+{-# OPTIONS -#include "Linker.h" #-}
-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.79 2001/06/27 14:26:36 sewardj Exp $
--
-- GHC Interactive User Interface
--
--- (c) The GHC Team 2000
+-- (c) The GHC Team 2005
--
-----------------------------------------------------------------------------
+module InteractiveUI (
+ interactiveUI,
+ ghciWelcomeMsg
+ ) where
-{-# OPTIONS -#include "Linker.h" #-}
-module InteractiveUI ( interactiveUI, ghciWelcomeMsg ) where
-
-#include "../includes/config.h"
#include "HsVersions.h"
-import Packages
-import CompManager
-import HscTypes ( GhciMode(..) )
-import ByteCodeLink
-import DriverFlags
-import DriverState
-import DriverUtil
-import Linker
-import Finder ( flushPackageCache )
-import Util
-import Name ( Name )
+-- The GHC interface
+import qualified GHC
+import GHC ( Session, verbosity, dopt, DynFlag(..), Target(..),
+ TargetId(..),
+ mkModule, pprModule, Type, Module, SuccessFlag(..),
+ TyThing(..), Name, LoadHowMuch(..), Phase,
+ GhcException(..), showGhcException,
+ CheckedModule(..), SrcLoc )
+import PprTyThing
import Outputable
-import CmdLineOpts ( DynFlag(..), getDynFlags, saveDynFlags, restoreDynFlags, dopt_unset )
-import Panic ( GhcException(..) )
-import Config
-#ifndef mingw32_TARGET_OS
-import Posix
+-- for createtags (should these come via GHC?)
+import Module( moduleUserString )
+import Name( nameSrcLoc, nameModule, nameOccName )
+import OccName( pprOccName )
+import SrcLoc( isGoodSrcLoc, srcLocFile, srcLocLine, srcLocCol )
+
+-- Other random utilities
+import Digraph ( flattenSCCs )
+import BasicTypes ( failed, successIf )
+import Panic ( panic, installSignalHandlers )
+import Config
+import StaticFlags ( opt_IgnoreDotGhci )
+import Linker ( showLinkerState )
+import Util ( removeSpaces, handle, global, toArgs,
+ looksLikeModuleName, prefixMatch, sortLe )
+
+#ifndef mingw32_HOST_OS
+import System.Posix
+#if __GLASGOW_HASKELL__ > 504
+ hiding (getEnv)
+#endif
+#else
+import GHC.ConsoleHandler ( flushConsole )
#endif
-import Exception
-import Dynamic
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
-import Readline
+#ifdef USE_READLINE
+import Control.Concurrent ( yield ) -- Used in readline loop
+import System.Console.Readline as Readline
#endif
-import IOExts
+
+--import SystemExts
+
+import Control.Exception as Exception
+import Data.Dynamic
+-- import Control.Concurrent
import Numeric
-import List
-import System
-import CPUTime
-import Directory
-import IO
-import Char
-import Monad ( when )
-
-import PrelGHC ( unsafeCoerce# )
-import Foreign ( nullPtr )
-import CString ( peekCString )
+import Data.List
+import Data.Int ( Int64 )
+import Data.Maybe ( isJust, fromMaybe, catMaybes )
+import System.Cmd
+import System.CPUTime
+import System.Environment
+import System.Exit ( exitWith, ExitCode(..) )
+import System.Directory
+import System.IO
+import System.IO.Error as IO
+import Data.Char
+import Control.Monad as Monad
+import Foreign.StablePtr ( newStablePtr )
+
+import GHC.Exts ( unsafeCoerce# )
+import GHC.IOBase ( IOErrorType(InvalidArgument) )
+
+import Data.IORef ( IORef, newIORef, readIORef, writeIORef )
+
+import System.Posix.Internals ( setNonBlockingFD )
-----------------------------------------------------------------------------
-ghciWelcomeMsg = "\
-\ ___ ___ _\n\
-\ / _ \\ /\\ /\\/ __(_)\n\
-\ / /_\\// /_/ / / | | GHC Interactive, version " ++ cProjectVersion ++ ", for Haskell 98.\n\
-\/ /_\\\\/ __ / /___| | http://www.haskell.org/ghc/\n\
-\\\____/\\/ /_/\\____/|_| Type :? for help.\n"
+ghciWelcomeMsg =
+ " ___ ___ _\n"++
+ " / _ \\ /\\ /\\/ __(_)\n"++
+ " / /_\\// /_/ / / | | GHC Interactive, version " ++ cProjectVersion ++ ", for Haskell 98.\n"++
+ "/ /_\\\\/ __ / /___| | http://www.haskell.org/ghc/\n"++
+ "\\____/\\/ /_/\\____/|_| Type :? for help.\n"
GLOBAL_VAR(commands, builtin_commands, [(String, String -> GHCi Bool)])
builtin_commands :: [(String, String -> GHCi Bool)]
builtin_commands = [
- ("add", keepGoing addModule),
+ ("add", keepGoingPaths addModule),
+ ("browse", keepGoing browseCmd),
("cd", keepGoing changeDirectory),
("def", keepGoing defineMacro),
("help", keepGoing help),
("?", keepGoing help),
- ("load", keepGoing loadModule),
+ ("info", keepGoing info),
+ ("load", keepGoingPaths loadModule_),
("module", keepGoing setContext),
("reload", keepGoing reloadModule),
- ("set", keepGoing setOptions),
+ ("check", keepGoing checkModule),
+ ("set", keepGoing setCmd),
+ ("show", keepGoing showCmd),
+ ("etags", keepGoing createETagsFileCmd),
+ ("ctags", keepGoing createCTagsFileCmd),
("type", keepGoing typeOfExpr),
+ ("kind", keepGoing kindOfType),
("unset", keepGoing unsetOptions),
("undef", keepGoing undefineMacro),
("quit", quit)
keepGoing :: (String -> GHCi ()) -> (String -> GHCi Bool)
keepGoing a str = a str >> return False
+keepGoingPaths :: ([FilePath] -> GHCi ()) -> (String -> GHCi Bool)
+keepGoingPaths a str = a (toArgs str) >> return False
+
shortHelpText = "use :? for help.\n"
-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 its 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\
-\\
-\ +r revert top-level expressions after each evaluation\n\
-\ +s print timing/memory stats after each evaluation\n\
-\ +t print type after 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 -> [FilePath] -> [LibrarySpec] -> IO ()
-interactiveUI cmstate paths cmdline_libs = do
+-- NOTE: spaces at the end of each line to workaround CPP/string gap bug.
