{-# LANGUAGE MultiWayIf #-}
{-# LANGUAGE CPP #-}
{-# LANGUAGE NondecreasingIndentation, ScopedTypeVariables #-}
{-# LANGUAGE TupleSections, NamedFieldPuns #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE PatternSynonyms #-}

-- -----------------------------------------------------------------------------
--
-- (c) The University of Glasgow, 2005-2012
--
-- The GHC API
--
-- -----------------------------------------------------------------------------

module GHC (
        -- * Initialisation
        defaultErrorHandler,
        defaultCleanupHandler,
        prettyPrintGhcErrors,
        withSignalHandlers,
        withCleanupSession,

        -- * GHC Monad
        Ghc, GhcT, GhcMonad(..), HscEnv,
        runGhc, runGhcT, initGhcMonad,
        printException,
        handleSourceError,

        -- * Flags and settings
        DynFlags(..), GeneralFlag(..), Severity(..), Backend, gopt,
        ncgBackend, llvmBackend, viaCBackend, interpreterBackend, noBackend,
        GhcMode(..), GhcLink(..),
        parseDynamicFlags, parseTargetFiles,
        getSessionDynFlags,
        setTopSessionDynFlags,
        setSessionDynFlags,
        setUnitDynFlags,
        getProgramDynFlags, setProgramDynFlags,
        getInteractiveDynFlags, setInteractiveDynFlags,
        interpretPackageEnv,

        -- * Logging
        Logger, getLogger,
        pushLogHook, popLogHook,
        pushLogHookM, popLogHookM, modifyLogger,
        putMsgM, putLogMsgM,


        -- * Targets
        Target(..), TargetId(..), Phase,
        setTargets,
        getTargets,
        addTarget,
        removeTarget,
        guessTarget,

        -- * Loading\/compiling the program
        depanal, depanalE,
        load, loadWithCache, LoadHowMuch(..), InteractiveImport(..),
        SuccessFlag(..), succeeded, failed,
        defaultWarnErrLogger, WarnErrLogger,
        workingDirectoryChanged,
        parseModule, typecheckModule, desugarModule,
        ParsedModule(..), TypecheckedModule(..), DesugaredModule(..),
        TypecheckedSource, ParsedSource, RenamedSource,   -- ditto
        TypecheckedMod, ParsedMod,
        moduleInfo, renamedSource, typecheckedSource,
        parsedSource, coreModule,
        PkgQual(..),

        -- ** Compiling to Core
        CoreModule(..),
        compileToCoreModule, compileToCoreSimplified,

        -- * Inspecting the module structure of the program
        ModuleGraph, emptyMG, mapMG, mkModuleGraph, mgModSummaries,
        mgLookupModule,
        ModSummary(..), ms_mod_name, ModLocation(..),
        pattern ModLocation,
        getModSummary,
        getModuleGraph,
        isLoaded,
        isLoadedModule,
        topSortModuleGraph,

        -- * Inspecting modules
        ModuleInfo,
        getModuleInfo,
        modInfoTyThings,
        modInfoExports,
        modInfoExportsWithSelectors,
        modInfoInstances,
        modInfoIsExportedName,
        modInfoLookupName,
        modInfoIface,
        modInfoSafe,
        lookupGlobalName,
        findGlobalAnns,
        mkNamePprCtxForModule,
        ModIface,
        ModIface_(
          mi_module,
          mi_sig_of,
          mi_hsc_src,
          mi_src_hash,
          mi_hi_bytes,
          mi_deps,
          mi_usages,
          mi_exports,
          mi_used_th,
          mi_fixities,
          mi_warns,
          mi_anns,
          mi_insts,
          mi_fam_insts,
          mi_rules,
          mi_decls,
          mi_extra_decls,
          mi_top_env,
          mi_hpc,
          mi_trust,
          mi_trust_pkg,
          mi_complete_matches,
          mi_docs,
          mi_final_exts,
          mi_ext_fields
        ),
        pattern ModIface,
        SafeHaskellMode(..),

        -- * Printing
        NamePprCtx, alwaysQualify,

        -- * Interactive evaluation

        -- ** Executing statements
        execStmt, execStmt', ExecOptions(..), execOptions, ExecResult(..),
        resumeExec,

        -- ** Adding new declarations
        runDecls, runDeclsWithLocation, runParsedDecls,

        -- ** Get/set the current context
        parseImportDecl,
        setContext, getContext,
        setGHCiMonad, getGHCiMonad,

        -- ** Inspecting the current context
        getBindings, getInsts, getNamePprCtx,
        findModule, lookupModule,
        findQualifiedModule, lookupQualifiedModule,
        renamePkgQualM, renameRawPkgQualM,
        isModuleTrusted, moduleTrustReqs,
        getNamesInScope,
        getRdrNamesInScope,
        getGRE,
        moduleIsInterpreted,
        getInfo,
        showModule,
        moduleIsBootOrNotObjectLinkable,
        getNameToInstancesIndex,

        -- ** Inspecting types and kinds
        exprType, TcRnExprMode(..),
        typeKind,

        -- ** Looking up a Name
        parseName,
        lookupName,

        -- ** Compiling expressions
        HValue, parseExpr, compileParsedExpr,
        GHC.Runtime.Eval.compileExpr, dynCompileExpr,
        ForeignHValue,
        compileExprRemote, compileParsedExprRemote,

        -- ** Docs
        getDocs, GetDocsFailure(..),

        -- ** Other
        runTcInteractive,   -- Desired by some clients (#8878)
        isStmt, hasImport, isImport, isDecl,

        -- ** The debugger
        SingleStep(..),
        Resume(..),
        History(historyBreakpointId, historyEnclosingDecls),
        GHC.getHistorySpan, getHistoryModule,
        abandon, abandonAll,
        getResumeContext,
        GHC.obtainTermFromId, GHC.obtainTermFromVal, reconstructType,
        modInfoModBreaks,
        ModBreaks(..), BreakIndex,
        BreakpointId(..), InternalBreakpointId(..),
        GHC.Runtime.Eval.back,
        GHC.Runtime.Eval.forward,
        GHC.Runtime.Eval.setupBreakpoint,

        -- * Abstract syntax elements

        -- ** Units
        Unit,

        -- ** Modules
        Module, mkModule, pprModule, moduleName, moduleUnit,

        -- ** Names
        Name,
        isExternalName, nameModule, pprParenSymName, nameSrcSpan,
        NamedThing(..),
        RdrName(Qual,Unqual),

        -- ** Identifiers
        Id, idType,
        isImplicitId, isDeadBinder,
        isExportedId, isLocalId, isGlobalId,
        isRecordSelector,
        isPrimOpId, isFCallId, isClassOpId_maybe,
        isDataConWorkId, idDataCon,
        isDeadEndId, isDictonaryId,
        recordSelectorTyCon,

        -- ** Type constructors
        TyCon,
        tyConTyVars, tyConDataCons, tyConArity,
        isClassTyCon, isTypeSynonymTyCon, isTypeFamilyTyCon, isNewTyCon,
        isPrimTyCon,
        isFamilyTyCon, isOpenFamilyTyCon, isOpenTypeFamilyTyCon,
        tyConClass_maybe,
        synTyConRhs_maybe, synTyConDefn_maybe, tyConKind,

        -- ** Type variables
        TyVar,
        alphaTyVars,

        -- ** Data constructors
        DataCon,
        dataConType, dataConTyCon, dataConFieldLabels,
        dataConIsInfix, isVanillaDataCon, dataConWrapperType,
        dataConSrcBangs,
        StrictnessMark(..), isMarkedStrict,

        -- ** Classes
        Class,
        classMethods, classSCTheta, classTvsFds, classATs,
        pprFundeps,

        -- ** Instances
        ClsInst,
        instanceDFunId,
        pprInstance, pprInstanceHdr,
        pprFamInst,

        FamInst,

        -- ** Types and Kinds
        Type, splitForAllTyCoVars, funResultTy,
        pprParendType, pprTypeApp,
        Kind,
        PredType,
        ThetaType, pprForAll, pprThetaArrowTy,
        parseInstanceHead,
        getInstancesForType,

        -- ** Entities
        TyThing(..),

        -- ** Syntax
        module GHC.Hs, -- ToDo: remove extraneous bits

        -- ** Fixities
        FixityDirection(..),
        defaultFixity, maxPrecedence,
        negateFixity,
        compareFixity,
        LexicalFixity(..),

        -- ** Source locations
        SrcLoc(..), RealSrcLoc,
        mkSrcLoc, noSrcLoc,
        srcLocFile, srcLocLine, srcLocCol,
        SrcSpan(..), RealSrcSpan,
        mkSrcSpan, srcLocSpan, isGoodSrcSpan, noSrcSpan,
        srcSpanStart, srcSpanEnd,
        srcSpanFile,
        srcSpanStartLine, srcSpanEndLine,
        srcSpanStartCol, srcSpanEndCol,

        -- ** Located
        GenLocated(..), Located, RealLocated,

        -- *** Constructing Located
        noLoc, mkGeneralLocated,

        -- *** Deconstructing Located
        getLoc, unLoc,
        getRealSrcSpan, unRealSrcSpan,

        -- *** Combining and comparing Located values
        eqLocated, cmpLocated, combineLocs, addCLoc,
        leftmost_smallest, leftmost_largest, rightmost_smallest,
        spans, isSubspanOf,

        -- * Exceptions
        GhcException(..), showGhcException,
        GhcApiError(..),

        -- * Token stream manipulations
        Token,
        getTokenStream, getRichTokenStream,
        showRichTokenStream, addSourceToTokens,

        -- * Pure interface to the parser
        parser,

        -- * API Annotations
        AnnKeywordId(..),
        EpaComment(..)
  ) where

{-
 ToDo:

  * inline bits of GHC.Driver.Main here to simplify layering: hscTcExpr, hscStmt.
-}

import GHC.Prelude hiding (init)

import GHC.Platform
import GHC.Platform.Ways

import GHC.Driver.Phases   ( Phase(..), isHaskellSrcFilename
                           , isSourceFilename, startPhase )
import GHC.Driver.Env
import GHC.Driver.Errors
import GHC.Driver.Errors.Types
import GHC.Driver.CmdLine
import GHC.Driver.Session
import GHC.Driver.Backend
import GHC.Driver.Config.Finder (initFinderOpts)
import GHC.Driver.Config.Parser (initParserOpts)
import GHC.Driver.Config.Logger (initLogFlags)
import GHC.Driver.Config.StgToJS (initStgToJSConfig)
import GHC.Driver.Config.Diagnostic
import GHC.Driver.Main
import GHC.Driver.Make
import GHC.Driver.Hooks
import GHC.Driver.Monad
import GHC.Driver.Ppr

import GHC.ByteCode.Types
import qualified GHC.Linker.Loader as Loader
import GHC.Runtime.Loader
import GHC.Runtime.Eval
import GHC.Runtime.Interpreter
import GHC.Runtime.Context
import GHCi.RemoteTypes

import qualified GHC.Parser as Parser
import GHC.Parser.Lexer
import GHC.Parser.Annotation
import GHC.Parser.Utils

import GHC.Iface.Env ( trace_if )
import GHC.Iface.Load        ( loadSysInterface )
import GHC.Hs
import GHC.Builtin.Types.Prim ( alphaTyVars )
import GHC.Data.StringBuffer
import GHC.Data.FastString
import qualified GHC.LanguageExtensions as LangExt
import GHC.Rename.Names (renamePkgQual, renameRawPkgQual, gresFromAvails)

import GHC.Tc.Utils.Monad    ( finalSafeMode, fixSafeInstances, initIfaceTcRn )
import GHC.Tc.Types
import GHC.Tc.Utils.TcType
import GHC.Tc.Module
import GHC.Tc.Utils.Instantiate
import GHC.Tc.Instance.Family

import GHC.Utils.TmpFs
import GHC.Utils.Error
import GHC.Utils.Exception
import GHC.Utils.Monad
import GHC.Utils.Misc
import GHC.Utils.Outputable
import GHC.Utils.Panic
import GHC.Utils.Logger
import GHC.Utils.Fingerprint

import GHC.Core.Predicate
import GHC.Core.Type  hiding( typeKind )
import GHC.Core.TyCon
import GHC.Core.TyCo.Ppr   ( pprForAll )
import GHC.Core.Class
import GHC.Core.DataCon
import GHC.Core.FamInstEnv ( FamInst, famInstEnvElts, orphNamesOfFamInst )
import GHC.Core.InstEnv
import GHC.Core

import GHC.Data.Maybe

import GHC.Types.Id
import GHC.Types.Name      hiding ( varName )
import GHC.Types.Avail
import GHC.Types.SrcLoc
import GHC.Types.TyThing.Ppr  ( pprFamInst )
import GHC.Types.Annotations
import GHC.Types.Name.Set
import GHC.Types.Name.Reader
import GHC.Types.SourceError
import GHC.Types.SafeHaskell
import GHC.Types.Error
import GHC.Types.Fixity
import GHC.Types.Target
import GHC.Types.Basic
import GHC.Types.TyThing
import GHC.Types.Name.Env
import GHC.Types.Name.Ppr
import GHC.Types.TypeEnv
import GHC.Types.Breakpoint
import GHC.Types.PkgQual
import GHC.Types.Unique.FM

import GHC.Unit
import GHC.Unit.Env
import GHC.Unit.External
import GHC.Unit.Finder
import GHC.Unit.Module.ModIface
import GHC.Unit.Module.ModGuts
import GHC.Unit.Module.ModDetails
import GHC.Unit.Module.ModSummary
import GHC.Unit.Module.Graph
import GHC.Unit.Home.ModInfo

import Control.Applicative ((<|>))
import Control.Concurrent
import Control.Monad
import Control.Monad.Catch as MC
import Data.Foldable
import Data.IORef
import Data.List (isPrefixOf)
import Data.Typeable    ( Typeable )
import Data.Word        ( Word8 )

import qualified Data.Map.Strict as Map
import Data.Set (Set)
import qualified Data.Set as S
import qualified Data.Sequence as Seq

import System.Directory
import System.Environment ( getEnv, getProgName )
import System.Exit      ( exitWith, ExitCode(..) )
import System.FilePath
import System.IO.Error  ( isDoesNotExistError )

-- %************************************************************************
-- %*                                                                      *
--             Initialisation: exception handlers
-- %*                                                                      *
-- %************************************************************************


-- | Install some default exception handlers and run the inner computation.
-- Unless you want to handle exceptions yourself, you should wrap this around
-- the top level of your program.  The default handlers output the error
-- message(s) to stderr and exit cleanly.
defaultErrorHandler :: (ExceptionMonad m)
                    => FatalMessager -> FlushOut -> m a -> m a
defaultErrorHandler :: forall (m :: * -> *) a.
ExceptionMonad m =>
FatalMessager -> FlushOut -> m a -> m a
defaultErrorHandler FatalMessager
fm (FlushOut IO ()
flushOut) m a
inner =
  -- top-level exception handler: any unrecognised exception is a compiler bug.
  (SomeException -> m a) -> m a -> m a
forall (m :: * -> *) e a.
(HasCallStack, MonadCatch m, Exception e) =>
(e -> m a) -> m a -> m a
MC.handle (\SomeException
exception -> IO a -> m a
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO a -> m a) -> IO a -> m a
forall a b. (a -> b) -> a -> b
$ do
           IO ()
flushOut
           case SomeException -> Maybe IOError
forall e. Exception e => SomeException -> Maybe e
fromException SomeException
exception of
                -- an IO exception probably isn't our fault, so don't panic
                Just (IOError
ioe :: IOException) ->
                  FatalMessager
fm (IOError -> FilePath
forall a. Show a => a -> FilePath
show IOError
ioe)
                Maybe IOError
_ -> case SomeException -> Maybe AsyncException
forall e. Exception e => SomeException -> Maybe e
fromException SomeException
exception of
                     Just AsyncException
UserInterrupt ->
                         -- Important to let this one propagate out so our
                         -- calling process knows we were interrupted by ^C
                         IO () -> IO ()
forall a. IO a -> IO a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> IO ()) -> IO () -> IO ()
forall a b. (a -> b) -> a -> b
$ AsyncException -> IO ()
forall e a. (HasCallStack, Exception e) => e -> IO a
throwIO AsyncException
UserInterrupt
                     Just AsyncException
StackOverflow ->
                         FatalMessager
fm FilePath
"stack overflow: use +RTS -K<size> to increase it"
                     Maybe AsyncException
_ -> case SomeException -> Maybe ExitCode
forall e. Exception e => SomeException -> Maybe e
fromException SomeException
exception of
                          Just (ExitCode
ex :: ExitCode) -> IO () -> IO ()
forall a. IO a -> IO a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> IO ()) -> IO () -> IO ()
forall a b. (a -> b) -> a -> b
$ ExitCode -> IO ()
forall e a. (HasCallStack, Exception e) => e -> IO a
throwIO ExitCode
ex
                          Maybe ExitCode
_ ->
                              FatalMessager
fm (GhcException -> FilePath
forall a. Show a => a -> FilePath
show (FilePath -> GhcException
Panic (SomeException -> FilePath
forall a. Show a => a -> FilePath
show SomeException
exception)))
           ExitCode -> IO a
forall a. ExitCode -> IO a
exitWith (Int -> ExitCode
ExitFailure Int
1)
         ) (m a -> m a) -> m a -> m a
forall a b. (a -> b) -> a -> b
$

  -- error messages propagated as exceptions
  (GhcException -> m a) -> m a -> m a
forall (m :: * -> *) a.
ExceptionMonad m =>
(GhcException -> m a) -> m a -> m a
handleGhcException
            (\GhcException
ge -> IO a -> m a
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO a -> m a) -> IO a -> m a
forall a b. (a -> b) -> a -> b
$ do
                IO ()
flushOut
                case GhcException
ge of
                  Signal Int
_       -> () -> IO ()
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return ()
                  ProgramError FilePath
_ -> FatalMessager
fm (GhcException -> FilePath
forall a. Show a => a -> FilePath
show GhcException
ge)
                  CmdLineError FilePath
_ -> FatalMessager
fm (FilePath
"<command line>: " FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ GhcException -> FilePath
forall a. Show a => a -> FilePath
show GhcException
ge)
                  GhcException
_              -> do
                                    progName <- IO FilePath
getProgName
                                    fm (progName ++ ": " ++ show ge)
                ExitCode -> IO a
forall a. ExitCode -> IO a
exitWith (Int -> ExitCode
ExitFailure Int
1)
            ) (m a -> m a) -> m a -> m a
forall a b. (a -> b) -> a -> b
$
  m a
inner

-- | This function is no longer necessary, cleanup is now done by
-- runGhc/runGhcT.
{-# DEPRECATED defaultCleanupHandler "Cleanup is now done by runGhc/runGhcT" #-}
defaultCleanupHandler :: (ExceptionMonad m) => DynFlags -> m a -> m a
defaultCleanupHandler :: forall (m :: * -> *) a. ExceptionMonad m => DynFlags -> m a -> m a
defaultCleanupHandler DynFlags
_ m a
m = m a
m
 where _warning_suppression :: m a
_warning_suppression = m a
m m a -> m (ZonkAny 0) -> m a
forall (m :: * -> *) a b.
(HasCallStack, MonadCatch m) =>
m a -> m b -> m a
`MC.onException` m (ZonkAny 0)
forall a. HasCallStack => a
undefined


-- %************************************************************************
-- %*                                                                      *
--             The Ghc Monad
-- %*                                                                      *
-- %************************************************************************

-- | Run function for the 'Ghc' monad.
--
-- It initialises the GHC session and warnings via 'initGhcMonad'.  Each call
-- to this function will create a new session which should not be shared among
-- several threads.
--
-- Any errors not handled inside the 'Ghc' action are propagated as IO
-- exceptions.

runGhc :: Maybe FilePath  -- ^ See argument to 'initGhcMonad'.
       -> Ghc a           -- ^ The action to perform.
       -> IO a
runGhc :: forall a. Maybe FilePath -> Ghc a -> IO a
runGhc Maybe FilePath
mb_top_dir Ghc a
ghc = do
  ref <- HscEnv -> IO (IORef HscEnv)
forall a. a -> IO (IORef a)
newIORef (FilePath -> HscEnv
forall a. HasCallStack => FilePath -> a
panic FilePath
"empty session")
  let session = IORef HscEnv -> Session
Session IORef HscEnv
ref
  flip unGhc session $ withSignalHandlers $ do -- catch ^C
    initGhcMonad mb_top_dir
    withCleanupSession ghc

-- | Run function for 'GhcT' monad transformer.
--
-- It initialises the GHC session and warnings via 'initGhcMonad'.  Each call
-- to this function will create a new session which should not be shared among
-- several threads.

runGhcT :: ExceptionMonad m =>
           Maybe FilePath  -- ^ See argument to 'initGhcMonad'.
        -> GhcT m a        -- ^ The action to perform.
        -> m a
runGhcT :: forall (m :: * -> *) a.
ExceptionMonad m =>
Maybe FilePath -> GhcT m a -> m a
runGhcT Maybe FilePath
mb_top_dir GhcT m a
ghct = do
  ref <- IO (IORef HscEnv) -> m (IORef HscEnv)
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (IORef HscEnv) -> m (IORef HscEnv))
-> IO (IORef HscEnv) -> m (IORef HscEnv)
forall a b. (a -> b) -> a -> b
$ HscEnv -> IO (IORef HscEnv)
forall a. a -> IO (IORef a)
newIORef (FilePath -> HscEnv
forall a. HasCallStack => FilePath -> a
panic FilePath
"empty session")
  let session = IORef HscEnv -> Session
Session IORef HscEnv
ref
  flip unGhcT session $ withSignalHandlers $ do -- catch ^C
    initGhcMonad mb_top_dir
    withCleanupSession ghct

withCleanupSession :: GhcMonad m => m a -> m a
withCleanupSession :: forall (m :: * -> *) a. GhcMonad m => m a -> m a
withCleanupSession m a
ghc = m a
ghc m a -> m () -> m a
forall (m :: * -> *) a b.
(HasCallStack, MonadMask m) =>
m a -> m b -> m a
`MC.finally` m ()
cleanup
  where
   cleanup :: m ()
cleanup = do
      hsc_env <- m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession
      let dflags = HscEnv -> DynFlags
hsc_dflags HscEnv
hsc_env
      let logger = HscEnv -> Logger
hsc_logger HscEnv
hsc_env
      let tmpfs  = HscEnv -> TmpFs
hsc_tmpfs HscEnv
hsc_env
      liftIO $ do
          unless (gopt Opt_KeepTmpFiles dflags) $ do
            cleanTempFiles logger tmpfs
            cleanTempDirs logger tmpfs
          traverse_ stopInterp (hsc_interp hsc_env)
          --  exceptions will be blocked while we clean the temporary files,
          -- so there shouldn't be any difficulty if we receive further
          -- signals.

