-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.45 2001/02/13 13:09:36 sewardj Exp $
+-- $Id: InteractiveUI.hs,v 1.58 2001/03/27 16:55:03 simonmar Exp $
--
-- GHC Interactive User Interface
--
-----------------------------------------------------------------------------
{-# OPTIONS -#include "Linker.h" #-}
-module InteractiveUI (interactiveUI) where
+module InteractiveUI ( interactiveUI, ghciWelcomeMsg ) where
#include "HsVersions.h"
import DriverFlags
import DriverState
import DriverUtil
-import Type
import Linker
-import Finder
-import Module
-import Outputable
import Util
-import PprType {- instance Outputable Type; do not delete -}
+import Name ( Name )
+import Outputable
+import CmdLineOpts ( DynFlag(..), dopt_unset )
import Panic ( GhcException(..) )
import Config
import Monad ( when )
import PrelGHC ( unsafeCoerce# )
-import PrelPack ( packString )
-import PrelByteArr
-import Foreign ( Ptr, nullPtr )
+import Foreign ( nullPtr )
+import CString ( peekCString )
-----------------------------------------------------------------------------
helpText = "\
\ Commands available from the prompt:\n\
\\
-\ <expr> evaluate <expr>\n\
-\ :add <filename> add a module to the current set\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\
-\ :unset <option> ... unset 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\
\\
\ Options for `:set' and `:unset':\n\
\\
+\ +r revert top-level expressions after each evaluation\n\
\ +s print timing/memory stats after each evaluation\n\
\ +t print type after evaluation\n\
-\ +r revert top-level expressions after each evaluation\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 -> IO ()
-interactiveUI cmstate mod = do
- hPutStrLn stdout ghciWelcomeMsg
+interactiveUI :: CmState -> Maybe FilePath -> [LibrarySpec] -> IO ()
+interactiveUI cmstate mod cmdline_libs = do
hFlush stdout
hSetBuffering stdout NoBuffering
-- link in the available packages
pkgs <- getPackageInfo
initLinker
- linkPackages (reverse pkgs)
+ linkPackages cmdline_libs (reverse pkgs)
(cmstate, ok, mods) <-
case mod of
Readline.initialize
#endif
- prel <- moduleNameToModule defaultCurrentModuleName
- writeIORef defaultCurrentModule prel
-
dflags <- getDynFlags
- (cmstate, maybe_stuff) <- cmGetExpr cmstate dflags False prel
- "PrelHandle.hFlush PrelHandle.stdout"
- case maybe_stuff of
- Nothing -> return ()
- Just (hv,_,_) -> writeIORef flush_stdout hv
-
- (cmstate, maybe_stuff) <- cmGetExpr cmstate dflags False prel
- "PrelHandle.hFlush PrelHandle.stdout"
- case maybe_stuff of
- Nothing -> return ()
- Just (hv,_,_) -> writeIORef flush_stderr hv
-
- let this_mod = case mods of
- [] -> prel
- m:ms -> m
-
- (unGHCi runGHCi) GHCiState{ modules = mods,
- current_module = this_mod,
- target = mod,
- cmstate = cmstate,
- options = [ShowTiming],
- last_expr = Nothing}
+ (cmstate, maybe_hval)
+ <- cmCompileExpr cmstate dflags "IO.hFlush PrelHandle.stderr"
