{-# OPTIONS -#include "Linker.h" #-}
-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.167 2004/07/21 09:25:42 simonpj Exp $
--
-- GHC Interactive User Interface
--
--- (c) The GHC Team 2004
+-- (c) The GHC Team 2005
--
-----------------------------------------------------------------------------
module InteractiveUI (
- interactiveUI, -- :: CmState -> [FilePath] -> IO ()
+ interactiveUI,
ghciWelcomeMsg
) where
-#include "../includes/config.h"
#include "HsVersions.h"
-import CompManager
-import HscTypes ( TyThing(..), HomeModInfo(hm_linkable), HomePackageTable,
- isObjectLinkable, GhciMode(..) )
-import IfaceSyn ( IfaceType, IfaceDecl(..), IfaceClassOp(..), IfaceConDecls(..), IfaceConDecl(..),
- pprIfaceDeclHead, pprParendIfaceType, pprIfaceForAllPart )
-import FunDeps ( pprFundeps )
-import DriverFlags
-import DriverState
-import DriverUtil ( remove_spaces )
-import Linker ( showLinkerState, linkPackages )
-import Util
-import Module ( showModMsg, lookupModuleEnv )
-import Name ( Name, isHomePackageName, nameSrcLoc, nameOccName,
- NamedThing(..) )
-import OccName ( OccName, isSymOcc, occNameUserString )
-import BasicTypes ( StrictnessMark(..), Fixity, defaultFixity, SuccessFlag(..) )
-import Packages
+-- The GHC interface
+import qualified GHC
+import GHC ( Session, verbosity, dopt, DynFlag(..), Target(..),
+ TargetId(..), DynFlags(..),
+ pprModule, Type, Module, SuccessFlag(..),
+ TyThing(..), Name, LoadHowMuch(..), Phase,
+ GhcException(..), showGhcException,
+ CheckedModule(..), SrcLoc )
+import DynFlags ( allFlags )
+import Packages ( PackageState(..) )
+import PackageConfig ( InstalledPackageInfo(..) )
+import UniqFM ( eltsUFM )
+import PprTyThing
import Outputable
-import CmdLineOpts ( DynFlag(..), DynFlags(..), getDynFlags, saveDynFlags,
- restoreDynFlags, dopt_unset )
-import Panic hiding ( showException )
+
+-- for createtags (should these come via GHC?)
+import Module ( moduleString )
+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 DriverUtil( handle )
import System.Posix
#if __GLASGOW_HASKELL__ > 504
hiding (getEnv)
#endif
+#else
+import GHC.ConsoleHandler ( flushConsole )
#endif
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
import Control.Concurrent ( yield ) -- Used in readline loop
import System.Console.Readline as Readline
#endif
import Control.Exception as Exception
import Data.Dynamic
-import Control.Concurrent
+-- import Control.Concurrent
import Numeric
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 as IO
+import System.IO
+import System.IO.Error as IO
import Data.Char
import Control.Monad as Monad
+import Foreign.StablePtr ( newStablePtr )
+import Text.Printf
import GHC.Exts ( unsafeCoerce# )
+import GHC.IOBase ( IOErrorType(InvalidArgument) )
import Data.IORef ( IORef, newIORef, readIORef, writeIORef )
-----------------------------------------------------------------------------
-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)])
+type Command = (String, String -> GHCi Bool, Bool, String -> IO [String])
+cmdName (n,_,_,_) = n
-builtin_commands :: [(String, String -> GHCi Bool)]
+GLOBAL_VAR(commands, builtin_commands, [Command])
+
+builtin_commands :: [Command]
builtin_commands = [
- ("add", keepGoingPaths addModule),
- ("browse", keepGoing browseCmd),
- ("cd", keepGoing changeDirectory),
- ("def", keepGoing defineMacro),
- ("help", keepGoing help),
- ("?", keepGoing help),
- ("info", keepGoing info),
- ("load", keepGoingPaths loadModule),
- ("module", keepGoing setContext),
- ("reload", keepGoing reloadModule),
- ("set", keepGoing setCmd),
- ("show", keepGoing showCmd),
- ("type", keepGoing typeOfExpr),
- ("kind", keepGoing kindOfType),
- ("unset", keepGoing unsetOptions),
- ("undef", keepGoing undefineMacro),
- ("quit", quit)
+ ("add", keepGoingPaths addModule, False, completeFilename),
+ ("browse", keepGoing browseCmd, False, completeModule),