-- | Initialise a GHC session.
--
-- If you implement a custom 'GhcMonad' you must call this function in the
-- monad run function.  It will initialise the session variable and clear all
-- warnings.
--
-- The first argument should point to the directory where GHC's library files
-- reside.  More precisely, this should be the output of @ghc --print-libdir@
-- of the version of GHC the module using this API is compiled with.  For
-- portability, you should use the @ghc-paths@ package, available at
-- <http://hackage.haskell.org/package/ghc-paths>.

initGhcMonad :: GhcMonad m => Maybe FilePath -> m ()
initGhcMonad :: forall (m :: * -> *). GhcMonad m => Maybe FilePath -> m ()
initGhcMonad Maybe FilePath
mb_top_dir = HscEnv -> m ()
forall (m :: * -> *). GhcMonad m => HscEnv -> m ()
setSession (HscEnv -> m ()) -> m HscEnv -> m ()
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< IO HscEnv -> m HscEnv
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO ( do
#if !defined(javascript_HOST_ARCH)
    -- The call to c_keepCAFsForGHCi must not be optimized away. Even in non-debug builds.
    -- So we can't use assertM here.
    -- See Note [keepCAFsForGHCi] in keepCAFsForGHCi.c for details about why.
    !keep_cafs <- IO Bool
c_keepCAFsForGHCi
    massert keep_cafs
#endif
    initHscEnv mb_top_dir
  )

-- %************************************************************************
-- %*                                                                      *
--             Flags & settings
-- %*                                                                      *
-- %************************************************************************

-- $DynFlags
--
-- The GHC session maintains two sets of 'DynFlags':
--
--   * The "interactive" @DynFlags@, which are used for everything
--     related to interactive evaluation, including 'runStmt',
--     'runDecls', 'exprType', 'lookupName' and so on (everything
--     under \"Interactive evaluation\" in this module).
--
--   * The "program" @DynFlags@, which are used when loading
--     whole modules with 'load'
--
-- 'setInteractiveDynFlags', 'getInteractiveDynFlags' work with the
-- interactive @DynFlags@.
--
-- 'setProgramDynFlags', 'getProgramDynFlags' work with the
-- program @DynFlags@.
--
-- 'setSessionDynFlags' sets both @DynFlags@, and 'getSessionDynFlags'
-- retrieves the program @DynFlags@ (for backwards compatibility).

-- This is a compatibility function which sets dynflags for the top session
-- as well as the unit.
setSessionDynFlags :: (HasCallStack, GhcMonad m) => DynFlags -> m ()
setSessionDynFlags :: forall (m :: * -> *).
(HasCallStack, GhcMonad m) =>
DynFlags -> m ()
setSessionDynFlags DynFlags
dflags0 = do
  hsc_env <- m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession
  logger <- getLogger
  dflags <- checkNewDynFlags logger dflags0
  let all_uids = HscEnv -> Set UnitId
hsc_all_home_unit_ids HscEnv
hsc_env
  case S.toList all_uids of
    [UnitId
uid] -> do
      UnitId -> DynFlags -> m ()
forall (m :: * -> *). GhcMonad m => UnitId -> DynFlags -> m ()
setUnitDynFlagsNoCheck UnitId
uid DynFlags
dflags
      (HscEnv -> HscEnv) -> m ()
forall (m :: * -> *). GhcMonad m => (HscEnv -> HscEnv) -> m ()
modifySession (HscEnv -> HscEnv
hscUpdateLoggerFlags (HscEnv -> HscEnv) -> (HscEnv -> HscEnv) -> HscEnv -> HscEnv
forall b c a. (b -> c) -> (a -> b) -> a -> c
. HasDebugCallStack => UnitId -> HscEnv -> HscEnv
UnitId -> HscEnv -> HscEnv
hscSetActiveUnitId (DynFlags -> UnitId
homeUnitId_ DynFlags
dflags))
      dflags' <- m DynFlags
forall (m :: * -> *). HasDynFlags m => m DynFlags
getDynFlags
      setTopSessionDynFlags dflags'
    [] -> FilePath -> m ()
forall a. HasCallStack => FilePath -> a
panic FilePath
"nohue"
    [UnitId]
_ -> FilePath -> m ()
forall a. HasCallStack => FilePath -> a
panic FilePath
"setSessionDynFlags can only be used with a single home unit"


setUnitDynFlags :: GhcMonad m => UnitId -> DynFlags -> m ()
setUnitDynFlags :: forall (m :: * -> *). GhcMonad m => UnitId -> DynFlags -> m ()
setUnitDynFlags UnitId
uid DynFlags
dflags0 = do
  logger <- m Logger
forall (m :: * -> *). HasLogger m => m Logger
getLogger
  dflags1 <- checkNewDynFlags logger dflags0
  setUnitDynFlagsNoCheck uid dflags1

setUnitDynFlagsNoCheck :: GhcMonad m => UnitId -> DynFlags -> m ()
setUnitDynFlagsNoCheck :: forall (m :: * -> *). GhcMonad m => UnitId -> DynFlags -> m ()
setUnitDynFlagsNoCheck UnitId
uid DynFlags
dflags1 = do
  logger <- m Logger
forall (m :: * -> *). HasLogger m => m Logger
getLogger
  hsc_env <- getSession

  let old_hue = HasDebugCallStack => UnitId -> UnitEnv -> HomeUnitEnv
UnitId -> UnitEnv -> HomeUnitEnv
ue_findHomeUnitEnv UnitId
uid (HscEnv -> UnitEnv
hsc_unit_env HscEnv
hsc_env)
  let cached_unit_dbs = HomeUnitEnv -> Maybe [UnitDatabase UnitId]
homeUnitEnv_unit_dbs HomeUnitEnv
old_hue
  (dbs,unit_state,home_unit,mconstants) <- liftIO $ initUnits logger dflags1 cached_unit_dbs (hsc_all_home_unit_ids hsc_env)
  updated_dflags <- liftIO $ updatePlatformConstants dflags1 mconstants

  let upd HomeUnitEnv
hue =
       HomeUnitEnv
hue
          { homeUnitEnv_units = unit_state
          , homeUnitEnv_unit_dbs = Just dbs
          , homeUnitEnv_dflags = updated_dflags
          , homeUnitEnv_home_unit = Just home_unit
          }

  let unit_env = (HomeUnitEnv -> HomeUnitEnv) -> UnitId -> UnitEnv -> UnitEnv
ue_updateHomeUnitEnv HomeUnitEnv -> HomeUnitEnv
upd UnitId
uid (HscEnv -> UnitEnv
hsc_unit_env HscEnv
hsc_env)

  let dflags = DynFlags
updated_dflags

  let unit_env0 = UnitEnv
unit_env
        { ue_platform        = targetPlatform dflags
        , ue_namever         = ghcNameVersion dflags
        }

  -- if necessary, change the key for the currently active unit
  -- as the dynflags might have been changed

  -- This function is called on every --make invocation because at the start of
  -- the session there is one fake unit called main which is immediately replaced
  -- after the DynFlags are parsed.
  let !unit_env1 =
        if DynFlags -> UnitId
homeUnitId_ DynFlags
dflags UnitId -> UnitId -> Bool
forall a. Eq a => a -> a -> Bool
/= UnitId
uid
          then
            HasDebugCallStack => UnitId -> UnitId -> UnitEnv -> UnitEnv
UnitId -> UnitId -> UnitEnv -> UnitEnv
ue_renameUnitId
                  UnitId
uid
                  (DynFlags -> UnitId
homeUnitId_ DynFlags
dflags)
                  UnitEnv
unit_env0
          else UnitEnv
unit_env0

  modifySession $ \HscEnv
h -> HscEnv
h{ hsc_unit_env  = unit_env1
                         }

  invalidateModSummaryCache




setTopSessionDynFlags :: GhcMonad m => DynFlags -> m ()
setTopSessionDynFlags :: forall (m :: * -> *). GhcMonad m => DynFlags -> m ()
setTopSessionDynFlags DynFlags
dflags = do
  hsc_env <- m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession
  logger  <- getLogger
  lookup_cache  <- liftIO $ newMVar emptyUFM

  -- Interpreter
  interp <- if
    -- external interpreter
    | gopt Opt_ExternalInterpreter dflags
    -> do
         let
           prog = DynFlags -> FilePath
pgm_i DynFlags
dflags FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath
flavour
           profiled = DynFlags -> Ways
ways DynFlags
dflags Ways -> Way -> Bool
`hasWay` Way
WayProf
           dynamic  = DynFlags -> Ways
ways DynFlags
dflags Ways -> Way -> Bool
`hasWay` Way
WayDyn
           flavour
             | Bool
profiled Bool -> Bool -> Bool
&& Bool
dynamic = FilePath
"-prof-dyn"
             | Bool
profiled  = FilePath
"-prof"
             | Bool
dynamic   = FilePath
"-dyn"
             | Bool
otherwise = FilePath
""
           msg = FilePath -> SDoc
forall doc. IsLine doc => FilePath -> doc
text FilePath
"Starting " SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<> FilePath -> SDoc
forall doc. IsLine doc => FilePath -> doc
text FilePath
prog
         tr <- if verbosity dflags >= 3
                then return (logInfo logger $ withPprStyle defaultDumpStyle msg)
                else return (pure ())
         let
          conf = IServConfig
            { iservConfProgram :: FilePath
iservConfProgram  = FilePath
prog
            , iservConfOpts :: [FilePath]
iservConfOpts     = DynFlags -> (DynFlags -> [FilePath]) -> [FilePath]
forall a. DynFlags -> (DynFlags -> [a]) -> [a]
getOpts DynFlags
dflags DynFlags -> [FilePath]
opt_i
            , iservConfProfiled :: Bool
iservConfProfiled = Bool
profiled
            , iservConfDynamic :: Bool
iservConfDynamic  = Bool
dynamic
            , iservConfHook :: Maybe (CreateProcess -> IO ProcessHandle)
iservConfHook     = Hooks -> Maybe (CreateProcess -> IO ProcessHandle)
createIservProcessHook (HscEnv -> Hooks
hsc_hooks HscEnv
hsc_env)
            , iservConfTrace :: IO ()
iservConfTrace    = IO ()
tr
            }
         s <- liftIO $ newMVar InterpPending
         loader <- liftIO Loader.uninitializedLoader
         return (Just (Interp (ExternalInterp (ExtIServ (ExtInterpState conf s))) loader lookup_cache))

    -- JavaScript interpreter
    | ArchJavaScript <- platformArch (targetPlatform dflags)
    -> do
         s <- liftIO $ newMVar InterpPending
         loader <- liftIO Loader.uninitializedLoader
         let cfg = JSInterpConfig
              { jsInterpNodeConfig :: NodeJsSettings
jsInterpNodeConfig  = NodeJsSettings
defaultNodeJsSettings
              , jsInterpScript :: FilePath
jsInterpScript      = DynFlags -> FilePath
topDir DynFlags
dflags FilePath -> FilePath -> FilePath
</> FilePath
"ghc-interp.js"
              , jsInterpTmpFs :: TmpFs
jsInterpTmpFs       = HscEnv -> TmpFs
hsc_tmpfs HscEnv
hsc_env
              , jsInterpTmpDir :: TempDir
jsInterpTmpDir      = DynFlags -> TempDir
tmpDir DynFlags
dflags
              , jsInterpLogger :: Logger
jsInterpLogger      = HscEnv -> Logger
hsc_logger HscEnv
hsc_env
              , jsInterpCodegenCfg :: StgToJSConfig
jsInterpCodegenCfg  = DynFlags -> StgToJSConfig
initStgToJSConfig DynFlags
dflags
              , jsInterpUnitEnv :: UnitEnv
jsInterpUnitEnv     = HscEnv -> UnitEnv
hsc_unit_env HscEnv
hsc_env
              , jsInterpFinderOpts :: FinderOpts
jsInterpFinderOpts  = DynFlags -> FinderOpts
initFinderOpts DynFlags
dflags
              , jsInterpFinderCache :: FinderCache
jsInterpFinderCache = HscEnv -> FinderCache
hsc_FC HscEnv
hsc_env
              }
         return (Just (Interp (ExternalInterp (ExtJS (ExtInterpState cfg s))) loader lookup_cache))

    -- Internal interpreter
    | otherwise
    ->
#if defined(HAVE_INTERNAL_INTERPRETER)
     do
      loader <- liftIO Loader.uninitializedLoader
      return (Just (Interp InternalInterp loader lookup_cache))
#else
      return Nothing
#endif


  modifySession $ \HscEnv
h -> HasDebugCallStack => DynFlags -> HscEnv -> HscEnv
DynFlags -> HscEnv -> HscEnv
hscSetFlags DynFlags
dflags
                        HscEnv
h{ hsc_IC = (hsc_IC h){ ic_dflags = dflags }
                         , hsc_interp = hsc_interp h <|> interp
                         }

  invalidateModSummaryCache

-- | Sets the program 'DynFlags'.  Note: this invalidates the internal
-- cached module graph, causing more work to be done the next time
-- 'load' is called.
--
-- Returns a boolean indicating if preload units have changed and need to be
-- reloaded.
setProgramDynFlags :: GhcMonad m => DynFlags -> m Bool
setProgramDynFlags :: forall (m :: * -> *). GhcMonad m => DynFlags -> m Bool
setProgramDynFlags DynFlags
dflags = Bool -> DynFlags -> m Bool
forall (m :: * -> *). GhcMonad m => Bool -> DynFlags -> m Bool
setProgramDynFlags_ Bool
True DynFlags
dflags

setProgramDynFlags_ :: GhcMonad m => Bool -> DynFlags -> m Bool
setProgramDynFlags_ :: forall (m :: * -> *). GhcMonad m => Bool -> DynFlags -> m Bool
setProgramDynFlags_ Bool
invalidate_needed DynFlags
dflags = do
  logger <- m Logger
forall (m :: * -> *). HasLogger m => m Logger
getLogger
  dflags0 <- checkNewDynFlags logger dflags
  dflags_prev <- getProgramDynFlags
  let changed = DynFlags -> DynFlags -> Bool
packageFlagsChanged DynFlags
dflags_prev DynFlags
dflags0
  if changed
    then do
        -- additionally, set checked dflags so we don't lose fixes
        old_unit_env <- ue_setFlags dflags0 . hsc_unit_env <$> getSession

        home_unit_graph <- forM (ue_home_unit_graph old_unit_env) $ \HomeUnitEnv
homeUnitEnv -> do
          let cached_unit_dbs :: Maybe [UnitDatabase UnitId]
cached_unit_dbs = HomeUnitEnv -> Maybe [UnitDatabase UnitId]
homeUnitEnv_unit_dbs HomeUnitEnv
homeUnitEnv
              dflags :: DynFlags
dflags = HomeUnitEnv -> DynFlags
homeUnitEnv_dflags HomeUnitEnv
homeUnitEnv
              old_hpt :: HomePackageTable
old_hpt = HomeUnitEnv -> HomePackageTable
homeUnitEnv_hpt HomeUnitEnv
homeUnitEnv
              home_units :: Set UnitId
home_units = UnitEnvGraph HomeUnitEnv -> Set UnitId
forall v. UnitEnvGraph v -> Set UnitId
unitEnv_keys (UnitEnv -> UnitEnvGraph HomeUnitEnv
ue_home_unit_graph UnitEnv
old_unit_env)

          (dbs,unit_state,home_unit,mconstants) <- IO
  ([UnitDatabase UnitId], UnitState, HomeUnit,
   Maybe PlatformConstants)
-> m ([UnitDatabase UnitId], UnitState, HomeUnit,
      Maybe PlatformConstants)
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO
   ([UnitDatabase UnitId], UnitState, HomeUnit,
    Maybe PlatformConstants)
 -> m ([UnitDatabase UnitId], UnitState, HomeUnit,
       Maybe PlatformConstants))
-> IO
     ([UnitDatabase UnitId], UnitState, HomeUnit,
      Maybe PlatformConstants)
-> m ([UnitDatabase UnitId], UnitState, HomeUnit,
      Maybe PlatformConstants)
forall a b. (a -> b) -> a -> b
$ Logger
-> DynFlags
-> Maybe [UnitDatabase UnitId]
-> Set UnitId
-> IO
     ([UnitDatabase UnitId], UnitState, HomeUnit,
      Maybe PlatformConstants)
initUnits Logger
logger DynFlags
dflags Maybe [UnitDatabase UnitId]
cached_unit_dbs Set UnitId
home_units

          updated_dflags <- liftIO $ updatePlatformConstants dflags0 mconstants
          pure HomeUnitEnv
            { homeUnitEnv_units = unit_state
            , homeUnitEnv_unit_dbs = Just dbs
            , homeUnitEnv_dflags = updated_dflags
            , homeUnitEnv_hpt = old_hpt
            , homeUnitEnv_home_unit = Just home_unit
            }

        let dflags1 = HomeUnitEnv -> DynFlags
homeUnitEnv_dflags (HomeUnitEnv -> DynFlags) -> HomeUnitEnv -> DynFlags
forall a b. (a -> b) -> a -> b
$ UnitId -> UnitEnvGraph HomeUnitEnv -> HomeUnitEnv
forall v. UnitId -> UnitEnvGraph v -> v
unitEnv_lookup (UnitEnv -> UnitId
ue_currentUnit UnitEnv
old_unit_env) UnitEnvGraph HomeUnitEnv
home_unit_graph
        let unit_env = UnitEnv
              { ue_platform :: Platform
ue_platform        = DynFlags -> Platform
targetPlatform DynFlags
dflags1
              , ue_namever :: GhcNameVersion
ue_namever         = DynFlags -> GhcNameVersion
ghcNameVersion DynFlags
dflags1
              , ue_home_unit_graph :: UnitEnvGraph HomeUnitEnv
ue_home_unit_graph = UnitEnvGraph HomeUnitEnv
home_unit_graph
              , ue_current_unit :: UnitId
ue_current_unit    = UnitEnv -> UnitId
ue_currentUnit UnitEnv
old_unit_env
              , ue_eps :: ExternalUnitCache
ue_eps             = UnitEnv -> ExternalUnitCache
ue_eps UnitEnv
old_unit_env
              }
        modifySession $ \HscEnv
h -> HasDebugCallStack => DynFlags -> HscEnv -> HscEnv
DynFlags -> HscEnv -> HscEnv
hscSetFlags DynFlags
dflags1 HscEnv
h{ hsc_unit_env = unit_env }
    else modifySession (hscSetFlags dflags0)

  when invalidate_needed $ invalidateModSummaryCache
  return changed


-- When changing the DynFlags, we want the changes to apply to future
-- loads, but without completely discarding the program.  But the
-- DynFlags are cached in each ModSummary in the hsc_mod_graph, so
-- after a change to DynFlags, the changes would apply to new modules
-- but not existing modules; this seems undesirable.
--
-- Furthermore, the GHC API client might expect that changing
-- log_action would affect future compilation messages, but for those
-- modules we have cached ModSummaries for, we'll continue to use the
-- old log_action.  This is definitely wrong (#7478).
--
-- Hence, we invalidate the ModSummary cache after changing the
-- DynFlags.  We do this by tweaking the hash on each ModSummary, so
-- that the next downsweep will think that all the files have changed
-- and preprocess them again.  This won't necessarily cause everything
-- to be recompiled, because by the time we check whether we need to
-- recompile a module, we'll have re-summarised the module and have a
-- correct ModSummary.
--
invalidateModSummaryCache :: GhcMonad m => m ()
invalidateModSummaryCache :: forall (m :: * -> *). GhcMonad m => m ()
invalidateModSummaryCache =
  (HscEnv -> HscEnv) -> m ()
forall (m :: * -> *). GhcMonad m => (HscEnv -> HscEnv) -> m ()
modifySession ((HscEnv -> HscEnv) -> m ()) -> (HscEnv -> HscEnv) -> m ()
forall a b. (a -> b) -> a -> b
$ \HscEnv
h -> HscEnv
h { hsc_mod_graph = mapMG inval (hsc_mod_graph h) }
 where
  inval :: ModSummary -> ModSummary
inval ModSummary
ms = ModSummary
ms { ms_hs_hash = fingerprint0 }

