-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.66 2001/05/04 16:36:38 simonmar Exp $
+-- $Id: InteractiveUI.hs,v 1.90 2001/08/16 10:54:22 simonmar Exp $
--
-- GHC Interactive User Interface
--
-----------------------------------------------------------------------------
{-# OPTIONS -#include "Linker.h" #-}
+{-# OPTIONS -#include "SchedAPI.h" #-}
module InteractiveUI ( interactiveUI, ghciWelcomeMsg ) where
#include "../includes/config.h"
#include "HsVersions.h"
+import Packages
import CompManager
-import CmStaticInfo
+import HscTypes ( GhciMode(..), TyThing(..) )
+import MkIface ( ifaceTyCls )
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 )
+import FieldLabel ( fieldLabelTyCon )
+import SrcLoc ( isGoodSrcLoc )
+import Name ( Name, isHomePackageName, nameSrcLoc, NamedThing(..) )
+import BasicTypes ( defaultFixity )
import Outputable
-import CmdLineOpts ( DynFlag(..), dopt_unset )
+import CmdLineOpts ( DynFlag(..), getDynFlags, saveDynFlags, restoreDynFlags, dopt_unset )
import Panic ( GhcException(..) )
import Config
+#ifndef mingw32_TARGET_OS
import Posix
+#endif
+
import Exception
import Dynamic
#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
ghciWelcomeMsg = "\
\ ___ ___ _\n\
\ / _ \\ /\\ /\\/ __(_)\n\
-\ / /_\\// /_/ / / | | GHC Interactive, version " ++ cProjectVersion ++ ", For Haskell 98.\n\
+\ / /_\\// /_/ / / | | GHC Interactive, version " ++ cProjectVersion ++ ", for Haskell 98.\n\
\/ /_\\\\/ __ / /___| | http://www.haskell.org/ghc/\n\
\\\____/\\/ /_/\\____/|_| Type :? for help.\n"
("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\
-\ :cd <dir> change directory to <dir>\n\
-\ :def <cmd> <expr> define a command :<cmd>\n\
-\ :help, :? display this list of commands\n\
-\ :load <filename> load a module (and it dependents)\n\
-\ :module <mod> set the context for expression evaluation to <mod>\n\
-\ :reload reload the current module set\n\
-\ :set <option> ... set options\n\
-\ :undef <name> undefine user-defined command :<name>\n\
-\ :type <expr> show the type of <expr>\n\
-\ :unset <option> ... unset options\n\
-\ :quit exit GHCi\n\
-\ :!<command> run the shell command <command>\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\
+\ :set <option> ... set options\n\
+\ :undef <cmd> undefine user-defined command :<cmd>\n\
+\ :type <expr> show the type of <expr>\n\
+\ :unset <option> ... unset options\n\
+\ :quit exit GHCi\n\
+\ :!<command> run the shell command <command>\n\
\\
\ Options for `:set' and `:unset':\n\
\\
\ -<flags> most GHC command line flags can also be set here\n\
\ (eg. -v2, -fglasgow-exts, etc.)\n\
\"
- --ToDo :add <filename> add a module to the current set\n\
-interactiveUI :: CmState -> Maybe FilePath -> [LibrarySpec] -> IO ()
-interactiveUI cmstate mod cmdline_libs = do
+interactiveUI :: CmState -> [FilePath] -> [LibrarySpec] -> IO ()
+interactiveUI cmstate paths cmdline_libs = do
hFlush stdout
hSetBuffering stdout NoBuffering
linkPackages cmdline_libs pkgs
(cmstate, ok, mods) <-
- case mod of
- Nothing -> return (cmstate, True, [])
- Just m -> cmLoadModule cmstate m
+ case paths of
+ [] -> return (cmstate, True, [])
+ _ -> cmLoadModule cmstate paths
#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
Readline.initialize
Just hval -> writeIORef flush_stdout (unsafeCoerce# hval :: IO ())
_ -> panic "interactiveUI:stdout"
- (unGHCi runGHCi) GHCiState{ target = mod,
- cmstate = cmstate,
- options = [] }
+ startGHCi runGHCi GHCiState{ targets = paths,
+ cmstate = cmstate,
+ options = [] }
+
+#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+ Readline.resetTerminal Nothing
+#endif
+
return ()
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
-- read commands from stdin
#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
-- 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 =
handle (\_ -> return False) $ do
+#ifdef mingw32_TARGET_OS
+ doesFileExist name
+#else
st <- getFileStatus name
me <- getRealUserID
if fileOwner st /= me then do
" is writable by someone else, IGNORING!"
