-- (c) The GHC Team 2005-2006
--
-----------------------------------------------------------------------------
-{-# OPTIONS -w #-}
--- The above warning supression flag is a temporary kludge.
--- While working on this module you are encouraged to remove it and fix
--- any warnings in the module. See
--- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
--- for details
module InteractiveUI ( interactiveUI, ghciWelcomeMsg ) where
-- The GHC interface
import qualified GHC
import GHC ( Session, LoadHowMuch(..), Target(..), TargetId(..),
- Type, Module, ModuleName, TyThing(..), Phase,
+ Module, ModuleName, TyThing(..), Phase,
BreakIndex, SrcSpan, Resume, SingleStep )
import PprTyThing
import DynFlags
": http://www.haskell.org/ghc/ :? for help"
type Command = (String, String -> GHCi Bool, Bool, String -> IO [String])
+
+cmdName :: Command -> String
cmdName (n,_,_,_) = n
+commands :: IORef [Command]
GLOBAL_VAR(commands, builtin_commands, [Command])
builtin_commands :: [Command]
keepGoingPaths :: ([FilePath] -> GHCi ()) -> (String -> GHCi Bool)
keepGoingPaths a str = a (toArgs str) >> return False
+shortHelpText :: String
shortHelpText = "use :? for help.\n"
+helpText :: String
helpText =
" Commands available from the prompt:\n" ++
"\n" ++
" :show <setting> show anything that can be set with :set (e.g. args)\n" ++
"\n"
+findEditor :: IO String
findEditor = do
getEnv "EDITOR"
`IO.catch` \_ -> do
hSetBuffering stdin NoBuffering
-- initial context is just the Prelude
- prel_mod <- GHC.findModule session prel_name (Just basePackageId)
+ prel_mod <- GHC.findModule session (GHC.mkModuleName "Prelude")
+ (Just basePackageId)
GHC.setContext session [] [prel_mod]
#ifdef USE_READLINE
return ()
-prel_name = GHC.mkModuleName "Prelude"
-
runGHCi :: [(FilePath, Maybe Phase)] -> Maybe String -> GHCi ()
runGHCi paths maybe_expr = do
let read_dot_files = not opt_IgnoreDotGhci
when (dir_ok && file_ok) $ do
either_hdl <- io (IO.try (openFile "./.ghci" ReadMode))
case either_hdl of
- Left e -> return ()
+ 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 ()
+ Left _e -> return ()
Right dir -> do
cwd <- io (getCurrentDirectory)
when (dir /= cwd) $ do
when ok $ do
either_hdl <- io (IO.try (openFile file ReadMode))
case either_hdl of
- Left e -> return ()
+ Left _e -> return ()
Right hdl -> fileLoop hdl False
-- Perform a :load for files given on the GHCi command line
io $ do when (verbosity dflags > 0) $ putStrLn "Leaving GHCi."
