521 lines
18 KiB
Haskell
521 lines
18 KiB
Haskell
-- ghc-mod: Happy Haskell Hacking
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-- Copyright (C) 2015 Daniel Gröber <dxld ÄT darkboxed DOT org>
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--
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU Affero General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU Affero General Public License for more details.
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--
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-- You should have received a copy of the GNU Affero General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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{-# LANGUAGE CPP, ViewPatterns, NamedFieldPuns, RankNTypes #-}
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module GhcMod.Target where
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import Control.Arrow
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import Control.Applicative
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import Control.Category ((.))
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import GHC
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#if __GLASGOW_HASKELL__ >= 800
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import GHC.LanguageExtensions
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#endif
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import GHC.Paths (libdir)
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import SysTools
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import DynFlags
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import HscTypes
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import Pretty
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import GhcMod.DynFlags
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import GhcMod.Monad.Types
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import GhcMod.CabalHelper
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import GhcMod.HomeModuleGraph
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import GhcMod.PathsAndFiles
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import GhcMod.GhcPkg
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import GhcMod.Error
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import GhcMod.Logging
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import GhcMod.Types
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import GhcMod.Utils as U
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import GhcMod.FileMapping
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import GhcMod.LightGhc
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import GhcMod.CustomPackageDb
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import GhcMod.Output
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import Safe
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import Data.Maybe
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import Data.Monoid as Monoid
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import Data.Either
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import Data.Foldable as Foldable (foldrM)
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import qualified Data.Foldable as Foldable
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import Data.Traversable hiding (mapM, forM)
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import Data.IORef
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import Data.List
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import Data.Map (Map)
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import qualified Data.Map as Map
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import Data.Set (Set)
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import qualified Data.Set as Set
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import Data.Function (on)
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import Distribution.Helper
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import Prelude hiding ((.))
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import System.Directory
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import System.FilePath
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runGmPkgGhc :: (IOish m, Gm m) => LightGhc a -> m a
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runGmPkgGhc action = do
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pkgOpts <- packageGhcOptions
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withLightHscEnv pkgOpts $ \env -> liftIO $ runLightGhc env action
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initSession :: IOish m
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=> [GHCOption]
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-> (forall gm. GhcMonad gm => DynFlags -> gm DynFlags)
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-> GhcModT m ()
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initSession opts mdf = do
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s <- gmsGet
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case gmGhcSession s of
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Nothing -> do
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gmLog GmDebug "initSession" $ text "Session not initialized, creating new one"
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putNewSession s
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Just (GmGhcSession hsc_env_ref) -> do
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crdl <- cradle
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df <- liftIO $ hsc_dflags <$> readIORef hsc_env_ref
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changed <-
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withLightHscEnv' (initDF crdl) $ \hsc_env -> do
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let dfEq = concat $ hsc_dflags hsc_env `eqDynFlags` df
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gmLog GmDebug "initSession" $ text $ "dfEq=" ++ (show $ filter (\t -> not (fst t)) dfEq)
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-- gmLog GmDebug "initSession" $ text $ "dfEq=" ++ (show dfEq)
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let eq = and $ map fst dfEq
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-- return $ not $ hsc_dflags hsc_env `eqDynFlags` df
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return $ not eq
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if changed
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then do
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gmLog GmDebug "initSession" $ text "Flags changed, creating new session"
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teardownSession hsc_env_ref
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putNewSession s
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else
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gmLog GmDebug "initSession" $ text "Session already initialized"
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where
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initDF Cradle { cradleTempDir } df =
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setTmpDir cradleTempDir <$> (mdf =<< addCmdOpts opts df)
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teardownSession hsc_env_ref = do
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hsc_env <- liftIO $ readIORef hsc_env_ref
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teardownLightEnv hsc_env
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putNewSession :: IOish m => GhcModState -> GhcModT m ()
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putNewSession s = do
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crdl <- cradle
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nhsc_env_ref <- liftIO . newIORef =<< newLightEnv (initDF crdl)
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runLightGhc' nhsc_env_ref $ setSessionDynFlags =<< getSessionDynFlags
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gmsPut s { gmGhcSession = Just $ GmGhcSession nhsc_env_ref }
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-- | Drop the currently active GHC session, the next that requires a GHC session
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-- will initialize a new one.