+ ("cd", keepGoing changeDirectory, False, completeFilename),
+ ("def", keepGoing defineMacro, False, completeIdentifier),
+ ("help", keepGoing help, False, completeNone),
+ ("?", keepGoing help, False, completeNone),
+ ("info", keepGoing info, False, completeIdentifier),
+ ("load", keepGoingPaths loadModule_, False, completeHomeModuleOrFile),
+ ("module", keepGoing setContext, False, completeModule),
+ ("main", keepGoing runMain, False, completeIdentifier),
+ ("reload", keepGoing reloadModule, False, completeNone),
+ ("check", keepGoing checkModule, False, completeHomeModule),
+ ("set", keepGoing setCmd, True, completeSetOptions),
+ ("show", keepGoing showCmd, False, completeNone),
+ ("etags", keepGoing createETagsFileCmd, False, completeFilename),
+ ("ctags", keepGoing createCTagsFileCmd, False, completeFilename),
+ ("type", keepGoing typeOfExpr, False, completeIdentifier),
+ ("kind", keepGoing kindOfType, False, completeIdentifier),
+ ("unset", keepGoing unsetOptions, True, completeSetOptions),
+ ("undef", keepGoing undefineMacro, False, completeMacro),
+ ("quit", quit, False, completeNone)
]
keepGoing :: (String -> GHCi ()) -> (String -> GHCi Bool)
shortHelpText = "use :? for help.\n"
-- 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\
-\ :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 :: [FilePath] -> Maybe String -> IO ()
-interactiveUI srcs maybe_expr = do
- dflags <- getDynFlags
-
- cmstate <- cmInit Interactive dflags;
+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" ++
+ " :main [<arguments> ...] run the main function with the given arguments\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
-- Initialise buffering for the *interpreted* I/O system
- initInterpBuffering cmstate
+ initInterpBuffering session
-- We don't want the cmd line to buffer any input that might be
-- intended for the program, so unbuffer stdin.
hSetBuffering stdin NoBuffering
-- initial context is just the Prelude
- cmstate <- cmSetContext cmstate [] ["Prelude"]
+ GHC.setContext session [] [prelude_mod]
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
Readline.initialize
+ Readline.setAttemptedCompletionFunction (Just completeWord)
+ --Readline.parseAndBind "set show-all-if-ambiguous 1"
+
+ let symbols = "!#$%&*+/<=>?@\\^|-~"
+ specials = "(),;[]`{}"
+ spaces = " \t\n"
+ word_break_chars = spaces ++ specials ++ symbols
+
+ Readline.setBasicWordBreakCharacters word_break_chars
+ Readline.setCompleterWordBreakCharacters word_break_chars
#endif
- startGHCi (runGHCi srcs dflags maybe_expr)
+ startGHCi (runGHCi srcs maybe_expr)
GHCiState{ progname = "<interactive>",
args = [],
- targets = srcs,
- cmstate = cmstate,
+ session = session,
options = [] }
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
Readline.resetTerminal Nothing
#endif
return ()
-runGHCi :: [FilePath] -> DynFlags -> Maybe String -> GHCi ()
-runGHCi paths dflags maybe_expr = do
- read_dot_files <- io (readIORef v_Read_DotGHCi)
+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.
Right hdl -> fileLoop hdl False
-- Perform a :load for files given on the GHCi command line
- when (not (null paths)) $
- ghciHandle showException $
- loadModule paths
+ -- 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
- runCommand expr
+ runCommandEval expr
return ()
-- and finally, exit
io $ do when (verbosity dflags > 0) $ putStrLn "Leaving GHCi."
-interactiveLoop is_tty show_prompt = do
+interactiveLoop is_tty show_prompt =
-- Ignore ^C exceptions caught here
ghciHandleDyn (\e -> case e of
- Interrupted -> ghciUnblock (interactiveLoop is_tty show_prompt)
- _other -> return ()) $ do
+ Interrupted -> do
+#if defined(mingw32_HOST_OS)
+ io (putStrLn "")
+#endif
+ interactiveLoop is_tty show_prompt
+ _other -> return ()) $
+
+ ghciUnblock $ do -- unblock necessary if we recursed from the
+ -- exception handler above.