+interactiveLoop :: Bool -> Bool -> GHCi ()
interactiveLoop is_tty show_prompt =
-- Ignore ^C exceptions caught here
ghciHandleDyn (\e -> case e of
l -> do quit <- runCommands l
if quit then return () else fileLoop hdl show_prompt
+mkPrompt :: GHCi String
mkPrompt = do
session <- getSession
(toplevs,exports) <- io (GHC.getContext session)
context_bit <-
case resumes of
[] -> return empty
- r:rs -> do
+ r:_ -> do
let ix = GHC.resumeHistoryIx r
if ix == 0
then return (brackets (ppr (GHC.resumeSpan r)) <> space)
return (brackets (ppr (negate ix) <> char ':'
<+> ppr span) <> space)
let
- dots | r:rs <- resumes, not (null rs) = text "... "
+ dots | _:rs <- resumes, not (null rs) = text "... "
| otherwise = empty
modules_bit =
#ifdef USE_READLINE
readlineLoop :: GHCi ()
readlineLoop = do
- session <- getSession
- (mod,imports) <- io (GHC.getContext session)
io yield
saveSession -- for use by completion
- st <- getGHCiState
- mb_span <- getCurrentBreakSpan
prompt <- mkPrompt
l <- io (readline prompt `finally` setNonBlockingFD 0)
-- readline sometimes puts stdin into blocking mode,
-- 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 :: String -> GHCi Bool
runCommandEval c = ghciHandle handleEval (doCommand c)
where
handleEval (ExitException code) = io (exitWith code)
--afterRunStmt :: GHC.RunResult -> GHCi Bool
-- False <=> the statement failed to compile
+afterRunStmt :: (SrcSpan -> Bool) -> GHC.RunResult -> GHCi Bool
afterRunStmt _ (GHC.RunException e) = throw e
afterRunStmt step_here run_result = do
session <- getSession
let mod = GHC.breakInfo_module info
nm = GHC.breakInfo_number info
st <- getGHCiState
- case [ loc | (i,loc) <- breaks st,
+ case [ loc | (_,loc) <- breaks st,
breakModule loc == mod, breakTick loc == nm ] of
[] -> return ()
loc:_ | null cmd -> return ()
resumes <- io $ GHC.getResumeContext session
case resumes of
[] -> return Nothing
- (r:rs) -> do
+ (r:_) -> do
let ix = GHC.resumeHistoryIx r
if ix == 0
then return (Just (GHC.resumeSpan r))
resumes <- io $ GHC.getResumeContext session
case resumes of
[] -> return Nothing
- (r:rs) -> do
+ (r:_) -> do
let ix = GHC.resumeHistoryIx r
if ix == 0
then return (GHC.breakInfo_module `liftM` GHC.resumeBreakInfo r)
noArgs :: GHCi () -> String -> GHCi ()
noArgs m "" = m
-noArgs m _ = io $ putStrLn "This command takes no arguments"
+noArgs _ _ = io $ putStrLn "This command takes no arguments"
help :: String -> GHCi ()
help _ = io (putStr helpText)
infoThing pefas session str = io $ do
names <- GHC.parseName session str
mb_stuffs <- mapM (GHC.getInfo session) names
- let filtered = filterOutChildren (\(t,f,i) -> t) (catMaybes mb_stuffs)
+ let filtered = filterOutChildren (\(t,_f,_i) -> t) (catMaybes mb_stuffs)
unqual <- GHC.getPrintUnqual session
putStrLn (showSDocForUser unqual $
vcat (intersperse (text "") $
else LoadUpTo (GHC.mkModuleName m)
return ()
+doLoad :: Session -> LoadHowMuch -> GHCi SuccessFlag
doLoad session howmuch = do
-- turn off breakpoints before we load: we can't turn them off later, because
-- the ModBreaks will have gone away.
afterLoad ok session
return ok
+afterLoad :: SuccessFlag -> Session -> GHCi ()
afterLoad ok session = do
io (revertCAFs) -- always revert CAFs on load.