+ case maybe_hval of
+ Just hval -> writeIORef flush_stderr (unsafeCoerce# hval :: IO ())
+ _ -> panic "interactiveUI:stderr"
+
+ (cmstate, maybe_hval)
+ <- cmCompileExpr cmstate dflags "IO.hFlush PrelHandle.stdout"
+ case maybe_hval of
+ Just hval -> writeIORef flush_stdout (unsafeCoerce# hval :: IO ())
+ _ -> panic "interactiveUI:stdout"
+
+ (unGHCi runGHCi) GHCiState{ target = mod,
+ cmstate = cmstate,
+ options = [ShowTiming] }
return ()
case home of
Left e -> return ()
Right dir -> do
- dot_ghci <- io (IO.try (openFile (dir ++ "/.ghci") ReadMode))
- case dot_ghci of
- Left e -> return ()
- Right hdl -> fileLoop hdl False
+ cwd <- io (getCurrentDirectory)
+ when (dir /= cwd) $ do
+ dot_ghci <- io (IO.try (openFile (dir ++ "/.ghci") ReadMode))
+ case dot_ghci of
+ Left e -> return ()
+ Right hdl -> fileLoop hdl False
-- read commands from stdin
#ifndef NO_READLINE
fileLoop :: Handle -> Bool -> GHCi ()
fileLoop hdl prompt = do
st <- getGHCiState
- when prompt (io (hPutStr hdl (moduleUserString (current_module st) ++ "> ")))
+ mod <- io (cmGetContext (cmstate st))
+ when prompt (io (hPutStr hdl (mod ++ "> ")))
l <- io (IO.try (hGetLine hdl))
case l of
Left e | isEOFError e -> return ()
readlineLoop :: GHCi ()
readlineLoop = do
st <- getGHCiState
- l <- io (readline (moduleUserString (current_module st) ++ "> "))
+ mod <- io (cmGetContext (cmstate st))
+ l <- io (readline (mod ++ "> "))
case l of
Nothing -> return ()
Just l ->
doCommand c
doCommand (':' : command) = specialCommand command
-doCommand ('-':'-':_) = return False -- comments, useful in scripts
-doCommand expr
- = do expr_expanded <- expandExpr expr
- -- io (putStrLn ( "Before: " ++ expr ++ "\nAfter: " ++ expr_expanded))
- expr_ok <- timeIt (do stuff <- evalExpr expr_expanded
- finishEvalExpr stuff)
- when expr_ok (rememberExpr expr_expanded)
+doCommand stmt
+ = do timeIt (do stuff <- runStmt stmt; finishEvalExpr stuff)
return False
+-- Returns True if the expr was successfully parsed, renamed and
+-- typechecked.
+runStmt :: String -> GHCi (Maybe [Name])
+runStmt stmt
+ | null (filter (not.isSpace) stmt)
+ = return Nothing
+ | otherwise
+ = do st <- getGHCiState
+ dflags <- io (getDynFlags)
+ let dflags' = dopt_unset dflags Opt_WarnUnusedBinds
+ (new_cmstate, names) <- io (cmRunStmt (cmstate st) dflags' stmt)
+ setGHCiState st{cmstate = new_cmstate}
+ return (Just names)
+
-- possibly print the type and revert CAFs after evaluating an expression
finishEvalExpr Nothing = return False
-finishEvalExpr (Just (unqual,ty))
+finishEvalExpr (Just names)
= do b <- isOptionSet ShowType
- io (when b (printForUser stdout unqual (text "::" <+> ppr ty)))
+ st <- getGHCiState
+ when b (mapM_ (showTypeOfName (cmstate st)) names)
+
b <- isOptionSet RevertCAFs
io (when b revertCAFs)
+ flushEverything
return True
--- Returned Maybe indicates whether or not the expr was successfully
--- parsed, renamed and typechecked.
