFlags :: GhcMonad m
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=> (DynFlags -> DynFlags)
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-> m a
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-> m a
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withDynFlags setFlags body = G.gbracket setup teardown (\_ -> body)
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where
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setup = do
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dflags <- G.getSessionDynFlags
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void $ G.setSessionDynFlags (setFlags dflags)
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return dflags
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teardown = void . G.setSessionDynFlags
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withCmdFlags :: GhcMonad m => [GHCOption] -> m a -> m a
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withCmdFlags flags body = G.gbracket setup teardown (\_ -> body)
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where
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setup = do
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dflags <- G.getSessionDynFlags
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void $ G.setSessionDynFlags =<< addCmdOpts flags dflags
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return dflags
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teardown = void . G.setSessionDynFlags
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----------------------------------------------------------------
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-- | Set 'DynFlags' equivalent to "-w:".
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setNoWaringFlags :: DynFlags -> DynFlags
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setNoWaringFlags df = df { warningFlags = Gap.emptyWarnFlags}
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-- | Set 'DynFlags' equivalent to "-Wall".
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setAllWaringFlags :: DynFlags -> DynFlags
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setAllWaringFlags df = df { warningFlags = allWarningFlags }
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allWarningFlags :: Gap.WarnFlags
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allWarningFlags = unsafePerformIO $
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G.runGhc (Just libdir) $ do
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df <- G.getSessionDynFlags
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df' <- addCmdOpts ["-Wall"] df
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return $ G.warningFlags df'
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----------------------------------------------------------------
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-- | Set 'DynFlags' equivalent to "-fno-max-relevant-bindings".
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setNoMaxRelevantBindings :: DynFlags -> DynFlags
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#if __GLASGOW_HASKELL__ >= 708
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setNoMaxRelevantBindings df = df { maxRelevantBinds = Nothing }
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#else
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setNoMaxRelevantBindings = id
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#endif
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