-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.81 2001/07/17 14:53:48 rrt Exp $
+-- $Id: InteractiveUI.hs,v 1.95 2001/10/16 14:44:51 simonmar Exp $
--
-- GHC Interactive User Interface
--
-----------------------------------------------------------------------------
{-# OPTIONS -#include "Linker.h" #-}
+{-# OPTIONS -#include "SchedAPI.h" #-}
module InteractiveUI ( interactiveUI, ghciWelcomeMsg ) where
#include "../includes/config.h"
import Packages
import CompManager
-import HscTypes ( GhciMode(..) )
+import HscTypes ( TyThing(..) )
+import MkIface
import ByteCodeLink
import DriverFlags
import DriverState
import Linker
import Finder ( flushPackageCache )
import Util
-import Name ( Name )
+import Id ( isRecordSelector, recordSelectorFieldLabel,
+ isDataConWrapId, idName )
+import Class ( className )
+import TyCon ( tyConName, tyConClass_maybe, isPrimTyCon )
+import FieldLabel ( fieldLabelTyCon )
+import SrcLoc ( isGoodSrcLoc )
+import Name ( Name, isHomePackageName, nameSrcLoc, nameOccName,
+ NamedThing(..) )
+import OccName ( isSymOcc )
+import BasicTypes ( defaultFixity )
import Outputable
import CmdLineOpts ( DynFlag(..), getDynFlags, saveDynFlags, restoreDynFlags, dopt_unset )
import Panic ( GhcException(..) )
#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
import Readline
#endif
+import Concurrent
import IOExts
import Numeric
("def", keepGoing defineMacro),
("help", keepGoing help),
("?", keepGoing help),
+ ("info", keepGoing info),
("load", keepGoing loadModule),
("module", keepGoing setContext),
("reload", keepGoing reloadModule),
helpText = "\
\ Commands available from the prompt:\n\
-\\
+\\
\ <stmt> evaluate/run <stmt>\n\
\ :add <filename> ... add module(s) to the current target set\n\
\ :cd <dir> change directory to <dir>\n\
\ :def <cmd> <expr> define a command :<cmd>\n\
\ :help, :? display this list of commands\n\
+\ :info [<name> ...] display information about the given names\n\
\ :load <filename> ... load module(s) and their dependents\n\
\ :module <mod> set the context for expression evaluation to <mod>\n\
\ :reload reload the current module set\n\
dflags <- getDynFlags
(cmstate, maybe_hval)
+ <- cmCompileExpr cmstate dflags "IO.hSetBuffering IO.stdout IO.NoBuffering >> IO.hSetBuffering IO.stderr IO.NoBuffering"
+ case maybe_hval of
+ Just hval -> unsafeCoerce# hval :: IO ()
+ _ -> panic "interactiveUI:buffering"
+
+ (cmstate, maybe_hval)
<- cmCompileExpr cmstate dflags "IO.hFlush PrelHandle.stderr"
case maybe_hval of
Just hval -> writeIORef flush_stderr (unsafeCoerce# hval :: IO ())
runGHCi :: GHCi ()
runGHCi = do
- -- Read in ./.ghci.
- let file = "./.ghci"
- exists <- io (doesFileExist file)
- when exists $ do
- dir_ok <- io (checkPerms ".")
- file_ok <- io (checkPerms file)
- when (dir_ok && file_ok) $ do
- either_hdl <- io (IO.try (openFile "./.ghci" ReadMode))
- case either_hdl of
- Left e -> return ()
- Right hdl -> fileLoop hdl False
-
- -- Read in $HOME/.ghci
- either_dir <- io (IO.try (getEnv "HOME"))
- case either_dir of
- Left e -> return ()
- Right dir -> do
- cwd <- io (getCurrentDirectory)
- when (dir /= cwd) $ do
- let file = dir ++ "/.ghci"
- ok <- io (checkPerms file)
- either_hdl <- io (IO.try (openFile file ReadMode))
- case either_hdl of
- Left e -> return ()
- Right hdl -> fileLoop hdl False
+ read_dot_files <- io (readIORef v_Read_DotGHCi)
+
+ when (read_dot_files) $ do
+ -- Read in ./.ghci.
+ let file = "./.ghci"
+ exists <- io (doesFileExist file)
+ when exists $ do
+ dir_ok <- io (checkPerms ".")