-evalExpr :: String -> GHCi (Maybe (PrintUnqualified,Type))
-evalExpr expr
- | null (filter (not.isSpace) expr)
- = return Nothing
- | otherwise
- = do st <- getGHCiState
- dflags <- io (getDynFlags)
- (new_cmstate, maybe_stuff) <-
- io (cmGetExpr (cmstate st) dflags True (current_module st) expr)
- setGHCiState st{cmstate = new_cmstate}
- case maybe_stuff of
- Nothing -> return Nothing
- Just (hv, unqual, ty) -> do io (cmRunExpr hv)
- flushEverything
- return (Just (unqual,ty))
+showTypeOfName :: CmState -> Name -> GHCi ()
+showTypeOfName cmstate n
+ = do maybe_str <- io (cmTypeOfName cmstate n)
+ case maybe_str of
+ Nothing -> return ()
+ Just str -> io (putStrLn (showSDoc (ppr n) ++ " :: " ++ str))
flushEverything :: GHCi ()
flushEverything
= io $ do flush_so <- readIORef flush_stdout
- cmRunExpr flush_so
+ flush_so
flush_se <- readIORef flush_stdout
- cmRunExpr flush_se
+ flush_se
+ return ()
specialCommand :: String -> GHCi Bool
specialCommand ('!':str) = shellEscape (dropWhile isSpace str)
foldr1 (\a b -> a ++ ',':b) (map fst cs)
++ ")") >> return False)
-noArgs c = io (hPutStrLn stdout ("command `:" ++ c ++ "' takes no arguments"))
+noArgs c = throwDyn (OtherError ("command `" ++ c ++ "' takes no arguments"))
-----------------------------------------------------------------------------
-- Commands
= throwDyn (OtherError "syntax: `:m <module>'")
setContext m | not (isUpper (head m)) || not (all isAlphaNum (tail m))
= throwDyn (OtherError ("strange looking module name: `" ++ m ++ "'"))
-setContext mn
- = do m <- io (moduleNameToModule (mkModuleName mn))
- st <- getGHCiState
- if (isHomeModule m && m `notElem` modules st)
- then throwDyn (OtherError (showSDoc (quotes (ppr (moduleName m))
- <+> text "is not currently loaded, use :load")))
- else setGHCiState st{current_module = m}
-
-moduleNameToModule :: ModuleName -> IO Module
-moduleNameToModule mn
- = do maybe_stuff <- findModule mn
- case maybe_stuff of
- Nothing -> throwDyn (OtherError ("can't find module `"
- ++ moduleNameUserString mn ++ "'"))
- Just (m,_) -> return m
+setContext str
+ = do st <- getGHCiState
+ new_cmstate <- io (cmSetContext (cmstate st) str)
+ setGHCiState st{cmstate=new_cmstate}
changeDirectory :: String -> GHCi ()
+changeDirectory ('~':d) = do
+ tilde <- io (getEnv "HOME") -- will fail if HOME not defined
+ io (setCurrentDirectory (tilde ++ '/':d))
changeDirectory d = io (setCurrentDirectory d)
defineMacro :: String -> GHCi ()
else do
if (macro_name `elem` map fst cmds)
then throwDyn (OtherError
- ("command `" ++ macro_name ++ "' already defined"))
+ ("command `" ++ macro_name ++ "' is already defined"))
else do
-- give the expression a type signature, so we can be sure we're getting
-- compile the expression
st <- getGHCiState
dflags <- io (getDynFlags)
- (new_cmstate, maybe_stuff) <-
- io (cmGetExpr (cmstate st) dflags False (current_module st) new_expr)
+ (new_cmstate, maybe_hv) <- io (cmCompileExpr (cmstate st) dflags new_expr)
setGHCiState st{cmstate = new_cmstate}
- case maybe_stuff of
+ case maybe_hv of
Nothing -> return ()
- Just (hv, unqual, ty)
- -> io (writeIORef commands
- ((macro_name, keepGoing (runMacro hv)) : cmds))
+ Just hv -> io (writeIORef commands --
+ ((macro_name, keepGoing (runMacro hv)) : cmds))
runMacro :: HValue{-String -> IO String-} -> String -> GHCi ()
runMacro fun s = do
cmstate1 <- io (cmUnload (cmstate state))
io (revertCAFs) -- always revert CAFs on load.
(cmstate2, ok, mods) <- io (cmLoadModule cmstate1 path)
-
- def_mod <- io (readIORef defaultCurrentModule)
-
- let new_state = state{
- cmstate = cmstate2,
- modules = mods,
- current_module = case mods of
- [] -> def_mod
- xs -> head xs,
- target = Just path
- }
+ let new_state = state{ cmstate = cmstate2,
+ target = Just path
+ }
setGHCiState new_state
-
- let mod_commas
- | null mods = text "none."