+helpText =
+ " Commands available from the prompt:\n" ++
+ "\n" ++
+ " <stmt> evaluate/run <stmt>\n" ++
+ " :add <filename> ... add module(s) to the current target set\n" ++
+ " :browse [*]<module> display the names defined by <module>\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\n" ++
+ " :reload reload the current module set\n" ++
+ "\n" ++
+ " :set <option> ... set options\n" ++
+ " :set args <arg> ... set the arguments returned by System.getArgs\n" ++
+ " :set prog <progname> set the value returned by System.getProgName\n" ++
+ "\n" ++
+ " :show modules show the currently loaded modules\n" ++
+ " :show bindings show the current bindings made at the prompt\n" ++
+ "\n" ++
+ " :ctags [<file>] create tags file for Vi (default: \"tags\")\n" ++
+ " :etags [<file>] create tags file for Emacs (defauilt: \"TAGS\")\n" ++
+ " :type <expr> show the type of <expr>\n" ++
+ " :kind <type> show the kind of <type>\n" ++
+ " :undef <cmd> undefine user-defined command :<cmd>\n" ++
+ " :unset <option> ... unset options\n" ++
+ " :quit exit GHCi\n" ++
+ " :!<command> run the shell command <command>\n" ++
+ "\n" ++
+ " Options for ':set' and ':unset':\n" ++
+ "\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" ++
+ " -<flags> most GHC command line flags can also be set here\n" ++
+ " (eg. -v2, -fglasgow-exts, etc.)\n"
+
+
+interactiveUI :: Session -> [(FilePath, Maybe Phase)] -> Maybe String -> IO ()
+interactiveUI session srcs maybe_expr = do
+
+ -- HACK! If we happen to get into an infinite loop (eg the user
+ -- types 'let x=x in x' at the prompt), then the thread will block
+ -- on a blackhole, and become unreachable during GC. The GC will
+ -- detect that it is unreachable and send it the NonTermination
+ -- exception. However, since the thread is unreachable, everything
+ -- it refers to might be finalized, including the standard Handles.
+ -- This sounds like a bug, but we don't have a good solution right
+ -- now.
+ newStablePtr stdin
+ newStablePtr stdout
+ newStablePtr stderr
+
hFlush stdout
hSetBuffering stdout NoBuffering
- -- link in the available packages
- pkgs <- getPackageInfo
- initLinker
- linkPackages cmdline_libs pkgs
+ -- Initialise buffering for the *interpreted* I/O system
+ initInterpBuffering session
- (cmstate, ok, mods) <-
- case paths of
- [] -> return (cmstate, True, [])
- _ -> cmLoadModule cmstate paths
+ -- We don't want the cmd line to buffer any input that might be
+ -- intended for the program, so unbuffer stdin.
+ hSetBuffering stdin NoBuffering
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+ -- initial context is just the Prelude
+ GHC.setContext session [] [prelude_mod]
+
+#ifdef USE_READLINE
Readline.initialize
#endif
- dflags <- getDynFlags
-
- (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"
+ startGHCi (runGHCi srcs maybe_expr)
+ GHCiState{ progname = "<interactive>",
+ args = [],
+ session = session,
+ options = [] }
- (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"
+#ifdef USE_READLINE
+ Readline.resetTerminal Nothing
+#endif
- startGHCi runGHCi GHCiState{ targets = paths,
- cmstate = cmstate,
- options = [] }
return ()
+runGHCi :: [(FilePath, Maybe Phase)] -> Maybe String -> GHCi ()
+runGHCi paths maybe_expr = do
+ let read_dot_files = not opt_IgnoreDotGhci
+
+ 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
+
+ -- Perform a :load for files given on the GHCi command line
+ -- When in -e mode, if the load fails then we want to stop
+ -- immediately rather than going on to evaluate the expression.
+ when (not (null paths)) $ do
+ ok <- ghciHandle (\e -> do showException e; return Failed) $
+ loadModule paths
+ when (isJust maybe_expr && failed ok) $
+ io (exitWith (ExitFailure 1))
+
+ -- if verbosity is greater than 0, or we are connected to a
+ -- terminal, display the prompt in the interactive loop.
+ is_tty <- io (hIsTerminalDevice stdin)
+ dflags <- getDynFlags
+ let show_prompt = verbosity dflags > 0 || is_tty
+
+ case maybe_expr of
+ Nothing ->
+#if defined(mingw32_HOST_OS)
+ do
+ -- The win32 Console API mutates the first character of
+ -- type-ahead when reading from it in a non-buffered manner. Work
+ -- around this by flushing the input buffer of type-ahead characters,
+ -- but only if stdin is available.
+ flushed <- io (IO.try (GHC.ConsoleHandler.flushConsole stdin))
+ case flushed of
+ Left err | isDoesNotExistError err -> return ()
+ | otherwise -> io (ioError err)
+ Right () -> return ()
+#endif
+ -- enter the interactive loop
+ interactiveLoop is_tty show_prompt
+ Just expr -> do
+ -- just evaluate the expression we were given
+ runCommandEval expr
+ return ()
+
+ -- and finally, exit
+ io $ do when (verbosity dflags > 0) $ putStrLn "Leaving GHCi."
+
-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
+interactiveLoop is_tty show_prompt = do
+ -- Ignore ^C exceptions caught here
+ ghciHandleDyn (\e -> case e of
+ Interrupted -> ghciUnblock (
+#if defined(mingw32_HOST_OS)
+ io (putStrLn "") >>
+#endif
+ interactiveLoop is_tty show_prompt)
+ _other -> return ()) $ do
-- read commands from stdin
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
- readlineLoop
+#ifdef USE_READLINE
+ if (is_tty)
+ then readlineLoop
+ else fileLoop stdin show_prompt
#else
- fileLoop stdin True
+ fileLoop stdin show_prompt
#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 =
- handle (\_ -> return False) $ do
-#ifdef mingw32_TARGET_OS
- doesFileExist name
+#ifdef mingw32_HOST_OS
+ return True
#else
+ Util.handle (\_ -> return False) $ do
st <- getFileStatus name
me <- getRealUserID
if fileOwner st /= me then do
fileLoop :: Handle -> Bool -> GHCi ()
fileLoop hdl prompt = do
- st <- getGHCiState
- mod <- io (cmGetContext (cmstate st))
- when prompt (io (putStr (mod ++ "> ")))
+ session <- getSession
+ (mod,imports) <- io (GHC.getContext session)
+ when prompt (io (putStr (mkPrompt mod imports)))
l <- io (IO.try (hGetLine hdl))
case l of
- Left e | isEOFError e -> return ()
- | otherwise -> throw e
+ Left e | isEOFError e -> return ()
+ | InvalidArgument <- etype -> return ()
+ | otherwise -> io (ioError e)
+ where etype = ioeGetErrorType e
+ -- treat InvalidArgument in the same way as EOF:
+ -- this can happen if the user closed stdin, or
+ -- perhaps did getContents which closes stdin at
+ -- EOF.