-- | Returns the program 'DynFlags'.
getProgramDynFlags :: GhcMonad m => m DynFlags
getProgramDynFlags :: forall (m :: * -> *). GhcMonad m => m DynFlags
getProgramDynFlags = m DynFlags
forall (m :: * -> *). GhcMonad m => m DynFlags
getSessionDynFlags

-- | Set the 'DynFlags' used to evaluate interactive expressions.
-- Also initialise (load) plugins.
--
-- Note: this cannot be used for changes to packages.  Use
-- 'setSessionDynFlags', or 'setProgramDynFlags' and then copy the
-- 'unitState' into the interactive @DynFlags@.
setInteractiveDynFlags :: GhcMonad m => DynFlags -> m ()
setInteractiveDynFlags :: forall (m :: * -> *). GhcMonad m => DynFlags -> m ()
setInteractiveDynFlags DynFlags
dflags = do
  logger <- m Logger
forall (m :: * -> *). HasLogger m => m Logger
getLogger
  dflags' <- checkNewDynFlags logger dflags
  dflags'' <- checkNewInteractiveDynFlags logger dflags'
  modifySessionM $ \HscEnv
hsc_env0 -> do
    let ic0 :: InteractiveContext
ic0 = HscEnv -> InteractiveContext
hsc_IC HscEnv
hsc_env0

    -- Initialise (load) plugins in the interactive environment with the new
    -- DynFlags
    plugin_env <- IO HscEnv -> m HscEnv
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO HscEnv -> m HscEnv) -> IO HscEnv -> m HscEnv
forall a b. (a -> b) -> a -> b
$ HscEnv -> IO HscEnv
initializePlugins (HscEnv -> IO HscEnv) -> HscEnv -> IO HscEnv
forall a b. (a -> b) -> a -> b
$ HscEnv -> HscEnv
mkInteractiveHscEnv (HscEnv -> HscEnv) -> HscEnv -> HscEnv
forall a b. (a -> b) -> a -> b
$
                    HscEnv
hsc_env0 { hsc_IC = ic0 { ic_dflags = dflags'' }}

    -- Update both plugins cache and DynFlags in the interactive context.
    return $ hsc_env0
                { hsc_IC = ic0
                    { ic_plugins = hsc_plugins plugin_env
                    , ic_dflags  = hsc_dflags  plugin_env
                    }
                }


-- | Get the 'DynFlags' used to evaluate interactive expressions.
getInteractiveDynFlags :: GhcMonad m => m DynFlags
getInteractiveDynFlags :: forall (m :: * -> *). GhcMonad m => m DynFlags
getInteractiveDynFlags = (HscEnv -> m DynFlags) -> m DynFlags
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m DynFlags) -> m DynFlags)
-> (HscEnv -> m DynFlags) -> m DynFlags
forall a b. (a -> b) -> a -> b
$ \HscEnv
h -> DynFlags -> m DynFlags
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (InteractiveContext -> DynFlags
ic_dflags (HscEnv -> InteractiveContext
hsc_IC HscEnv
h))


parseDynamicFlags
    :: MonadIO m
    => Logger
    -> DynFlags
    -> [Located String]
    -> m (DynFlags, [Located String], Messages DriverMessage)
parseDynamicFlags :: forall (m :: * -> *).
MonadIO m =>
Logger
-> DynFlags
-> [Located FilePath]
-> m (DynFlags, [Located FilePath], Messages DriverMessage)
parseDynamicFlags Logger
logger DynFlags
dflags [Located FilePath]
cmdline = do
  (dflags1, leftovers, warns) <- DynFlags
-> [Located FilePath]
-> m (DynFlags, [Located FilePath], Messages DriverMessage)
forall (m :: * -> *).
MonadIO m =>
DynFlags
-> [Located FilePath]
-> m (DynFlags, [Located FilePath], Messages DriverMessage)
parseDynamicFlagsCmdLine DynFlags
dflags [Located FilePath]
cmdline
  -- flags that have just been read are used by the logger when loading package
  -- env (this is checked by T16318)
  let logger1 = Logger -> LogFlags -> Logger
setLogFlags Logger
logger (DynFlags -> LogFlags
initLogFlags DynFlags
dflags1)
  dflags2 <- liftIO $ interpretPackageEnv logger1 dflags1
  return (dflags2, leftovers, warns)

-- | Parse command line arguments that look like files.
-- First normalises its arguments and then splits them into source files
-- and object files.
-- A source file can be turned into a 'Target' via 'guessTarget'
parseTargetFiles :: DynFlags -> [String] -> (DynFlags, [(String, Maybe Phase)], [String])
parseTargetFiles :: DynFlags
-> [FilePath] -> (DynFlags, [(FilePath, Maybe Phase)], [FilePath])
parseTargetFiles DynFlags
dflags0 [FilePath]
fileish_args =
  let
    normal_fileish_paths :: [FilePath]
normal_fileish_paths = (FilePath -> FilePath) -> [FilePath] -> [FilePath]
forall a b. (a -> b) -> [a] -> [b]
map FilePath -> FilePath
normalise_hyp [FilePath]
fileish_args
    ([(FilePath, Maybe Phase)]
srcs, [FilePath]
raw_objs)         = [FilePath]
-> [(FilePath, Maybe Phase)]
-> [FilePath]
-> ([(FilePath, Maybe Phase)], [FilePath])
partition_args [FilePath]
normal_fileish_paths [] []
    objs :: [FilePath]
objs = (FilePath -> FilePath) -> [FilePath] -> [FilePath]
forall a b. (a -> b) -> [a] -> [b]
map (DynFlags -> FilePath -> FilePath
augmentByWorkingDirectory DynFlags
dflags0) [FilePath]
raw_objs

    dflags1 :: DynFlags
dflags1 = DynFlags
dflags0 { ldInputs = map (FileOption "") objs
                                   ++ ldInputs dflags0 }
    {-
      We split out the object files (.o, .dll) and add them
      to ldInputs for use by the linker.

      The following things should be considered compilation manager inputs:

       - haskell source files (strings ending in .hs, .lhs or other
         haskellish extension),

       - module names (not forgetting hierarchical module names),

       - things beginning with '-' are flags that were not recognised by
         the flag parser, and we want them to generate errors later in
         checkOptions, so we class them as source files (#5921)

       - and finally we consider everything without an extension to be
         a comp manager input, as shorthand for a .hs or .lhs filename.

      Everything else is considered to be a linker object, and passed
      straight through to the linker.
    -}
  in (DynFlags
dflags1, [(FilePath, Maybe Phase)]
srcs, [FilePath]
objs)

-- -----------------------------------------------------------------------------

-- | Splitting arguments into source files and object files.  This is where we
-- interpret the -x <suffix> option, and attach a (Maybe Phase) to each source
-- file indicating the phase specified by the -x option in force, if any.
partition_args :: [String] -> [(String, Maybe Phase)] -> [String]
               -> ([(String, Maybe Phase)], [String])
partition_args :: [FilePath]
-> [(FilePath, Maybe Phase)]
-> [FilePath]
-> ([(FilePath, Maybe Phase)], [FilePath])
partition_args [] [(FilePath, Maybe Phase)]
srcs [FilePath]
objs = ([(FilePath, Maybe Phase)] -> [(FilePath, Maybe Phase)]
forall a. [a] -> [a]
reverse [(FilePath, Maybe Phase)]
srcs, [FilePath] -> [FilePath]
forall a. [a] -> [a]
reverse [FilePath]
objs)
partition_args (FilePath
"-x":FilePath
suff:[FilePath]
args) [(FilePath, Maybe Phase)]
srcs [FilePath]
objs
  | FilePath
"none" <- FilePath
suff      = [FilePath]
-> [(FilePath, Maybe Phase)]
-> [FilePath]
-> ([(FilePath, Maybe Phase)], [FilePath])
partition_args [FilePath]
args [(FilePath, Maybe Phase)]
srcs [FilePath]
objs
  | Phase
StopLn <- Phase
phase     = [FilePath]
-> [(FilePath, Maybe Phase)]
-> [FilePath]
-> ([(FilePath, Maybe Phase)], [FilePath])
partition_args [FilePath]
args [(FilePath, Maybe Phase)]
srcs ([FilePath]
slurp [FilePath] -> [FilePath] -> [FilePath]
forall a. [a] -> [a] -> [a]
++ [FilePath]
objs)
  | Bool
otherwise           = [FilePath]
-> [(FilePath, Maybe Phase)]
-> [FilePath]
-> ([(FilePath, Maybe Phase)], [FilePath])
partition_args [FilePath]
rest ([(FilePath, Maybe Phase)]
these_srcs [(FilePath, Maybe Phase)]
-> [(FilePath, Maybe Phase)] -> [(FilePath, Maybe Phase)]
forall a. [a] -> [a] -> [a]
++ [(FilePath, Maybe Phase)]
srcs) [FilePath]
objs
        where phase :: Phase
phase = FilePath -> Phase
startPhase FilePath
suff
              ([FilePath]
slurp,[FilePath]
rest) = (FilePath -> Bool) -> [FilePath] -> ([FilePath], [FilePath])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break (FilePath -> FilePath -> Bool
forall a. Eq a => a -> a -> Bool
== FilePath
"-x") [FilePath]
args
              these_srcs :: [(FilePath, Maybe Phase)]
these_srcs = [FilePath] -> [Maybe Phase] -> [(FilePath, Maybe Phase)]
forall a b. [a] -> [b] -> [(a, b)]
zip [FilePath]
slurp (Maybe Phase -> [Maybe Phase]
forall a. a -> [a]
repeat (Phase -> Maybe Phase
forall a. a -> Maybe a
Just Phase
phase))
partition_args (FilePath
arg:[FilePath]
args) [(FilePath, Maybe Phase)]
srcs [FilePath]
objs
  | FilePath -> Bool
looks_like_an_input FilePath
arg = [FilePath]
-> [(FilePath, Maybe Phase)]
-> [FilePath]
-> ([(FilePath, Maybe Phase)], [FilePath])
partition_args [FilePath]
args ((FilePath
arg,Maybe Phase
forall a. Maybe a
Nothing)(FilePath, Maybe Phase)
-> [(FilePath, Maybe Phase)] -> [(FilePath, Maybe Phase)]
forall a. a -> [a] -> [a]
:[(FilePath, Maybe Phase)]
srcs) [FilePath]
objs
  | Bool
otherwise               = [FilePath]
-> [(FilePath, Maybe Phase)]
-> [FilePath]
-> ([(FilePath, Maybe Phase)], [FilePath])
partition_args [FilePath]
args [(FilePath, Maybe Phase)]
srcs (FilePath
argFilePath -> [FilePath] -> [FilePath]
forall a. a -> [a] -> [a]
:[FilePath]
objs)


looks_like_an_input :: String -> Bool
looks_like_an_input :: FilePath -> Bool
looks_like_an_input FilePath
m =  FilePath -> Bool
isSourceFilename FilePath
m
                      Bool -> Bool -> Bool
|| FilePath -> Bool
looksLikeModuleName FilePath
m
                      Bool -> Bool -> Bool
|| FilePath
"-" FilePath -> FilePath -> Bool
forall a. Eq a => [a] -> [a] -> Bool
`isPrefixOf` FilePath
m
                      Bool -> Bool -> Bool
|| Bool -> Bool
not (FilePath -> Bool
hasExtension FilePath
m)


-- | To simplify the handling of filepaths, we normalise all filepaths right
-- away. Note the asymmetry of FilePath.normalise:
--    Linux:   p\/q -> p\/q; p\\q -> p\\q
--    Windows: p\/q -> p\\q; p\\q -> p\\q
-- #12674: Filenames starting with a hyphen get normalised from ./-foo.hs
-- to -foo.hs. We have to re-prepend the current directory.
normalise_hyp :: FilePath -> FilePath
normalise_hyp :: FilePath -> FilePath
normalise_hyp FilePath
fp
  | Bool
strt_dot_sl Bool -> Bool -> Bool
&& FilePath
"-" FilePath -> FilePath -> Bool
forall a. Eq a => [a] -> [a] -> Bool
`isPrefixOf` FilePath
nfp = FilePath
cur_dir FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath
nfp
  | Bool
otherwise                           = FilePath
nfp
  where
#if defined(mingw32_HOST_OS)
    strt_dot_sl = "./" `isPrefixOf` fp || ".\\" `isPrefixOf` fp
#else
    strt_dot_sl :: Bool
strt_dot_sl = FilePath
"./" FilePath -> FilePath -> Bool
forall a. Eq a => [a] -> [a] -> Bool
`isPrefixOf` FilePath
fp
#endif
    cur_dir :: FilePath
cur_dir = Char
'.' Char -> FilePath -> FilePath
forall a. a -> [a] -> [a]
: [Char
pathSeparator]
    nfp :: FilePath
nfp = FilePath -> FilePath
normalise FilePath
fp

-----------------------------------------------------------------------------

-- | Checks the set of new DynFlags for possibly erroneous option
-- combinations when invoking 'setSessionDynFlags' and friends, and if
-- found, returns a fixed copy (if possible).
checkNewDynFlags :: MonadIO m => Logger -> DynFlags -> m DynFlags
checkNewDynFlags :: forall (m :: * -> *). MonadIO m => Logger -> DynFlags -> m DynFlags
checkNewDynFlags Logger
logger DynFlags
dflags = do
  -- See Note [DynFlags consistency]
  let (DynFlags
dflags', [Warn]
warnings) = DynFlags -> (DynFlags, [Warn])
makeDynFlagsConsistent DynFlags
dflags
  let diag_opts :: DiagOpts
diag_opts = DynFlags -> DiagOpts
initDiagOpts DynFlags
dflags
      print_config :: DiagnosticOpts GhcMessage
print_config = DynFlags -> DiagnosticOpts GhcMessage
initPrintConfig DynFlags
dflags
  IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ Logger
-> GhcMessageOpts -> DiagOpts -> Messages GhcMessage -> IO ()
printOrThrowDiagnostics Logger
logger DiagnosticOpts GhcMessage
GhcMessageOpts
print_config DiagOpts
diag_opts
    (Messages GhcMessage -> IO ()) -> Messages GhcMessage -> IO ()
forall a b. (a -> b) -> a -> b
$ (DriverMessage -> GhcMessage)
-> Messages DriverMessage -> Messages GhcMessage
forall a b. (a -> b) -> Messages a -> Messages b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap DriverMessage -> GhcMessage
GhcDriverMessage (Messages DriverMessage -> Messages GhcMessage)
-> Messages DriverMessage -> Messages GhcMessage
forall a b. (a -> b) -> a -> b
$ DiagOpts -> [Warn] -> Messages DriverMessage
warnsToMessages DiagOpts
diag_opts [Warn]
warnings
  DynFlags -> m DynFlags
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return DynFlags
dflags'

checkNewInteractiveDynFlags :: MonadIO m => Logger -> DynFlags -> m DynFlags
checkNewInteractiveDynFlags :: forall (m :: * -> *). MonadIO m => Logger -> DynFlags -> m DynFlags
checkNewInteractiveDynFlags Logger
logger DynFlags
dflags0 = do
  -- We currently don't support use of StaticPointers in expressions entered on
  -- the REPL. See #12356.
  if Extension -> DynFlags -> Bool
xopt Extension
LangExt.StaticPointers DynFlags
dflags0
  then do
    let diag_opts :: DiagOpts
diag_opts = DynFlags -> DiagOpts
initDiagOpts DynFlags
dflags0
        print_config :: DiagnosticOpts GhcMessage
print_config = DynFlags -> DiagnosticOpts GhcMessage
initPrintConfig DynFlags
dflags0
    IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ Logger
-> GhcMessageOpts -> DiagOpts -> Messages GhcMessage -> IO ()
printOrThrowDiagnostics Logger
logger DiagnosticOpts GhcMessage
GhcMessageOpts
print_config DiagOpts
diag_opts (Messages GhcMessage -> IO ()) -> Messages GhcMessage -> IO ()
forall a b. (a -> b) -> a -> b
$ MsgEnvelope GhcMessage -> Messages GhcMessage
forall e. MsgEnvelope e -> Messages e
singleMessage
      (MsgEnvelope GhcMessage -> Messages GhcMessage)
-> MsgEnvelope GhcMessage -> Messages GhcMessage
forall a b. (a -> b) -> a -> b
$ (DriverMessage -> GhcMessage)
-> MsgEnvelope DriverMessage -> MsgEnvelope GhcMessage
forall a b. (a -> b) -> MsgEnvelope a -> MsgEnvelope b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap DriverMessage -> GhcMessage
GhcDriverMessage
      (MsgEnvelope DriverMessage -> MsgEnvelope GhcMessage)
-> MsgEnvelope DriverMessage -> MsgEnvelope GhcMessage
forall a b. (a -> b) -> a -> b
$ DiagOpts -> SrcSpan -> DriverMessage -> MsgEnvelope DriverMessage
forall e. Diagnostic e => DiagOpts -> SrcSpan -> e -> MsgEnvelope e
mkPlainMsgEnvelope DiagOpts
diag_opts SrcSpan
interactiveSrcSpan DriverMessage
DriverStaticPointersNotSupported
    DynFlags -> m DynFlags
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (DynFlags -> m DynFlags) -> DynFlags -> m DynFlags
forall a b. (a -> b) -> a -> b
$ DynFlags -> Extension -> DynFlags
xopt_unset DynFlags
dflags0 Extension
LangExt.StaticPointers
  else DynFlags -> m DynFlags
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return DynFlags
dflags0


-- %************************************************************************
-- %*                                                                      *
--             Setting, getting, and modifying the targets
-- %*                                                                      *
-- %************************************************************************

-- ToDo: think about relative vs. absolute file paths. And what
-- happens when the current directory changes.