- | otherwise = hsep (
- punctuate comma (map (text.moduleUserString) mods)) <> text "."
- case ok of
- False ->
- io (putStrLn (showSDoc (text "Failed, modules loaded: " <> mod_commas)))
- True ->
- io (putStrLn (showSDoc (text "Ok, modules loaded: " <> mod_commas)))
+ modulesLoadedMsg ok mods
reloadModule :: String -> GHCi ()
reloadModule "" = do
Just path
-> do io (revertCAFs) -- always revert CAFs on reload.
(new_cmstate, ok, mods) <- io (cmLoadModule (cmstate state) path)
- def_mod <- io (readIORef defaultCurrentModule)
- setGHCiState
- state{cmstate=new_cmstate,
- modules = mods,
- current_module = case mods of
- [] -> def_mod
- xs -> head xs
- }
+ setGHCiState state{ cmstate=new_cmstate }
+ modulesLoadedMsg ok mods
reloadModule _ = noArgs ":reload"
+
+modulesLoadedMsg ok mods = do
+ let mod_commas
+ | null mods = text "none."
+ | otherwise = hsep (
+ punctuate comma (map text mods)) <> text "."
+ case ok of
+ False ->
+ io (putStrLn (showSDoc (text "Failed, modules loaded: " <> mod_commas)))
+ True ->
+ io (putStrLn (showSDoc (text "Ok, modules loaded: " <> mod_commas)))
+
+
typeOfExpr :: String -> GHCi ()
typeOfExpr str
= do st <- getGHCiState
dflags <- io (getDynFlags)
- (new_cmstate, maybe_ty) <- io (cmGetExpr (cmstate st) dflags False
- (current_module st) str)
+ (new_cmstate, maybe_tystr) <- io (cmTypeOfExpr (cmstate st) dflags str)
setGHCiState st{cmstate = new_cmstate}
- case maybe_ty of
- Nothing -> return ()
- Just (_, unqual, ty) -> io (printForUser stdout unqual (ppr ty))
+ case maybe_tystr of
+ Nothing -> return ()
+ Just tystr -> io (putStrLn tystr)
quit :: String -> GHCi Bool
quit _ = return True
optToStr RevertCAFs = "r"
-----------------------------------------------------------------------------
--- Code to do last-expression-entered stuff. (a.k.a the $$ facility)
-
--- Take a string and replace $$s in it with the last expr, if any.
-expandExpr :: String -> GHCi String
-expandExpr str
- = do mle <- getLastExpr
- return (outside mle str)
- where
- outside mle ('$':'$':cs)
- = case mle of
- Just le -> " (" ++ le ++ ") " ++ outside mle cs
- Nothing -> outside mle cs
-
- outside mle [] = []
- outside mle ('"':str) = '"' : inside2 mle str -- "
- outside mle ('\'':str) = '\'' : inside1 mle str -- '
- outside mle (c:cs) = c : outside mle cs
-
- inside2 mle ('"':cs) = '"' : outside mle cs -- "
- inside2 mle (c:cs) = c : inside2 mle cs
- inside2 mle [] = []
-
- inside1 mle ('\'':cs) = '\'': outside mle cs
- inside1 mle (c:cs) = c : inside1 mle cs
- inside1 mle [] = []
-
-
-rememberExpr :: String -> GHCi ()
-rememberExpr str
- = do let cleaned = (clean . reverse . clean . reverse) str
- let forget_me_not | null cleaned = Nothing
- | otherwise = Just cleaned
- setLastExpr forget_me_not
- where
- clean = dropWhile isSpace
-
-
------------------------------------------------------------------------------
-- GHCi monad
data GHCiState = GHCiState
{
- modules :: [Module],
- current_module :: Module,
target :: Maybe FilePath,
cmstate :: CmState,
- options :: [GHCiOption],
- last_expr :: Maybe String
+ options :: [GHCiOption]
}
data GHCiOption