return False
else return True
+#endif
fileLoop :: Handle -> Bool -> GHCi ()
fileLoop hdl prompt = do
-- and carries on.
runCommand :: String -> GHCi Bool
runCommand c =
- ghciHandle ( \exception ->
- (case exception of
- DynException dyn ->
- case fromDynamic dyn of
- Nothing -> io (putStrLn ("*** Exception: (unknown)"))
- Just ghc_ex ->
- case ghc_ex of
- PhaseFailed phase code ->
- io ( putStrLn ("Phase " ++ phase ++ " failed (code "
- ++ show code ++ ")"))
- Interrupted -> io (putStrLn "Interrupted.")
- -- omit the location for CmdLineError
- CmdLineError s -> io (putStrLn s)
- other -> io (putStrLn (show (ghc_ex :: GhcException)))
-
- other -> io (putStrLn ("*** Exception: " ++ show exception))
-
- ) >> return False
- ) $
-
- doCommand c
+ ghciHandle ( \exception -> do
+ flushEverything
+ showException exception
+ return False
+ ) $
+ doCommand c
+
+showException (DynException dyn) =
+ case fromDynamic dyn of
+ Nothing ->
+ io (putStrLn ("*** Exception: (unknown)"))
+ Just (PhaseFailed phase code) ->
+ io (putStrLn ("Phase " ++ phase ++ " failed (code "
+ ++ show code ++ ")"))
+ Just Interrupted ->
+ io (putStrLn "Interrupted.")
+ Just (CmdLineError s) ->
+ io (putStrLn s) -- omit the location for CmdLineError
+ Just other_ghc_ex ->
+ io (putStrLn (show other_ghc_ex))
+showException other_exception
+ = io (putStrLn ("*** Exception: " ++ show other_exception))
doCommand (':' : command) = specialCommand command
doCommand stmt
= return Nothing
| otherwise
= do st <- getGHCiState
- dflags <- io (getDynFlags)
+ dflags <- io getDynFlags
let dflags' = dopt_unset dflags Opt_WarnUnusedBinds
(new_cmstate, names) <- io (cmRunStmt (cmstate st) dflags' stmt)
setGHCiState st{cmstate = new_cmstate}
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 (ifaceTyCls ty_thing) ]
+
+ showFixity fix name
+ | fix == defaultFixity = empty
+ | otherwise = ppr fix <+> ppr name
+
+ showTyThing (AClass cl)
+ = hcat [ppr cl, text " is a class", showSrcLoc (className cl)]
+ showTyThing (ATyCon ty)
+ = 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 _ = throwDyn (InstallationError ":add not implemented")
+addModule str = do
+ let files = words str
+ state <- getGHCiState
+ dflags <- io (getDynFlags)
+ io (revertCAFs) -- always revert CAFs on load/add.
+ let new_targets = files ++ targets state
+ (cmstate1, ok, mods) <- io (cmLoadModule (cmstate state) new_targets)
+ setGHCiState state{ cmstate = cmstate1, targets = new_targets }
+ modulesLoadedMsg ok mods
setContext :: String -> GHCi ()
setContext ""
= throwDyn (CmdLineError "syntax: `:m <module>'")
-setContext m | not (isUpper (head m)) || not (all isAlphaNum (tail m))
+setContext m | not (isUpper (head m)) || not (all isAlphaNumEx (tail m))
= throwDyn (CmdLineError ("strange looking module name: `" ++ m ++ "'"))
+ where
+ isAlphaNumEx c = isAlphaNum c || c == '_'
setContext str
= do st <- getGHCiState
new_cmstate <- io (cmSetContext (cmstate st) str)
-- compile the expression
st <- getGHCiState
- dflags <- io (getDynFlags)
+ dflags <- io getDynFlags
(new_cmstate, maybe_hv) <- io (cmCompileExpr (cmstate st) dflags new_expr)
setGHCiState st{cmstate = new_cmstate}
case maybe_hv of
io (writeIORef commands (filter ((/= macro_name) . fst) cmds))
loadModule :: String -> GHCi ()
-loadModule path = timeIt (loadModule' path)
+loadModule str = timeIt (loadModule' str)
-loadModule' path = do
+loadModule' str = do
+ let files = words str
state <- getGHCiState
- dflags <- io (getDynFlags)
+ dflags <- io getDynFlags
cmstate1 <- io (cmUnload (cmstate state) dflags)
+ setGHCiState state{ cmstate = cmstate1, targets = [] }
io (revertCAFs) -- always revert CAFs on load.