-- | Sets the targets for this session.  Each target may be a module name
-- or a filename.  The targets correspond to the set of root modules for
-- the program\/library.  Unloading the current program is achieved by
-- setting the current set of targets to be empty, followed by 'load'.
setTargets :: GhcMonad m => [Target] -> m ()
setTargets :: forall (m :: * -> *). GhcMonad m => [Target] -> m ()
setTargets [Target]
targets = (HscEnv -> HscEnv) -> m ()
forall (m :: * -> *). GhcMonad m => (HscEnv -> HscEnv) -> m ()
modifySession (\HscEnv
h -> HscEnv
h{ hsc_targets = targets })

-- | Returns the current set of targets
getTargets :: GhcMonad m => m [Target]
getTargets :: forall (m :: * -> *). GhcMonad m => m [Target]
getTargets = (HscEnv -> m [Target]) -> m [Target]
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ([Target] -> m [Target]
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return ([Target] -> m [Target])
-> (HscEnv -> [Target]) -> HscEnv -> m [Target]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. HscEnv -> [Target]
hsc_targets)

-- | Add another target.
addTarget :: GhcMonad m => Target -> m ()
addTarget :: forall (m :: * -> *). GhcMonad m => Target -> m ()
addTarget Target
target
  = (HscEnv -> HscEnv) -> m ()
forall (m :: * -> *). GhcMonad m => (HscEnv -> HscEnv) -> m ()
modifySession (\HscEnv
h -> HscEnv
h{ hsc_targets = target : hsc_targets h })

-- | Remove a target
removeTarget :: GhcMonad m => TargetId -> m ()
removeTarget :: forall (m :: * -> *). GhcMonad m => TargetId -> m ()
removeTarget TargetId
target_id
  = (HscEnv -> HscEnv) -> m ()
forall (m :: * -> *). GhcMonad m => (HscEnv -> HscEnv) -> m ()
modifySession (\HscEnv
h -> HscEnv
h{ hsc_targets = filter (hsc_targets h) })
  where
   filter :: [Target] -> [Target]
filter [Target]
targets = [ Target
t | t :: Target
t@Target { targetId :: Target -> TargetId
targetId = TargetId
id } <- [Target]
targets, TargetId
id TargetId -> TargetId -> Bool
forall a. Eq a => a -> a -> Bool
/= TargetId
target_id ]

-- | Attempts to guess what Target a string refers to.  This function
-- implements the @--make@/GHCi command-line syntax for filenames:
--
--   - if the string looks like a Haskell source filename, then interpret it
--     as such
--
--   - if adding a .hs or .lhs suffix yields the name of an existing file,
--     then use that
--
--   - otherwise interpret the string as a module name
--
guessTarget :: GhcMonad m => String -> Maybe UnitId -> Maybe Phase -> m Target
guessTarget :: forall (m :: * -> *).
GhcMonad m =>
FilePath -> Maybe UnitId -> Maybe Phase -> m Target
guessTarget FilePath
str Maybe UnitId
mUnitId (Just Phase
phase)
   = do
     tuid <- Maybe UnitId -> m UnitId
forall (m :: * -> *). GhcMonad m => Maybe UnitId -> m UnitId
unitIdOrHomeUnit Maybe UnitId
mUnitId
     return (Target (TargetFile str (Just phase)) True tuid Nothing)
guessTarget FilePath
str Maybe UnitId
mUnitId Maybe Phase
Nothing
   | FilePath -> Bool
isHaskellSrcFilename FilePath
file
   = TargetId -> m Target
target (FilePath -> Maybe Phase -> TargetId
TargetFile FilePath
file Maybe Phase
forall a. Maybe a
Nothing)
   | Bool
otherwise
   = do exists <- IO Bool -> m Bool
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Bool -> m Bool) -> IO Bool -> m Bool
forall a b. (a -> b) -> a -> b
$ FilePath -> IO Bool
doesFileExist FilePath
hs_file
        if exists
           then target (TargetFile hs_file Nothing)
           else do
        exists <- liftIO $ doesFileExist lhs_file
        if exists
           then target (TargetFile lhs_file Nothing)
           else do
        if looksLikeModuleName file
           then target (TargetModule (mkModuleName file))
           else do
        dflags <- getDynFlags
        liftIO $ throwGhcExceptionIO
                 (ProgramError (showSDoc dflags $
                 text "target" <+> quotes (text file) <+>
                 text "is not a module name or a source file"))
     where
         (FilePath
file,Bool
obj_allowed)
                | Char
'*':FilePath
rest <- FilePath
str = (FilePath
rest, Bool
False)
                | Bool
otherwise       = (FilePath
str,  Bool
True)

         hs_file :: FilePath
hs_file  = FilePath
file FilePath -> FilePath -> FilePath
<.> FilePath
"hs"
         lhs_file :: FilePath
lhs_file = FilePath
file FilePath -> FilePath -> FilePath
<.> FilePath
"lhs"

         target :: TargetId -> m Target
target TargetId
tid = do
           tuid <- Maybe UnitId -> m UnitId
forall (m :: * -> *). GhcMonad m => Maybe UnitId -> m UnitId
unitIdOrHomeUnit Maybe UnitId
mUnitId
           pure $ Target tid obj_allowed tuid Nothing

-- | Unwrap 'UnitId' or retrieve the 'UnitId'
-- of the current 'HomeUnit'.
unitIdOrHomeUnit :: GhcMonad m => Maybe UnitId -> m UnitId
unitIdOrHomeUnit :: forall (m :: * -> *). GhcMonad m => Maybe UnitId -> m UnitId
unitIdOrHomeUnit Maybe UnitId
mUnitId = do
  currentHomeUnitId <- HomeUnit -> UnitId
forall u. GenHomeUnit u -> UnitId
homeUnitId (HomeUnit -> UnitId) -> (HscEnv -> HomeUnit) -> HscEnv -> UnitId
forall b c a. (b -> c) -> (a -> b) -> a -> c
. HscEnv -> HomeUnit
hsc_home_unit (HscEnv -> UnitId) -> m HscEnv -> m UnitId
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession
  pure (fromMaybe currentHomeUnitId mUnitId)

-- | Inform GHC that the working directory has changed.  GHC will flush
-- its cache of module locations, since it may no longer be valid.
--
-- Note: Before changing the working directory make sure all threads running
-- in the same session have stopped.  If you change the working directory,
-- you should also unload the current program (set targets to empty,
-- followed by load).
workingDirectoryChanged :: GhcMonad m => m ()
workingDirectoryChanged :: forall (m :: * -> *). GhcMonad m => m ()
workingDirectoryChanged = do
  hsc_env <- m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession
  liftIO $ flushFinderCaches (hsc_FC hsc_env) (hsc_unit_env hsc_env)


-- %************************************************************************
-- %*                                                                      *
--             Running phases one at a time
-- %*                                                                      *
-- %************************************************************************

class ParsedMod m where
  modSummary   :: m -> ModSummary
  parsedSource :: m -> ParsedSource

class ParsedMod m => TypecheckedMod m where
  renamedSource     :: m -> Maybe RenamedSource
  typecheckedSource :: m -> TypecheckedSource
  moduleInfo        :: m -> ModuleInfo
  tm_internals      :: m -> (TcGblEnv, ModDetails)
        -- ToDo: improvements that could be made here:
        --  if the module succeeded renaming but not typechecking,
        --  we can still get back the GlobalRdrEnv and exports, so
        --  perhaps the ModuleInfo should be split up into separate
        --  fields.

class TypecheckedMod m => DesugaredMod m where
  coreModule :: m -> ModGuts

-- | The result of successful parsing.
data ParsedModule =
  ParsedModule { ParsedModule -> ModSummary
pm_mod_summary   :: ModSummary
               , ParsedModule -> ParsedSource
pm_parsed_source :: ParsedSource
               , ParsedModule -> [FilePath]
pm_extra_src_files :: [FilePath] }

instance ParsedMod ParsedModule where
  modSummary :: ParsedModule -> ModSummary
modSummary ParsedModule
m    = ParsedModule -> ModSummary
pm_mod_summary ParsedModule
m
  parsedSource :: ParsedModule -> ParsedSource
parsedSource ParsedModule
m = ParsedModule -> ParsedSource
pm_parsed_source ParsedModule
m

-- | The result of successful typechecking.  It also contains the parser
--   result.
data TypecheckedModule =
  TypecheckedModule { TypecheckedModule -> ParsedModule
tm_parsed_module       :: ParsedModule
                    , TypecheckedModule -> Maybe RenamedSource
tm_renamed_source      :: Maybe RenamedSource
                    , TypecheckedModule -> TypecheckedSource
tm_typechecked_source  :: TypecheckedSource
                    , TypecheckedModule -> ModuleInfo
tm_checked_module_info :: ModuleInfo
                    , TypecheckedModule -> (TcGblEnv, ModDetails)
tm_internals_          :: (TcGblEnv, ModDetails)
                    }

instance ParsedMod TypecheckedModule where
  modSummary :: TypecheckedModule -> ModSummary
modSummary TypecheckedModule
m   = ParsedModule -> ModSummary
forall m. ParsedMod m => m -> ModSummary
modSummary (TypecheckedModule -> ParsedModule
tm_parsed_module TypecheckedModule
m)
  parsedSource :: TypecheckedModule -> ParsedSource
parsedSource TypecheckedModule
m = ParsedModule -> ParsedSource
forall m. ParsedMod m => m -> ParsedSource
parsedSource (TypecheckedModule -> ParsedModule
tm_parsed_module TypecheckedModule
m)

instance TypecheckedMod TypecheckedModule where
  renamedSource :: TypecheckedModule -> Maybe RenamedSource
renamedSource TypecheckedModule
m     = TypecheckedModule -> Maybe RenamedSource
tm_renamed_source TypecheckedModule
m
  typecheckedSource :: TypecheckedModule -> TypecheckedSource
typecheckedSource TypecheckedModule
m = TypecheckedModule -> TypecheckedSource
tm_typechecked_source TypecheckedModule
m
  moduleInfo :: TypecheckedModule -> ModuleInfo
moduleInfo TypecheckedModule
m        = TypecheckedModule -> ModuleInfo
tm_checked_module_info TypecheckedModule
m
  tm_internals :: TypecheckedModule -> (TcGblEnv, ModDetails)
tm_internals TypecheckedModule
m      = TypecheckedModule -> (TcGblEnv, ModDetails)
tm_internals_ TypecheckedModule
m

-- | The result of successful desugaring (i.e., translation to core).  Also
--  contains all the information of a typechecked module.
data DesugaredModule =
  DesugaredModule { DesugaredModule -> TypecheckedModule
dm_typechecked_module :: TypecheckedModule
                  , DesugaredModule -> ModGuts
dm_core_module        :: ModGuts
             }

instance ParsedMod DesugaredModule where
  modSummary :: DesugaredModule -> ModSummary
modSummary DesugaredModule
m   = TypecheckedModule -> ModSummary
forall m. ParsedMod m => m -> ModSummary
modSummary (DesugaredModule -> TypecheckedModule
dm_typechecked_module DesugaredModule
m)
  parsedSource :: DesugaredModule -> ParsedSource
parsedSource DesugaredModule
m = TypecheckedModule -> ParsedSource
forall m. ParsedMod m => m -> ParsedSource
parsedSource (DesugaredModule -> TypecheckedModule
dm_typechecked_module DesugaredModule
m)

instance TypecheckedMod DesugaredModule where
  renamedSource :: DesugaredModule -> Maybe RenamedSource
renamedSource DesugaredModule
m     = TypecheckedModule -> Maybe RenamedSource
forall m. TypecheckedMod m => m -> Maybe RenamedSource
renamedSource (DesugaredModule -> TypecheckedModule
dm_typechecked_module DesugaredModule
m)
  typecheckedSource :: DesugaredModule -> TypecheckedSource
typecheckedSource DesugaredModule
m = TypecheckedModule -> TypecheckedSource
forall m. TypecheckedMod m => m -> TypecheckedSource
typecheckedSource (DesugaredModule -> TypecheckedModule
dm_typechecked_module DesugaredModule
m)
  moduleInfo :: DesugaredModule -> ModuleInfo
moduleInfo DesugaredModule
m        = TypecheckedModule -> ModuleInfo
forall m. TypecheckedMod m => m -> ModuleInfo
moduleInfo (DesugaredModule -> TypecheckedModule
dm_typechecked_module DesugaredModule
m)
  tm_internals :: DesugaredModule -> (TcGblEnv, ModDetails)
tm_internals DesugaredModule
m      = TypecheckedModule -> (TcGblEnv, ModDetails)
tm_internals_ (DesugaredModule -> TypecheckedModule
dm_typechecked_module DesugaredModule
m)

instance DesugaredMod DesugaredModule where
  coreModule :: DesugaredModule -> ModGuts
coreModule DesugaredModule
m = DesugaredModule -> ModGuts
dm_core_module DesugaredModule
m

type ParsedSource      = Located (HsModule GhcPs)
type RenamedSource     = (HsGroup GhcRn, [LImportDecl GhcRn], Maybe [(LIE GhcRn, Avails)],
                          Maybe (LHsDoc GhcRn), Maybe (XRec GhcRn ModuleName))
type TypecheckedSource = LHsBinds GhcTc

-- NOTE:
--   - things that aren't in the output of the typechecker right now:
--     - the export list
--     - the imports
--     - type signatures
--     - type/data/newtype declarations
--     - class declarations
--     - instances
--   - extra things in the typechecker's output:
--     - default methods are turned into top-level decls.
--     - dictionary bindings

-- | Return the 'ModSummary' of a module with the given name.
--
-- The module must be part of the module graph (see 'hsc_mod_graph' and
-- 'ModuleGraph').  If this is not the case, this function will throw a
-- 'GhcApiError'.
--
-- This function ignores boot modules and requires that there is only one
-- non-boot module with the given name.
getModSummary :: GhcMonad m => ModuleName -> m ModSummary
getModSummary :: forall (m :: * -> *). GhcMonad m => ModuleName -> m ModSummary
getModSummary ModuleName
mod = do
   mg <- (HscEnv -> ModuleGraph) -> m HscEnv -> m ModuleGraph
forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM HscEnv -> ModuleGraph
hsc_mod_graph m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession
   let mods_by_name = [ ModSummary
ms | ModSummary
ms <- ModuleGraph -> [ModSummary]
mgModSummaries ModuleGraph
mg
                      , ModSummary -> ModuleName
ms_mod_name ModSummary
ms ModuleName -> ModuleName -> Bool
forall a. Eq a => a -> a -> Bool
== ModuleName
mod
                      , ModSummary -> IsBootInterface
isBootSummary ModSummary
ms IsBootInterface -> IsBootInterface -> Bool
forall a. Eq a => a -> a -> Bool
== IsBootInterface
NotBoot ]
   case mods_by_name of
     [] -> do dflags <- m DynFlags
forall (m :: * -> *). HasDynFlags m => m DynFlags
getDynFlags
              liftIO $ throwIO $ mkApiErr dflags (text "Module not part of module graph")
     [ModSummary
ms] -> ModSummary -> m ModSummary
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return ModSummary
ms
     [ModSummary]
multiple -> do dflags <- m DynFlags
forall (m :: * -> *). HasDynFlags m => m DynFlags
getDynFlags
                    liftIO $ throwIO $ mkApiErr dflags (text "getModSummary is ambiguous: " <+> ppr multiple)

-- | Parse a module.
--
-- Throws a 'SourceError' on parse error.
parseModule :: GhcMonad m => ModSummary -> m ParsedModule
parseModule :: forall (m :: * -> *). GhcMonad m => ModSummary -> m ParsedModule
parseModule ModSummary
ms = do
   hsc_env <- m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession
   liftIO $ do
     let lcl_hsc_env = HasDebugCallStack => DynFlags -> HscEnv -> HscEnv
DynFlags -> HscEnv -> HscEnv
hscSetFlags (ModSummary -> DynFlags
ms_hspp_opts ModSummary
ms) HscEnv
hsc_env
     hpm <- hscParse lcl_hsc_env ms
     return (ParsedModule ms (hpm_module hpm) (hpm_src_files hpm))
               -- See Note [exact print annotations] in GHC.Parser.Annotation

-- | Typecheck and rename a parsed module.
--
-- Throws a 'SourceError' if either fails.
typecheckModule :: GhcMonad m => ParsedModule -> m TypecheckedModule
typecheckModule :: forall (m :: * -> *).
GhcMonad m =>
ParsedModule -> m TypecheckedModule
typecheckModule ParsedModule
pmod = do
 hsc_env <- m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession

 liftIO $ do
   let ms          = ParsedModule -> ModSummary
forall m. ParsedMod m => m -> ModSummary
modSummary ParsedModule
pmod
   let lcl_dflags  = ModSummary -> DynFlags
ms_hspp_opts ModSummary
ms -- take into account pragmas (OPTIONS_GHC, etc.)
   let lcl_hsc_env = HasDebugCallStack => DynFlags -> HscEnv -> HscEnv
DynFlags -> HscEnv -> HscEnv
hscSetFlags DynFlags
lcl_dflags HscEnv
hsc_env
   let lcl_logger  = HscEnv -> Logger
hsc_logger HscEnv
lcl_hsc_env
   (tc_gbl_env, rn_info) <- hscTypecheckRename lcl_hsc_env ms $
                        HsParsedModule { hpm_module = parsedSource pmod,
                                         hpm_src_files = pm_extra_src_files pmod }
   details <- makeSimpleDetails lcl_logger tc_gbl_env
   safe    <- finalSafeMode lcl_dflags tc_gbl_env

   return $
     TypecheckedModule {
       tm_internals_          = (tc_gbl_env, details),
       tm_parsed_module       = pmod,
       tm_renamed_source      = rn_info,
       tm_typechecked_source  = tcg_binds tc_gbl_env,
       tm_checked_module_info =
         ModuleInfo {
           minf_type_env  = md_types details,
           minf_exports   = md_exports details,
           minf_instances = fixSafeInstances safe $ instEnvElts $ md_insts details,
           minf_iface     = Nothing,
           minf_safe      = safe,
           minf_modBreaks = emptyModBreaks
         }}

-- | Desugar a typechecked module.
desugarModule :: GhcMonad m => TypecheckedModule -> m DesugaredModule
desugarModule :: forall (m :: * -> *).
GhcMonad m =>
TypecheckedModule -> m DesugaredModule
desugarModule TypecheckedModule
tcm = do
 hsc_env <- m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession
 liftIO $ do
   let ms = TypecheckedModule -> ModSummary
forall m. ParsedMod m => m -> ModSummary
modSummary TypecheckedModule
tcm
   let (tcg, _) = tm_internals tcm
   let lcl_hsc_env = HasDebugCallStack => DynFlags -> HscEnv -> HscEnv
DynFlags -> HscEnv -> HscEnv
hscSetFlags (ModSummary -> DynFlags
ms_hspp_opts ModSummary
ms) HscEnv
hsc_env
   guts <- hscDesugar lcl_hsc_env ms tcg
   return $
     DesugaredModule {
       dm_typechecked_module = tcm,
       dm_core_module        = guts
     }



-- %************************************************************************
-- %*                                                                      *
--             Dealing with Core
-- %*                                                                      *
-- %************************************************************************

-- | A CoreModule consists of just the fields of a 'ModGuts' that are needed for
-- the 'GHC.compileToCoreModule' interface.
data CoreModule
  = CoreModule {
      -- | Module name
      CoreModule -> Module
cm_module   :: !Module,
      -- | Type environment for types declared in this module
      CoreModule -> TypeEnv
cm_types    :: !TypeEnv,
      -- | Declarations
      CoreModule -> CoreProgram
cm_binds    :: CoreProgram,
      -- | Safe Haskell mode
      CoreModule -> SafeHaskellMode
cm_safe     :: SafeHaskellMode
    }

instance Outputable CoreModule where
   ppr :: CoreModule -> SDoc
ppr (CoreModule {cm_module :: CoreModule -> Module
cm_module = Module
mn, cm_types :: CoreModule -> TypeEnv
cm_types = TypeEnv
te, cm_binds :: CoreModule -> CoreProgram
cm_binds = CoreProgram
cb,
                    cm_safe :: CoreModule -> SafeHaskellMode
cm_safe = SafeHaskellMode
sf})
    = FilePath -> SDoc
forall doc. IsLine doc => FilePath -> doc
text FilePath
"%module" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> Module -> SDoc
forall a. Outputable a => a -> SDoc
ppr Module
mn SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens (SafeHaskellMode -> SDoc
forall a. Outputable a => a -> SDoc
ppr SafeHaskellMode
sf) SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> TypeEnv -> SDoc
forall a. Outputable a => a -> SDoc
ppr TypeEnv
te
      SDoc -> SDoc -> SDoc
forall doc. IsDoc doc => doc -> doc -> doc
$$ [SDoc] -> SDoc
forall doc. IsDoc doc => [doc] -> doc
vcat ((CoreBind -> SDoc) -> CoreProgram -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map CoreBind -> SDoc
forall a. Outputable a => a -> SDoc
ppr CoreProgram
cb)

-- | This is the way to get access to the Core bindings corresponding
-- to a module. 'compileToCore' parses, typechecks, and
-- desugars the module, then returns the resulting Core module (consisting of
-- the module name, type declarations, and function declarations) if
-- successful.
compileToCoreModule :: GhcMonad m => FilePath -> m CoreModule
compileToCoreModule :: forall (m :: * -> *). GhcMonad m => FilePath -> m CoreModule
compileToCoreModule = Bool -> FilePath -> m CoreModule
forall (m :: * -> *).
GhcMonad m =>
Bool -> FilePath -> m CoreModule
compileCore Bool
False

-- | Like compileToCoreModule, but invokes the simplifier, so
-- as to return simplified and tidied Core.
compileToCoreSimplified :: GhcMonad m => FilePath -> m CoreModule
compileToCoreSimplified :: forall (m :: * -> *). GhcMonad m => FilePath -> m CoreModule
compileToCoreSimplified = Bool -> FilePath -> m CoreModule
forall (m :: * -> *).
GhcMonad m =>
Bool -> FilePath -> m CoreModule
compileCore Bool
True

compileCore :: GhcMonad m => Bool -> FilePath -> m CoreModule
compileCore :: forall (m :: * -> *).
GhcMonad m =>
Bool -> FilePath -> m CoreModule
compileCore Bool
simplify FilePath
fn = do
   -- First, set the target to the desired filename
   target <- FilePath -> Maybe UnitId -> Maybe Phase -> m Target
forall (m :: * -> *).
GhcMonad m =>
FilePath -> Maybe UnitId -> Maybe Phase -> m Target
guessTarget FilePath
fn Maybe UnitId
forall a. Maybe a
Nothing Maybe Phase
forall a. Maybe a
Nothing
   addTarget target
   _ <- load LoadAllTargets
   -- Then find dependencies
   modGraph <- depanal [] True
   case find ((== fn) . msHsFilePath) (mgModSummaries modGraph) of
     Just ModSummary
modSummary -> do
       -- Now we have the module name;
       -- parse, typecheck and desugar the module
       (tcg, mod_guts) <- -- TODO: space leaky: call hsc* directly?
         do tm <- ParsedModule -> m TypecheckedModule
forall (m :: * -> *).
GhcMonad m =>
ParsedModule -> m TypecheckedModule
typecheckModule (ParsedModule -> m TypecheckedModule)
-> m ParsedModule -> m TypecheckedModule
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< ModSummary -> m ParsedModule
forall (m :: * -> *). GhcMonad m => ModSummary -> m ParsedModule
parseModule ModSummary
modSummary
            let tcg = (TcGblEnv, ModDetails) -> TcGblEnv
forall a b. (a, b) -> a
fst (TypecheckedModule -> (TcGblEnv, ModDetails)
forall m. TypecheckedMod m => m -> (TcGblEnv, ModDetails)
tm_internals TypecheckedModule
tm)
            (,) tcg . coreModule <$> desugarModule tm
       liftM (gutsToCoreModule (mg_safe_haskell mod_guts)) $
         if simplify
          then do
             -- If simplify is true: simplify (hscSimplify), then tidy
             -- (hscTidy).
             hsc_env <- getSession
             simpl_guts <- liftIO $ do
               plugins <- readIORef (tcg_th_coreplugins tcg)
               hscSimplify hsc_env plugins mod_guts
             tidy_guts <- liftIO $ hscTidy hsc_env simpl_guts
             return $ Left tidy_guts
          else
             return $ Right mod_guts