-- read commands from stdin
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
if (is_tty)
then readlineLoop
else fileLoop stdin show_prompt
#ifdef mingw32_HOST_OS
return True
#else
- DriverUtil.handle (\_ -> return False) $ do
+ Util.handle (\_ -> return False) $ do
st <- getFileStatus name
me <- getRealUserID
if fileOwner st /= me then do
fileLoop :: Handle -> Bool -> GHCi ()
fileLoop hdl prompt = do
- cmstate <- getCmState
- (mod,imports) <- io (cmGetContext cmstate)
+ 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 -> io (ioError 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
- case remove_spaces s of
+ case removeSpaces s of
"" -> stringLoop ss
l -> do quit <- runCommand l
if quit then return () else stringLoop ss
mkPrompt toplevs exports
- = concat (intersperse " " (map ('*':) toplevs ++ exports)) ++ "> "
+ = showSDoc (hsep (map (\m -> char '*' <> pprModule m) toplevs)
+ <+> hsep (map pprModule exports)
+ <> text "> ")
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
readlineLoop :: GHCi ()
readlineLoop = do
- cmstate <- getCmState
- (mod,imports) <- io (cmGetContext cmstate)
+ session <- getSession
+ (mod,imports) <- io (GHC.getContext session)
io yield
+ saveSession -- for use by completion
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
+ splatSavedSession
case l of
Nothing -> return ()
Just l ->
- case remove_spaces l of
+ case removeSpaces l of
"" -> readlineLoop
l -> do
io (addHistory l)
runCommand :: String -> GHCi Bool
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
showException other_exception
= io (putStrLn ("*** Exception: " ++ show other_exception))
-doCommand (':' : command) = specialCommand command
-doCommand stmt
- = do timeIt (do nms <- runStmt stmt; finishEvalExpr nms)
- return False
-
-runStmt :: String -> GHCi [Name]
+runStmt :: String -> GHCi (Maybe [Name])
runStmt stmt
- | null (filter (not.isSpace) stmt) = return []
+ | null (filter (not.isSpace) stmt) = return (Just [])
| otherwise
= do st <- getGHCiState
- dflags <- io getDynFlags
- let cm_state' = cmSetDFlags (cmstate st)
- (dopt_unset dflags Opt_WarnUnusedBinds)
- (new_cmstate, result) <-
- io $ withProgName (progname st) $ withArgs (args st) $
- cmRunStmt cm_state' stmt
- setGHCiState st{cmstate = new_cmstate}
+ session <- getSession
+ result <- io $ withProgName (progname st) $ withArgs (args st) $
+ GHC.runStmt session stmt
case result of
- CmRunFailed -> return []
- CmRunException e -> showException e >> return []
- CmRunOk names -> return names
+ 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 names
+finishEvalExpr mb_names
= do b <- isOptionSet ShowType
- cmstate <- getCmState
- when b (mapM_ (showTypeOfName cmstate) names)
+ session <- getSession
+ case mb_names of
+ Nothing -> return ()
+ Just names -> when b (mapM_ (showTypeOfName session) names)
flushInterpBuffers
io installSignalHandlers
io (when b revertCAFs)
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))
+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)
specialCommand str = do
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"
+ maybe_cmd <- io (lookupCommand cmd)
+ case maybe_cmd of
+ Nothing -> io (hPutStr stdout ("unknown command ':" ++ cmd ++ "'\n"
++ shortHelpText) >> return False)
- [(_,f)] -> f (dropWhile isSpace rest)
- cs -> io (hPutStrLn stdout ("prefix " ++ cmd ++
- " matches multiple commands (" ++
- foldr1 (\a b -> a ++ ',':b) (map fst cs)
- ++ ")") >> return False)
-
-noArgs c = throwDyn (CmdLineError ("command `" ++ c ++ "' takes no arguments"))
-
+ Just (_,f,_,_) -> f (dropWhile isSpace rest)
+
+lookupCommand :: String -> IO (Maybe Command)
+lookupCommand str = do
+ cmds <- readIORef commands
+ -- look for exact match first, then the first prefix match
+ case [ c | c <- cmds, str == cmdName c ] of
+ c:_ -> return (Just c)