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dropSession :: IOish m => GhcModT m ()
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dropSession = do
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s <- gmsGet
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case gmGhcSession s of
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Just (GmGhcSession ref) -> do
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-- TODO: This is still not enough, there seem to still be references to
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-- GHC's state around afterwards.
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liftIO $ writeIORef ref (error "HscEnv: session was dropped")
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-- Not available on ghc<7.8; didn't really help anyways
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-- liftIO $ setUnsafeGlobalDynFlags (error "DynFlags: session was dropped")
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gmsPut s { gmGhcSession = Nothing }
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Nothing -> return ()
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-- | Run a GmlT action (i.e. a function in the GhcMonad) in the context
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-- of certain files or modules
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runGmlT :: IOish m => [Either FilePath ModuleName] -> GmlT m a -> GhcModT m a
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runGmlT fns action = runGmlT' fns return action
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-- | Run a GmlT action (i.e. a function in the GhcMonad) in the context
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-- of certain files or modules, with updated GHC flags
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runGmlT' :: IOish m
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=> [Either FilePath ModuleName]
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-> (forall gm. GhcMonad gm => DynFlags -> gm DynFlags)
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-> GmlT m a
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-> GhcModT m a
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runGmlT' fns mdf action = runGmlTWith fns mdf id action
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-- | Run a GmlT action (i.e. a function in the GhcMonad) in the context
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-- of certain files or modules, with updated GHC flags and a final
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-- transformation
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runGmlTWith :: IOish m
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=> [Either FilePath ModuleName]
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-> (forall gm. GhcMonad gm => DynFlags -> gm DynFlags)
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-> (GmlT m a -> GmlT m b)
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-> GmlT m a
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-> GhcModT m b
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runGmlTWith efnmns' mdf wrapper action = do
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crdl <- cradle
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Options { optGhcUserOptions } <- options
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let (fns, mns) = partitionEithers efnmns'
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ccfns = map (cradleCurrentDir crdl </>) fns
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cfns <- mapM getCanonicalFileNameSafe ccfns
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let serfnmn = Set.fromList $ map Right mns ++ map Left cfns
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opts <- targetGhcOptions crdl serfnmn
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let opts' = opts ++ ["-O0"] ++ optGhcUserOptions
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gmVomit
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"session-ghc-options"
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(text "Initializing GHC session with following options")
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(intercalate " " $ map (("\""++) . (++"\"")) opts')
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GhcModLog { gmLogLevel = Just level } <- gmlHistory
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putErr <- gmErrStrIO
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let setLogger | level >= GmDebug = setDebugLogger putErr
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| otherwise = setEmptyLogger
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initSession opts' $
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setHscNothing >>> setLogger >>> mdf
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mappedStrs <- getMMappedFilePaths
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let targetStrs = mappedStrs ++ map moduleNameString mns ++ cfns
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unGmlT $ wrapper $ do
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loadTargets opts targetStrs
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action
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targetGhcOptions :: forall m. IOish m
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=> Cradle
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-> Set (Either FilePath ModuleName)
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-> GhcModT m [GHCOption]
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targetGhcOptions crdl sefnmn = do
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when (Set.null sefnmn) $ error "targetGhcOptions: no targets given"
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case cradleProject crdl of
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proj
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| isCabalHelperProject proj -> cabalOpts crdl
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| otherwise -> sandboxOpts crdl
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where
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zipMap f l = l `zip` (f `map` l)
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cabalOpts :: Cradle -> GhcModT m [String]
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cabalOpts Cradle{..} = do
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mcs <- cabalResolvedComponents
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let mdlcs = moduleComponents mcs `zipMap` Set.toList sefnmn
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candidates = findCandidates $ map snd mdlcs
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let noCandidates = Set.null candidates
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noModuleHasAnyAssignment = all (Set.null . snd) mdlcs
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if noCandidates && noModuleHasAnyAssignment
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then do
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-- First component should be ChLibName, if no lib will take lexically first exe.
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let cns = filter (/= ChSetupHsName) $ Map.keys mcs
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gmLog GmDebug "" $ strDoc $ "Could not find a component assignment, falling back to picking library component in cabal file."