+ file_ok <- io (checkPerms file)
+ when (dir_ok && file_ok) $ do
+ either_hdl <- io (IO.try (openFile "./.ghci" ReadMode))
+ case either_hdl of
+ Left e -> return ()
+ Right hdl -> fileLoop hdl False
+
+ when (read_dot_files) $ do
+ -- Read in $HOME/.ghci
+ either_dir <- io (IO.try (getEnv "HOME"))
+ case either_dir of
+ Left e -> return ()
+ Right dir -> do
+ cwd <- io (getCurrentDirectory)
+ when (dir /= cwd) $ do
+ let file = dir ++ "/.ghci"
+ ok <- io (checkPerms file)
+ when ok $ do
+ either_hdl <- io (IO.try (openFile file ReadMode))
+ case either_hdl of
+ Left e -> return ()
+ Right hdl -> fileLoop hdl False
+
+ interactiveLoop
+
+ -- and finally, exit
+ io $ do putStrLn "Leaving GHCi."
+
+interactiveLoop = do
+ -- ignore ^C exceptions caught here
+ ghciHandleDyn (\e -> case e of Interrupted -> ghciUnblock interactiveLoop
+ _other -> return ()) $ do
-- read commands from stdin
#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
readlineLoop
fileLoop stdin True
#endif
- -- and finally, exit
- io $ do putStrLn "Leaving GHCi."
-
-- NOTE: We only read .ghci files if they are owned by the current user,
-- and aren't world writable. Otherwise, we could be accidentally
-- running code planted by a malicious third party.
--- Furthermore, We only read ./.ghci if both . and ./.ghci are
--- owned by the current user and aren't writable by anyone else. I
--- think this is sufficient: we don't need to check .. and
--- ../.. etc. because "." always refers to the same directory while a
--- process is running.
+-- Furthermore, We only read ./.ghci if . is owned by the current user
+-- and isn't writable by anyone else. I think this is sufficient: we
+-- don't need to check .. and ../.. etc. because "." always refers to
+-- the same directory while a process is running.
checkPerms :: String -> IO Bool
checkPerms name =
readlineLoop = do
st <- getGHCiState
mod <- io (cmGetContext (cmstate st))
+ io yield
l <- io (readline (mod ++ "> "))
case l of
Nothing -> return ()
help :: String -> GHCi ()
help _ = io (putStr helpText)
+info :: String -> GHCi ()
+info "" = throwDyn (CmdLineError "syntax: `:i <thing-you-want-info-about>'")
+info s = do
+ let names = words s
+ state <- getGHCiState
+ dflags <- io getDynFlags
+ let
+ infoThings cms [] = return cms
+ infoThings cms (name:names) = do
+ (cms, unqual, stuff) <- io (cmInfoThing cms dflags name)
+ io (putStrLn (showSDocForUser unqual (
+ vcat (intersperse (text "") (map showThing stuff))))
+ )
+ infoThings cms names
+
+ showThing (ty_thing, fixity)
+ = vcat [ text "-- " <> showTyThing ty_thing,
+ showFixity fixity (getName ty_thing),
+ ppr (ifaceTyThing ty_thing) ]
+
+ showFixity fix name
+ | fix == defaultFixity = empty
+ | otherwise = ppr fix <+>
+ (if isSymOcc (nameOccName name)
+ then ppr name
+ else char '`' <> ppr name <> char '`')
+
+ showTyThing (AClass cl)
+ = hcat [ppr cl, text " is a class", showSrcLoc (className cl)]
+ showTyThing (ATyCon ty)
+ | isPrimTyCon ty
+ = hcat [ppr ty, text " is a primitive type constructor"]
+ | otherwise
+ = hcat [ppr ty, text " is a type constructor", showSrcLoc (tyConName ty)]
+ showTyThing (AnId id)
+ = hcat [ppr id, text " is a ", idDescr id, showSrcLoc (idName id)]
+
+ idDescr id
+ | isRecordSelector id =
+ case tyConClass_maybe (fieldLabelTyCon (
+ recordSelectorFieldLabel id)) of
+ Nothing -> text "record selector"
+ Just c -> text "method in class " <> ppr c
+ | isDataConWrapId id = text "data constructor"
+ | otherwise = text "variable"
+
+ -- also print out the source location for home things
+ showSrcLoc name
+ | isHomePackageName name && isGoodSrcLoc loc
+ = hsep [ text ", defined at", ppr loc ]
+ | otherwise
+ = empty
+ where loc = nameSrcLoc name
+
+ cms <- infoThings (cmstate state) names
+ setGHCiState state{ cmstate = cms }
+ return ()
+
+
addModule :: String -> GHCi ()