Right l ->
- case remove_spaces l of
+ case removeSpaces l of
"" -> fileLoop hdl prompt
l -> do quit <- runCommand l
if quit then return () else fileLoop hdl prompt
stringLoop :: [String] -> GHCi ()
stringLoop [] = return ()
stringLoop (s:ss) = do
- st <- getGHCiState
- case remove_spaces s of
+ case removeSpaces s of
"" -> stringLoop ss
l -> do quit <- runCommand l
if quit then return () else stringLoop ss
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+mkPrompt toplevs exports
+ = showSDoc (hsep (map (\m -> char '*' <> pprModule m) toplevs)
+ <+> hsep (map pprModule exports)
+ <> text "> ")
+
+#ifdef USE_READLINE
readlineLoop :: GHCi ()
readlineLoop = do
- st <- getGHCiState
- mod <- io (cmGetContext (cmstate st))
- l <- io (readline (mod ++ "> "))
+ session <- getSession
+ (mod,imports) <- io (GHC.getContext session)
+ io yield
+ l <- io (readline (mkPrompt mod imports)
+ `finally` setNonBlockingFD 0)
+ -- readline sometimes puts stdin into blocking mode,
+ -- so we need to put it back for the IO library
case l of
Nothing -> return ()
Just l ->
- case remove_spaces l of
+ case removeSpaces l of
"" -> readlineLoop
l -> do
io (addHistory l)
if quit then return () else readlineLoop
#endif
--- Top level exception handler, just prints out the exception
--- and carries on.
runCommand :: String -> GHCi Bool
-runCommand c =
- ghciHandle ( \exception -> do
- flushEverything
- showException exception
- return False
- ) $
- doCommand c
+runCommand c = ghciHandle handler (doCommand c)
+ where
+ doCommand (':' : command) = specialCommand command
+ doCommand stmt
+ = do timeIt (do nms <- runStmt stmt; finishEvalExpr nms)
+ return False
+
+-- This version is for the GHC command-line option -e. The only difference
+-- from runCommand is that it catches the ExitException exception and
+-- exits, rather than printing out the exception.
+runCommandEval c = ghciHandle handleEval (doCommand c)
+ where
+ handleEval (ExitException code) = io (exitWith code)
+ handleEval e = do showException e
+ io (exitWith (ExitFailure 1))
+
+ doCommand (':' : command) = specialCommand command
+ doCommand stmt
+ = do nms <- runStmt stmt
+ case nms of
+ Nothing -> io (exitWith (ExitFailure 1))
+ -- failure to run the command causes exit(1) for ghc -e.
+ _ -> finishEvalExpr nms
+
+-- This is the exception handler for exceptions generated by the
+-- user's code; it normally just prints out the exception. The
+-- handler must be recursive, in case showing the exception causes
+-- more exceptions to be raised.
+--
+-- Bugfix: if the user closed stdout or stderr, the flushing will fail,
+-- raising another exception. We therefore don't put the recursive
+-- handler arond the flushing operation, so if stderr is closed
+-- GHCi will just die gracefully rather than going into an infinite loop.
+handler :: Exception -> GHCi Bool
+handler exception = do
+ flushInterpBuffers
+ io installSignalHandlers
+ ghciHandle handler (showException exception >> return False)
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))
+ Nothing -> io (putStrLn ("*** Exception: (unknown)"))
+ Just Interrupted -> io (putStrLn "Interrupted.")
+ Just (CmdLineError s) -> io (putStrLn s) -- omit the location for CmdLineError
+ Just ph@PhaseFailed{} -> io (putStrLn (showGhcException ph "")) -- ditto
+ Just other_ghc_ex -> io (print other_ghc_ex)
+
showException other_exception
= io (putStrLn ("*** Exception: " ++ show other_exception))
-doCommand (':' : command) = specialCommand command
-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
+ | null (filter (not.isSpace) stmt) = return (Just [])
| 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)
+ session <- getSession
+ result <- io $ withProgName (progname st) $ withArgs (args st) $
+ GHC.runStmt session stmt
+ case result of
+ GHC.RunFailed -> return Nothing
+ GHC.RunException e -> throw e -- this is caught by runCommand(Eval)
+ GHC.RunOk names -> return (Just names)
-- possibly print the type and revert CAFs after evaluating an expression
-finishEvalExpr Nothing = return False
-finishEvalExpr (Just names)
+finishEvalExpr mb_names
= do b <- isOptionSet ShowType
- st <- getGHCiState
- when b (mapM_ (showTypeOfName (cmstate st)) names)
+ session <- getSession
+ case mb_names of
+ Nothing -> return ()
+ Just names -> when b (mapM_ (showTypeOfName session) names)
+ flushInterpBuffers
+ io installSignalHandlers
b <- isOptionSet RevertCAFs
io (when b revertCAFs)
- flushEverything
return True
-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
- flush_so
- flush_se <- readIORef flush_stdout
- flush_se
- return ()
+showTypeOfName :: Session -> Name -> GHCi ()
+showTypeOfName session n
+ = do maybe_tything <- io (GHC.lookupName session n)
+ case maybe_tything of
+ Nothing -> return ()
+ Just thing -> showTyThing thing
+
+showForUser :: SDoc -> GHCi String
+showForUser doc = do
+ session <- getSession
+ unqual <- io (GHC.getPrintUnqual session)
+ return $! showSDocForUser unqual doc
specialCommand :: String -> GHCi Bool
specialCommand ('!':str) = shellEscape (dropWhile isSpace str)
let (cmd,rest) = break isSpace str
cmds <- io (readIORef commands)
case [ (s,f) | (s,f) <- cmds, prefixMatch cmd s ] of
- [] -> io (hPutStr stdout ("unknown command `:" ++ cmd ++ "'\n"
+ [] -> io (hPutStr stdout ("unknown command ':" ++ cmd ++ "'\n"
++ shortHelpText) >> return False)
[(_,f)] -> f (dropWhile isSpace rest)
cs -> io (hPutStrLn stdout ("prefix " ++ cmd ++
foldr1 (\a b -> a ++ ',':b) (map fst cs)
++ ")") >> return False)
-noArgs c = throwDyn (CmdLineError ("command `" ++ c ++ "' takes no arguments"))
+-----------------------------------------------------------------------------
+-- To flush buffers for the *interpreted* computation we need
+-- to refer to *its* stdout/stderr handles
+
+GLOBAL_VAR(flush_interp, error "no flush_interp", IO ())
+GLOBAL_VAR(turn_off_buffering, error "no flush_stdout", IO ())
+
+no_buf_cmd = "System.IO.hSetBuffering System.IO.stdout System.IO.NoBuffering" ++