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return $ gmcGhcOpts $ fromJustNote "targetGhcOptions, no-assignment" $ Map.lookup (head cns) mcs
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else do
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when noCandidates $
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throwError $ GMECabalCompAssignment mdlcs
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let cn = pickComponent candidates
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return $ gmcGhcOpts $ fromJustNote "targetGhcOptions" $ Map.lookup cn mcs
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resolvedComponentsCache :: IOish m => FilePath ->
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Cached (GhcModT m) GhcModState
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[GmComponent 'GMCRaw (Set.Set ModulePath)]
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(Map.Map ChComponentName (GmComponent 'GMCResolved (Set.Set ModulePath)))
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resolvedComponentsCache distdir = Cached {
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cacheLens = Just (lGmcResolvedComponents . lGmCaches),
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cacheFile = resolvedComponentsCacheFile distdir,
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cachedAction = \tcfs comps ma -> do
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Cradle {..} <- cradle
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let iifs = invalidatingInputFiles tcfs
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setupChanged =
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(cradleRootDir </> setupConfigPath distdir) `elem` iifs
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mums :: Maybe [Either FilePath ModuleName]
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mums =
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let
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filterOutSetupCfg =
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filter (/= cradleRootDir </> setupConfigPath distdir)
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changedFiles = filterOutSetupCfg iifs
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in if null changedFiles || setupChanged
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then Nothing
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else Just $ map Left changedFiles
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let mdesc (Left f) = "file:" ++ f
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mdesc (Right mn) = "module:" ++ moduleNameString mn
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changed = map (text . mdesc) $ Foldable.concat mums
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changedDoc | [] <- changed = text "none"
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| otherwise = sep changed
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gmLog GmDebug "resolvedComponentsCache" $
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text "files changed" <+>: changedDoc
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mcs <- resolveGmComponents ((,) <$> mums <*> ma) comps
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return (setupConfigPath distdir : flatten mcs , mcs)
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}
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where
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flatten :: Map.Map ChComponentName (GmComponent t (Set.Set ModulePath))
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-> [FilePath]
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flatten = Map.elems
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>>> map (gmcHomeModuleGraph >>> gmgGraph
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>>> (Map.keysSet &&& Map.elems)
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>>> uncurry insert
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>>> map (Set.map mpPath)
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>>> Set.unions
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)
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>>> Set.unions
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>>> Set.toList
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moduleComponents :: Map ChComponentName (GmComponent t (Set ModulePath))
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-> Either FilePath ModuleName
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-> Set ChComponentName
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moduleComponents m efnmn =
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foldr' Set.empty m $ \c s ->
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let
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memb =
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case efnmn of
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Left fn -> fn `Set.member` Set.map mpPath (smp c)
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Right mn -> mn `Set.member` Set.map mpModule (smp c)
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in if memb
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then Set.insert (gmcName c) s
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else s
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where
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smp c = Map.keysSet $ gmgGraph $ gmcHomeModuleGraph c
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foldr' b as f = Map.foldr f b as
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findCandidates :: [Set ChComponentName] -> Set ChComponentName
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findCandidates [] = Set.empty
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findCandidates scns = foldl1 Set.intersection scns
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pickComponent :: Set ChComponentName -> ChComponentName
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pickComponent scn = Set.findMin scn
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packageGhcOptions :: (IOish m, Applicative m, Gm m) => m [GHCOption]
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packageGhcOptions = do
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crdl <- cradle
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case cradleProject crdl of
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proj
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| isCabalHelperProject proj -> getGhcMergedPkgOptions
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| otherwise -> sandboxOpts crdl
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-- also works for plain projects!