+ [] -> case [ c | c@(s,_,_,_) <- cmds, prefixMatch str s ] of
+ [] -> return Nothing
+ c:_ -> return (Just c)
-----------------------------------------------------------------------------
-- To flush buffers for the *interpreted* computation we need
GLOBAL_VAR(flush_interp, error "no flush_interp", IO ())
GLOBAL_VAR(turn_off_buffering, error "no flush_stdout", IO ())
-no_buf_cmd = "IO.hSetBuffering IO.stdout IO.NoBuffering" ++
- " Prelude.>> IO.hSetBuffering IO.stderr IO.NoBuffering"
-flush_cmd = "IO.hFlush IO.stdout Prelude.>> IO.hFlush IO.stderr"
+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 :: CmState -> IO ()
-initInterpBuffering cmstate
- = do maybe_hval <- cmCompileExpr cmstate no_buf_cmd
+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 <- cmCompileExpr cmstate flush_cmd
+ maybe_hval <- GHC.compileExpr session flush_cmd
case maybe_hval of
Just hval -> writeIORef flush_interp (unsafeCoerce# hval :: IO ())
_ -> panic "interactiveUI:flush"
help _ = io (putStr helpText)
info :: String -> GHCi ()
-info "" = throwDyn (CmdLineError "syntax: `:i <thing-you-want-info-about>'")
+info "" = throwDyn (CmdLineError "syntax: ':i <thing-you-want-info-about>'")
info s = do { let names = words s
- ; init_cms <- getCmState
- ; mapM_ (infoThing init_cms) names }
+ ; session <- getSession
+ ; dflags <- getDynFlags
+ ; let exts = dopt Opt_GlasgowExts dflags
+ ; mapM_ (infoThing exts session) names }
where
- infoThing cms name
- = do { stuff <- io (cmInfoThing cms name)
- ; io (putStrLn (showSDocForUser (cmGetPrintUnqual cms) $
- vcat (intersperse (text "") (map (showThing name) stuff)))) }
-
-showThing :: String -> (IfaceDecl, Fixity) -> SDoc
-showThing name (thing, fixity)
- = vcat [ showDecl (\occ -> name == occNameUserString occ) thing,
- showFixity fixity ]
+ 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
- showFixity fix
- | fix == defaultFixity = empty
- | otherwise = ppr fix <+> text name
-
--- Now there is rather a lot of goop just to print declarations in a civilised way
--- with "..." for the parts we are less interested in.
-
-showDecl :: (OccName -> Bool) -> IfaceDecl -> SDoc
-showDecl want_name (IfaceId {ifName = var, ifType = ty})
- = ppr var <+> dcolon <+> ppr ty
-
-showDecl want_name (IfaceSyn {ifName = tycon, ifTyVars = tyvars, ifSynRhs = mono_ty})
- = hang (ptext SLIT("type") <+> pprIfaceDeclHead [] tycon tyvars)
- 2 (equals <+> ppr mono_ty)
-
-showDecl want_name (IfaceData {ifCtxt = context, ifName = tycon,
- ifTyVars = tyvars, ifCons = condecls})
- = hang (pp_nd <+> pprIfaceDeclHead context tycon tyvars)
- 2 (add_bars (ppr_trim show_con cs))
- where
- show_con (IfaceConDecl con_name is_infix ex_tvs ex_cxt tys strs flds)
- | want_name tycon || want_name con_name || any want_name flds
- = Just (pprIfaceForAllPart ex_tvs ex_cxt (show_guts con_name is_infix tys_w_strs flds))
- | otherwise = Nothing
- where
- tys_w_strs = tys `zip` (strs ++ repeat NotMarkedStrict)
-
- show_guts con True [ty1, ty2] flds = sep [ppr_bangty ty1, ppr con, ppr_bangty ty2]
- show_guts con _ tys [] = ppr_bndr con <+> sep (map ppr_bangty tys)
- show_guts con _ tys flds
- = ppr_bndr con <+> braces (sep (punctuate comma (ppr_trim show_fld (tys `zip` flds))))
- where
- show_fld (bty, fld) | want_name tycon || want_name con || want_name fld
- = Just (ppr_bndr fld <+> dcolon <+> ppr_bangty bty)
- | otherwise = Nothing
-
- (pp_nd, cs) = case condecls of
- IfAbstractTyCon -> (ptext SLIT("data"), [])
- IfDataTyCon cs -> (ptext SLIT("data"), cs)
- IfNewTyCon c -> (ptext SLIT("newtype"), [c])
-
- add_bars [] = empty
- add_bars [c] = equals <+> c
- add_bars (c:cs) = equals <+> sep (c : map (char '|' <+>) cs)
-
- ppr_bangty (ty, str) = ppr_str str <> pprParendIfaceType ty
- ppr_str MarkedStrict = char '!'
- ppr_str MarkedUnboxed = ptext SLIT("!!")