+ " Prelude.>> System.IO.hSetBuffering System.IO.stderr System.IO.NoBuffering"
+flush_cmd = "System.IO.hFlush System.IO.stdout Prelude.>> System.IO.hFlush IO.stderr"
+
+initInterpBuffering :: Session -> IO ()
+initInterpBuffering session
+ = do maybe_hval <- GHC.compileExpr session no_buf_cmd
+
+ case maybe_hval of
+ Just hval -> writeIORef turn_off_buffering (unsafeCoerce# hval :: IO ())
+ other -> panic "interactiveUI:setBuffering"
+
+ maybe_hval <- GHC.compileExpr session flush_cmd
+ case maybe_hval of
+ Just hval -> writeIORef flush_interp (unsafeCoerce# hval :: IO ())
+ _ -> panic "interactiveUI:flush"
+
+ turnOffBuffering -- Turn it off right now
+
+ return ()
+
+
+flushInterpBuffers :: GHCi ()
+flushInterpBuffers
+ = io $ do Monad.join (readIORef flush_interp)
+ return ()
+
+turnOffBuffering :: IO ()
+turnOffBuffering
+ = do Monad.join (readIORef turn_off_buffering)
+ return ()
-----------------------------------------------------------------------------
-- Commands
help :: String -> GHCi ()
help _ = io (putStr helpText)
-addModule :: String -> GHCi ()
-addModule path = do
- state <- getGHCiState
- dflags <- io (getDynFlags)
+info :: String -> GHCi ()
+info "" = throwDyn (CmdLineError "syntax: ':i <thing-you-want-info-about>'")
+info s = do { let names = words s
+ ; session <- getSession
+ ; dflags <- getDynFlags
+ ; let exts = dopt Opt_GlasgowExts dflags
+ ; mapM_ (infoThing exts session) names }
+ where
+ infoThing exts session str = io $ do
+ names <- GHC.parseName session str
+ let filtered = filterOutChildren names
+ mb_stuffs <- mapM (GHC.getInfo session) filtered
+ unqual <- GHC.getPrintUnqual session
+ putStrLn (showSDocForUser unqual $
+ vcat (intersperse (text "") $
+ [ pprInfo exts stuff | Just stuff <- mb_stuffs ]))
+
+ -- Filter out names whose parent is also there Good
+ -- example is '[]', which is both a type and data
+ -- constructor in the same type
+filterOutChildren :: [Name] -> [Name]
+filterOutChildren names = filter (not . parent_is_there) names
+ where parent_is_there n
+ | Just p <- GHC.nameParent_maybe n = p `elem` names
+ | otherwise = False
+
+pprInfo exts (thing, fixity, insts)
+ = pprTyThingInContextLoc exts thing
+ $$ show_fixity fixity
+ $$ vcat (map GHC.pprInstance insts)
+ where
+ show_fixity fix
+ | fix == GHC.defaultFixity = empty
+ | otherwise = ppr fix <+> ppr (GHC.getName thing)
+
+-----------------------------------------------------------------------------
+-- Commands
+
+addModule :: [FilePath] -> GHCi ()
+addModule files = do
io (revertCAFs) -- always revert CAFs on load/add.
- let new_targets = path : 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 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)
- setGHCiState st{cmstate=new_cmstate}
+ files <- mapM expandPath files
+ targets <- mapM (\m -> io (GHC.guessTarget m Nothing)) files
+ session <- getSession
+ io (mapM_ (GHC.addTarget session) targets)
+ ok <- io (GHC.load session LoadAllTargets)
+ afterLoad ok session
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)
+changeDirectory dir = do
+ session <- getSession
+ graph <- io (GHC.getModuleGraph session)
+ when (not (null graph)) $
+ io $ putStr "Warning: changing directory causes all loaded modules to be unloaded,\nbecause the search path has changed.\n"
+ io (GHC.setTargets session [])
+ io (GHC.load session LoadAllTargets)
+ setContextAfterLoad session []
+ io (GHC.workingDirectoryChanged session)
+ dir <- expandPath dir
+ io (setCurrentDirectory dir)
defineMacro :: String -> GHCi ()
defineMacro s = do
else do
if (macro_name `elem` map fst cmds)
then throwDyn (CmdLineError
- ("command `" ++ macro_name ++ "' is already defined"))
+ ("command '" ++ macro_name ++ "' is already defined"))
else do
-- give the expression a type signature, so we can be sure we're getting
let new_expr = '(' : definition ++ ") :: String -> IO String"
-- compile the expression
- st <- getGHCiState
- dflags <- io getDynFlags
- (new_cmstate, maybe_hv) <- io (cmCompileExpr (cmstate st) dflags new_expr)
- setGHCiState st{cmstate = new_cmstate}
+ cms <- getSession
+ maybe_hv <- io (GHC.compileExpr cms new_expr)
case maybe_hv of
Nothing -> return ()
Just hv -> io (writeIORef commands --
((macro_name, keepGoing (runMacro hv)) : cmds))
-runMacro :: HValue{-String -> IO String-} -> String -> GHCi ()
+runMacro :: GHC.HValue{-String -> IO String-} -> String -> GHCi ()
runMacro fun s = do
str <- io ((unsafeCoerce# fun :: String -> IO String) s)
stringLoop (lines str)
cmds <- io (readIORef commands)
if (macro_name `elem` map fst builtin_commands)
then throwDyn (CmdLineError
- ("command `" ++ macro_name ++ "' cannot be undefined"))
+ ("command '" ++ macro_name ++ "' cannot be undefined"))
else do
if (macro_name `notElem` map fst cmds)
then throwDyn (CmdLineError
- ("command `" ++ macro_name ++ "' not defined"))
+ ("command '" ++ macro_name ++ "' not defined"))
else do
io (writeIORef commands (filter ((/= macro_name) . fst) cmds))
-loadModule :: String -> GHCi ()
-loadModule path = timeIt (loadModule' path)
-loadModule' path = do
- 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] }
- modulesLoadedMsg ok mods
+loadModule :: [(FilePath, Maybe Phase)] -> GHCi SuccessFlag
+loadModule fs = timeIt (loadModule' fs)
+
+loadModule_ :: [FilePath] -> GHCi ()
+loadModule_ fs = do loadModule (zip fs (repeat Nothing)); return ()
+
+loadModule' :: [(FilePath, Maybe Phase)] -> GHCi SuccessFlag
+loadModule' files = do
+ session <- getSession
+
+ -- unload first
+ io (GHC.setTargets session [])
+ io (GHC.load session LoadAllTargets)
+
+ -- expand tildes
+ let (filenames, phases) = unzip files
+ exp_filenames <- mapM expandPath filenames
+ let files' = zip exp_filenames phases
+ targets <- io (mapM (uncurry GHC.guessTarget) files')
+
+ -- NOTE: we used to do the dependency anal first, so that if it
+ -- fails we didn't throw away the current set of modules. This would
+ -- require some re-working of the GHC interface, so we'll leave it
+ -- as a ToDo for now.