     Maybe ModSummary
Nothing -> FilePath -> m CoreModule
forall a. HasCallStack => FilePath -> a
panic FilePath
"compileToCoreModule: target FilePath not found in module dependency graph"
  where -- two versions, based on whether we simplify (thus run tidyProgram,
        -- which returns a (CgGuts, ModDetails) pair, or not (in which case
        -- we just have a ModGuts.
        gutsToCoreModule :: SafeHaskellMode
                         -> Either (CgGuts, ModDetails) ModGuts
                         -> CoreModule
        gutsToCoreModule :: SafeHaskellMode
-> Either (CgGuts, ModDetails) ModGuts -> CoreModule
gutsToCoreModule SafeHaskellMode
safe_mode (Left (CgGuts
cg, ModDetails
md)) = CoreModule {
          cm_module :: Module
cm_module = CgGuts -> Module
cg_module CgGuts
cg,
          cm_types :: TypeEnv
cm_types  = ModDetails -> TypeEnv
md_types ModDetails
md,
          cm_binds :: CoreProgram
cm_binds  = CgGuts -> CoreProgram
cg_binds CgGuts
cg,
          cm_safe :: SafeHaskellMode
cm_safe   = SafeHaskellMode
safe_mode
        }
        gutsToCoreModule SafeHaskellMode
safe_mode (Right ModGuts
mg) = CoreModule {
          cm_module :: Module
cm_module  = ModGuts -> Module
mg_module ModGuts
mg,
          cm_types :: TypeEnv
cm_types   = [Var] -> [TyCon] -> [PatSyn] -> [FamInst] -> TypeEnv
typeEnvFromEntities (CoreProgram -> [Var]
forall b. [Bind b] -> [b]
bindersOfBinds (ModGuts -> CoreProgram
mg_binds ModGuts
mg))
                                           (ModGuts -> [TyCon]
mg_tcs ModGuts
mg) (ModGuts -> [PatSyn]
mg_patsyns ModGuts
mg)
                                           (ModGuts -> [FamInst]
mg_fam_insts ModGuts
mg),
          cm_binds :: CoreProgram
cm_binds   = ModGuts -> CoreProgram
mg_binds ModGuts
mg,
          cm_safe :: SafeHaskellMode
cm_safe    = SafeHaskellMode
safe_mode
         }

-- %************************************************************************
-- %*                                                                      *
--             Inspecting the session
-- %*                                                                      *
-- %************************************************************************

-- | Get the module dependency graph.
getModuleGraph :: GhcMonad m => m ModuleGraph -- ToDo: DiGraph ModSummary
getModuleGraph :: forall (m :: * -> *). GhcMonad m => m ModuleGraph
getModuleGraph = (HscEnv -> ModuleGraph) -> m HscEnv -> m ModuleGraph
forall (m :: * -> *) a1 r. Monad m => (a1 -> r) -> m a1 -> m r
liftM HscEnv -> ModuleGraph
hsc_mod_graph m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession

-- | Return @True@ \<==> module is loaded.
isLoaded :: GhcMonad m => ModuleName -> m Bool
isLoaded :: forall (m :: * -> *). GhcMonad m => ModuleName -> m Bool
isLoaded ModuleName
m = (HscEnv -> m Bool) -> m Bool
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m Bool) -> m Bool) -> (HscEnv -> m Bool) -> m Bool
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
  Bool -> m Bool
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (Bool -> m Bool) -> Bool -> m Bool
forall a b. (a -> b) -> a -> b
$! Maybe HomeModInfo -> Bool
forall a. Maybe a -> Bool
isJust (HomePackageTable -> ModuleName -> Maybe HomeModInfo
lookupHpt (HscEnv -> HomePackageTable
hsc_HPT HscEnv
hsc_env) ModuleName
m)

isLoadedModule :: GhcMonad m => UnitId -> ModuleName -> m Bool
isLoadedModule :: forall (m :: * -> *). GhcMonad m => UnitId -> ModuleName -> m Bool
isLoadedModule UnitId
uid ModuleName
m = (HscEnv -> m Bool) -> m Bool
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m Bool) -> m Bool) -> (HscEnv -> m Bool) -> m Bool
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
  Bool -> m Bool
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (Bool -> m Bool) -> Bool -> m Bool
forall a b. (a -> b) -> a -> b
$! Maybe HomeModInfo -> Bool
forall a. Maybe a -> Bool
isJust (UnitEnvGraph HomeUnitEnv
-> UnitId -> ModuleName -> Maybe HomeModInfo
lookupHug (HscEnv -> UnitEnvGraph HomeUnitEnv
hsc_HUG HscEnv
hsc_env) UnitId
uid ModuleName
m)

-- | Return the bindings for the current interactive session.
getBindings :: GhcMonad m => m [TyThing]
getBindings :: forall (m :: * -> *). GhcMonad m => m [TyThing]
getBindings = (HscEnv -> m [TyThing]) -> m [TyThing]
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m [TyThing]) -> m [TyThing])
-> (HscEnv -> m [TyThing]) -> m [TyThing]
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
    [TyThing] -> m [TyThing]
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return ([TyThing] -> m [TyThing]) -> [TyThing] -> m [TyThing]
forall a b. (a -> b) -> a -> b
$ InteractiveContext -> [TyThing]
icInScopeTTs (InteractiveContext -> [TyThing])
-> InteractiveContext -> [TyThing]
forall a b. (a -> b) -> a -> b
$ HscEnv -> InteractiveContext
hsc_IC HscEnv
hsc_env

-- | Return the instances for the current interactive session.
getInsts :: GhcMonad m => m ([ClsInst], [FamInst])
getInsts :: forall (m :: * -> *). GhcMonad m => m ([ClsInst], [FamInst])
getInsts = (HscEnv -> m ([ClsInst], [FamInst])) -> m ([ClsInst], [FamInst])
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m ([ClsInst], [FamInst])) -> m ([ClsInst], [FamInst]))
-> (HscEnv -> m ([ClsInst], [FamInst])) -> m ([ClsInst], [FamInst])
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
    let (InstEnv
inst_env, [FamInst]
fam_env) = InteractiveContext -> (InstEnv, [FamInst])
ic_instances (HscEnv -> InteractiveContext
hsc_IC HscEnv
hsc_env)
    in ([ClsInst], [FamInst]) -> m ([ClsInst], [FamInst])
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (InstEnv -> [ClsInst]
instEnvElts InstEnv
inst_env, [FamInst]
fam_env)

getNamePprCtx :: GhcMonad m => m NamePprCtx
getNamePprCtx :: forall (m :: * -> *). GhcMonad m => m NamePprCtx
getNamePprCtx = (HscEnv -> m NamePprCtx) -> m NamePprCtx
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m NamePprCtx) -> m NamePprCtx)
-> (HscEnv -> m NamePprCtx) -> m NamePprCtx
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
  NamePprCtx -> m NamePprCtx
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (NamePprCtx -> m NamePprCtx) -> NamePprCtx -> m NamePprCtx
forall a b. (a -> b) -> a -> b
$ UnitEnv -> InteractiveContext -> NamePprCtx
icNamePprCtx (HscEnv -> UnitEnv
hsc_unit_env HscEnv
hsc_env) (HscEnv -> InteractiveContext
hsc_IC HscEnv
hsc_env)

-- | Container for information about a 'Module'.
data ModuleInfo = ModuleInfo {
        ModuleInfo -> TypeEnv
minf_type_env  :: TypeEnv,
        ModuleInfo -> [AvailInfo]
minf_exports   :: [AvailInfo],
        ModuleInfo -> [ClsInst]
minf_instances :: [ClsInst],
        ModuleInfo -> Maybe ModIface
minf_iface     :: Maybe ModIface,
        ModuleInfo -> SafeHaskellMode
minf_safe      :: SafeHaskellMode,
        ModuleInfo -> ModBreaks
minf_modBreaks :: ModBreaks
  }
        -- We don't want HomeModInfo here, because a ModuleInfo applies
        -- to package modules too.


-- | Request information about a loaded 'Module'
getModuleInfo :: GhcMonad m => Module -> m (Maybe ModuleInfo)  -- XXX: Maybe X
getModuleInfo :: forall (m :: * -> *). GhcMonad m => Module -> m (Maybe ModuleInfo)
getModuleInfo Module
mdl = (HscEnv -> m (Maybe ModuleInfo)) -> m (Maybe ModuleInfo)
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m (Maybe ModuleInfo)) -> m (Maybe ModuleInfo))
-> (HscEnv -> m (Maybe ModuleInfo)) -> m (Maybe ModuleInfo)
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
  if Module -> UnitId
moduleUnitId Module
mdl UnitId -> Set UnitId -> Bool
forall a. Ord a => a -> Set a -> Bool
`S.member` HscEnv -> Set UnitId
hsc_all_home_unit_ids HscEnv
hsc_env
        then IO (Maybe ModuleInfo) -> m (Maybe ModuleInfo)
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (Maybe ModuleInfo) -> m (Maybe ModuleInfo))
-> IO (Maybe ModuleInfo) -> m (Maybe ModuleInfo)
forall a b. (a -> b) -> a -> b
$ HscEnv -> Module -> IO (Maybe ModuleInfo)
getHomeModuleInfo HscEnv
hsc_env Module
mdl
        else IO (Maybe ModuleInfo) -> m (Maybe ModuleInfo)
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (Maybe ModuleInfo) -> m (Maybe ModuleInfo))
-> IO (Maybe ModuleInfo) -> m (Maybe ModuleInfo)
forall a b. (a -> b) -> a -> b
$ HscEnv -> Module -> IO (Maybe ModuleInfo)
getPackageModuleInfo HscEnv
hsc_env Module
mdl

getPackageModuleInfo :: HscEnv -> Module -> IO (Maybe ModuleInfo)
getPackageModuleInfo :: HscEnv -> Module -> IO (Maybe ModuleInfo)
getPackageModuleInfo HscEnv
hsc_env Module
mdl
  = do  eps <- HscEnv -> IO ExternalPackageState
hscEPS HscEnv
hsc_env
        iface <- hscGetModuleInterface hsc_env mdl
        let
            avails = ModIface -> [AvailInfo]
forall (phase :: ModIfacePhase). ModIface_ phase -> [AvailInfo]
mi_exports ModIface
iface
            pte    = ExternalPackageState -> TypeEnv
eps_PTE ExternalPackageState
eps
            tys    = [ TyThing
ty | Name
name <- (AvailInfo -> [Name]) -> [AvailInfo] -> [Name]
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap AvailInfo -> [Name]
availNames [AvailInfo]
avails,
                            Just TyThing
ty <- [TypeEnv -> Name -> Maybe TyThing
lookupTypeEnv TypeEnv
pte Name
name] ]

        return (Just (ModuleInfo {
                        minf_type_env  = mkTypeEnv tys,
                        minf_exports   = avails,
                        minf_instances = error "getModuleInfo: instances for package module unimplemented",
                        minf_iface     = Just iface,
                        minf_safe      = getSafeMode $ mi_trust iface,
                        minf_modBreaks = emptyModBreaks
                }))

availsToGlobalRdrEnv :: HasDebugCallStack => HscEnv -> Module -> [AvailInfo] -> IfGlobalRdrEnv
availsToGlobalRdrEnv :: HasDebugCallStack =>
HscEnv -> Module -> [AvailInfo] -> IfGlobalRdrEnv
availsToGlobalRdrEnv HscEnv
hsc_env Module
mod [AvailInfo]
avails
  = GlobalRdrEnvX GREInfo -> IfGlobalRdrEnv
forall info. GlobalRdrEnvX info -> IfGlobalRdrEnv
forceGlobalRdrEnv GlobalRdrEnvX GREInfo
rdr_env
    -- See Note [Forcing GREInfo] in GHC.Types.GREInfo.
  where
    rdr_env :: GlobalRdrEnvX GREInfo
rdr_env = [GlobalRdrElt] -> GlobalRdrEnvX GREInfo
mkGlobalRdrEnv (HscEnv -> Maybe ImportSpec -> [AvailInfo] -> [GlobalRdrElt]
gresFromAvails HscEnv
hsc_env (ImportSpec -> Maybe ImportSpec
forall a. a -> Maybe a
Just ImportSpec
imp_spec) [AvailInfo]
avails)
      -- We're building a GlobalRdrEnv as if the user imported
      -- all the specified modules into the global interactive module
    imp_spec :: ImportSpec
imp_spec = ImpSpec { is_decl :: ImpDeclSpec
is_decl = ImpDeclSpec
decl, is_item :: ImpItemSpec
is_item = ImpItemSpec
ImpAll}
    decl :: ImpDeclSpec
decl = ImpDeclSpec { is_mod :: Module
is_mod = Module
mod, is_as :: ModuleName
is_as = Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
mod,
                         is_qual :: Bool
is_qual = Bool
False, is_isboot :: IsBootInterface
is_isboot = IsBootInterface
NotBoot, is_pkg_qual :: PkgQual
is_pkg_qual = PkgQual
NoPkgQual,
                         is_dloc :: SrcSpan
is_dloc = SrcLoc -> SrcSpan
srcLocSpan SrcLoc
interactiveSrcLoc }

getHomeModuleInfo :: HscEnv -> Module -> IO (Maybe ModuleInfo)
getHomeModuleInfo :: HscEnv -> Module -> IO (Maybe ModuleInfo)
getHomeModuleInfo HscEnv
hsc_env Module
mdl =
  case Module -> UnitEnvGraph HomeUnitEnv -> Maybe HomeModInfo
lookupHugByModule Module
mdl (HscEnv -> UnitEnvGraph HomeUnitEnv
hsc_HUG HscEnv
hsc_env) of
    Maybe HomeModInfo
Nothing  -> Maybe ModuleInfo -> IO (Maybe ModuleInfo)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe ModuleInfo
forall a. Maybe a
Nothing
    Just HomeModInfo
hmi -> do
      let details :: ModDetails
details  = HomeModInfo -> ModDetails
hm_details HomeModInfo
hmi
          iface :: ModIface
iface    = HomeModInfo -> ModIface
hm_iface HomeModInfo
hmi
      Maybe ModuleInfo -> IO (Maybe ModuleInfo)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (ModuleInfo -> Maybe ModuleInfo
forall a. a -> Maybe a
Just (ModuleInfo {
                        minf_type_env :: TypeEnv
minf_type_env  = ModDetails -> TypeEnv
md_types ModDetails
details,
                        minf_exports :: [AvailInfo]
minf_exports   = ModDetails -> [AvailInfo]
md_exports ModDetails
details,
                         -- NB: already forced. See Note [Forcing GREInfo] in GHC.Types.GREInfo.
                        minf_instances :: [ClsInst]
minf_instances = InstEnv -> [ClsInst]
instEnvElts (InstEnv -> [ClsInst]) -> InstEnv -> [ClsInst]
forall a b. (a -> b) -> a -> b
$ ModDetails -> InstEnv
md_insts ModDetails
details,
                        minf_iface :: Maybe ModIface
minf_iface     = ModIface -> Maybe ModIface
forall a. a -> Maybe a
Just ModIface
iface,
                        minf_safe :: SafeHaskellMode
minf_safe      = IfaceTrustInfo -> SafeHaskellMode
getSafeMode (IfaceTrustInfo -> SafeHaskellMode)
-> IfaceTrustInfo -> SafeHaskellMode
forall a b. (a -> b) -> a -> b
$ ModIface -> IfaceTrustInfo
forall (phase :: ModIfacePhase). ModIface_ phase -> IfaceTrustInfo
mi_trust ModIface
iface
                       ,minf_modBreaks :: ModBreaks
minf_modBreaks = HomeModInfo -> ModBreaks
getModBreaks HomeModInfo
hmi
                        }))

-- | The list of top-level entities defined in a module
modInfoTyThings :: ModuleInfo -> [TyThing]
modInfoTyThings :: ModuleInfo -> [TyThing]
modInfoTyThings ModuleInfo
minf = TypeEnv -> [TyThing]
typeEnvElts (ModuleInfo -> TypeEnv
minf_type_env ModuleInfo
minf)

modInfoExports :: ModuleInfo -> [Name]
modInfoExports :: ModuleInfo -> [Name]
modInfoExports ModuleInfo
minf = (AvailInfo -> [Name]) -> [AvailInfo] -> [Name]
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap AvailInfo -> [Name]
availNames ([AvailInfo] -> [Name]) -> [AvailInfo] -> [Name]
forall a b. (a -> b) -> a -> b
$! ModuleInfo -> [AvailInfo]
minf_exports ModuleInfo
minf

modInfoExportsWithSelectors :: ModuleInfo -> [Name]
modInfoExportsWithSelectors :: ModuleInfo -> [Name]
modInfoExportsWithSelectors ModuleInfo
minf = (AvailInfo -> [Name]) -> [AvailInfo] -> [Name]
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap AvailInfo -> [Name]
availNames ([AvailInfo] -> [Name]) -> [AvailInfo] -> [Name]
forall a b. (a -> b) -> a -> b
$! ModuleInfo -> [AvailInfo]
minf_exports ModuleInfo
minf

-- | Returns the instances defined by the specified module.
-- Warning: currently unimplemented for package modules.
modInfoInstances :: ModuleInfo -> [ClsInst]
modInfoInstances :: ModuleInfo -> [ClsInst]
modInfoInstances = ModuleInfo -> [ClsInst]
minf_instances

modInfoIsExportedName :: ModuleInfo -> Name -> Bool
modInfoIsExportedName :: ModuleInfo -> Name -> Bool
modInfoIsExportedName ModuleInfo
minf Name
name = Name -> NameSet -> Bool
elemNameSet Name
name ([AvailInfo] -> NameSet
availsToNameSet (ModuleInfo -> [AvailInfo]
minf_exports ModuleInfo
minf))

mkNamePprCtxForModule ::
  GhcMonad m =>
  Module     ->
  ModuleInfo ->
  m NamePprCtx
mkNamePprCtxForModule :: forall (m :: * -> *).
GhcMonad m =>
Module -> ModuleInfo -> m NamePprCtx
mkNamePprCtxForModule Module
mod ModuleInfo
minf = (HscEnv -> m NamePprCtx) -> m NamePprCtx
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m NamePprCtx) -> m NamePprCtx)
-> (HscEnv -> m NamePprCtx) -> m NamePprCtx
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
  let name_ppr_ctx :: NamePprCtx
name_ppr_ctx = PromotionTickContext -> UnitEnv -> IfGlobalRdrEnv -> NamePprCtx
forall info.
Outputable info =>
PromotionTickContext -> UnitEnv -> GlobalRdrEnvX info -> NamePprCtx
mkNamePprCtx PromotionTickContext
ptc (HscEnv -> UnitEnv
hsc_unit_env HscEnv
hsc_env) (HasDebugCallStack =>
HscEnv -> Module -> [AvailInfo] -> IfGlobalRdrEnv
HscEnv -> Module -> [AvailInfo] -> IfGlobalRdrEnv
availsToGlobalRdrEnv HscEnv
hsc_env Module
mod (ModuleInfo -> [AvailInfo]
minf_exports ModuleInfo
minf))
      ptc :: PromotionTickContext
ptc = DynFlags -> PromotionTickContext
initPromotionTickContext (HscEnv -> DynFlags
hsc_dflags HscEnv
hsc_env)
  NamePprCtx -> m NamePprCtx
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return NamePprCtx
name_ppr_ctx

modInfoLookupName :: GhcMonad m =>
                     ModuleInfo -> Name
                  -> m (Maybe TyThing) -- XXX: returns a Maybe X
modInfoLookupName :: forall (m :: * -> *).
GhcMonad m =>
ModuleInfo -> Name -> m (Maybe TyThing)
modInfoLookupName ModuleInfo
minf Name
name = (HscEnv -> m (Maybe TyThing)) -> m (Maybe TyThing)
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m (Maybe TyThing)) -> m (Maybe TyThing))
-> (HscEnv -> m (Maybe TyThing)) -> m (Maybe TyThing)
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
   case TypeEnv -> Name -> Maybe TyThing
lookupTypeEnv (ModuleInfo -> TypeEnv
minf_type_env ModuleInfo
minf) Name
name of
     Just TyThing
tyThing -> Maybe TyThing -> m (Maybe TyThing)
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (TyThing -> Maybe TyThing
forall a. a -> Maybe a
Just TyThing
tyThing)
     Maybe TyThing
Nothing      -> IO (Maybe TyThing) -> m (Maybe TyThing)
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (HscEnv -> Name -> IO (Maybe TyThing)
lookupType HscEnv
hsc_env Name
name)

modInfoIface :: ModuleInfo -> Maybe ModIface
modInfoIface :: ModuleInfo -> Maybe ModIface
modInfoIface = ModuleInfo -> Maybe ModIface
minf_iface