- ppr_str NotMarkedStrict = empty
-
-showDecl want_name (IfaceClass {ifCtxt = context, ifName = clas, ifTyVars = tyvars,
- ifFDs = fds, ifSigs = sigs})
- = hang (ptext SLIT("class") <+> pprIfaceDeclHead context clas tyvars
- <+> pprFundeps fds <+> ptext SLIT("where"))
- 2 (vcat (ppr_trim show_op sigs))
- where
- show_op (IfaceClassOp op dm ty)
- | want_name clas || want_name op = Just (ppr_bndr op <+> dcolon <+> ppr ty)
- | otherwise = Nothing
-
-ppr_trim :: (a -> Maybe SDoc) -> [a] -> [SDoc]
-ppr_trim show xs
- = snd (foldr go (False, []) xs)
- where
- go x (eliding, so_far)
- | Just doc <- show x = (False, doc : so_far)
- | otherwise = if eliding then (True, so_far)
- else (True, ptext SLIT("...") : so_far)
-
-ppr_bndr :: OccName -> SDoc
--- Wrap operators in ()
-ppr_bndr occ | isSymOcc occ = parens (ppr occ)
- | otherwise = ppr occ
-
-{-
- -- 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
--}
-
+ show_fixity fix
+ | fix == GHC.defaultFixity = empty
+ | otherwise = ppr fix <+> ppr (GHC.getName thing)
-----------------------------------------------------------------------------
-- Commands
+runMain :: String -> GHCi ()
+runMain args = do
+ let ss = concat $ intersperse "," (map (\ s -> ('"':s)++"\"") (toArgs args))
+ runCommand $ '[': ss ++ "] `System.Environment.withArgs` main"
+ return ()
+
addModule :: [FilePath] -> GHCi ()
addModule files = do
- state <- getGHCiState
io (revertCAFs) -- always revert CAFs on load/add.
files <- mapM expandPath files
- let new_targets = files ++ targets state
- graph <- io (cmDepAnal (cmstate state) new_targets)
- (cmstate1, ok, mods) <- io (cmLoadModules (cmstate state) graph)
- setGHCiState state{ cmstate = cmstate1, targets = new_targets }
- setContextAfterLoad mods
- dflags <- io getDynFlags
- modulesLoadedMsg ok mods dflags
+ 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 dir = do
- state <- getGHCiState
- when (targets state /= []) $
- io $ putStr "Warning: changing directory causes all loaded modules to be unloaded, \n\
- \because the search path has changed.\n"
- cmstate1 <- io (cmUnload (cmstate state))
- setGHCiState state{ cmstate = cmstate1, targets = [] }
- setContextAfterLoad []
+ 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)
if (null macro_name)
then throwDyn (CmdLineError "invalid macro name")
else do
- if (macro_name `elem` map fst cmds)
+ if (macro_name `elem` map cmdName 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
- cms <- getCmState
- maybe_hv <- io (cmCompileExpr cms new_expr)
+ 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))
+ (cmds ++ [(macro_name, keepGoing (runMacro hv), False, completeNone)]))
-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)
undefineMacro :: String -> GHCi ()
undefineMacro macro_name = do
cmds <- io (readIORef commands)
- if (macro_name `elem` map fst builtin_commands)
+ if (macro_name `elem` map cmdName 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)
+ if (macro_name `notElem` map cmdName cmds)
then throwDyn (CmdLineError
- ("command `" ++ macro_name ++ "' not defined"))
+ ("command '" ++ macro_name ++ "' not defined"))
else do
- io (writeIORef commands (filter ((/= macro_name) . fst) cmds))
+ io (writeIORef commands (filter ((/= macro_name) . cmdName) cmds))
-loadModule :: [FilePath] -> GHCi ()
+loadModule :: [(FilePath, Maybe Phase)] -> GHCi SuccessFlag
loadModule fs = timeIt (loadModule' fs)
-loadModule' :: [FilePath] -> GHCi ()
-loadModule' files = do
- state <- getGHCiState
-
- -- expand tildes
- files <- mapM expandPath files
-
- -- do the dependency anal first, so that if it fails we don't throw
- -- away the current set of modules.
- graph <- io (cmDepAnal (cmstate state) files)
+loadModule_ :: [FilePath] -> GHCi ()
+loadModule_ fs = do loadModule (zip fs (repeat Nothing)); return ()
- -- Dependency anal ok, now unload everything
- cmstate1 <- io (cmUnload (cmstate state))
- setGHCiState state{ cmstate = cmstate1, targets = [] }
-
- io (revertCAFs) -- always revert CAFs on load.