discardTickArrays
setContextAfterLoad session loaded_mods
modulesLoadedMsg ok (map GHC.ms_mod_name loaded_mods)
+setContextAfterLoad :: Session -> [GHC.ModSummary] -> GHCi ()
setContextAfterLoad session [] = do
prel_mod <- getPrelude
io (GHC.setContext session [] [prel_mod])
= GHC.ms_mod_name summary == m
summary `matches` Target (TargetFile f _) _
| Just f' <- GHC.ml_hs_file (GHC.ms_location summary) = f == f'
- summary `matches` target
+ _ `matches` _
= False
load_this summary | m <- GHC.ms_mod summary = do
[m] | looksLikeModuleName m -> browseModule m True
_ -> throwDyn (CmdLineError "syntax: :browse <module>")
+browseModule :: String -> Bool -> GHCi ()
browseModule m exports_only = do
s <- getSession
modl <- if exports_only then lookupModule m
-----------------------------------------------------------------------------
-- Setting the module context
+setContext :: String -> GHCi ()
setContext str
| all sensible mods = fn mods
| otherwise = throwDyn (CmdLineError "syntax: :module [+/-] [*]M1 ... [*]Mn")
separate :: Session -> [String] -> [Module] -> [Module]
-> GHCi ([Module],[Module])
-separate session [] as bs = return (as,bs)
+separate _ [] as bs = return (as,bs)
separate session (('*':str):ms) as bs = do
m <- io $ GHC.findModule session (GHC.mkModuleName str) Nothing
b <- io $ GHC.moduleIsInterpreted session m
= case toArgs str of
("args":args) -> setArgs args
("prog":prog) -> setProg prog
- ("prompt":prompt) -> setPrompt (after 6)
- ("editor":cmd) -> setEditor (after 6)
- ("stop":cmd) -> setStop (after 4)
+ ("prompt":_) -> setPrompt (after 6)
+ ("editor":_) -> setEditor (after 6)
+ ("stop":_) -> setStop (after 4)
wds -> setOptions wds
where after n = dropWhile isSpace $ drop n $ dropWhile isSpace str
+setArgs, setProg, setOptions :: [String] -> GHCi ()
+setEditor, setStop, setPrompt :: String -> GHCi ()
+
setArgs args = do
st <- getGHCiState
setGHCiState st{ args = args }
setOptions wds =
do -- first, deal with the GHCi opts (+s, +t, etc.)
- let (plus_opts, minus_opts) = partition isPlus wds
+ let (plus_opts, minus_opts) = partitionWith isPlus wds
mapM_ setOpt plus_opts
-- then, dynamic flags
newDynFlags minus_opts
+newDynFlags :: [String] -> GHCi ()
newDynFlags minus_opts = do
dflags <- getDynFlags
let pkg_flags = packageFlags dflags
= do -- first, deal with the GHCi opts (+s, +t, etc.)
let opts = words str
(minus_opts, rest1) = partition isMinus opts
- (plus_opts, rest2) = partition isPlus rest1
+ (plus_opts, rest2) = partitionWith isPlus rest1
if (not (null rest2))
then io (putStrLn ("unknown option: '" ++ head rest2 ++ "'"))
no_flags <- mapM no_flag minus_opts
newDynFlags no_flags
-isMinus ('-':s) = True
+isMinus :: String -> Bool
+isMinus ('-':_) = True
isMinus _ = False
-isPlus ('+':s) = True
-isPlus _ = False
+isPlus :: String -> Either String String
+isPlus ('+':opt) = Left opt
+isPlus other = Right other
+
+setOpt, unsetOpt :: String -> GHCi ()
-setOpt ('+':str)
+setOpt str
= case strToGHCiOpt str of
Nothing -> io (putStrLn ("unknown option: '" ++ str ++ "'"))
Just o -> setOption o
-unsetOpt ('+':str)
+unsetOpt str
= case strToGHCiOpt str of
Nothing -> io (putStrLn ("unknown option: '" ++ str ++ "'"))
Just o -> unsetOption o
-- ---------------------------------------------------------------------------
-- code for `:show'
+showCmd :: String -> GHCi ()
showCmd str = do
st <- getGHCiState
case words str of
["context"] -> showContext
_ -> throwDyn (CmdLineError "syntax: :show [args|prog|prompt|editor|stop|modules|bindings|breaks|context]")