-- | Retrieve module safe haskell mode
modInfoSafe :: ModuleInfo -> SafeHaskellMode
modInfoSafe :: ModuleInfo -> SafeHaskellMode
modInfoSafe = ModuleInfo -> SafeHaskellMode
minf_safe

modInfoModBreaks :: ModuleInfo -> ModBreaks
modInfoModBreaks :: ModuleInfo -> ModBreaks
modInfoModBreaks = ModuleInfo -> ModBreaks
minf_modBreaks

isDictonaryId :: Id -> Bool
isDictonaryId :: Var -> Bool
isDictonaryId Var
id = Type -> Bool
isDictTy (Var -> Type
idType Var
id)

-- | Looks up a global name: that is, any top-level name in any
-- visible module.  Unlike 'lookupName', lookupGlobalName does not use
-- the interactive context, and therefore does not require a preceding
-- 'setContext'.
lookupGlobalName :: GhcMonad m => Name -> m (Maybe TyThing)
lookupGlobalName :: forall (m :: * -> *). GhcMonad m => Name -> m (Maybe TyThing)
lookupGlobalName Name
name = (HscEnv -> m (Maybe TyThing)) -> m (Maybe TyThing)
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m (Maybe TyThing)) -> m (Maybe TyThing))
-> (HscEnv -> m (Maybe TyThing)) -> m (Maybe TyThing)
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
   IO (Maybe TyThing) -> m (Maybe TyThing)
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (Maybe TyThing) -> m (Maybe TyThing))
-> IO (Maybe TyThing) -> m (Maybe TyThing)
forall a b. (a -> b) -> a -> b
$ HscEnv -> Name -> IO (Maybe TyThing)
lookupType HscEnv
hsc_env Name
name

findGlobalAnns :: (GhcMonad m, Typeable a) => ([Word8] -> a) -> AnnTarget Name -> m [a]
findGlobalAnns :: forall (m :: * -> *) a.
(GhcMonad m, Typeable a) =>
([Word8] -> a) -> AnnTarget Name -> m [a]
findGlobalAnns [Word8] -> a
deserialize AnnTarget Name
target = (HscEnv -> m [a]) -> m [a]
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m [a]) -> m [a]) -> (HscEnv -> m [a]) -> m [a]
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
    ann_env <- IO AnnEnv -> m AnnEnv
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO AnnEnv -> m AnnEnv) -> IO AnnEnv -> m AnnEnv
forall a b. (a -> b) -> a -> b
$ HscEnv -> Maybe ModGuts -> IO AnnEnv
prepareAnnotations HscEnv
hsc_env Maybe ModGuts
forall a. Maybe a
Nothing
    return (findAnns deserialize ann_env target)

-- | get the GlobalRdrEnv for a session
getGRE :: GhcMonad m => m GlobalRdrEnv
getGRE :: forall (m :: * -> *). GhcMonad m => m (GlobalRdrEnvX GREInfo)
getGRE = (HscEnv -> m (GlobalRdrEnvX GREInfo)) -> m (GlobalRdrEnvX GREInfo)
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m (GlobalRdrEnvX GREInfo))
 -> m (GlobalRdrEnvX GREInfo))
-> (HscEnv -> m (GlobalRdrEnvX GREInfo))
-> m (GlobalRdrEnvX GREInfo)
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env-> GlobalRdrEnvX GREInfo -> m (GlobalRdrEnvX GREInfo)
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (GlobalRdrEnvX GREInfo -> m (GlobalRdrEnvX GREInfo))
-> GlobalRdrEnvX GREInfo -> m (GlobalRdrEnvX GREInfo)
forall a b. (a -> b) -> a -> b
$ InteractiveContext -> GlobalRdrEnvX GREInfo
icReaderEnv (HscEnv -> InteractiveContext
hsc_IC HscEnv
hsc_env)

-- | Retrieve all type and family instances in the environment, indexed
-- by 'Name'. Each name's lists will contain every instance in which that name
-- is mentioned in the instance head.
getNameToInstancesIndex :: GhcMonad m
  => [Module]        -- ^ visible modules. An orphan instance will be returned
                     -- if it is visible from at least one module in the list.
  -> Maybe [Module]  -- ^ modules to load. If this is not specified, we load
                     -- modules for everything that is in scope unqualified.
  -> m (Messages TcRnMessage, Maybe (NameEnv ([ClsInst], [FamInst])))
getNameToInstancesIndex :: forall (m :: * -> *).
GhcMonad m =>
[Module]
-> Maybe [Module]
-> m (Messages TcRnMessage, Maybe (NameEnv ([ClsInst], [FamInst])))
getNameToInstancesIndex [Module]
visible_mods Maybe [Module]
mods_to_load = do
  hsc_env <- m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession
  liftIO $ runTcInteractive hsc_env $
    do { case mods_to_load of
           Maybe [Module]
Nothing -> HscEnv -> InteractiveContext -> IOEnv (Env TcGblEnv TcLclEnv) ()
loadUnqualIfaces HscEnv
hsc_env (HscEnv -> InteractiveContext
hsc_IC HscEnv
hsc_env)
           Just [Module]
mods ->
             let doc :: SDoc
doc = FilePath -> SDoc
forall doc. IsLine doc => FilePath -> doc
text FilePath
"Need interface for reporting instances in scope"
             in IfG () -> IOEnv (Env TcGblEnv TcLclEnv) ()
forall a. IfG a -> TcRn a
initIfaceTcRn (IfG () -> IOEnv (Env TcGblEnv TcLclEnv) ())
-> IfG () -> IOEnv (Env TcGblEnv TcLclEnv) ()
forall a b. (a -> b) -> a -> b
$ (Module -> IOEnv (Env IfGblEnv ()) ModIface) -> [Module] -> IfG ()
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
(a -> m b) -> t a -> m ()
mapM_ (SDoc -> Module -> IOEnv (Env IfGblEnv ()) ModIface
forall lcl. SDoc -> Module -> IfM lcl ModIface
loadSysInterface SDoc
doc) [Module]
mods

       ; InstEnvs {ie_global, ie_local} <- tcGetInstEnvs
       ; let visible_mods' = [Module] -> ModuleSet
mkModuleSet [Module]
visible_mods
       ; (pkg_fie, home_fie) <- tcGetFamInstEnvs
       -- We use Data.Sequence.Seq because we are creating left associated
       -- mappends.
       -- cls_index and fam_index below are adapted from GHC.Tc.Module.lookupInsts
       ; let cls_index = (Seq ClsInst -> Seq ClsInst -> Seq ClsInst)
-> [(Name, Seq ClsInst)] -> Map Name (Seq ClsInst)
forall k a. Ord k => (a -> a -> a) -> [(k, a)] -> Map k a
Map.fromListWith Seq ClsInst -> Seq ClsInst -> Seq ClsInst
forall a. Monoid a => a -> a -> a
mappend
                 [ (Name
n, ClsInst -> Seq ClsInst
forall a. a -> Seq a
Seq.singleton ClsInst
ispec)
                 | ClsInst
ispec <- InstEnv -> [ClsInst]
instEnvElts InstEnv
ie_local [ClsInst] -> [ClsInst] -> [ClsInst]
forall a. [a] -> [a] -> [a]
++ InstEnv -> [ClsInst]
instEnvElts InstEnv
ie_global
                 , ModuleSet -> ClsInst -> Bool
instIsVisible ModuleSet
visible_mods' ClsInst
ispec
                 , Name
n <- NameSet -> [Name]
nameSetElemsStable (NameSet -> [Name]) -> NameSet -> [Name]
forall a b. (a -> b) -> a -> b
$ ClsInst -> NameSet
orphNamesOfClsInst ClsInst
ispec
                 ]
       ; let fam_index = (Seq FamInst -> Seq FamInst -> Seq FamInst)
-> [(Name, Seq FamInst)] -> Map Name (Seq FamInst)
forall k a. Ord k => (a -> a -> a) -> [(k, a)] -> Map k a
Map.fromListWith Seq FamInst -> Seq FamInst -> Seq FamInst
forall a. Monoid a => a -> a -> a
mappend
                 [ (Name
n, FamInst -> Seq FamInst
forall a. a -> Seq a
Seq.singleton FamInst
fispec)
                 | FamInst
fispec <- FamInstEnv -> [FamInst]
famInstEnvElts FamInstEnv
home_fie [FamInst] -> [FamInst] -> [FamInst]
forall a. [a] -> [a] -> [a]
++ FamInstEnv -> [FamInst]
famInstEnvElts FamInstEnv
pkg_fie
                 , Name
n <- NameSet -> [Name]
nameSetElemsStable (NameSet -> [Name]) -> NameSet -> [Name]
forall a b. (a -> b) -> a -> b
$ FamInst -> NameSet
orphNamesOfFamInst FamInst
fispec
                 ]
       ; return $ mkNameEnv $
           [ (nm, (toList clss, toList fams))
           | (nm, (clss, fams)) <- Map.toList $ Map.unionWith mappend
               (fmap (,Seq.empty) cls_index)
               (fmap (Seq.empty,) fam_index)
           ] }

-- -----------------------------------------------------------------------------
-- Misc exported utils

dataConType :: DataCon -> Type
dataConType :: DataCon -> Type
dataConType DataCon
dc = Var -> Type
idType (DataCon -> Var
dataConWrapId DataCon
dc)

-- | print a 'NamedThing', adding parentheses if the name is an operator.
pprParenSymName :: NamedThing a => a -> SDoc
pprParenSymName :: forall a. NamedThing a => a -> SDoc
pprParenSymName a
a = OccName -> SDoc -> SDoc
parenSymOcc (a -> OccName
forall a. NamedThing a => a -> OccName
getOccName a
a) (Name -> SDoc
forall a. Outputable a => a -> SDoc
ppr (a -> Name
forall a. NamedThing a => a -> Name
getName a
a))

-- ----------------------------------------------------------------------------


-- ToDo:
--   - Data and Typeable instances for HsSyn.

-- ToDo: check for small transformations that happen to the syntax in
-- the typechecker (eg. -e ==> negate e, perhaps for fromIntegral)

-- ToDo: maybe use TH syntax instead of Iface syntax?  There's already a way
-- to get from TyCons, Ids etc. to TH syntax (reify).

-- :browse will use either lm_toplev or inspect lm_interface, depending
-- on whether the module is interpreted or not.


-- Extract the filename, stringbuffer content and dynflags associed to a ModSummary
-- Given an initialised GHC session a ModSummary can be retrieved for
-- a module by using 'getModSummary'
--
-- XXX: Explain pre-conditions
getModuleSourceAndFlags :: ModSummary -> IO (String, StringBuffer, DynFlags)
getModuleSourceAndFlags :: ModSummary -> IO (FilePath, InputFileBuffer, DynFlags)
getModuleSourceAndFlags ModSummary
m = do
  case ModLocation -> Maybe FilePath
ml_hs_file (ModLocation -> Maybe FilePath) -> ModLocation -> Maybe FilePath
forall a b. (a -> b) -> a -> b
$ ModSummary -> ModLocation
ms_location ModSummary
m of
    Maybe FilePath
Nothing -> GhcApiError -> IO (FilePath, InputFileBuffer, DynFlags)
forall e a. (HasCallStack, Exception e) => e -> IO a
throwIO (GhcApiError -> IO (FilePath, InputFileBuffer, DynFlags))
-> GhcApiError -> IO (FilePath, InputFileBuffer, DynFlags)
forall a b. (a -> b) -> a -> b
$ DynFlags -> SDoc -> GhcApiError
mkApiErr (ModSummary -> DynFlags
ms_hspp_opts ModSummary
m) (FilePath -> SDoc
forall doc. IsLine doc => FilePath -> doc
text FilePath
"No source available for module " SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> Module -> SDoc
forall a. Outputable a => a -> SDoc
ppr (ModSummary -> Module
ms_mod ModSummary
m))
    Just FilePath
sourceFile -> do
        source <- FilePath -> IO InputFileBuffer
hGetStringBuffer FilePath
sourceFile
        return (sourceFile, source, ms_hspp_opts m)


-- | Return module source as token stream, including comments.
--
-- A 'Module' can be turned into a 'ModSummary' using 'getModSummary' if
-- your session is fully initialised.
-- Throws a 'GHC.Driver.Env.SourceError' on parse error.
getTokenStream :: ModSummary -> IO [Located Token]
getTokenStream :: ModSummary -> IO [Located Token]
getTokenStream ModSummary
mod = do
  (sourceFile, source, dflags) <- ModSummary -> IO (FilePath, InputFileBuffer, DynFlags)
getModuleSourceAndFlags ModSummary
mod
  let startLoc = FastString -> Int -> Int -> RealSrcLoc
mkRealSrcLoc (FilePath -> FastString
mkFastString FilePath
sourceFile) Int
1 Int
1
  case lexTokenStream (initParserOpts dflags) source startLoc of
    POk PState
_ [Located Token]
ts    -> [Located Token] -> IO [Located Token]
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return [Located Token]
ts
    PFailed PState
pst -> Messages GhcMessage -> IO [Located Token]
forall (io :: * -> *) a. MonadIO io => Messages GhcMessage -> io a
throwErrors (PsMessage -> GhcMessage
GhcPsMessage (PsMessage -> GhcMessage)
-> Messages PsMessage -> Messages GhcMessage
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> PState -> Messages PsMessage
getPsErrorMessages PState
pst)

-- | Give even more information on the source than 'getTokenStream'
-- This function allows reconstructing the source completely with
-- 'showRichTokenStream'.
getRichTokenStream :: ModSummary -> IO [(Located Token, String)]
getRichTokenStream :: ModSummary -> IO [(Located Token, FilePath)]
getRichTokenStream ModSummary
mod = do
  (sourceFile, source, dflags) <- ModSummary -> IO (FilePath, InputFileBuffer, DynFlags)
getModuleSourceAndFlags ModSummary
mod
  let startLoc = FastString -> Int -> Int -> RealSrcLoc
mkRealSrcLoc (FilePath -> FastString
mkFastString FilePath
sourceFile) Int
1 Int
1
  case lexTokenStream (initParserOpts dflags) source startLoc of
    POk PState
_ [Located Token]
ts    -> [(Located Token, FilePath)] -> IO [(Located Token, FilePath)]
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return ([(Located Token, FilePath)] -> IO [(Located Token, FilePath)])
-> [(Located Token, FilePath)] -> IO [(Located Token, FilePath)]
forall a b. (a -> b) -> a -> b
$ RealSrcLoc
-> InputFileBuffer
-> [Located Token]
-> [(Located Token, FilePath)]
addSourceToTokens RealSrcLoc
startLoc InputFileBuffer
source [Located Token]
ts
    PFailed PState
pst -> Messages GhcMessage -> IO [(Located Token, FilePath)]
forall (io :: * -> *) a. MonadIO io => Messages GhcMessage -> io a
throwErrors (PsMessage -> GhcMessage
GhcPsMessage (PsMessage -> GhcMessage)
-> Messages PsMessage -> Messages GhcMessage
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> PState -> Messages PsMessage
getPsErrorMessages PState
pst)

-- | Given a source location and a StringBuffer corresponding to this
-- location, return a rich token stream with the source associated to the
-- tokens.
addSourceToTokens :: RealSrcLoc -> StringBuffer -> [Located Token]
                  -> [(Located Token, String)]
addSourceToTokens :: RealSrcLoc
-> InputFileBuffer
-> [Located Token]
-> [(Located Token, FilePath)]
addSourceToTokens RealSrcLoc
_ InputFileBuffer
_ [] = []
addSourceToTokens RealSrcLoc
loc InputFileBuffer
buf (t :: Located Token
t@(L SrcSpan
span Token
_) : [Located Token]
ts)
    = case SrcSpan
span of
      UnhelpfulSpan UnhelpfulSpanReason
_ -> (Located Token
t,FilePath
"") (Located Token, FilePath)
-> [(Located Token, FilePath)] -> [(Located Token, FilePath)]
forall a. a -> [a] -> [a]
: RealSrcLoc
-> InputFileBuffer
-> [Located Token]
-> [(Located Token, FilePath)]
addSourceToTokens RealSrcLoc
loc InputFileBuffer
buf [Located Token]
ts
      RealSrcSpan RealSrcSpan
s Maybe BufSpan
_ -> (Located Token
t,FilePath
str) (Located Token, FilePath)
-> [(Located Token, FilePath)] -> [(Located Token, FilePath)]
forall a. a -> [a] -> [a]
: RealSrcLoc
-> InputFileBuffer
-> [Located Token]
-> [(Located Token, FilePath)]
addSourceToTokens RealSrcLoc
newLoc InputFileBuffer
newBuf [Located Token]
ts
        where
          (RealSrcLoc
newLoc, InputFileBuffer
newBuf, FilePath
str) = FilePath
-> RealSrcLoc
-> InputFileBuffer
-> (RealSrcLoc, InputFileBuffer, FilePath)
go FilePath
"" RealSrcLoc
loc InputFileBuffer
buf
          start :: RealSrcLoc
start = RealSrcSpan -> RealSrcLoc
realSrcSpanStart RealSrcSpan
s
          end :: RealSrcLoc
end = RealSrcSpan -> RealSrcLoc
realSrcSpanEnd RealSrcSpan
s
          go :: FilePath
-> RealSrcLoc
-> InputFileBuffer
-> (RealSrcLoc, InputFileBuffer, FilePath)
go FilePath
acc RealSrcLoc
loc InputFileBuffer
buf | RealSrcLoc
loc RealSrcLoc -> RealSrcLoc -> Bool
forall a. Ord a => a -> a -> Bool
< RealSrcLoc
start = FilePath
-> RealSrcLoc
-> InputFileBuffer
-> (RealSrcLoc, InputFileBuffer, FilePath)
go FilePath
acc RealSrcLoc
nLoc InputFileBuffer
nBuf
                         | RealSrcLoc
start RealSrcLoc -> RealSrcLoc -> Bool
forall a. Ord a => a -> a -> Bool
<= RealSrcLoc
loc Bool -> Bool -> Bool
&& RealSrcLoc
loc RealSrcLoc -> RealSrcLoc -> Bool
forall a. Ord a => a -> a -> Bool
< RealSrcLoc
end = FilePath
-> RealSrcLoc
-> InputFileBuffer
-> (RealSrcLoc, InputFileBuffer, FilePath)
go (Char
chChar -> FilePath -> FilePath
forall a. a -> [a] -> [a]
:FilePath
acc) RealSrcLoc
nLoc InputFileBuffer
nBuf
                         | Bool
otherwise = (RealSrcLoc
loc, InputFileBuffer
buf, FilePath -> FilePath
forall a. [a] -> [a]
reverse FilePath
acc)
              where (Char
ch, InputFileBuffer
nBuf) = InputFileBuffer -> (Char, InputFileBuffer)
nextChar InputFileBuffer
buf
                    nLoc :: RealSrcLoc
nLoc = RealSrcLoc -> Char -> RealSrcLoc
advanceSrcLoc RealSrcLoc
loc Char
ch