- (cmstate2, ok, mods) <- io (cmLoadModules cmstate1 graph)
- setGHCiState state{ cmstate = cmstate2, targets = files }
+loadModule' :: [(FilePath, Maybe Phase)] -> GHCi SuccessFlag
+loadModule' files = do
+ session <- getSession
- setContextAfterLoad mods
- dflags <- io (getDynFlags)
- modulesLoadedMsg ok mods dflags
+ -- 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 = GHC.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
- -- do the dependency anal first, so that if it fails we don't throw
- -- away the current set of modules.
- graph <- io (cmDepAnal (cmstate state) paths)
-
- io (revertCAFs) -- always revert CAFs on reload.
- (cmstate1, ok, mods)
- <- io (cmLoadModules (cmstate state) graph)
- setGHCiState state{ cmstate=cmstate1 }
- setContextAfterLoad mods
- dflags <- io getDynFlags
- modulesLoadedMsg ok mods dflags
-
-reloadModule _ = noArgs ":reload"
-
-setContextAfterLoad [] = setContext prel
-setContextAfterLoad (m:_) = do
- cmstate <- getCmState
- b <- io (cmModuleIsInterpreted cmstate m)
- if b then setContext ('*':m) else setContext m
-
-modulesLoadedMsg ok mods dflags =
+ 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 (GHC.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
+ dflags <- getDynFlags
when (verbosity dflags > 0) $ do
let mod_commas
| null mods = text "none."
| otherwise = hsep (
- punctuate comma (map text mods)) <> text "."
+ punctuate comma (map pprModule mods)) <> text "."
case ok of
Failed ->
io (putStrLn (showSDoc (text "Failed, modules loaded: " <> mod_commas)))
typeOfExpr :: String -> GHCi ()
typeOfExpr str
- = do cms <- getCmState
- maybe_tystr <- io (cmTypeOfExpr cms str)
- case maybe_tystr of
- Nothing -> return ()
- Just tystr -> io (putStrLn tystr)
+ = 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 <- getCmState
- maybe_tystr <- io (cmKindOfType cms str)
- case maybe_tystr of
+ = 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 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 '" ++ moduleString 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 ()
_ -> throwDyn (CmdLineError "syntax: :browse <module>")
browseModule m exports_only = do
- cms <- getCmState
+ s <- getSession
- is_interpreted <- io (cmModuleIsInterpreted cms m)
+ let modl = GHC.mkModule m
+ is_interpreted <- io (GHC.moduleIsInterpreted s modl)
when (not is_interpreted && not exports_only) $
- throwDyn (CmdLineError ("module `" ++ m ++ "' is not interpreted"))
+ 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 (cmGetContext cms)
- cms1 <- io (if exports_only then cmSetContext cms [] [prel,m]
- else cmSetContext cms [m] [])
- cms2 <- io (cmSetContext cms1 as bs)
-
- things <- io (cmBrowseModule cms2 m exports_only)
-
- let unqual = cmGetPrintUnqual cms1 -- NOTE: cms1 with the new context
+ (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
- io (putStrLn (showSDocForUser unqual (
- vcat (map (showDecl (const True)) things)
- )))
+ 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
sensible m = looksLikeModuleName m
newContext mods = do
- cms <- getCmState
- (as,bs) <- separate cms mods [] []
- let bs' = if null as && prel `notElem` bs then prel:bs else bs
- cms' <- io (cmSetContext cms as bs')
- setCmState cms'
+ 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 cmstate [] as bs = return (as,bs)
-separate cmstate (('*':m):ms) as bs = do
- b <- io (cmModuleIsInterpreted cmstate m)
- if b then separate cmstate ms (m:as) bs
- else throwDyn (CmdLineError ("module `" ++ m ++ "' is not interpreted"))
-separate cmstate (m:ms) as bs = separate cmstate ms as (m: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 = GHC.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 (GHC.mkModule m:bs)
-prel = "Prelude"
+prelude_mod = GHC.mkModule "Prelude"
addToContext mods = do
- cms <- getCmState
- (as,bs) <- io (cmGetContext cms)
+ 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)
- cms' <- io (cmSetContext cms
- (as ++ as_to_add) (bs ++ bs_to_add))
- setCmState cms'
