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Check session validity via equality on DynFlags

This commit is contained in:
Daniel Gröber 2016-02-14 08:41:11 +01:00
parent b4de82632e
commit 2e4c2b5228
6 changed files with 139 additions and 16 deletions
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12
Language/Haskell/GhcMod/DynFlags.hs
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@ -1,4 +1,4 @@
{-# LANGUAGE CPP #-}
{-# LANGUAGE CPP, TemplateHaskell #-}
module Language.Haskell.GhcMod.DynFlags where
@ -10,6 +10,7 @@ import GHC.Paths (libdir)
import qualified Language.Haskell.GhcMod.Gap as Gap
import Language.Haskell.GhcMod.Types
import Language.Haskell.GhcMod.DebugLogger
import Language.Haskell.GhcMod.DynFlagsTH
import System.IO.Unsafe (unsafePerformIO)
import Prelude
@ -102,7 +103,14 @@ setNoMaxRelevantBindings df = df { maxRelevantBinds = Nothing }
setNoMaxRelevantBindings = id
#endif
deferErrors :: DynFlags -> Ghc DynFlags
deferErrors :: Monad m => DynFlags -> m DynFlags
deferErrors df = return $
Gap.setWarnTypedHoles $ Gap.setDeferTypedHoles $
Gap.setDeferTypeErrors $ setNoWarningFlags df
----------------------------------------------------------------
deriveEqDynFlags [d|
eqDynFlags :: DynFlags -> DynFlags -> Bool
eqDynFlags = undefined
|]

97
Language/Haskell/GhcMod/DynFlagsTH.hs Normal file
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@ -0,0 +1,97 @@
-- ghc-mod: Making Haskell development *more* fun
-- Copyright (C) 2015 Daniel Gröber <dxld ÄT darkboxed DOT org>
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
{-# LANGUAGE TemplateHaskell #-}
module Language.Haskell.GhcMod.DynFlagsTH where
import Language.Haskell.TH.Syntax
import Data.Maybe
import Data.Generics.Aliases
import Data.Generics.Schemes
import Packages
import Hooks
import DynFlags
deriveEqDynFlags :: Q [Dec] -> Q [Dec]
deriveEqDynFlags qds = do
~(TyConI (DataD [] _ [] [ctor] _ )) <- reify ''DynFlags
let ~(RecC _ fs) = ctor
a <- newName "a"
b <- newName "b"
e <- AppE (VarE 'and) . ListE <$> sequence (catMaybes $ map (eq a b) fs)
tysig@(SigD n _) :_ <- qds
return $ [tysig, FunD n [Clause [VarP a, VarP b] (NormalB e) []]]
where
eq :: Name -> Name -> (Name, Strict, Type) -> Maybe (Q Exp)
eq a b (fn@(Name (OccName fon) _), _, ft)
| not isUneqable = Just expr
| otherwise = Nothing
where
isUneqable = everything (||) (mkQ False hasUnEqable) ft
hasUnEqable ArrowT = True
hasUnEqable (ConT n@(Name (OccName on) _))
| n == ''LogAction = True
| any (==n) ignoredTypeNames = True
| any (==on) ignoredTypeOccNames = True
hasUnEqable _ = False
ignoredTypeNames =
[ ''PackageState
, ''Hooks
, ''FlushOut
, ''FlushErr
, ''Settings -- I think these can't cange at runtime
]
ignoredTypeOccNames = [ "OnOff" ]
fa = AppE (VarE fn) (VarE a)
fb = AppE (VarE fn) (VarE b)
expr =
case fon of
"language" -> do
eqfn <- [| let eqfn (Just Haskell98) (Just Haskell98) = True
eqfn (Just Haskell2010) (Just Haskell2010) = True
eqfn _ _ = False
in eqfn
|]
return $ AppE (AppE eqfn fa) fb
"rtsOptsEnabled" -> do
eqfn <- [| let eqfn RtsOptsNone RtsOptsNone = True
eqfn RtsOptsSafeOnly RtsOptsSafeOnly = True
eqfn RtsOptsAll RtsOptsAll = True
eqfn _ _ = False
in eqfn
|]
return $ AppE (AppE eqfn fa) fb
"sigOf" -> do
eqfn <- [| let eqfn NotSigOf NotSigOf = True
eqfn (SigOf a') (SigOf b') = a' == b'
eqfn (SigOfMap a') (SigOfMap b') = a' == b'
eqfn _ _ = False
in eqfn
|]
return $ AppE (AppE eqfn fa) fb
_ ->
return $ InfixE (Just fa) (VarE '(==)) (Just fb)

