X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fghci%2FInteractiveUI.hs;h=9d6f6a17d9e7df8ec2a8b9afaba1c9b385226ba8;hb=2ba5597f143dd581027ac4903b49d8cdd1cc25f2;hp=2bf39b5e89c5fe5dbf298beb5ce99186e3a509fc;hpb=16d5d1c75c999677783c9c1bda519540fa9a6e58;p=ghc-hetmet.git

diff --git a/ghc/compiler/ghci/InteractiveUI.hs b/ghc/compiler/ghci/InteractiveUI.hs
index 2bf39b5..9d6f6a1 100644
--- a/ghc/compiler/ghci/InteractiveUI.hs
+++ b/ghc/compiler/ghci/InteractiveUI.hs
@@ -1,5 +1,5 @@
 -----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.74 2001/06/14 12:50:06 simonpj Exp $
+-- $Id: InteractiveUI.hs,v 1.87 2001/08/15 14:41:49 simonmar Exp $
 --
 -- GHC Interactive User Interface
 --
@@ -8,13 +8,16 @@
 -----------------------------------------------------------------------------
 
 {-# 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
@@ -22,7 +25,11 @@ import DriverUtil
 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(..) )
@@ -70,6 +77,7 @@ builtin_commands = [
   ("def",	keepGoing defineMacro),
   ("help",	keepGoing help),
   ("?",		keepGoing help),
+  ("info",      keepGoing info),
   ("load",	keepGoing loadModule),
   ("module",	keepGoing setContext),
   ("reload",	keepGoing reloadModule),
@@ -87,12 +95,14 @@ shortHelpText = "use :? for help.\n"
 
 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\ 
@@ -110,10 +120,9 @@ helpText = "\
 \    -<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
 
@@ -123,9 +132,9 @@ interactiveUI cmstate mod cmdline_libs = do
    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
@@ -145,39 +154,49 @@ interactiveUI cmstate mod cmdline_libs = do
 	Just hval -> writeIORef flush_stdout (unsafeCoerce# hval :: IO ())
 	_ -> panic "interactiveUI:stdout"
 
-   startGHCi runGHCi GHCiState{ target = mod,
+   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
@@ -194,11 +213,10 @@ runGHCi = do
 -- 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 =
@@ -267,27 +285,28 @@ readlineLoop = 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
@@ -357,8 +376,57 @@ noArgs c = throwDyn (CmdLineError ("command `" ++ c ++ "' takes no arguments"))
 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 _ = 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 ""
@@ -423,26 +491,27 @@ undefineMacro macro_name = do
   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, target = Nothing }
+  setGHCiState state{ cmstate = cmstate1, targets = [] }
   io (revertCAFs)			-- always revert CAFs on load.
-  (cmstate2, ok, mods) <- io (cmLoadModule cmstate1 path)
-  setGHCiState state{ cmstate = cmstate2, target = Just path }
+  (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
 
@@ -572,7 +641,7 @@ newPackages new_pkgs = do
   state <- getGHCiState
   dflags <- io getDynFlags
   cmstate1 <- io (cmUnload (cmstate state) dflags)
-  setGHCiState state{ cmstate = cmstate1, target = Nothing }
+  setGHCiState state{ cmstate = cmstate1, targets = [] }
 
   io $ do
     pkgs <- getPackageInfo
@@ -586,7 +655,7 @@ newPackages new_pkgs = do
 
 data GHCiState = GHCiState
      { 
-	target         :: Maybe FilePath,
+	targets        :: [FilePath],
 	cmstate        :: CmState,
 	options        :: [GHCiOption]
      }
@@ -627,7 +696,8 @@ unsetOption opt
  = 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
@@ -668,9 +738,22 @@ linkPackages cmdline_lib_specs pkgs
    = 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 = [ "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
@@ -678,7 +761,7 @@ linkPackages cmdline_lib_specs pkgs
                 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
@@ -734,8 +817,9 @@ linkPackage loaded_in_ghci 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
@@ -748,7 +832,7 @@ loadClassified (Right dll_unadorned)
         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