+ io (GHC.setContext cms (as ++ as_to_add) (bs ++ bs_to_add))
removeFromContext mods = do
- cms <- getCmState
- (as,bs) <- io (cmGetContext cms)
+ 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)
- cms' <- io (cmSetContext cms as' bs')
- setCmState cms'
+ io (GHC.setContext cms as' bs')
----------------------------------------------------------------------------
-- Code for `:set'
let (plus_opts, minus_opts) = partition isPlus wds
mapM_ setOpt plus_opts
- -- now, the GHC flags
- pkgs_before <- io (readIORef v_ExplicitPackages)
- leftovers <- io (processArgs static_flags minus_opts [])
- pkgs_after <- io (readIORef v_ExplicitPackages)
-
- -- update things if the users wants more packages
- let new_packages = pkgs_after \\ pkgs_before
- when (not (null new_packages)) $
- newPackages new_packages
-
- -- don't forget about the extra command-line flags from the
- -- extra_ghc_opts fields in the new packages
- new_package_details <- io (getPackageDetails new_packages)
- let pkg_extra_opts = concatMap extra_ghc_opts new_package_details
- pkg_extra_dyn <- io (processArgs static_flags pkg_extra_opts [])
-
-- then, dynamic flags
- io $ do
- restoreDynFlags
- leftovers <- processArgs dynamic_flags (leftovers ++ pkg_extra_dyn) []
- saveDynFlags
+ 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))
+ 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
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"
+{- ToDo
newPackages new_pkgs = do -- The new packages are already in v_Packages
- state <- getGHCiState
- cmstate1 <- io (cmUnload (cmstate state))
- setGHCiState state{ cmstate = cmstate1, targets = [] }
- dflags <- io getDynFlags
+ session <- getSession
+ io (GHC.setTargets session [])
+ io (GHC.load session Nothing)
+ dflags <- getDynFlags
io (linkPackages dflags new_pkgs)
setContextAfterLoad []
+-}
-- ---------------------------------------------------------------------------
-- code for `:show'
_ -> throwDyn (CmdLineError "syntax: :show [modules|bindings]")
showModules = do
- cms <- getCmState
- let (mg, hpt) = cmGetModInfo cms
- mapM_ (showModule hpt) mg
-
-
-showModule :: HomePackageTable -> ModSummary -> GHCi ()
-showModule hpt mod_summary
- = case lookupModuleEnv hpt mod of
- Nothing -> panic "missing linkable"
- Just mod_info -> io (putStrLn (showModMsg obj_linkable mod locn))
- where
- obj_linkable = isObjectLinkable (hm_linkable mod_info)
- where
- mod = ms_mod mod_summary
- locn = ms_location mod_summary
+ 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
- cms <- getCmState
- let
- unqual = cmGetPrintUnqual cms
--- showBinding b = putStrLn (showSDocForUser unqual (ppr (ifaceTyThing b)))
- showBinding b = putStrLn (showSDocForUser unqual (ppr (getName b)))
-
- io (mapM_ showBinding (cmGetBindings cms))
+ 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
+
+-- -----------------------------------------------------------------------------
+-- Completion
+
+completeNone :: String -> IO [String]
+completeNone w = return []
+
+#ifdef USE_READLINE
+completeWord :: String -> Int -> Int -> IO (Maybe (String, [String]))
+completeWord w start end = do
+ line <- Readline.getLineBuffer
+ case w of
+ ':':_ | all isSpace (take (start-1) line) -> wrapCompleter completeCmd w
+ _other
+ | Just c <- is_cmd line -> do
+ maybe_cmd <- lookupCommand c
+ let (n,w') = selectWord (words' 0 line)
+ case maybe_cmd of
+ Nothing -> return Nothing
+ Just (_,_,False,complete) -> wrapCompleter complete w
+ Just (_,_,True,complete) -> let complete' w = do rets <- complete w
+ return (map (drop n) rets)
+ in wrapCompleter complete' w'
+ | otherwise -> do
+ --printf "complete %s, start = %d, end = %d\n" w start end
+ wrapCompleter completeIdentifier w
+ where words' _ [] = []
+ words' n str = let (w,r) = break isSpace str
+ (s,r') = span isSpace r
+ in (n,w):words' (n+length w+length s) r'
+ -- In a Haskell expression we want to parse 'a-b' as three words
+ -- where a compiler flag (ie. -fno-monomorphism-restriction) should
+ -- only be a single word.