-- | Take a rich token stream such as produced from 'getRichTokenStream' and
-- return source code almost identical to the original code (except for
-- insignificant whitespace.)
showRichTokenStream :: [(Located Token, String)] -> String
showRichTokenStream :: [(Located Token, FilePath)] -> FilePath
showRichTokenStream [(Located Token, FilePath)]
ts = RealSrcLoc -> [(Located Token, FilePath)] -> FilePath -> FilePath
forall {e}.
RealSrcLoc
-> [(GenLocated SrcSpan e, FilePath)] -> FilePath -> FilePath
go RealSrcLoc
startLoc [(Located Token, FilePath)]
ts FilePath
""
    where sourceFile :: FastString
sourceFile = [SrcSpan] -> FastString
getFile ([SrcSpan] -> FastString) -> [SrcSpan] -> FastString
forall a b. (a -> b) -> a -> b
$ ((Located Token, FilePath) -> SrcSpan)
-> [(Located Token, FilePath)] -> [SrcSpan]
forall a b. (a -> b) -> [a] -> [b]
map (Located Token -> SrcSpan
forall l e. GenLocated l e -> l
getLoc (Located Token -> SrcSpan)
-> ((Located Token, FilePath) -> Located Token)
-> (Located Token, FilePath)
-> SrcSpan
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Located Token, FilePath) -> Located Token
forall a b. (a, b) -> a
fst) [(Located Token, FilePath)]
ts
          getFile :: [SrcSpan] -> FastString
getFile [] = FilePath -> FastString
forall a. HasCallStack => FilePath -> a
panic FilePath
"showRichTokenStream: No source file found"
          getFile (UnhelpfulSpan UnhelpfulSpanReason
_ : [SrcSpan]
xs) = [SrcSpan] -> FastString
getFile [SrcSpan]
xs
          getFile (RealSrcSpan RealSrcSpan
s Maybe BufSpan
_ : [SrcSpan]
_) = RealSrcSpan -> FastString
srcSpanFile RealSrcSpan
s
          startLoc :: RealSrcLoc
startLoc = FastString -> Int -> Int -> RealSrcLoc
mkRealSrcLoc FastString
sourceFile Int
1 Int
1
          go :: RealSrcLoc
-> [(GenLocated SrcSpan e, FilePath)] -> FilePath -> FilePath
go RealSrcLoc
_ [] = FilePath -> FilePath
forall a. a -> a
id
          go RealSrcLoc
loc ((L SrcSpan
span e
_, FilePath
str):[(GenLocated SrcSpan e, FilePath)]
ts)
              = case SrcSpan
span of
                UnhelpfulSpan UnhelpfulSpanReason
_ -> RealSrcLoc
-> [(GenLocated SrcSpan e, FilePath)] -> FilePath -> FilePath
go RealSrcLoc
loc [(GenLocated SrcSpan e, FilePath)]
ts
                RealSrcSpan RealSrcSpan
s Maybe BufSpan
_
                 | Int
locLine Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== Int
tokLine -> ((Int -> Char -> FilePath
forall a. Int -> a -> [a]
replicate (Int
tokCol Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
locCol) Char
' ') FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++)
                                       (FilePath -> FilePath)
-> (FilePath -> FilePath) -> FilePath -> FilePath
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (FilePath
str FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++)
                                       (FilePath -> FilePath)
-> (FilePath -> FilePath) -> FilePath -> FilePath
forall b c a. (b -> c) -> (a -> b) -> a -> c
. RealSrcLoc
-> [(GenLocated SrcSpan e, FilePath)] -> FilePath -> FilePath
go RealSrcLoc
tokEnd [(GenLocated SrcSpan e, FilePath)]
ts
                 | Bool
otherwise -> ((Int -> Char -> FilePath
forall a. Int -> a -> [a]
replicate (Int
tokLine Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
locLine) Char
'\n') FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++)
                               (FilePath -> FilePath)
-> (FilePath -> FilePath) -> FilePath -> FilePath
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ((Int -> Char -> FilePath
forall a. Int -> a -> [a]
replicate (Int
tokCol Int -> Int -> Int
forall a. Num a => a -> a -> a
- Int
1) Char
' ') FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++)
                              (FilePath -> FilePath)
-> (FilePath -> FilePath) -> FilePath -> FilePath
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (FilePath
str FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++)
                              (FilePath -> FilePath)
-> (FilePath -> FilePath) -> FilePath -> FilePath
forall b c a. (b -> c) -> (a -> b) -> a -> c
. RealSrcLoc
-> [(GenLocated SrcSpan e, FilePath)] -> FilePath -> FilePath
go RealSrcLoc
tokEnd [(GenLocated SrcSpan e, FilePath)]
ts
                  where (Int
locLine, Int
locCol) = (RealSrcLoc -> Int
srcLocLine RealSrcLoc
loc, RealSrcLoc -> Int
srcLocCol RealSrcLoc
loc)
                        (Int
tokLine, Int
tokCol) = (RealSrcSpan -> Int
srcSpanStartLine RealSrcSpan
s, RealSrcSpan -> Int
srcSpanStartCol RealSrcSpan
s)
                        tokEnd :: RealSrcLoc
tokEnd = RealSrcSpan -> RealSrcLoc
realSrcSpanEnd RealSrcSpan
s

-- -----------------------------------------------------------------------------
-- Interactive evaluation

-- | Takes a 'ModuleName' and possibly a 'UnitId', and consults the
-- filesystem and package database to find the corresponding 'Module',
-- using the algorithm that is used for an @import@ declaration.
findModule :: GhcMonad m => ModuleName -> Maybe FastString -> m Module
findModule :: forall (m :: * -> *).
GhcMonad m =>
ModuleName -> Maybe FastString -> m Module
findModule ModuleName
mod_name Maybe FastString
maybe_pkg = do
  pkg_qual <- ModuleName -> Maybe FastString -> m PkgQual
forall (m :: * -> *).
GhcMonad m =>
ModuleName -> Maybe FastString -> m PkgQual
renamePkgQualM ModuleName
mod_name Maybe FastString
maybe_pkg
  findQualifiedModule pkg_qual mod_name


findQualifiedModule :: GhcMonad m => PkgQual -> ModuleName -> m Module
findQualifiedModule :: forall (m :: * -> *).
GhcMonad m =>
PkgQual -> ModuleName -> m Module
findQualifiedModule PkgQual
pkgqual ModuleName
mod_name = (HscEnv -> m Module) -> m Module
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m Module) -> m Module)
-> (HscEnv -> m Module) -> m Module
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
  IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ Logger -> SDoc -> IO ()
trace_if (HscEnv -> Logger
hsc_logger HscEnv
hsc_env) (FilePath -> SDoc
forall doc. IsLine doc => FilePath -> doc
text FilePath
"findQualifiedModule" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
mod_name SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> PkgQual -> SDoc
forall a. Outputable a => a -> SDoc
ppr PkgQual
pkgqual)
  let mhome_unit :: Maybe HomeUnit
mhome_unit = HscEnv -> Maybe HomeUnit
hsc_home_unit_maybe HscEnv
hsc_env
  let dflags :: DynFlags
dflags    = HscEnv -> DynFlags
hsc_dflags HscEnv
hsc_env
  case PkgQual
pkgqual of
    ThisPkg UnitId
uid -> do
      home <- UnitId -> ModuleName -> m (Maybe Module)
forall (m :: * -> *).
GhcMonad m =>
UnitId -> ModuleName -> m (Maybe Module)
lookupLoadedHomeModule UnitId
uid ModuleName
mod_name
      case home of
        Just Module
m  -> Module -> m Module
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return Module
m
        Maybe Module
Nothing -> IO Module -> m Module
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Module -> m Module) -> IO Module -> m Module
forall a b. (a -> b) -> a -> b
$ do
           res <- HscEnv -> ModuleName -> PkgQual -> IO FindResult
findImportedModule HscEnv
hsc_env ModuleName
mod_name PkgQual
pkgqual
           case res of
             Found ModLocation
loc Module
m | Maybe HomeUnit -> Module -> Bool
notHomeModuleMaybe Maybe HomeUnit
mhome_unit Module
m -> Module -> IO Module
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Module
m
                         | Bool
otherwise -> DynFlags -> Module -> ModLocation -> IO Module
forall a. DynFlags -> Module -> ModLocation -> IO a
modNotLoadedError DynFlags
dflags Module
m ModLocation
loc
             FindResult
err -> MsgEnvelope GhcMessage -> IO Module
forall (io :: * -> *) a.
MonadIO io =>
MsgEnvelope GhcMessage -> io a
throwOneError (MsgEnvelope GhcMessage -> IO Module)
-> MsgEnvelope GhcMessage -> IO Module
forall a b. (a -> b) -> a -> b
$ HscEnv
-> SrcSpan -> ModuleName -> FindResult -> MsgEnvelope GhcMessage
noModError HscEnv
hsc_env SrcSpan
noSrcSpan ModuleName
mod_name FindResult
err

    PkgQual
_ -> IO Module -> m Module
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Module -> m Module) -> IO Module -> m Module
forall a b. (a -> b) -> a -> b
$ do
      res <- HscEnv -> ModuleName -> PkgQual -> IO FindResult
findImportedModule HscEnv
hsc_env ModuleName
mod_name PkgQual
pkgqual
      case res of
        Found ModLocation
_ Module
m -> Module -> IO Module
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Module
m
        FindResult
err       -> MsgEnvelope GhcMessage -> IO Module
forall (io :: * -> *) a.
MonadIO io =>
MsgEnvelope GhcMessage -> io a
throwOneError (MsgEnvelope GhcMessage -> IO Module)
-> MsgEnvelope GhcMessage -> IO Module
forall a b. (a -> b) -> a -> b
$ HscEnv
-> SrcSpan -> ModuleName -> FindResult -> MsgEnvelope GhcMessage
noModError HscEnv
hsc_env SrcSpan
noSrcSpan ModuleName
mod_name FindResult
err


modNotLoadedError :: DynFlags -> Module -> ModLocation -> IO a
modNotLoadedError :: forall a. DynFlags -> Module -> ModLocation -> IO a
modNotLoadedError DynFlags
dflags Module
m ModLocation
loc = GhcException -> IO a
forall a. GhcException -> IO a
throwGhcExceptionIO (GhcException -> IO a) -> GhcException -> IO a
forall a b. (a -> b) -> a -> b
$ FilePath -> GhcException
CmdLineError (FilePath -> GhcException) -> FilePath -> GhcException
forall a b. (a -> b) -> a -> b
$ DynFlags -> SDoc -> FilePath
showSDoc DynFlags
dflags (SDoc -> FilePath) -> SDoc -> FilePath
forall a b. (a -> b) -> a -> b
$
   FilePath -> SDoc
forall doc. IsLine doc => FilePath -> doc
text FilePath
"module is not loaded:" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+>
   SDoc -> SDoc
quotes (ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
m)) SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+>
   SDoc -> SDoc
forall doc. IsLine doc => doc -> doc
parens (FilePath -> SDoc
forall doc. IsLine doc => FilePath -> doc
text (FilePath -> Maybe FilePath -> FilePath
forall a. HasDebugCallStack => FilePath -> Maybe a -> a
expectJust FilePath
"modNotLoadedError" (ModLocation -> Maybe FilePath
ml_hs_file ModLocation
loc)))

renamePkgQualM :: GhcMonad m => ModuleName -> Maybe FastString -> m PkgQual
renamePkgQualM :: forall (m :: * -> *).
GhcMonad m =>
ModuleName -> Maybe FastString -> m PkgQual
renamePkgQualM ModuleName
mn Maybe FastString
p = (HscEnv -> m PkgQual) -> m PkgQual
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m PkgQual) -> m PkgQual)
-> (HscEnv -> m PkgQual) -> m PkgQual
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> PkgQual -> m PkgQual
forall a. a -> m a
forall (f :: * -> *) a. Applicative f => a -> f a
pure (UnitEnv -> ModuleName -> Maybe FastString -> PkgQual
renamePkgQual (HscEnv -> UnitEnv
hsc_unit_env HscEnv
hsc_env) ModuleName
mn Maybe FastString
p)

renameRawPkgQualM :: GhcMonad m => ModuleName -> RawPkgQual -> m PkgQual
renameRawPkgQualM :: forall (m :: * -> *).
GhcMonad m =>
ModuleName -> RawPkgQual -> m PkgQual
renameRawPkgQualM ModuleName
mn RawPkgQual
p = (HscEnv -> m PkgQual) -> m PkgQual
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m PkgQual) -> m PkgQual)
-> (HscEnv -> m PkgQual) -> m PkgQual
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> PkgQual -> m PkgQual
forall a. a -> m a
forall (f :: * -> *) a. Applicative f => a -> f a
pure (UnitEnv -> ModuleName -> RawPkgQual -> PkgQual
renameRawPkgQual (HscEnv -> UnitEnv
hsc_unit_env HscEnv
hsc_env) ModuleName
mn RawPkgQual
p)

-- | Like 'findModule', but differs slightly when the module refers to
-- a source file, and the file has not been loaded via 'load'.  In
-- this case, 'findModule' will throw an error (module not loaded),
-- but 'lookupModule' will check to see whether the module can also be
-- found in a package, and if so, that package 'Module' will be
-- returned.  If not, the usual module-not-found error will be thrown.
--
lookupModule :: GhcMonad m => ModuleName -> Maybe FastString -> m Module
lookupModule :: forall (m :: * -> *).
GhcMonad m =>
ModuleName -> Maybe FastString -> m Module
lookupModule ModuleName
mod_name Maybe FastString
maybe_pkg = do
  pkgqual <- ModuleName -> Maybe FastString -> m PkgQual
forall (m :: * -> *).
GhcMonad m =>
ModuleName -> Maybe FastString -> m PkgQual
renamePkgQualM ModuleName
mod_name Maybe FastString
maybe_pkg
  lookupQualifiedModule pkgqual mod_name

lookupQualifiedModule :: GhcMonad m => PkgQual -> ModuleName -> m Module
lookupQualifiedModule :: forall (m :: * -> *).
GhcMonad m =>
PkgQual -> ModuleName -> m Module
lookupQualifiedModule PkgQual
NoPkgQual ModuleName
mod_name = (HscEnv -> m Module) -> m Module
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m Module) -> m Module)
-> (HscEnv -> m Module) -> m Module
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
  home <- UnitId -> ModuleName -> m (Maybe Module)
forall (m :: * -> *).
GhcMonad m =>
UnitId -> ModuleName -> m (Maybe Module)
lookupLoadedHomeModule (HomeUnit -> UnitId
forall u. GenHomeUnit u -> UnitId
homeUnitId (HomeUnit -> UnitId) -> HomeUnit -> UnitId
forall a b. (a -> b) -> a -> b
$ HscEnv -> HomeUnit
hsc_home_unit HscEnv
hsc_env) ModuleName
mod_name
  case home of
    Just Module
m  -> Module -> m Module
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return Module
m
    Maybe Module
Nothing -> IO Module -> m Module
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Module -> m Module) -> IO Module -> m Module
forall a b. (a -> b) -> a -> b
$ do
      let fc :: FinderCache
fc     = HscEnv -> FinderCache
hsc_FC HscEnv
hsc_env
      let units :: UnitState
units  = HasDebugCallStack => HscEnv -> UnitState
HscEnv -> UnitState
hsc_units HscEnv
hsc_env
      let dflags :: DynFlags
dflags = HscEnv -> DynFlags
hsc_dflags HscEnv
hsc_env
      let fopts :: FinderOpts
fopts  = DynFlags -> FinderOpts
initFinderOpts DynFlags
dflags
      res <- FinderCache
-> FinderOpts
-> UnitState
-> ModuleName
-> PkgQual
-> IO FindResult
findExposedPackageModule FinderCache
fc FinderOpts
fopts UnitState
units ModuleName
mod_name PkgQual
NoPkgQual
      case res of
        Found ModLocation
_ Module
m -> Module -> IO Module
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return Module
m
        FindResult
err       -> MsgEnvelope GhcMessage -> IO Module
forall (io :: * -> *) a.
MonadIO io =>
MsgEnvelope GhcMessage -> io a
throwOneError (MsgEnvelope GhcMessage -> IO Module)
-> MsgEnvelope GhcMessage -> IO Module
forall a b. (a -> b) -> a -> b
$ HscEnv
-> SrcSpan -> ModuleName -> FindResult -> MsgEnvelope GhcMessage
noModError HscEnv
hsc_env SrcSpan
noSrcSpan ModuleName
mod_name FindResult
err
lookupQualifiedModule PkgQual
pkgqual ModuleName
mod_name = PkgQual -> ModuleName -> m Module
forall (m :: * -> *).
GhcMonad m =>
PkgQual -> ModuleName -> m Module
findQualifiedModule PkgQual
pkgqual ModuleName
mod_name

lookupLoadedHomeModule :: GhcMonad m => UnitId -> ModuleName -> m (Maybe Module)
lookupLoadedHomeModule :: forall (m :: * -> *).
GhcMonad m =>
UnitId -> ModuleName -> m (Maybe Module)
lookupLoadedHomeModule UnitId
uid ModuleName
mod_name = (HscEnv -> m (Maybe Module)) -> m (Maybe Module)
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m (Maybe Module)) -> m (Maybe Module))
-> (HscEnv -> m (Maybe Module)) -> m (Maybe Module)
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
  IO () -> m ()
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO () -> m ()) -> IO () -> m ()
forall a b. (a -> b) -> a -> b
$ Logger -> SDoc -> IO ()
trace_if (HscEnv -> Logger
hsc_logger HscEnv
hsc_env) (FilePath -> SDoc
forall doc. IsLine doc => FilePath -> doc
text FilePath
"lookupLoadedHomeModule" SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
mod_name SDoc -> SDoc -> SDoc
forall doc. IsLine doc => doc -> doc -> doc
<+> UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr UnitId
uid)
  case UnitEnvGraph HomeUnitEnv
-> UnitId -> ModuleName -> Maybe HomeModInfo
lookupHug  (HscEnv -> UnitEnvGraph HomeUnitEnv
hsc_HUG HscEnv
hsc_env) UnitId
uid ModuleName
mod_name  of
    Just HomeModInfo
mod_info      -> Maybe Module -> m (Maybe Module)
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (Module -> Maybe Module
forall a. a -> Maybe a
Just (ModIface -> Module
forall (phase :: ModIfacePhase). ModIface_ phase -> Module
mi_module (HomeModInfo -> ModIface
hm_iface HomeModInfo
mod_info)))
    Maybe HomeModInfo
_not_a_home_module -> Maybe Module -> m (Maybe Module)
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe Module
forall a. Maybe a
Nothing

-- | Check that a module is safe to import (according to Safe Haskell).
--
-- We return True to indicate the import is safe and False otherwise
-- although in the False case an error may be thrown first.
isModuleTrusted :: GhcMonad m => Module -> m Bool
isModuleTrusted :: forall (m :: * -> *). GhcMonad m => Module -> m Bool
isModuleTrusted Module
m = (HscEnv -> m Bool) -> m Bool
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m Bool) -> m Bool) -> (HscEnv -> m Bool) -> m Bool
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
    IO Bool -> m Bool
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Bool -> m Bool) -> IO Bool -> m Bool
forall a b. (a -> b) -> a -> b
$ HscEnv -> Module -> SrcSpan -> IO Bool
hscCheckSafe HscEnv
hsc_env Module
m SrcSpan
noSrcSpan

-- | Return if a module is trusted and the pkgs it depends on to be trusted.
moduleTrustReqs :: GhcMonad m => Module -> m (Bool, Set UnitId)
moduleTrustReqs :: forall (m :: * -> *). GhcMonad m => Module -> m (Bool, Set UnitId)
moduleTrustReqs Module
m = (HscEnv -> m (Bool, Set UnitId)) -> m (Bool, Set UnitId)
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m (Bool, Set UnitId)) -> m (Bool, Set UnitId))
-> (HscEnv -> m (Bool, Set UnitId)) -> m (Bool, Set UnitId)
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
    IO (Bool, Set UnitId) -> m (Bool, Set UnitId)
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (Bool, Set UnitId) -> m (Bool, Set UnitId))
-> IO (Bool, Set UnitId) -> m (Bool, Set UnitId)
forall a b. (a -> b) -> a -> b
$ HscEnv -> Module -> SrcSpan -> IO (Bool, Set UnitId)
hscGetSafe HscEnv
hsc_env Module
m SrcSpan
noSrcSpan

-- | Set the monad GHCi lifts user statements into.
--
-- Checks that a type (in string form) is an instance of the
-- @GHC.GHCi.GHCiSandboxIO@ type class. Sets it to be the GHCi monad if it is,
-- throws an error otherwise.
setGHCiMonad :: GhcMonad m => String -> m ()
setGHCiMonad :: forall (m :: * -> *). GhcMonad m => FilePath -> m ()
setGHCiMonad FilePath
name = (HscEnv -> m ()) -> m ()
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m ()) -> m ()) -> (HscEnv -> m ()) -> m ()
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env -> do
    ty <- IO Name -> m Name
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Name -> m Name) -> IO Name -> m Name
forall a b. (a -> b) -> a -> b
$ HscEnv -> FilePath -> IO Name
hscIsGHCiMonad HscEnv
hsc_env FilePath
name
    modifySession $ \HscEnv
s ->
        let ic :: InteractiveContext
ic = (HscEnv -> InteractiveContext
hsc_IC HscEnv
s) { ic_monad = ty }
        in HscEnv
s { hsc_IC = ic }