addModule str = do
let files = words str
flushPackageCache pkgs
new_pkg_info <- getPackageDetails new_pkgs
- mapM_ (linkPackage False) (reverse new_pkg_info)
+ mapM_ linkPackage (reverse new_pkg_info)
-----------------------------------------------------------------------------
-- GHCi monad
(GHCi m) >>= k = GHCi $ \s -> m s >>= \a -> unGHCi (k a) s
return a = GHCi $ \s -> return a
+ghciHandleDyn :: Typeable t => (t -> GHCi a) -> GHCi a -> GHCi a
+ghciHandleDyn h (GHCi m) = GHCi $ \s ->
+ Exception.catchDyn (m s) (\e -> unGHCi (h e) s)
+
getGHCiState = GHCi $ \r -> readIORef r
setGHCiState s = GHCi $ \r -> writeIORef r s
= do st <- getGHCiState
setGHCiState (st{ options = filter (/= opt) (options st) })
-io m = GHCi $ \s -> m >>= \a -> return a
+io :: IO a -> GHCi a
+io m = GHCi { unGHCi = \s -> m >>= return }
-----------------------------------------------------------------------------
-- recursive exception handlers
linkPackages :: [LibrarySpec] -> [PackageConfig] -> IO ()
linkPackages cmdline_lib_specs pkgs
- = do sequence_ [ linkPackage (name p `elem` loaded) p | p <- reverse pkgs ]
+ = do mapM_ linkPackage (reverse pkgs)
lib_paths <- readIORef v_Library_paths
mapM_ (preloadLib lib_paths) cmdline_lib_specs
+ if (null cmdline_lib_specs)
+ then return ()
+ else do putStr "final link ... "
+ ok <- resolveObjs
+ if ok then putStrLn "done."
+ else throwDyn (InstallationError "linking extra libraries/objects failed")
where
- -- Packages that are already linked into GHCi. For mingw32, we only
- -- skip gmp and rts, since std and after need to load the msvcrt.dll
- -- library which std depends on.
- loaded
-# ifndef mingw32_TARGET_OS
- = [ "gmp", "rts", "std", "concurrent", "posix", "text", "util" ]
-# else
- = [ "gmp", "rts" ]
-# endif
-
preloadLib :: [String] -> LibrarySpec -> IO ()
preloadLib lib_paths lib_spec
= do putStr ("Loading object " ++ showLS lib_spec ++ " ... ")
case lib_spec of
Left static_ish
-> do b <- preload_static lib_paths static_ish
- putStrLn (if b then "done" else "not found")
+ putStrLn (if b then "done." else "not found")
Right dll_unadorned
-> -- We add "" to the set of paths to try, so that
-- if none of the real paths match, we force addDLL
= (throwDyn . CmdLineError)
"user specified .o/.so/.DLL could not be loaded."
+-- Packages that are already linked into GHCi. For mingw32, we only
+-- skip gmp and rts, since std and after need to load the msvcrt.dll
+-- library which std depends on.
+loaded_in_ghci
+# ifndef mingw32_TARGET_OS
+ = [ "gmp", "rts", "std", "concurrent", "posix", "text", "util" ]
+# else
+ = [ "gmp", "rts" ]
+# endif
-linkPackage :: Bool -> PackageConfig -> IO ()
--- ignore rts and gmp for now (ToDo; better?)
-linkPackage loaded_in_ghci pkg
- | name pkg `elem` ["rts", "gmp"]
- = return ()
- | otherwise
- = do putStr ("Loading package " ++ name pkg ++ " ... ")
+linkPackage :: PackageConfig -> IO ()
+linkPackage pkg
+ = do
-- For each obj, try obj.o and if that fails, obj.so.
-- Complication: all the .so's must be loaded before any of the .o's.
let dirs = library_dirs pkg
-- Don't load the .so libs if this is a package GHCi is already
-- linked against, because we'll already have the .so linked in.
let (so_libs, obj_libs) = partition isRight classifieds
- let sos_first | loaded_in_ghci = obj_libs
- | otherwise = so_libs ++ obj_libs
+ let sos_first | name pkg `elem` loaded_in_ghci = obj_libs
+ | otherwise = so_libs ++ obj_libs
+
+ -- nothing to do?
+ if null sos_first then return () else do
+ putStr ("Loading package " ++ name pkg ++ " ... ")
mapM loadClassified sos_first
putStr "linking ... "
- resolveObjs
- putStrLn "done."
+ ok <- resolveObjs
+ if ok then putStrLn "done."
+ else panic ("can't load package `" ++ name pkg ++ "'")
where
isRight (Right _) = True
isRight (Left _) = False
projects / ghc-hetmet.git / blobdiff