- (cmstate2, ok, mods) <- io (cmLoadModule cmstate1 path)
- let new_state = state{ cmstate = cmstate2,
- target = Just path
- }
- setGHCiState new_state
+ (cmstate2, ok, mods) <- io (cmLoadModule cmstate1 files)
+ setGHCiState state{ cmstate = cmstate2, targets = files }
modulesLoadedMsg ok mods
reloadModule :: String -> GHCi ()
reloadModule "" = do
state <- getGHCiState
- case target state of
- Nothing -> io (putStr "no current target\n")
- Just path
+ case targets state of
+ [] -> io (putStr "no current target\n")
+ paths
-> do io (revertCAFs) -- always revert CAFs on reload.
- (new_cmstate, ok, mods) <- io (cmLoadModule (cmstate state) path)
+ (new_cmstate, ok, mods) <- io (cmLoadModule (cmstate state) paths)
setGHCiState state{ cmstate=new_cmstate }
modulesLoadedMsg ok mods
typeOfExpr :: String -> GHCi ()
typeOfExpr str
= do st <- getGHCiState
- dflags <- io (getDynFlags)
+ dflags <- io getDynFlags
(new_cmstate, maybe_tystr) <- io (cmTypeOfExpr (cmstate st) dflags str)
setGHCiState st{cmstate = new_cmstate}
case maybe_tystr of
-- then, dynamic flags
io $ do
- dyn_flags <- readIORef v_InitDynFlags
- writeIORef v_DynFlags dyn_flags
+ restoreDynFlags
leftovers <- processArgs dynamic_flags leftovers []
- dyn_flags <- readIORef v_DynFlags
- writeIORef v_InitDynFlags dyn_flags
+ saveDynFlags
if (not (null leftovers))
then throwDyn (CmdLineError ("unrecognised flags: " ++
newPackages new_pkgs = do
state <- getGHCiState
- dflags <- io (getDynFlags)
+ dflags <- io getDynFlags
cmstate1 <- io (cmUnload (cmstate state) dflags)
- setGHCiState state{ cmstate = cmstate1, target = Nothing }
+ setGHCiState state{ cmstate = cmstate1, targets = [] }
io $ do
pkgs <- getPackageInfo
data GHCiState = GHCiState
{
- target :: Maybe FilePath,
+ targets :: [FilePath],
cmstate :: CmState,
options :: [GHCiOption]
}
GLOBAL_VAR(flush_stdout, error "no flush_stdout", IO ())
GLOBAL_VAR(flush_stderr, error "no flush_stdout", IO ())
-newtype GHCi a = GHCi { unGHCi :: GHCiState -> IO (GHCiState, a) }
+newtype GHCi a = GHCi { unGHCi :: IORef GHCiState -> IO a }
+
+startGHCi :: GHCi a -> GHCiState -> IO a
+startGHCi g state = do ref <- newIORef state; unGHCi g ref
instance Monad GHCi where
- (GHCi m) >>= k = GHCi $ \s -> m s >>= \(s,a) -> unGHCi (k a) s
- return a = GHCi $ \s -> return (s,a)
+ (GHCi m) >>= k = GHCi $ \s -> m s >>= \a -> unGHCi (k a) s
+ return a = GHCi $ \s -> return a
-getGHCiState = GHCi $ \s -> return (s,s)
-setGHCiState s = GHCi $ \_ -> return (s,())
+getGHCiState = GHCi $ \r -> readIORef r
+setGHCiState s = GHCi $ \r -> writeIORef r s
isOptionSet :: GHCiOption -> GHCi Bool
isOptionSet opt
= do st <- getGHCiState
setGHCiState (st{ options = filter (/= opt) (options st) })
-io m = GHCi $ \s -> m >>= \a -> return (s,a)
+io :: IO a -> GHCi a
+io m = GHCi { unGHCi = \s -> m >>= return }
-----------------------------------------------------------------------------
-- recursive exception handlers
-- e.g. On unix "qt" denotes "libqt.so"
-- On WinDoze "burble" denotes "burble.DLL"
-- addDLL is platform-specific and adds the lib/.so/.DLL
--- prefixes plaform-dependently; we don't do that here.