+
+ io (GHC.setTargets session targets)
+ ok <- io (GHC.load session LoadAllTargets)
+ afterLoad ok session
+ return ok
+
+checkModule :: String -> GHCi ()
+checkModule m = do
+ let modl = mkModule m
+ session <- getSession
+ result <- io (GHC.checkModule session modl)
+ case result of
+ Nothing -> io $ putStrLn "Nothing"
+ Just r -> io $ putStrLn (showSDoc (
+ case checkedModuleInfo r of
+ Just cm | Just scope <- GHC.modInfoTopLevelScope cm ->
+ let
+ (local,global) = partition ((== modl) . GHC.nameModule) scope
+ in
+ (text "global names: " <+> ppr global) $$
+ (text "local names: " <+> ppr local)
+ _ -> empty))
+ afterLoad (successIf (isJust result)) session
reloadModule :: String -> GHCi ()
reloadModule "" = do
- state <- getGHCiState
- 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) paths)
- setGHCiState state{ cmstate=new_cmstate }
- modulesLoadedMsg ok mods
-
-reloadModule _ = noArgs ":reload"
-
-
+ io (revertCAFs) -- always revert CAFs on reload.
+ session <- getSession
+ ok <- io (GHC.load session LoadAllTargets)
+ afterLoad ok session
+reloadModule m = do
+ io (revertCAFs) -- always revert CAFs on reload.
+ session <- getSession
+ ok <- io (GHC.load session (LoadUpTo (mkModule m)))
+ afterLoad ok session
+
+afterLoad ok session = do
+ io (revertCAFs) -- always revert CAFs on load.
+ graph <- io (GHC.getModuleGraph session)
+ graph' <- filterM (io . GHC.isLoaded session . GHC.ms_mod) graph
+ setContextAfterLoad session graph'
+ modulesLoadedMsg ok (map GHC.ms_mod graph')
+
+setContextAfterLoad session [] = do
+ io (GHC.setContext session [] [prelude_mod])
+setContextAfterLoad session ms = do
+ -- load a target if one is available, otherwise load the topmost module.
+ targets <- io (GHC.getTargets session)
+ case [ m | Just m <- map (findTarget ms) targets ] of
+ [] ->
+ let graph' = flattenSCCs (GHC.topSortModuleGraph True ms Nothing) in
+ load_this (last graph')
+ (m:_) ->
+ load_this m
+ where
+ findTarget ms t
+ = case filter (`matches` t) ms of
+ [] -> Nothing
+ (m:_) -> Just m
+
+ summary `matches` Target (TargetModule m) _
+ = GHC.ms_mod summary == m
+ summary `matches` Target (TargetFile f _) _
+ | Just f' <- GHC.ml_hs_file (GHC.ms_location summary) = f == f'
+ summary `matches` target
+ = False
+
+ load_this summary | m <- GHC.ms_mod summary = do
+ b <- io (GHC.moduleIsInterpreted session m)
+ if b then io (GHC.setContext session [m] [])
+ else io (GHC.setContext session [] [prelude_mod,m])
+
+
+modulesLoadedMsg :: SuccessFlag -> [Module] -> GHCi ()
modulesLoadedMsg ok mods = do
- let mod_commas
+ dflags <- getDynFlags
+ when (verbosity dflags > 0) $ do
+ let mod_commas
| null mods = text "none."
| otherwise = hsep (
- punctuate comma (map text mods)) <> text "."
- case ok of
- False ->
+ punctuate comma (map pprModule mods)) <> text "."
+ case ok of
+ Failed ->
io (putStrLn (showSDoc (text "Failed, modules loaded: " <> mod_commas)))
- True ->
+ Succeeded ->
io (putStrLn (showSDoc (text "Ok, modules loaded: " <> mod_commas)))
typeOfExpr :: String -> GHCi ()
typeOfExpr str
- = do st <- getGHCiState
- dflags <- io getDynFlags
- (new_cmstate, maybe_tystr) <- io (cmTypeOfExpr (cmstate st) dflags str)
- setGHCiState st{cmstate = new_cmstate}
- case maybe_tystr of
+ = do cms <- getSession
+ maybe_ty <- io (GHC.exprType cms str)
+ case maybe_ty of
+ Nothing -> return ()
+ Just ty -> do ty' <- cleanType ty
+ tystr <- showForUser (ppr ty')
+ io (putStrLn (str ++ " :: " ++ tystr))
+
+kindOfType :: String -> GHCi ()
+kindOfType str
+ = do cms <- getSession
+ maybe_ty <- io (GHC.typeKind cms str)
+ case maybe_ty of
Nothing -> return ()
- Just tystr -> io (putStrLn tystr)
+ Just ty -> do tystr <- showForUser (ppr ty)
+ io (putStrLn (str ++ " :: " ++ tystr))
quit :: String -> GHCi Bool
quit _ = return True
shellEscape :: String -> GHCi Bool
shellEscape str = io (system str >> return False)
+-----------------------------------------------------------------------------
+-- create tags file for currently loaded modules.