+showModules :: GHCi ()
showModules = do
session <- getSession
loaded_mods <- getLoadedModules session
graph <- io (GHC.getModuleGraph session)
filterM (io . GHC.isLoaded session . GHC.ms_mod_name) graph
+showBindings :: GHCi ()
showBindings = do
s <- getSession
- unqual <- io (GHC.getPrintUnqual s)
bindings <- io (GHC.getBindings s)
mapM_ printTyThing $ sortBy compareTyThings bindings
return ()
-- Completion
completeNone :: String -> IO [String]
-completeNone w = return []
+completeNone _w = return []
#ifdef USE_READLINE
completeWord :: String -> Int -> Int -> IO (Maybe (String, [String]))
| otherwise = selectWord xs
+completeCmd, completeMacro, completeIdentifier, completeModule,
+ completeHomeModule, completeSetOptions, completeFilename,
+ completeHomeModuleOrFile
+ :: String -> IO [String]
+
completeCmd w = do
cmds <- readIORef commands
return (filter (w `isPrefixOf`) (map (':':) (map cmdName cmds)))
getCommonPrefix :: [String] -> String
getCommonPrefix [] = ""
getCommonPrefix (s:ss) = foldl common s ss
- where common s "" = ""
- common "" s = ""
+ where common _s "" = ""
+ common "" _s = ""
common (c:cs) (d:ds)
| c == d = c : common cs ds
| otherwise = ""
io installSignalHandlers
ghciHandle handler (showException exception >> return False)
+showException :: Exception -> GHCi ()
showException (DynException dyn) =
case fromDynamic dyn of
Nothing -> io (putStrLn ("*** Exception: (unknown)"))
throwDyn (CmdLineError ("module '" ++ str ++ "' is not interpreted"))
return modl
+wantNameFromInterpretedModule :: (Name -> SDoc -> GHCi ()) -> String
+ -> (Name -> GHCi ())
+ -> GHCi ()
wantNameFromInterpretedModule noCanDo str and_then = do
session <- getSession
names <- io $ GHC.parseName session str
-- -----------------------------------------------------------------------------
-- commands for debugger
+sprintCmd, printCmd, forceCmd :: String -> GHCi ()
sprintCmd = pprintCommand False False
printCmd = pprintCommand True False
forceCmd = pprintCommand False True
+pprintCommand :: Bool -> Bool -> String -> GHCi ()
pprintCommand bind force str = do
session <- getSession
io $ pprintClosureCommand session bind force str
mb_span <- getCurrentBreakSpan
case mb_span of
Nothing -> stepCmd []
- Just loc -> do
+ Just _ -> do
Just span <- getCurrentBreakSpan
let f some_span = optSrcSpanFileName span == optSrcSpanFileName some_span
doContinue f GHC.SingleStep
continueCmd = noArgs $ doContinue (const True) GHC.RunToCompletion
-- doContinue :: SingleStep -> GHCi ()
+doContinue :: (SrcSpan -> Bool) -> SingleStep -> GHCi ()
doContinue pred step = do
session <- getSession
runResult <- io $ GHC.resume session step
resumes <- io $ GHC.getResumeContext s
case resumes of
[] -> io $ putStrLn "Not stopped at a breakpoint"
- (r:rs) -> do
+ (r:_) -> do
let hist = GHC.resumeHistory r
(took,rest) = splitAt num hist
spans <- mapM (io . GHC.getHistorySpan s) took
(map (parens . ppr) spans)))
io $ putStrLn $ if null rest then "<end of history>" else "..."
+bold :: SDoc -> SDoc
bold c | do_bold = text start_bold <> c <> text end_bold
| otherwise = c
backCmd :: String -> GHCi ()
backCmd = noArgs $ do
s <- getSession
- (names, ix, span) <- io $ GHC.back s
+ (names, _, span) <- io $ GHC.back s
printForUser $ ptext SLIT("Logged breakpoint at") <+> ppr span
printTypeOfNames s names
-- run the command set with ":set stop <cmd>"
breakSwitch :: Session -> [String] -> GHCi ()
breakSwitch _session [] = do
io $ putStrLn "The break command requires at least one argument."