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sandboxOpts :: (IOish m, GmEnv m) => Cradle -> m [String]
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sandboxOpts crdl = do
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mCusPkgDb <- getCustomPkgDbStack
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pkgDbStack <- liftIO $ getSandboxPackageDbStack
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let pkgOpts = ghcDbStackOpts $ fromMaybe pkgDbStack mCusPkgDb
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return $ ["-i" ++ d | d <- [wdir,rdir]] ++ pkgOpts ++ ["-Wall"]
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where
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(wdir, rdir) = (cradleCurrentDir crdl, cradleRootDir crdl)
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getSandboxPackageDbStack :: IO [GhcPkgDb]
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getSandboxPackageDbStack =
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([GlobalDb] ++) . maybe [UserDb] return <$> getSandboxDb crdl
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resolveGmComponent :: (IOish m, Gm m)
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=> Maybe [CompilationUnit] -- ^ Updated modules
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-> GmComponent 'GMCRaw (Set ModulePath)
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-> m (GmComponent 'GMCResolved (Set ModulePath))
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resolveGmComponent mums c@GmComponent {..} = do
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distDir <- cradleDistDir <$> cradle
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gmLog GmDebug "resolveGmComponent" $ text $ show $ ghcOpts distDir
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withLightHscEnv (ghcOpts distDir) $ \env -> do
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let srcDirs = if null gmcSourceDirs then [""] else gmcSourceDirs
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let mg = gmcHomeModuleGraph
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let simp = gmcEntrypoints
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sump <- case mums of
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Nothing -> return simp
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Just ums ->
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Set.fromList . catMaybes <$>
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mapM (resolveModule env srcDirs) ums
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mg' <- canonicalizeModuleGraph =<< updateHomeModuleGraph env mg simp sump
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return $ c { gmcEntrypoints = simp, gmcHomeModuleGraph = mg' }
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where ghcOpts distDir = concat [
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gmcGhcSrcOpts,
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gmcGhcLangOpts,
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[ "-optP-include", "-optP" ++ distDir </> macrosHeaderPath ]
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]
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resolveEntrypoint :: (IOish m, Gm m)
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=> Cradle
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-> GmComponent 'GMCRaw ChEntrypoint
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-> m (GmComponent 'GMCRaw (Set ModulePath))
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resolveEntrypoint Cradle {..} c@GmComponent {..} = do
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gmLog GmDebug "resolveEntrypoint" $ text $ show $ gmcGhcSrcOpts
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withLightHscEnv gmcGhcSrcOpts $ \env -> do
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let srcDirs = if null gmcSourceDirs then [""] else gmcSourceDirs
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eps <- liftIO $ resolveChEntrypoints cradleRootDir gmcEntrypoints
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rms <- resolveModule env srcDirs `mapM` eps
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return c { gmcEntrypoints = Set.fromList $ catMaybes rms }
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-- TODO: remember that the file from `main-is:` is always module `Main` and let
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-- ghc do the warning about it. Right now we run that module through
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-- resolveModule like any other
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resolveChEntrypoints :: FilePath -> ChEntrypoint -> IO [CompilationUnit]
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resolveChEntrypoints _ (ChLibEntrypoint em om) =
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return $ map (Right . chModToMod) (em ++ om)
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resolveChEntrypoints _ (ChExeEntrypoint main om) =
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return $ [Left main] ++ map (Right . chModToMod) om
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resolveChEntrypoints srcDir ChSetupEntrypoint = do
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shs <- doesFileExist (srcDir </> "Setup.hs")
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slhs <- doesFileExist (srcDir </> "Setup.lhs")
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return $ case (shs, slhs) of
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(True, _) -> [Left "Setup.hs"]
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(_, True) -> [Left "Setup.lhs"]
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(False, False) -> []
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chModToMod :: ChModuleName -> ModuleName
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chModToMod (ChModuleName mn) = mkModuleName mn
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resolveModule :: (IOish m, Gm m) =>
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HscEnv -> [FilePath] -> CompilationUnit -> m (Maybe ModulePath)
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resolveModule env _srcDirs (Right mn) =
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liftIO $ traverse canonicalizeModulePath =<< findModulePath env mn
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resolveModule env srcDirs (Left fn') = do
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mfn <- liftIO $ findFile' srcDirs fn'
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case mfn of
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Nothing -> return Nothing
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Just fn'' -> do
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fn <- liftIO $ canonicalizePath fn''
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emn <- fileModuleName env fn
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case emn of
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Left errs -> do
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gmLog GmWarning ("resolveModule " ++ show fn) $
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Pretty.empty $+$ (vcat $ map text errs)
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return Nothing -- TODO: should expose these errors otherwise
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-- modules with preprocessor/parse errors are
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-- going to be missing
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Right mmn -> return $ Just $
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case mmn of
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Nothing -> mkMainModulePath fn
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Just mn -> ModulePath mn fn
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where
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-- needed for ghc 7.4
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findFile' dirs file =
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getFirst . mconcat <$> mapM (fmap First . mightExist . (</>file)) dirs
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-- fileModuleName fn (dir:dirs)
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-- | makeRelative dir fn /= fn
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type CompilationUnit = Either FilePath ModuleName
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type Components =
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[GmComponent 'GMCRaw (Set ModulePath)]
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type ResolvedComponentsMap =
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Map ChComponentName (GmComponent 'GMCResolved (Set ModulePath))
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resolveGmComponents :: (IOish m, Gm m)
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=> Maybe ([CompilationUnit], ResolvedComponentsMap)
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-- ^ Updated modules
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-> Components -> m ResolvedComponentsMap
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resolveGmComponents mcache cs = do
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let rcm = fromMaybe Map.empty $ snd <$> mcache
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m' <- foldrM' rcm cs $ \c m -> do
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case Map.lookup (gmcName c) m of
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Nothing -> insertUpdated m c
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Just c' -> if same gmcRawEntrypoints c c' && same gmcGhcSrcOpts c c'
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then return m
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else insertUpdated m c
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return m'
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where
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foldrM' b fa f = foldrM f b fa
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insertUpdated m c = do
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rc <- resolveGmComponent (fst <$> mcache) c
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return $ Map.insert (gmcName rc) rc m
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same :: Eq b
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=> (forall t a. GmComponent t a -> b)
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-> GmComponent u c -> GmComponent v d -> Bool
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same f a b = (f a) == (f b)
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-- | Set the files as targets and load them.