+
+createETagsFileCmd, createCTagsFileCmd :: String -> GHCi ()
+
+createCTagsFileCmd "" = ghciCreateTagsFile CTags "tags"
+createCTagsFileCmd file = ghciCreateTagsFile CTags file
+
+createETagsFileCmd "" = ghciCreateTagsFile ETags "TAGS"
+createETagsFileCmd file = ghciCreateTagsFile ETags file
+
+data TagsKind = ETags | CTags
+
+ghciCreateTagsFile :: TagsKind -> FilePath -> GHCi ()
+ghciCreateTagsFile kind file = do
+ session <- getSession
+ io $ createTagsFile session kind file
+
+-- ToDo:
+-- - remove restriction that all modules must be interpreted
+-- (problem: we don't know source locations for entities unless
+-- we compiled the module.
+--
+-- - extract createTagsFile so it can be used from the command-line
+-- (probably need to fix first problem before this is useful).
+--
+createTagsFile :: Session -> TagsKind -> FilePath -> IO ()
+createTagsFile session tagskind tagFile = do
+ graph <- GHC.getModuleGraph session
+ let ms = map GHC.ms_mod graph
+ tagModule m = do
+ is_interpreted <- GHC.moduleIsInterpreted session m
+ -- should we just skip these?
+ when (not is_interpreted) $
+ throwDyn (CmdLineError ("module '" ++ moduleUserString m ++ "' is not interpreted"))
+
+ mbModInfo <- GHC.getModuleInfo session m
+ let unqual
+ | Just modinfo <- mbModInfo,
+ Just unqual <- GHC.modInfoPrintUnqualified modinfo = unqual
+ | otherwise = GHC.alwaysQualify
+
+ case mbModInfo of
+ Just modInfo -> return $! listTags unqual modInfo
+ _ -> return []
+
+ mtags <- mapM tagModule ms
+ either_res <- collateAndWriteTags tagskind tagFile $ concat mtags
+ case either_res of
+ Left e -> hPutStrLn stderr $ ioeGetErrorString e
+ Right _ -> return ()
+
+listTags :: PrintUnqualified -> GHC.ModuleInfo -> [TagInfo]
+listTags unqual modInfo =
+ [ tagInfo unqual name loc
+ | name <- GHC.modInfoExports modInfo
+ , let loc = nameSrcLoc name
+ , isGoodSrcLoc loc
+ ]
+
+type TagInfo = (String -- tag name
+ ,String -- file name
+ ,Int -- line number
+ ,Int -- column number
+ )
+
+-- get tag info, for later translation into Vim or Emacs style
+tagInfo :: PrintUnqualified -> Name -> SrcLoc -> TagInfo
+tagInfo unqual name loc
+ = ( showSDocForUser unqual $ pprOccName (nameOccName name)
+ , showSDocForUser unqual $ ftext (srcLocFile loc)
+ , srcLocLine loc
+ , srcLocCol loc
+ )
+
+collateAndWriteTags :: TagsKind -> FilePath -> [TagInfo] -> IO (Either IOError ())
+collateAndWriteTags CTags file tagInfos = do -- ctags style, Vim et al
+ let tags = unlines $ sortLe (<=) $ nub $ map showTag tagInfos
+ IO.try (writeFile file tags)
+collateAndWriteTags ETags file tagInfos = do -- etags style, Emacs/XEmacs
+ let byFile op (_,f1,_,_) (_,f2,_,_) = f1 `op` f2
+ groups = groupBy (byFile (==)) $ sortLe (byFile (<=)) tagInfos
+ tagGroups <- mapM tagFileGroup groups
+ IO.try (writeFile file $ concat tagGroups)
+ where
+ tagFileGroup group@[] = throwDyn (CmdLineError "empty tag file group??")
+ tagFileGroup group@((_,fileName,_,_):_) = do
+ file <- readFile fileName -- need to get additional info from sources..
+ let byLine (_,_,l1,_) (_,_,l2,_) = l1 <= l2
+ sortedGroup = sortLe byLine group
+ tags = unlines $ perFile sortedGroup 1 0 $ lines file
+ return $ "\x0c\n" ++ fileName ++ "," ++ show (length tags) ++ "\n" ++ tags
+ perFile (tagInfo@(tag,file,lNo,colNo):tags) count pos (line:lines) | lNo>count =
+ perFile (tagInfo:tags) (count+1) (pos+length line) lines
+ perFile (tagInfo@(tag,file,lNo,colNo):tags) count pos lines@(line:_) | lNo==count =
+ showETag tagInfo line pos : perFile tags count pos lines
+ perFile tags count pos lines = []
+
+-- simple ctags format, for Vim et al
+showTag :: TagInfo -> String
+showTag (tag,file,lineNo,colNo)
+ = tag ++ "\t" ++ file ++ "\t" ++ show lineNo
+
+-- etags format, for Emacs/XEmacs
+showETag :: TagInfo -> String -> Int -> String
+showETag (tag,file,lineNo,colNo) line charPos
+ = take colNo line ++ tag
+ ++ "\x7f" ++ tag
+ ++ "\x01" ++ show lineNo
+ ++ "," ++ show charPos
+
+-----------------------------------------------------------------------------
+-- Browsing a module's contents
+
+browseCmd :: String -> GHCi ()
+browseCmd m =
+ case words m of
+ ['*':m] | looksLikeModuleName m -> browseModule m False
+ [m] | looksLikeModuleName m -> browseModule m True
+ _ -> throwDyn (CmdLineError "syntax: :browse <module>")
+
+browseModule m exports_only = do
+ s <- getSession
+
+ let modl = mkModule m
+ is_interpreted <- io (GHC.moduleIsInterpreted s modl)
+ when (not is_interpreted && not exports_only) $
+ throwDyn (CmdLineError ("module '" ++ m ++ "' is not interpreted"))
+
+ -- Temporarily set the context to the module we're interested in,
+ -- just so we can get an appropriate PrintUnqualified
+ (as,bs) <- io (GHC.getContext s)
+ io (if exports_only then GHC.setContext s [] [prelude_mod,modl]
+ else GHC.setContext s [modl] [])
+ unqual <- io (GHC.getPrintUnqual s)
+ io (GHC.setContext s as bs)
+
+ mb_mod_info <- io $ GHC.getModuleInfo s modl
+ case mb_mod_info of
+ Nothing -> throwDyn (CmdLineError ("unknown module: " ++ m))
+ Just mod_info -> do
+ let names
+ | exports_only = GHC.modInfoExports mod_info
+ | otherwise = fromMaybe [] (GHC.modInfoTopLevelScope mod_info)
+
+ filtered = filterOutChildren names
+
+ things <- io $ mapM (GHC.lookupName s) filtered
+
+ dflags <- getDynFlags
+ let exts = dopt Opt_GlasgowExts dflags
+ io (putStrLn (showSDocForUser unqual (
+ vcat (map (pprTyThingInContext exts) (catMaybes things))
+ )))
+ -- ToDo: modInfoInstances currently throws an exception for
+ -- package modules. When it works, we can do this:
+ -- $$ vcat (map GHC.pprInstance (GHC.modInfoInstances mod_info))
+
+-----------------------------------------------------------------------------
+-- Setting the module context
+
+setContext str
+ | all sensible mods = fn mods