4
Language/Haskell/GhcMod/LightGhc.hs
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@ -42,3 +42,7 @@ runLightGhc :: HscEnv -> LightGhc a -> IO a
runLightGhc env action = do
renv <- newIORef env
flip runReaderT renv $ unLightGhc action
runLightGhc' :: IORef HscEnv -> LightGhc a -> IO a
runLightGhc' renv action = do
flip runReaderT renv $ unLightGhc action

2
Language/Haskell/GhcMod/Logger.hs
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@ -169,6 +169,6 @@ checkErrorPrefix :: String
checkErrorPrefix = "Dummy:0:0:Error:"
warningAsErrorPrefixes :: [String]
warningAsErrorPrefixes = ["Couldn't match expected type"
warningAsErrorPrefixes = [ "Couldn't match expected type"
, "Couldn't match type"
, "No instance for"]

38
Language/Haskell/GhcMod/Target.hs
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@ -66,29 +66,41 @@ runGmPkgGhc action = do
withLightHscEnv pkgOpts $ \env -> liftIO $ runLightGhc env action
initSession :: IOish m
=> [GHCOption] -> (DynFlags -> Ghc DynFlags) -> GhcModT m ()
=> [GHCOption] -> (forall gm. GhcMonad gm => DynFlags -> gm DynFlags) -> GhcModT m ()
initSession opts mdf = do
s <- gmsGet
case gmGhcSession s of
Just GmGhcSession {..} | gmgsOptions /= opts-> do
gmLog GmDebug "initSession" $ text "Flags changed, creating new session"
putNewSession s
Just _ -> return ()
Nothing -> do
gmLog GmDebug "initSession" $ text "Session not initialized, creating new one"
putNewSession s
Just GmGhcSession {..} -> do
gmLog GmDebug "initSession" $ text "Flags changed, creating new session"
crdl <- cradle
changed <- liftIO $ runLightGhc' gmgsSession $ do
df <- getSessionDynFlags
ndf <- initDF crdl
return $ ndf `eqDynFlags` df
if changed
then putNewSession s
else return ()
where
putNewSession s = do
rghc <- (liftIO . newIORef =<< newSession =<< cradle)
gmsPut s { gmGhcSession = Just $ GmGhcSession opts rghc }
newSession Cradle { cradleTempDir } = liftIO $ do
runGhc (Just libdir) $ do
initDF Cradle { cradleTempDir } = do
let setDf df = setTmpDir cradleTempDir <$> (mdf =<< addCmdOpts opts df)
_ <- setSessionDynFlags =<< setDf =<< getSessionDynFlags
getSessionDynFlags
putNewSession s = do
rghc <- (liftIO . newIORef =<< newSession)
gmsPut s { gmGhcSession = Just $ GmGhcSession opts rghc }
newSession = do
crdl <- cradle
liftIO $ runGhc (Just libdir) $ do
_ <- initDF crdl
getSession
-- | Drop the currently active GHC session, the next that requires a GHC session
-- will initialize a new one.
dropSession :: IOish m => GhcModT m ()
@ -114,7 +126,7 @@ runGmlT fns action = runGmlT' fns return action
-- of certain files or modules, with updated GHC flags
runGmlT' :: IOish m
=> [Either FilePath ModuleName]
-> (DynFlags -> Ghc DynFlags)
-> (forall gm. GhcMonad gm => DynFlags -> gm DynFlags)
-> GmlT m a
-> GhcModT m a
runGmlT' fns mdf action = runGmlTWith fns mdf id action
@ -124,7 +136,7 @@ runGmlT' fns mdf action = runGmlTWith fns mdf id action
-- transformation
runGmlTWith :: IOish m
=> [Either FilePath ModuleName]
-> (DynFlags -> Ghc DynFlags)
-> (forall gm. GhcMonad gm => DynFlags -> gm DynFlags)
-> (GmlT m a -> GmlT m b)
-> GmlT m a
-> GhcModT m b

2
ghc-mod.cabal
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@ -187,6 +187,8 @@ Library
, extra == 1.4.*
, pipes == 4.1.*
, safe < 0.4 && >= 0.3.9
, template-haskell
, syb
if impl(ghc < 7.8)
Build-Depends: convertible
if impl(ghc < 7.5)