module HERMIT.Shell.Command
(
commandLine
, interpShellCommand
, unicodeConsole
, diffDocH
, diffR
, performQuery
, cl_kernel_env
, getFocusPath
, shellComplete
, evalScript
) where
import Control.Monad.State
import Data.Char
import Data.List (isPrefixOf, partition)
import Data.Maybe
import Data.Monoid
import HERMIT.Context
import HERMIT.External
import qualified HERMIT.GHC as GHC
import HERMIT.Kernel.Scoped hiding (abortS, resumeS)
import HERMIT.Kure
import HERMIT.Parser
import HERMIT.Plugin.Display
import HERMIT.Plugin.Renderer
import HERMIT.PrettyPrinter.Common
import HERMIT.Shell.Completion
import HERMIT.Shell.Externals
import HERMIT.Shell.Interpreter
import HERMIT.Shell.KernelEffect
import HERMIT.Shell.Proof
import HERMIT.Shell.ScriptToRewrite
import HERMIT.Shell.ShellEffect
import HERMIT.Shell.Types
#ifdef mingw32_HOST_OS
import HERMIT.Win32.Console
#endif
import System.IO
import System.Console.Haskeline hiding (catch, display)
banner :: String
banner = unlines
[ "===================== Welcome to HERMIT ======================"
, "HERMIT is a toolkit for the interactive transformation of GHC"
, "core language programs. Documentation on HERMIT can be found"
, "on the HERMIT web page at:"
, "http://www.ittc.ku.edu/csdl/fpg/software/hermit.html"
, ""
, "You have just loaded the interactive shell. To exit, type "
, "\"abort\" or \"resume\" to abort or resume GHC compilation."
, ""
, "Type \"help\" for instructions on how to list or search the"
, "available HERMIT commands."
, ""
, "To get started, you could try the following:"
, " - type \"binding-of 'foo\", where \"foo\" is a function"
, " defined in the module;"
, " - type \"set-pp-type Show\" to display full type information;"
, " - type \"info\" for more information about the current node;"
, " - to descend into a child node, type the name of the child"
, " (\"info\" includes a list of children of the current node);"
, " - to ascend, use the \"up\" command;"
, " - type \"log\" to display an activity log."
, "=============================================================="
]
#ifdef mingw32_HOST_OS
cygwinWarning :: String
cygwinWarning = unlines
[ "WARNING: HERMIT invoked in a Unix-like shell such as Cygwin."
, "Cygwin does not handle Ctrl-C or tab completion well in some"
, "Haskell executables. It is recommended that you use a native"
, "Windows console (such as cmd.exe or PowerShell) instead."
]
#endif
commandLine :: forall m. (MonadCatch m, MonadException m, CLMonad m)
=> [Interp m ()] -> [GHC.CommandLineOption] -> [External] -> m ()
commandLine intp opts exts = do
let (flags, filesToLoad) = partition (isPrefixOf "-") opts
ws_complete = " ()"
modify $ \ st -> st { cl_externals = shell_externals ++ exts }
let loop :: InputT m ()
loop = do
st <- lift get
let SAST n = cl_cursor st
mLine <- if cl_nav st
then liftIO getNavCmd
else getInputLine $ "hermit<" ++ show n ++ "> "
case mLine of
Nothing -> lift $ performShellEffect Resume
Just ('-':'-':_) -> loop
Just line -> if all isSpace line
then loop
else lift (evalScript intp line `catchFailHard` cl_putStrLn) >> loop
if any (`elem` ["-v0", "-v1"]) flags
then return ()
else cl_putStrLn banner
#ifdef mingw32_HOST_OS
isCyg <- liftIO isCygwinConsole
if isCyg
then cl_putStrLn cygwinWarning
else return ()
#endif
setRunningScript $ Just []