-- | Get the monad GHCi lifts user statements into.
getGHCiMonad :: GhcMonad m => m Name
getGHCiMonad :: forall (m :: * -> *). GhcMonad m => m Name
getGHCiMonad = (HscEnv -> Name) -> m HscEnv -> m Name
forall a b. (a -> b) -> m a -> m b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (InteractiveContext -> Name
ic_monad (InteractiveContext -> Name)
-> (HscEnv -> InteractiveContext) -> HscEnv -> Name
forall b c a. (b -> c) -> (a -> b) -> a -> c
. HscEnv -> InteractiveContext
hsc_IC) m HscEnv
forall (m :: * -> *). GhcMonad m => m HscEnv
getSession

getHistorySpan :: GhcMonad m => History -> m SrcSpan
getHistorySpan :: forall (m :: * -> *). GhcMonad m => History -> m SrcSpan
getHistorySpan History
h = (HscEnv -> m SrcSpan) -> m SrcSpan
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m SrcSpan) -> m SrcSpan)
-> (HscEnv -> m SrcSpan) -> m SrcSpan
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
    SrcSpan -> m SrcSpan
forall a. a -> m a
forall (m :: * -> *) a. Monad m => a -> m a
return (SrcSpan -> m SrcSpan) -> SrcSpan -> m SrcSpan
forall a b. (a -> b) -> a -> b
$ HscEnv -> History -> SrcSpan
GHC.Runtime.Eval.getHistorySpan HscEnv
hsc_env History
h

obtainTermFromVal :: GhcMonad m => Int ->  Bool -> Type -> a -> m Term
obtainTermFromVal :: forall (m :: * -> *) a.
GhcMonad m =>
Int -> Bool -> Type -> a -> m Term
obtainTermFromVal Int
bound Bool
force Type
ty a
a = (HscEnv -> m Term) -> m Term
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m Term) -> m Term) -> (HscEnv -> m Term) -> m Term
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
    IO Term -> m Term
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Term -> m Term) -> IO Term -> m Term
forall a b. (a -> b) -> a -> b
$ HscEnv -> Int -> Bool -> Type -> a -> IO Term
forall a. HscEnv -> Int -> Bool -> Type -> a -> IO Term
GHC.Runtime.Eval.obtainTermFromVal HscEnv
hsc_env Int
bound Bool
force Type
ty a
a

obtainTermFromId :: GhcMonad m => Int -> Bool -> Id -> m Term
obtainTermFromId :: forall (m :: * -> *). GhcMonad m => Int -> Bool -> Var -> m Term
obtainTermFromId Int
bound Bool
force Var
id = (HscEnv -> m Term) -> m Term
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m Term) -> m Term) -> (HscEnv -> m Term) -> m Term
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
    IO Term -> m Term
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO Term -> m Term) -> IO Term -> m Term
forall a b. (a -> b) -> a -> b
$ HscEnv -> Int -> Bool -> Var -> IO Term
GHC.Runtime.Eval.obtainTermFromId HscEnv
hsc_env Int
bound Bool
force Var
id


-- | Returns the 'TyThing' for a 'Name'.  The 'Name' may refer to any
-- entity known to GHC, including 'Name's defined using 'runStmt'.
lookupName :: GhcMonad m => Name -> m (Maybe TyThing)
lookupName :: forall (m :: * -> *). GhcMonad m => Name -> m (Maybe TyThing)
lookupName Name
name =
     (HscEnv -> m (Maybe TyThing)) -> m (Maybe TyThing)
forall (m :: * -> *) a. GhcMonad m => (HscEnv -> m a) -> m a
withSession ((HscEnv -> m (Maybe TyThing)) -> m (Maybe TyThing))
-> (HscEnv -> m (Maybe TyThing)) -> m (Maybe TyThing)
forall a b. (a -> b) -> a -> b
$ \HscEnv
hsc_env ->
       IO (Maybe TyThing) -> m (Maybe TyThing)
forall a. IO a -> m a
forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (IO (Maybe TyThing) -> m (Maybe TyThing))
-> IO (Maybe TyThing) -> m (Maybe TyThing)
forall a b. (a -> b) -> a -> b
$ HscEnv -> Name -> IO (Maybe TyThing)
hscTcRcLookupName HscEnv
hsc_env Name
name

-- -----------------------------------------------------------------------------
-- Pure API

-- | A pure interface to the module parser.
--
parser :: String         -- ^ Haskell module source text (full Unicode is supported)
       -> DynFlags       -- ^ the flags
       -> FilePath       -- ^ the filename (for source locations)
       -> (WarningMessages, Either ErrorMessages (Located (HsModule GhcPs)))

parser :: FilePath
-> DynFlags
-> FilePath
-> (Messages GhcMessage, Either (Messages GhcMessage) ParsedSource)
parser FilePath
str DynFlags
dflags FilePath
filename =
   let
       loc :: RealSrcLoc
loc  = FastString -> Int -> Int -> RealSrcLoc
mkRealSrcLoc (FilePath -> FastString
mkFastString FilePath
filename) Int
1 Int
1
       buf :: InputFileBuffer
buf  = FilePath -> InputFileBuffer
stringToStringBuffer FilePath
str
   in
   case P ParsedSource -> PState -> ParseResult ParsedSource
forall a. P a -> PState -> ParseResult a
unP P ParsedSource
Parser.parseModule (ParserOpts -> InputFileBuffer -> RealSrcLoc -> PState
initParserState (DynFlags -> ParserOpts
initParserOpts DynFlags
dflags) InputFileBuffer
buf RealSrcLoc
loc) of

     PFailed PState
pst ->
         let (Messages PsMessage
warns,Messages PsMessage
errs) = PState -> (Messages PsMessage, Messages PsMessage)
getPsMessages PState
pst in
         (PsMessage -> GhcMessage
GhcPsMessage (PsMessage -> GhcMessage)
-> Messages PsMessage -> Messages GhcMessage
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Messages PsMessage
warns, Messages GhcMessage -> Either (Messages GhcMessage) ParsedSource
forall a b. a -> Either a b
Left (Messages GhcMessage -> Either (Messages GhcMessage) ParsedSource)
-> Messages GhcMessage -> Either (Messages GhcMessage) ParsedSource
forall a b. (a -> b) -> a -> b
$ PsMessage -> GhcMessage
GhcPsMessage (PsMessage -> GhcMessage)
-> Messages PsMessage -> Messages GhcMessage
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Messages PsMessage
errs)

     POk PState
pst ParsedSource
rdr_module ->
         let (Messages PsMessage
warns,Messages PsMessage
_) = PState -> (Messages PsMessage, Messages PsMessage)
getPsMessages PState
pst in
         (PsMessage -> GhcMessage
GhcPsMessage (PsMessage -> GhcMessage)
-> Messages PsMessage -> Messages GhcMessage
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> Messages PsMessage
warns, ParsedSource -> Either (Messages GhcMessage) ParsedSource
forall a b. b -> Either a b
Right ParsedSource
rdr_module)

-- -----------------------------------------------------------------------------
-- | Find the package environment (if one exists)
--
-- We interpret the package environment as a set of package flags; to be
-- specific, if we find a package environment file like
--
-- > clear-package-db
-- > global-package-db
-- > package-db blah/package.conf.d
-- > package-id id1
-- > package-id id2
--
-- we interpret this as
--
-- > [ -hide-all-packages
-- > , -clear-package-db
-- > , -global-package-db
-- > , -package-db blah/package.conf.d
-- > , -package-id id1
-- > , -package-id id2
-- > ]
--
-- There's also an older syntax alias for package-id, which is just an
-- unadorned package id
--
-- > id1
-- > id2
--
interpretPackageEnv :: Logger -> DynFlags -> IO DynFlags
interpretPackageEnv :: Logger -> DynFlags -> IO DynFlags
interpretPackageEnv Logger
logger DynFlags
dflags = do
    mPkgEnv <- MaybeT IO FilePath -> IO (Maybe FilePath)
forall (m :: * -> *) a. MaybeT m a -> m (Maybe a)
runMaybeT (MaybeT IO FilePath -> IO (Maybe FilePath))
-> MaybeT IO FilePath -> IO (Maybe FilePath)
forall a b. (a -> b) -> a -> b
$ [MaybeT IO FilePath] -> MaybeT IO FilePath
forall (t :: * -> *) (m :: * -> *) a.
(Foldable t, MonadPlus m) =>
t (m a) -> m a
msum ([MaybeT IO FilePath] -> MaybeT IO FilePath)
-> [MaybeT IO FilePath] -> MaybeT IO FilePath
forall a b. (a -> b) -> a -> b
$ [
                   MaybeT IO FilePath
getCmdLineArg MaybeT IO FilePath
-> (FilePath -> MaybeT IO FilePath) -> MaybeT IO FilePath
forall a b. MaybeT IO a -> (a -> MaybeT IO b) -> MaybeT IO b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \FilePath
env -> [MaybeT IO FilePath] -> MaybeT IO FilePath
forall (t :: * -> *) (m :: * -> *) a.
(Foldable t, MonadPlus m) =>
t (m a) -> m a
msum [
                       FilePath -> MaybeT IO FilePath
probeNullEnv FilePath
env
                     , FilePath -> MaybeT IO FilePath
probeEnvFile FilePath
env
                     , FilePath -> MaybeT IO FilePath
probeEnvName FilePath
env
                     , FilePath -> MaybeT IO FilePath
forall a. FilePath -> MaybeT IO a
cmdLineError FilePath
env
                     ]
                 , MaybeT IO FilePath
getEnvVar MaybeT IO FilePath
-> (FilePath -> MaybeT IO FilePath) -> MaybeT IO FilePath
forall a b. MaybeT IO a -> (a -> MaybeT IO b) -> MaybeT IO b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \FilePath
env -> [MaybeT IO FilePath] -> MaybeT IO FilePath
forall (t :: * -> *) (m :: * -> *) a.
(Foldable t, MonadPlus m) =>
t (m a) -> m a
msum [
                       FilePath -> MaybeT IO FilePath
probeNullEnv FilePath
env
                     , FilePath -> MaybeT IO FilePath
probeEnvFile FilePath
env
                     , FilePath -> MaybeT IO FilePath
probeEnvName FilePath
env
                     , FilePath -> MaybeT IO FilePath
forall a. FilePath -> MaybeT IO a
envError     FilePath
env
                     ]
                 , MaybeT IO ()
notIfHideAllPackages MaybeT IO () -> MaybeT IO FilePath -> MaybeT IO FilePath
forall a b. MaybeT IO a -> MaybeT IO b -> MaybeT IO b
forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
>> [MaybeT IO FilePath] -> MaybeT IO FilePath
forall (t :: * -> *) (m :: * -> *) a.
(Foldable t, MonadPlus m) =>
t (m a) -> m a
msum [
                       MaybeT IO FilePath
findLocalEnvFile MaybeT IO FilePath
-> (FilePath -> MaybeT IO FilePath) -> MaybeT IO FilePath
forall a b. MaybeT IO a -> (a -> MaybeT IO b) -> MaybeT IO b
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= FilePath -> MaybeT IO FilePath
probeEnvFile
                     , FilePath -> MaybeT IO FilePath
probeEnvName FilePath
defaultEnvName
                     ]
                 ]
    case mPkgEnv of
      Maybe FilePath
Nothing ->
        -- No environment found. Leave DynFlags unchanged.
        DynFlags -> IO DynFlags
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return DynFlags
dflags
      Just FilePath
"-" -> do
        -- Explicitly disabled environment file. Leave DynFlags unchanged.
        DynFlags -> IO DynFlags
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return DynFlags
dflags
      Just FilePath
envfile -> do
        content <- FilePath -> IO FilePath
readFile FilePath
envfile
        compilationProgressMsg logger (text "Loaded package environment from " <> text envfile)
        let (_, dflags') = runCmdLineP (runEwM (setFlagsFromEnvFile envfile content)) dflags

        return dflags'
  where
    -- Loading environments (by name or by location)

    archOS :: ArchOS
archOS = Platform -> ArchOS
platformArchOS (DynFlags -> Platform
targetPlatform DynFlags
dflags)

    namedEnvPath :: String -> MaybeT IO FilePath
    namedEnvPath :: FilePath -> MaybeT IO FilePath
namedEnvPath FilePath
name = do
     appdir <- FilePath -> ArchOS -> MaybeT IO FilePath
versionedAppDir (DynFlags -> FilePath
programName DynFlags
dflags) ArchOS
archOS
     return $ appdir </> "environments" </> name

    probeEnvName :: String -> MaybeT IO FilePath
    probeEnvName :: FilePath -> MaybeT IO FilePath
probeEnvName FilePath
name = FilePath -> MaybeT IO FilePath
probeEnvFile (FilePath -> MaybeT IO FilePath)
-> MaybeT IO FilePath -> MaybeT IO FilePath
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< FilePath -> MaybeT IO FilePath
namedEnvPath FilePath
name

    probeEnvFile :: FilePath -> MaybeT IO FilePath
    probeEnvFile :: FilePath -> MaybeT IO FilePath
probeEnvFile FilePath
path = do
      Bool -> MaybeT IO ()
forall (f :: * -> *). Alternative f => Bool -> f ()
guard (Bool -> MaybeT IO ()) -> MaybeT IO Bool -> MaybeT IO ()
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< IO Bool -> MaybeT IO Bool
forall (m :: * -> *) a. Monad m => m a -> MaybeT m a
liftMaybeT (FilePath -> IO Bool
doesFileExist FilePath
path)
      FilePath -> MaybeT IO FilePath
forall a. a -> MaybeT IO a
forall (m :: * -> *) a. Monad m => a -> m a
return FilePath
path

    probeNullEnv :: FilePath -> MaybeT IO FilePath
    probeNullEnv :: FilePath -> MaybeT IO FilePath
probeNullEnv FilePath
"-" = FilePath -> MaybeT IO FilePath
forall a. a -> MaybeT IO a
forall (m :: * -> *) a. Monad m => a -> m a
return FilePath
"-"
    probeNullEnv FilePath
_   = MaybeT IO FilePath
forall a. MaybeT IO a
forall (m :: * -> *) a. MonadPlus m => m a
mzero

    -- Various ways to define which environment to use

    getCmdLineArg :: MaybeT IO String
    getCmdLineArg :: MaybeT IO FilePath
getCmdLineArg = IO (Maybe FilePath) -> MaybeT IO FilePath
forall (m :: * -> *) a. m (Maybe a) -> MaybeT m a
MaybeT (IO (Maybe FilePath) -> MaybeT IO FilePath)
-> IO (Maybe FilePath) -> MaybeT IO FilePath
forall a b. (a -> b) -> a -> b
$ Maybe FilePath -> IO (Maybe FilePath)
forall a. a -> IO a
forall (m :: * -> *) a. Monad m => a -> m a
return (Maybe FilePath -> IO (Maybe FilePath))
-> Maybe FilePath -> IO (Maybe FilePath)
forall a b. (a -> b) -> a -> b
$ DynFlags -> Maybe FilePath
packageEnv DynFlags
dflags

    getEnvVar :: MaybeT IO String
    getEnvVar :: MaybeT IO FilePath
getEnvVar = do
      mvar <- IO (Either IOError FilePath) -> MaybeT IO (Either IOError FilePath)
forall (m :: * -> *) a. Monad m => m a -> MaybeT m a
liftMaybeT (IO (Either IOError FilePath)
 -> MaybeT IO (Either IOError FilePath))
-> IO (Either IOError FilePath)
-> MaybeT IO (Either IOError FilePath)
forall a b. (a -> b) -> a -> b
$ IO FilePath -> IO (Either IOError FilePath)
forall (m :: * -> *) e a.
(HasCallStack, MonadCatch m, Exception e) =>
m a -> m (Either e a)
MC.try (IO FilePath -> IO (Either IOError FilePath))
-> IO FilePath -> IO (Either IOError FilePath)
forall a b. (a -> b) -> a -> b
$ FilePath -> IO FilePath
getEnv FilePath
"GHC_ENVIRONMENT"
      case mvar of
        Right FilePath
var -> FilePath -> MaybeT IO FilePath
forall a. a -> MaybeT IO a
forall (m :: * -> *) a. Monad m => a -> m a
return FilePath
var
        Left IOError
err  -> if IOError -> Bool
isDoesNotExistError IOError
err then MaybeT IO FilePath
forall a. MaybeT IO a
forall (m :: * -> *) a. MonadPlus m => m a
mzero
                                                else IO FilePath -> MaybeT IO FilePath
forall (m :: * -> *) a. Monad m => m a -> MaybeT m a
liftMaybeT (IO FilePath -> MaybeT IO FilePath)
-> IO FilePath -> MaybeT IO FilePath
forall a b. (a -> b) -> a -> b
$ IOError -> IO FilePath
forall e a. (HasCallStack, Exception e) => e -> IO a
throwIO IOError
err

    notIfHideAllPackages :: MaybeT IO ()
    notIfHideAllPackages :: MaybeT IO ()
notIfHideAllPackages =
      Bool -> MaybeT IO ()
forall (f :: * -> *). Alternative f => Bool -> f ()
guard (Bool -> Bool
not (GeneralFlag -> DynFlags -> Bool
gopt GeneralFlag
Opt_HideAllPackages DynFlags
dflags))

    defaultEnvName :: String
    defaultEnvName :: FilePath
defaultEnvName = FilePath
"default"

    -- e.g. .ghc.environment.x86_64-linux-7.6.3
    localEnvFileName :: FilePath
    localEnvFileName :: FilePath
localEnvFileName = FilePath
".ghc.environment" FilePath -> FilePath -> FilePath
<.> ArchOS -> FilePath
versionedFilePath ArchOS
archOS

    -- Search for an env file, starting in the current dir and looking upwards.
    -- Fail if we get to the users home dir or the filesystem root. That is,
    -- we don't look for an env file in the user's home dir. The user-wide
    -- env lives in ghc's versionedAppDir/environments/default
    findLocalEnvFile :: MaybeT IO FilePath
    findLocalEnvFile :: MaybeT IO FilePath
findLocalEnvFile = do
        curdir  <- IO FilePath -> MaybeT IO FilePath
forall (m :: * -> *) a. Monad m => m a -> MaybeT m a
liftMaybeT IO FilePath
getCurrentDirectory
        homedir <- tryMaybeT getHomeDirectory
        let probe FilePath
dir | FilePath -> Bool
isDrive FilePath
dir Bool -> Bool -> Bool
|| FilePath
dir FilePath -> FilePath -> Bool
forall a. Eq a => a -> a -> Bool
== FilePath
homedir
                      = MaybeT IO FilePath
forall a. MaybeT IO a
forall (m :: * -> *) a. MonadPlus m => m a
mzero
            probe FilePath
dir = do
              let file :: FilePath
file = FilePath
dir FilePath -> FilePath -> FilePath
</> FilePath
localEnvFileName
              exists <- IO Bool -> MaybeT IO Bool
forall (m :: * -> *) a. Monad m => m a -> MaybeT m a
liftMaybeT (FilePath -> IO Bool
doesFileExist FilePath
file)
              if exists
                then return file
                else probe (takeDirectory dir)
        probe curdir

    -- Error reporting

    cmdLineError :: String -> MaybeT IO a
    cmdLineError :: forall a. FilePath -> MaybeT IO a
cmdLineError FilePath
env = IO a -> MaybeT IO a
forall (m :: * -> *) a. Monad m => m a -> MaybeT m a
liftMaybeT (IO a -> MaybeT IO a)
-> (FilePath -> IO a) -> FilePath -> MaybeT IO a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. GhcException -> IO a
forall a. GhcException -> IO a
throwGhcExceptionIO (GhcException -> IO a)
-> (FilePath -> GhcException) -> FilePath -> IO a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. FilePath -> GhcException
CmdLineError (FilePath -> MaybeT IO a) -> FilePath -> MaybeT IO a
forall a b. (a -> b) -> a -> b
$
      FilePath
"Package environment " FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath -> FilePath
forall a. Show a => a -> FilePath
show FilePath
env FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath
" not found"

    envError :: String -> MaybeT IO a
    envError :: forall a. FilePath -> MaybeT IO a
envError FilePath
env = IO a -> MaybeT IO a
forall (m :: * -> *) a. Monad m => m a -> MaybeT m a
liftMaybeT (IO a -> MaybeT IO a)
-> (FilePath -> IO a) -> FilePath -> MaybeT IO a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. GhcException -> IO a
forall a. GhcException -> IO a
throwGhcExceptionIO (GhcException -> IO a)
-> (FilePath -> GhcException) -> FilePath -> IO a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. FilePath -> GhcException
CmdLineError (FilePath -> MaybeT IO a) -> FilePath -> MaybeT IO a
forall a b. (a -> b) -> a -> b
$
         FilePath
"Package environment "
      FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath -> FilePath
forall a. Show a => a -> FilePath
show FilePath
env
      FilePath -> FilePath -> FilePath
forall a. [a] -> [a] -> [a]
++ FilePath
" (specified in GHC_ENVIRONMENT) not found"

-- | An error thrown if the GHC API is used in an incorrect fashion.
newtype GhcApiError = GhcApiError String

instance Show GhcApiError where
  show :: GhcApiError -> FilePath
show (GhcApiError FilePath
msg) = FilePath
msg

instance Exception GhcApiError

mkApiErr :: DynFlags -> SDoc -> GhcApiError
mkApiErr :: DynFlags -> SDoc -> GhcApiError
mkApiErr DynFlags
dflags SDoc
msg = FilePath -> GhcApiError
GhcApiError (DynFlags -> SDoc -> FilePath
showSDoc DynFlags
dflags SDoc
msg)


#if !defined(javascript_HOST_ARCH)
foreign import ccall unsafe "keepCAFsForGHCi"
    c_keepCAFsForGHCi   :: IO Bool
#endif