-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.78 2001/06/27 11:17:47 simonmar Exp $
+-- $Id: InteractiveUI.hs,v 1.87 2001/08/15 14:41:49 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 ( GhciMode(..), TyThing(..) )
+import MkIface ( ifaceTyCls )
import ByteCodeLink
import DriverFlags
import DriverState
import Linker
import Finder ( flushPackageCache )
import Util
-import Name ( Name )
+import Id ( isDataConWrapId, idName )
+import Class ( className )
+import TyCon ( tyConName )
+import SrcLoc ( isGoodSrcLoc )
+import Name ( Name, isHomePackageName, nameSrcLoc )
import Outputable
import CmdLineOpts ( DynFlag(..), getDynFlags, saveDynFlags, restoreDynFlags, dopt_unset )
import Panic ( GhcException(..) )
("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\
-\ :load <filename> load a module (and its dependents)\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\
\ -<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 -> [FilePath] -> [LibrarySpec] -> IO ()
interactiveUI cmstate paths cmdline_libs = do
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 =
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, ty_things) <- io (cmInfoThing cms dflags name)
+ io (putStrLn (showSDocForUser unqual (
+ vcat (intersperse (text "") (map showThing ty_things))))
+ )
+ infoThings cms names
+
+ showThing ty_thing = vcat [ text "-- " <> showTyThing ty_thing,
+ ppr (ifaceTyCls ty_thing) ]
+
+ 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)
+ | isDataConWrapId id
+ = hcat [ppr id, text " is a data constructor", showSrcLoc (idName id)]
+ | otherwise
+ = hcat [ppr id, text " is a variable", showSrcLoc (idName id)]
+
+ -- 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 path = do
+addModule str = do
+ let files = words str
state <- getGHCiState
dflags <- io (getDynFlags)
io (revertCAFs) -- always revert CAFs on load/add.
- let new_targets = path : targets state
+ 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
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
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])
- setGHCiState state{ cmstate = cmstate2, targets = [path] }
+ (cmstate2, ok, mods) <- io (cmLoadModule cmstate1 files)
+ setGHCiState state{ cmstate = cmstate2, targets = files }
modulesLoadedMsg ok mods
reloadModule :: String -> GHCi ()
= 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
= do sequence_ [ linkPackage (name p `elem` loaded) p | p <- 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
- loaded = [ "gmp", "rts", "std", "concurrent", "posix", "text", "util" ]
+ -- 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
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
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