sequence_ [ case fileName of
"abort" -> performShellEffect Abort
"resume" -> performShellEffect Resume
_ -> performScriptEffect (runExprH intp) $ loadAndRun fileName
| fileName <- reverse filesToLoad
, not (null fileName)
] `catchFailHard` \ msg -> cl_putStrLn $ "Booting Failure: " ++ msg
setRunningScript Nothing
showWindow
let settings = setComplete (completeWordWithPrev Nothing ws_complete shellComplete) defaultSettings
runInputT settings loop
catchFailHard :: (MonadCatch m, CLMonad m) => m () -> (String -> m ()) -> m ()
catchFailHard m failure = catchM m $ \ msg -> ifM (gets cl_failhard) (performQuery Display (CmdName "display") >> cl_putStrLn msg >> abort) (failure msg)
evalScript :: (MonadCatch m, CLMonad m) => [Interp m ()] -> String -> m ()
evalScript intp = parseScriptCLT >=> mapM_ (runExprH intp)
runExprH :: (MonadCatch m, CLMonad m) => [Interp m ()] -> ExprH -> m ()
runExprH intp expr = prefixFailMsg ("Error in expression: " ++ unparseExprH expr ++ "\n") $ interpExprH intp expr
interpShellCommand :: (MonadCatch m, MonadException m, CLMonad m) => [Interp m ()]
interpShellCommand =
[ interpEM $ \ (RewriteCoreBox rr) -> applyRewrite rr
, interpEM $ \ (RewriteCoreTCBox rr) -> applyRewrite rr
, interpEM $ \ (BiRewriteCoreBox br) -> applyRewrite $ whicheverR br
, interpEM $ \ (CrumbBox cr) -> setPath (return (mempty @@ cr) :: TransformH CoreTC LocalPathH)
, interpEM $ \ (PathBox p) -> setPath (return p :: TransformH CoreTC LocalPathH)
, interpEM $ \ (TransformCorePathBox tt) -> setPath tt
, interpEM $ \ (TransformCoreTCPathBox tt) -> setPath tt
, interpEM $ \ (StringBox str) -> performQuery (message str)
, interpEM $ \ (TransformCoreStringBox tt) -> performQuery (QueryString tt)
, interpEM $ \ (TransformCoreTCStringBox tt) -> performQuery (QueryString tt)
, interpEM $ \ (TransformCoreTCDocHBox tt) -> performQuery (QueryDocH $ unTransformDocH tt)
, interpEM $ \ (TransformCoreCheckBox tt) -> performQuery (CorrectnessCritera tt)
, interpEM $ \ (TransformCoreTCCheckBox tt) -> performQuery (CorrectnessCritera tt)
, interpEM $ \ (effect :: KernelEffect) -> flip performKernelEffect effect
, interpM $ \ (effect :: ShellEffect) -> performShellEffect effect
, interpM $ \ (effect :: ScriptEffect) -> performScriptEffect (runExprH interpShellCommand) effect
, interpEM $ \ (query :: QueryFun) -> performQuery query
, interpM $ \ (cmd :: ProofCommand) -> performProofCommand cmd
]
getNavCmd :: IO (Maybe String)
getNavCmd = do
b_in <- hGetBuffering stdin
hSetBuffering stdin NoBuffering
b_out <- hGetBuffering stdin
hSetBuffering stdout NoBuffering
ec_in <- hGetEcho stdin
hSetEcho stdin False
putStr "(navigation mode; use arrow keys, escape to quit, '?' for help)"
r <- readCh []
putStr "\n"
hSetBuffering stdin b_in
hSetBuffering stdout b_out
hSetEcho stdin ec_in
return r
where
readCh xs = do
x <- getChar
let str = xs ++ [x]
(fromMaybe reset $ lookup str cmds) str
reset _ = do
putStr "\BEL"
readCh []
res str _ = return (Just str)
cmds = [ ("\ESC" , \ str -> ifM (hReady stdin)
(readCh str)
(return $ Just "command-line"))
, ("\ESC[" , readCh)
, ("\ESC[A", res "up")
, ("\ESC[B", res "down")
, ("\ESC[C", res "right")
, ("\ESC[D", res "left")
, ("?", res "nav-commands")
, ("f", res "step")
] ++
[ (show n, res (show n)) | n <- [0..9] :: [Int] ]