| RevertCAFs -- revert CAFs after every evaluation
deriving Eq
-defaultCurrentModuleName = mkModuleName "Prelude"
-GLOBAL_VAR(defaultCurrentModule, error "no defaultCurrentModule", Module)
-
-GLOBAL_VAR(flush_stdout, error "no flush_stdout", HValue)
-GLOBAL_VAR(flush_stderr, error "no flush_stdout", HValue)
+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) }
= do st <- getGHCiState
setGHCiState (st{ options = filter (/= opt) (options st) })
-getLastExpr :: GHCi (Maybe String)
-getLastExpr
- = do st <- getGHCiState ; return (last_expr st)
-
-setLastExpr :: Maybe String -> GHCi ()
-setLastExpr last_expr
- = do st <- getGHCiState ; setGHCiState (st{last_expr = last_expr})
-
io m = GHCi $ \s -> m >>= \a -> return (s,a)
-----------------------------------------------------------------------------
-----------------------------------------------------------------------------
-- package loader
-linkPackages :: [Package] -> IO ()
-linkPackages pkgs = mapM_ linkPackage pkgs
-
-linkPackage :: Package -> IO ()
+-- Left: full path name of a .o file, including trailing .o
+-- Right: "unadorned" name of a .DLL/.so
+-- 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.
+type LibrarySpec
+ = Either FilePath String
+
+showLS (Left nm) = "(static) " ++ nm
+showLS (Right nm) = "(dynamic) " ++ nm
+
+linkPackages :: [LibrarySpec] -> [PackageConfig] -> IO ()
+linkPackages cmdline_lib_specs pkgs
+ = do mapM_ linkPackage pkgs
+ mapM_ preloadLib cmdline_lib_specs
+ where
+ preloadLib 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"
+ 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 (OtherError "user specified .o/.so/.DLL could not be loaded.")
+
+
+linkPackage :: PackageConfig -> IO ()
-- ignore rts and gmp for now (ToDo; better?)
linkPackage pkg
| name pkg `elem` ["rts", "gmp"]
isRight (Right _) = True
isRight (Left _) = False
-
-loadClassified :: Either FilePath String -> IO ()
+loadClassified :: LibrarySpec -> IO ()
loadClassified (Left obj_absolute_filename)
- = do --putStr ("Left " ++ obj_absolute_filename ++ "\n")
- loadObj obj_absolute_filename
+ = do loadObj obj_absolute_filename
loadClassified (Right dll_unadorned)
- = do --putStr ("Right " ++ dll_unadorned ++ "\n")
- dll_ok <- ocAddDLL (packString dll_unadorned)
- if dll_ok /= 1
- then throwDyn (OtherError ("can't find .o or .so/.DLL for: "
- ++ dll_unadorned))
- else return ()
-
-locateOneObj :: [FilePath] -> String -> IO (Either FilePath String)
+ = do maybe_errmsg <- addDLL dll_unadorned
+ if maybe_errmsg == nullPtr
+ then return ()
+ else do str <- peekCString maybe_errmsg
+ throwDyn (OtherError ("can't find .o or .so/.DLL for: "
+ ++ dll_unadorned ++ " (" ++ str ++ ")" ))
+
+locateOneObj :: [FilePath] -> String -> IO LibrarySpec
locateOneObj [] obj
= return (Right obj) -- we assume
locateOneObj (d:ds) obj
b <- doesFileExist path
if b then return (Left path) else locateOneObj ds obj
-
-type PackedString = ByteArray Int
-foreign import "ocAddDLL" unsafe ocAddDLL :: PackedString -> IO Int
-
-----------------------------------------------------------------------------
-- timing & statistics
projects / ghc-hetmet.git / blobdiff