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loadTargets :: IOish m => [GHCOption] -> [FilePath] -> GmlT m ()
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loadTargets opts targetStrs = do
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targets' <-
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withLightHscEnv opts $ \env ->
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liftM (nubBy ((==) `on` targetId))
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(mapM ((`guessTarget` Nothing) >=> mapFile env) targetStrs)
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>>= mapM relativize
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let targets = map (\t -> t { targetAllowObjCode = False }) targets'
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gmLog GmDebug "loadTargets" $
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text "Loading" <+>: fsep (map (text . showTargetId) targets)
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setTargets targets
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mg <- depanal [] False
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let interp = needsHscInterpreted mg
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target <- hscTarget <$> getSessionDynFlags
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when (interp && target /= HscInterpreted) $ do
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_ <- setSessionDynFlags . setHscInterpreted =<< getSessionDynFlags
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gmLog GmInfo "loadTargets" $ text "Target needs interpeter, switching to LinkInMemory/HscInterpreted. Perfectly normal if anything is using TemplateHaskell, QuasiQuotes or PatternSynonyms."
|
|
|
|
target' <- hscTarget <$> getSessionDynFlags
|
|
|
|
case target' of
|
|
HscNothing -> do
|
|
void $ load LoadAllTargets
|
|
forM_ mg $
|
|
handleSourceError (gmLog GmDebug "loadTargets" . text . show)
|
|
. void . (parseModule >=> typecheckModule >=> desugarModule)
|
|
HscInterpreted -> do
|
|
void $ load LoadAllTargets
|
|
_ -> error ("loadTargets: unsupported hscTarget")
|
|
|
|
gmLog GmDebug "loadTargets" $ text "Loading done"
|
|
|
|
where
|
|
relativize (Target (TargetFile filePath phase) taoc src) = do
|
|
crdl <- cradle
|
|
let tid = TargetFile relativeFilePath phase
|
|
relativeFilePath = makeRelative (cradleRootDir crdl) filePath
|
|
return $ Target tid taoc src
|
|
relativize tgt = return tgt
|
|
|
|
showTargetId (Target (TargetModule s) _ _) = moduleNameString s
|
|
showTargetId (Target (TargetFile s _) _ _) = s
|
|
|
|
needsHscInterpreted :: ModuleGraph -> Bool
|
|
needsHscInterpreted = any $ \ms ->
|
|
let df = ms_hspp_opts ms in
|
|
#if __GLASGOW_HASKELL__ >= 800
|
|
TemplateHaskell `xopt` df
|
|
|| QuasiQuotes `xopt` df
|
|
|| PatternSynonyms `xopt` df
|
|
#else
|
|
Opt_TemplateHaskell `xopt` df
|
|
|| Opt_QuasiQuotes `xopt` df
|
|
#if __GLASGOW_HASKELL__ >= 708
|
|
|| (Opt_PatternSynonyms `xopt` df)
|
|
#endif
|
|
#endif
|
|
|
|
cabalResolvedComponents :: (IOish m) =>
|
|
GhcModT m (Map ChComponentName (GmComponent 'GMCResolved (Set ModulePath)))
|
|
cabalResolvedComponents = do
|
|
crdl@(Cradle{..}) <- cradle
|
|
comps <- mapM (resolveEntrypoint crdl) =<< getComponents
|
|
withAutogen $
|
|
cached cradleRootDir (resolvedComponentsCache cradleDistDir) comps
|