+ | otherwise = throwDyn (CmdLineError "syntax: :module [+/-] [*]M1 ... [*]Mn")
+ where
+ (fn, mods) = case str of
+ '+':stuff -> (addToContext, words stuff)
+ '-':stuff -> (removeFromContext, words stuff)
+ stuff -> (newContext, words stuff)
+
+ sensible ('*':m) = looksLikeModuleName m
+ sensible m = looksLikeModuleName m
+
+newContext mods = do
+ session <- getSession
+ (as,bs) <- separate session mods [] []
+ let bs' = if null as && prelude_mod `notElem` bs then prelude_mod:bs else bs
+ io (GHC.setContext session as bs')
+
+separate :: Session -> [String] -> [Module] -> [Module]
+ -> GHCi ([Module],[Module])
+separate session [] as bs = return (as,bs)
+separate session (('*':m):ms) as bs = do
+ let modl = mkModule m
+ b <- io (GHC.moduleIsInterpreted session modl)
+ if b then separate session ms (modl:as) bs
+ else throwDyn (CmdLineError ("module '" ++ m ++ "' is not interpreted"))
+separate session (m:ms) as bs = separate session ms as (mkModule m:bs)
+
+prelude_mod = mkModule "Prelude"
+
+
+addToContext mods = do
+ cms <- getSession
+ (as,bs) <- io (GHC.getContext cms)
+
+ (as',bs') <- separate cms mods [] []
+
+ let as_to_add = as' \\ (as ++ bs)
+ bs_to_add = bs' \\ (as ++ bs)
+
+ io (GHC.setContext cms (as ++ as_to_add) (bs ++ bs_to_add))
+
+
+removeFromContext mods = do
+ cms <- getSession
+ (as,bs) <- io (GHC.getContext cms)
+
+ (as_to_remove,bs_to_remove) <- separate cms mods [] []
+
+ let as' = as \\ (as_to_remove ++ bs_to_remove)
+ bs' = bs \\ (as_to_remove ++ bs_to_remove)
+
+ io (GHC.setContext cms as' bs')
+
----------------------------------------------------------------------------
-- Code for `:set'
-- This is pretty fragile: most options won't work as expected. ToDo:
-- figure out which ones & disallow them.
-setOptions :: String -> GHCi ()
-setOptions ""
+setCmd :: String -> GHCi ()
+setCmd ""
= do st <- getGHCiState
let opts = options st
io $ putStrLn (showSDoc (
then text "none."
else hsep (map (\o -> char '+' <> text (optToStr o)) opts)
))
-setOptions str
- = do -- first, deal with the GHCi opts (+s, +t, etc.)
- let (plus_opts, minus_opts) = partition isPlus (words str)
- mapM setOpt plus_opts
+setCmd str
+ = case words str of
+ ("args":args) -> setArgs args
+ ("prog":prog) -> setProg prog
+ wds -> setOptions wds
- -- now, the GHC flags
- pkgs_before <- io (readIORef v_Packages)
- leftovers <- io (processArgs static_flags minus_opts [])
- pkgs_after <- io (readIORef v_Packages)
+setArgs args = do
+ st <- getGHCiState
+ setGHCiState st{ args = args }
- -- update things if the users wants more packages
- when (pkgs_before /= pkgs_after) $
- newPackages (pkgs_after \\ pkgs_before)
+setProg [prog] = do
+ st <- getGHCiState
+ setGHCiState st{ progname = prog }
+setProg _ = do
+ io (hPutStrLn stderr "syntax: :set prog <progname>")
- -- then, dynamic flags
- io $ do
- restoreDynFlags
- leftovers <- processArgs dynamic_flags leftovers []
- saveDynFlags
+setOptions wds =
+ do -- first, deal with the GHCi opts (+s, +t, etc.)
+ let (plus_opts, minus_opts) = partition isPlus wds
+ mapM_ setOpt plus_opts
- if (not (null leftovers))
+ -- then, dynamic flags
+ dflags <- getDynFlags
+ (dflags',leftovers) <- io $ GHC.parseDynamicFlags dflags minus_opts
+ setDynFlags dflags'
+
+ -- update things if the users wants more packages
+{- TODO:
+ let new_packages = pkgs_after \\ pkgs_before
+ when (not (null new_packages)) $
+ newPackages new_packages
+-}
+
+ if (not (null leftovers))
then throwDyn (CmdLineError ("unrecognised flags: " ++
unwords leftovers))
else return ()
(plus_opts, rest2) = partition isPlus rest1
if (not (null rest2))
- then io (putStrLn ("unknown option: `" ++ head rest2 ++ "'"))
+ then io (putStrLn ("unknown option: '" ++ head rest2 ++ "'"))
else do
- mapM unsetOpt plus_opts
+ mapM_ unsetOpt plus_opts
-- can't do GHC flags for now
if (not (null minus_opts))
setOpt ('+':str)
= case strToGHCiOpt str of
- Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+ Nothing -> io (putStrLn ("unknown option: '" ++ str ++ "'"))
Just o -> setOption o
unsetOpt ('+':str)
= case strToGHCiOpt str of
- Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+ Nothing -> io (putStrLn ("unknown option: '" ++ str ++ "'"))
Just o -> unsetOption o
strToGHCiOpt :: String -> (Maybe GHCiOption)
optToStr ShowType = "t"
optToStr RevertCAFs = "r"
-newPackages new_pkgs = do
- state <- getGHCiState
- dflags <- io getDynFlags
- cmstate1 <- io (cmUnload (cmstate state) dflags)
- setGHCiState state{ cmstate = cmstate1, targets = [] }
-
- io $ do
- pkgs <- getPackageInfo
- flushPackageCache pkgs
-
- new_pkg_info <- getPackageDetails new_pkgs
- mapM_ (linkPackage False) (reverse new_pkg_info)
+{- ToDo
+newPackages new_pkgs = do -- The new packages are already in v_Packages
+ session <- getSession
+ io (GHC.setTargets session [])
+ io (GHC.load session Nothing)
+ dflags <- getDynFlags
+ io (linkPackages dflags new_pkgs)
+ setContextAfterLoad []
+-}
+
+-- ---------------------------------------------------------------------------
+-- code for `:show'
+
+showCmd str =
+ case words str of
+ ["modules" ] -> showModules
+ ["bindings"] -> showBindings
+ ["linker"] -> io showLinkerState
+ _ -> throwDyn (CmdLineError "syntax: :show [modules|bindings]")
+
+showModules = do
+ session <- getSession
+ let show_one ms = do m <- io (GHC.showModule session ms)
+ io (putStrLn m)
+ graph <- io (GHC.getModuleGraph session)
+ mapM_ show_one graph
+
+showBindings = do
+ s <- getSession
+ unqual <- io (GHC.getPrintUnqual s)
+ bindings <- io (GHC.getBindings s)
+ mapM_ showTyThing bindings
+ return ()
+
+showTyThing (AnId id) = do
+ ty' <- cleanType (GHC.idType id)
+ str <- showForUser (ppr id <> text " :: " <> ppr ty')
+ io (putStrLn str)
+showTyThing _ = return ()
+
+-- if -fglasgow-exts is on we show the foralls, otherwise we don't.