-breakSwitch session args@(arg1:rest)
+breakSwitch session (arg1:rest)
| looksLikeModuleName arg1 = do
mod <- wantInterpretedModule arg1
- breakByModule session mod rest
+ breakByModule mod rest
| all isDigit arg1 = do
(toplevel, _) <- io $ GHC.getContext session
case toplevel of
noCanDo n why = printForUser $
text "cannot set breakpoint on " <> ppr n <> text ": " <> why
-breakByModule :: Session -> Module -> [String] -> GHCi ()
-breakByModule session mod args@(arg1:rest)
+breakByModule :: Module -> [String] -> GHCi ()
+breakByModule mod (arg1:rest)
| all isDigit arg1 = do -- looks like a line number
breakByModuleLine mod (read arg1) rest
-breakByModule session mod _
+breakByModule _ _
= breakSyntax
breakByModuleLine :: Module -> Int -> [String] -> GHCi ()
findBreakAndSet mod $ findBreakByCoord Nothing (line, read col)
| otherwise = breakSyntax
+breakSyntax :: a
breakSyntax = throwDyn (CmdLineError "Syntax: :break [<mod>] <line> [<column>]")
findBreakAndSet :: Module -> (TickArray -> Maybe (Int, SrcSpan)) -> GHCi ()
Nothing -> io $ putStrLn $ "No breakpoints found at that location."
Just (tick, span) -> do
success <- io $ setBreakFlag True breakArray tick
- session <- getSession
if success
then do
(alreadySet, nm) <-
where
ticks = arr ! line
- starts_here = [ tick | tick@(nm,span) <- ticks,
+ starts_here = [ tick | tick@(_,span) <- ticks,
GHC.srcSpanStartLine span == line ]
(complete,incomplete) = partition ends_here starts_here
- where ends_here (nm,span) = GHC.srcSpanEndLine span == line
+ where ends_here (_,span) = GHC.srcSpanEndLine span == line
findBreakByCoord :: Maybe FastString -> (Int,Int) -> TickArray
-> Maybe (BreakIndex,SrcSpan)
ticks = arr ! line
-- the ticks that span this coordinate
- contains = [ tick | tick@(nm,span) <- ticks, span `spans` (line,col),
+ contains = [ tick | tick@(_,span) <- ticks, span `spans` (line,col),
is_correct_file span ]
is_correct_file span
| Just f <- mb_file = GHC.srcSpanFile span == f
| otherwise = True
- after_here = [ tick | tick@(nm,span) <- ticks,
+ after_here = [ tick | tick@(_,span) <- ticks,
GHC.srcSpanStartLine span == line,
GHC.srcSpanStartCol span >= col ]
do_bold :: Bool
do_bold = (`isPrefixOf` unsafePerformIO mTerm) `any` ["xterm", "linux"]
where mTerm = System.Environment.getEnv "TERM"
- `Exception.catch` \e -> return "TERM not set"
+ `Exception.catch` \_ -> return "TERM not set"
start_bold :: String
start_bold = "\ESC[1m"
| otherwise -> printForUser $ text "unable to list source for" <+> ppr span
listCmd str = list2 (words str)
+list2 :: [String] -> GHCi ()
list2 [arg] | all isDigit arg = do
session <- getSession
(toplevel, _) <- io $ GHC.getContext session
-- | list a section of a source file around a particular SrcSpan.
-- If the highlight flag is True, also highlight the span using
-- start_bold/end_bold.
+listAround :: SrcSpan -> Bool -> IO ()
listAround span do_highlight = do
contents <- BS.readFile (unpackFS file)
let
bs_line_nos = [ BS.pack (show l ++ " ") | l <- line_nos ]
prefixed = zipWith ($) highlighted bs_line_nos
--
- BS.putStrLn (BS.join (BS.pack "\n") prefixed)
+ BS.putStrLn (BS.intercalate (BS.pack "\n") prefixed)
where
file = GHC.srcSpanFile span
line1 = GHC.srcSpanStartLine span
case lookupModuleEnv arrmap modl of
Just arr -> return arr
Nothing -> do
- (breakArray, ticks) <- getModBreak modl
+ (_breakArray, ticks) <- getModBreak modl
let arr = mkTickArray (assocs ticks)
setGHCiState st{tickarrays = extendModuleEnv arrmap modl arr}
return arr
mapM (turnOffBreak.snd) this
setGHCiState $ st { breaks = rest }
+turnOffBreak :: BreakLocation -> GHCi Bool
turnOffBreak loc = do
(arr, _) <- getModBreak (breakModule loc)
io $ setBreakFlag False arr (breakTick loc)
projects / ghc-hetmet.git / commitdiff