+-- suffixes platform-dependently; we don't do that here.
+--
+-- For dynamic objects only, try to find the object file in all the
+-- directories specified in v_Library_Paths before giving up.
+
type LibrarySpec
= Either FilePath String
linkPackages :: [LibrarySpec] -> [PackageConfig] -> IO ()
linkPackages cmdline_lib_specs pkgs
= do sequence_ [ linkPackage (name p `elem` loaded) p | p <- reverse pkgs ]
- mapM_ preloadLib cmdline_lib_specs
+ 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
- loaded = [ "concurrent", "posix", "text", "util" ]
-
- preloadLib lib_spec
+ -- 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 <- doesFileExist static_ish
- if not b
- then do putStr "not found.\n"
- croak
- else do loadObj static_ish
- putStr "done.\n"
+ -> do b <- preload_static lib_paths static_ish
+ putStrLn (if b then "done." else "not found")
Right dll_unadorned
- -> do maybe_errmsg <- addDLL dll_unadorned
- if maybe_errmsg == nullPtr
- then putStr "done.\n"
- else do str <- peekCString maybe_errmsg
- putStr ("failed (" ++ str ++ ")\n")
- croak
-
- croak = throwDyn (CmdLineError "user specified .o/.so/.DLL could not be loaded.")
+ -> -- We add "" to the set of paths to try, so that
+ -- if none of the real paths match, we force addDLL
+ -- to look in the default dynamic-link search paths.
+ do b <- preload_dynamic (lib_paths++[""]) dll_unadorned
+ when (not b) (cantFind lib_paths lib_spec)
+ putStrLn "done"
+
+ cantFind :: [String] -> LibrarySpec -> IO ()
+ cantFind paths spec
+ = do putStr ("failed.\nCan't find " ++ showLS spec
+ ++ " in directories:\n"
+ ++ unlines (map (" "++) paths) )
+ give_up
+
+ -- not interested in the paths in the static case.
+ preload_static paths name
+ = do b <- doesFileExist name
+ if not b then return False
+ else loadObj name >> return True
+
+ preload_dynamic [] name
+ = return False
+ preload_dynamic (path:paths) rootname
+ = do maybe_errmsg <- addDLL path rootname
+ if maybe_errmsg /= nullPtr
+ then preload_dynamic paths rootname
+ else return True
+
+ give_up
+ = (throwDyn . CmdLineError)
+ "user specified .o/.so/.DLL could not be loaded."
linkPackage :: Bool -> PackageConfig -> IO ()
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
loadClassified (Left obj_absolute_filename)
= do loadObj obj_absolute_filename
loadClassified (Right dll_unadorned)
- = do maybe_errmsg <- addDLL dll_unadorned
+ = do maybe_errmsg <- addDLL "" dll_unadorned -- doesn't seem right to me
if maybe_errmsg == nullPtr
then return ()
else do str <- peekCString maybe_errmsg
- throwDyn (CmdLineError ("can't find .o or .so/.DLL for: "
+ throwDyn (CmdLineError ("can't load .so/.DLL for: "
++ dll_unadorned ++ " (" ++ str ++ ")" ))
locateOneObj :: [FilePath] -> String -> IO LibrarySpec
projects / ghc-hetmet.git / blobdiff