+cleanType :: Type -> GHCi Type
+cleanType ty = do
+ dflags <- getDynFlags
+ if dopt Opt_GlasgowExts dflags
+ then return ty
+ else return $! GHC.dropForAlls ty
-----------------------------------------------------------------------------
-- GHCi monad
data GHCiState = GHCiState
{
- targets :: [FilePath],
- cmstate :: CmState,
+ progname :: String,
+ args :: [String],
+ session :: GHC.Session,
options :: [GHCiOption]
}
| RevertCAFs -- revert CAFs after every evaluation
deriving Eq
-GLOBAL_VAR(flush_stdout, error "no flush_stdout", IO ())
-GLOBAL_VAR(flush_stderr, error "no flush_stdout", IO ())
-
newtype GHCi a = GHCi { unGHCi :: IORef GHCiState -> IO a }
startGHCi :: GHCi a -> GHCiState -> IO a
(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
+-- for convenience...
+getSession = getGHCiState >>= return . session
+
+getDynFlags = do
+ s <- getSession
+ io (GHC.getSessionDynFlags s)
+setDynFlags dflags = do
+ s <- getSession
+ io (GHC.setSessionDynFlags s dflags)
+
isOptionSet :: GHCiOption -> GHCi Bool
isOptionSet opt
= do st <- getGHCiState
= 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
ghciHandle :: (Exception -> GHCi a) -> GHCi a -> GHCi a
ghciHandle h (GHCi m) = GHCi $ \s ->
Exception.catch (m s)
- (\e -> unGHCi (ghciHandle h (ghciUnblock (h e))) s)
+ (\e -> unGHCi (ghciUnblock (h e)) s)
ghciUnblock :: GHCi a -> GHCi a
ghciUnblock (GHCi a) = GHCi $ \s -> Exception.unblock (a s)
-----------------------------------------------------------------------------
--- package loader
-
--- 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
--- 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
-
-showLS (Left nm) = "(static) " ++ nm
-showLS (Right nm) = "(dynamic) " ++ nm
-
-linkPackages :: [LibrarySpec] -> [PackageConfig] -> IO ()
-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
- 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")
- Right dll_unadorned
- -> -- 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 ()
--- 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 ++ " ... ")
- -- 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
- let objs = hs_libraries pkg ++ extra_libraries pkg
- classifieds <- mapM (locateOneObj dirs) objs
-
- -- 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
-
- mapM loadClassified sos_first
- putStr "linking ... "
- resolveObjs
- putStrLn "done."
- where
- isRight (Right _) = True
- isRight (Left _) = False
-
-loadClassified :: LibrarySpec -> IO ()
-loadClassified (Left obj_absolute_filename)
- = do loadObj obj_absolute_filename
-loadClassified (Right 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 load .so/.DLL for: "
- ++ dll_unadorned ++ " (" ++ str ++ ")" ))
-
-locateOneObj :: [FilePath] -> String -> IO LibrarySpec
-locateOneObj [] obj
- = return (Right obj) -- we assume
-locateOneObj (d:ds) obj
- = do let path = d ++ '/':obj ++ ".o"
- b <- doesFileExist path
- if b then return (Left path) else locateOneObj ds obj
-
------------------------------------------------------------------------------
-- timing & statistics
timeIt :: GHCi a -> GHCi a
a <- action
allocs2 <- io $ getAllocations
time2 <- io $ getCPUTime
- io $ printTimes (allocs2 - allocs1) (time2 - time1)
+ io $ printTimes (fromIntegral (allocs2 - allocs1))
+ (time2 - time1)
return a
-foreign import "getAllocations" getAllocations :: IO Int
+foreign import ccall unsafe "getAllocations" getAllocations :: IO Int64
+ -- defined in ghc/rts/Stats.c
-printTimes :: Int -> Integer -> IO ()
+printTimes :: Integer -> Integer -> IO ()
printTimes allocs psecs
= do let secs = (fromIntegral psecs / (10^12)) :: Float
secs_str = showFFloat (Just 2) secs
putStrLn (showSDoc (
parens (text (secs_str "") <+> text "secs" <> comma <+>
- int allocs <+> text "bytes")))
+ text (show allocs) <+> text "bytes")))
-----------------------------------------------------------------------------
-- reverting CAFs
-foreign import revertCAFs :: IO () -- make it "safe", just in case
+revertCAFs :: IO ()
+revertCAFs = do
+ rts_revertCAFs
+ turnOffBuffering
+ -- Have to turn off buffering again, because we just
+ -- reverted stdout, stderr & stdin to their defaults.
+
+foreign import ccall "revertCAFs" rts_revertCAFs :: IO ()
+ -- Make it "safe", just in case
+
+-- -----------------------------------------------------------------------------
+-- Utils
+
+expandPath :: String -> GHCi String
+expandPath path =
+ case dropWhile isSpace path of
+ ('~':d) -> do
+ tilde <- io (getEnv "HOME") -- will fail if HOME not defined
+ return (tilde ++ '/':d)
+ other ->
+ return other
projects / ghc-hetmet.git / blobdiff