+ selectWord [] = (0,w)
+ selectWord ((offset,x):xs)
+ | offset+length x >= start = (start-offset,take (end-offset) x)
+ | otherwise = selectWord xs
+
+is_cmd line
+ | ((':':w) : _) <- words (dropWhile isSpace line) = Just w
+ | otherwise = Nothing
+
+completeCmd w = do
+ cmds <- readIORef commands
+ return (filter (w `isPrefixOf`) (map (':':) (map cmdName cmds)))
+
+completeMacro w = do
+ cmds <- readIORef commands
+ let cmds' = [ cmd | cmd <- map cmdName cmds, cmd `elem` map cmdName builtin_commands ]
+ return (filter (w `isPrefixOf`) cmds')
+
+completeIdentifier w = do
+ s <- restoreSession
+ rdrs <- GHC.getRdrNamesInScope s
+ return (filter (w `isPrefixOf`) (map (showSDoc.ppr) rdrs))
+
+completeModule w = do
+ s <- restoreSession
+ dflags <- GHC.getSessionDynFlags s
+ let pkg_mods = allExposedModules dflags
+ return (filter (w `isPrefixOf`) (map (showSDoc.ppr) pkg_mods))
+
+completeHomeModule w = do
+ s <- restoreSession
+ g <- GHC.getModuleGraph s
+ let home_mods = map GHC.ms_mod g
+ return (filter (w `isPrefixOf`) (map (showSDoc.ppr) home_mods))
+
+completeSetOptions w = do
+ return (filter (w `isPrefixOf`) options)
+ where options = "args":"prog":allFlags
+
+completeFilename = Readline.filenameCompletionFunction
+
+completeHomeModuleOrFile = unionComplete completeHomeModule completeFilename
+
+unionComplete :: (String -> IO [String]) -> (String -> IO [String]) -> String -> IO [String]
+unionComplete f1 f2 w = do
+ s1 <- f1 w
+ s2 <- f2 w
+ return (s1 ++ s2)
+
+wrapCompleter :: (String -> IO [String]) -> String -> IO (Maybe (String,[String]))
+wrapCompleter fun w = do
+ strs <- fun w
+ case strs of
+ [] -> return Nothing
+ [x] -> return (Just (x,[]))
+ xs -> case getCommonPrefix xs of
+ "" -> return (Just ("",xs))
+ pref -> return (Just (pref,xs))
+
+getCommonPrefix :: [String] -> String
+getCommonPrefix [] = ""
+getCommonPrefix (s:ss) = foldl common s ss
+ where common s "" = s
+ common "" s = ""
+ common (c:cs) (d:ds)
+ | c == d = c : common cs ds
+ | otherwise = ""
+
+allExposedModules :: DynFlags -> [Module]
+allExposedModules dflags
+ = map GHC.mkModule (concat (map exposedModules (filter exposed (eltsUFM pkg_db))))
+ where
+ pkg_db = pkgIdMap (pkgState dflags)
+#else
+completeCmd = completeNone
+completeMacro = completeNone
+completeIdentifier = completeNone
+completeModule = completeNone
+completeHomeModule = completeNone
+completeSetOptions = completeNone
+completeFilename = completeNone
+completeHomeModuleOrFile=completeNone
+#endif
-----------------------------------------------------------------------------
-- GHCi monad
{
progname :: String,
args :: [String],
- targets :: [FilePath],
- cmstate :: CmState,
+ session :: GHC.Session,
options :: [GHCiOption]
}
setGHCiState s = GHCi $ \r -> writeIORef r s
-- for convenience...
-getCmState = getGHCiState >>= return . cmstate
-setCmState cms = do s <- getGHCiState; setGHCiState s{cmstate=cms}
+getSession = getGHCiState >>= return . session
+
+GLOBAL_VAR(saved_sess, no_saved_sess, Session)
+no_saved_sess = error "no saved_ses"
+saveSession = getSession >>= io . writeIORef saved_sess
+splatSavedSession = io (writeIORef saved_sess no_saved_sess)
+restoreSession = readIORef saved_sess
+
+getDynFlags = do
+ s <- getSession
+ io (GHC.getSessionDynFlags s)
+setDynFlags dflags = do
+ s <- getSession
+ io (GHC.setSessionDynFlags s dflags)
isOptionSet :: GHCiOption -> GHCi Bool
isOptionSet opt
projects / ghc-hetmet.git / blobdiff