hhp-0.0.0: src/hhpi.hs
{-# LANGUAGE DeriveDataTypeable, CPP #-}
-- Commands:
-- check <file>
-- find <symbol>
-- info <file> <expr>
-- type <file> <line> <column>
-- lint [hlint options] <file>
-- the format of hlint options is [String] because they may contain
-- spaces and also <file> may contain spaces.
-- boot
-- browse [<package>:]<module>
-- quit
--
-- Session separators:
-- OK -- success
-- NG -- failure
module Main where
import Config (cProjectVersion)
import CoreMonad (liftIO)
import GHC (Ghc)
#if __GLASGOW_HASKELL__ >= 804
import GHC (mgModSummaries)
#endif
import qualified GHC as G
import Control.Concurrent (forkIO, MVar, newEmptyMVar, putMVar, readMVar)
import Control.Exception (SomeException(..), Exception)
import qualified Control.Exception as E
import Control.Monad (when, void)
import Data.List (find)
import Data.Maybe (fromMaybe)
import Data.Set (Set)
import qualified Data.Set as S
import Data.Typeable (Typeable)
import Data.Version (showVersion)
import System.Console.GetOpt
import System.Directory (setCurrentDirectory)
import System.Environment (getArgs)
import System.IO (hFlush,stdout)
import Hhp
import Hhp.Ghc
-- import Hhp.Internal
import Paths_hhp
----------------------------------------------------------------
type Logger = IO String
----------------------------------------------------------------
progVersion :: String
progVersion = "hhpi version " ++ showVersion version ++ " compiled by GHC " ++ cProjectVersion ++ "\n"
argspec :: [OptDescr (Options -> Options)]
argspec = [ Option "b" ["boundary"]
(ReqArg (\s opts -> opts { lineSeparator = LineSeparator s }) "sep")
"specify line separator (default is Nul string)"
, Option "l" ["tolisp"]
(NoArg (\opts -> opts { outputStyle = LispStyle }))
"print as a list of Lisp"
, Option "g" []
(ReqArg (\s opts -> opts { ghcOpts = s : ghcOpts opts }) "flag") "specify a ghc flag"
]
usage :: String
usage = progVersion
++ "Usage:\n"
++ "\t hhpi [-l] [-b sep] [-g flag]\n"
++ "\t hhpi version\n"
++ "\t hhpi help\n"
parseArgs :: [OptDescr (Options -> Options)] -> [String] -> (Options, [String])
parseArgs spec argv
= case getOpt Permute spec argv of
(o,n,[] ) -> (foldr id defaultOptions o, n)
(_,_,errs) -> E.throw (CmdArg errs)
----------------------------------------------------------------
newtype HhpiError = CmdArg [String] deriving (Show, Typeable)
instance Exception HhpiError
----------------------------------------------------------------
-- Running two GHC monad threads disables the handling of
-- C-c since installSignalHandlers is called twice, sigh.
main :: IO ()
main = E.handle cmdHandler $
go =<< parseArgs argspec <$> getArgs
where
cmdHandler (CmdArg _) = putStr $ usageInfo usage argspec
go (_,"help":_) = putStr $ usageInfo usage argspec
go (_,"version":_) = putStr progVersion
go (opt,_) = E.handle someHandler $ do
cradle0 <- findCradle
let rootdir = cradleRootDir cradle0
cradle = cradle0 { cradleCurrentDir = rootdir }
setCurrentDirectory rootdir
mvar <- liftIO newEmptyMVar
mlibdir <- getSystemLibDir
void $ forkIO $ setupDB cradle mlibdir opt mvar
run cradle mlibdir opt $ loop opt S.empty mvar
where
-- this is just in case.
-- If an error is caught here, it is a bug of Hhp library.
someHandler (SomeException e) = do
putStrLn $ "NG " ++ replace (show e)
replace :: String -> String
replace [] = []
replace ('\n':xs) = ';' : replace xs
replace (x:xs) = x : replace xs
----------------------------------------------------------------
run :: Cradle -> Maybe FilePath -> Options -> Ghc a -> IO a
run cradle mlibdir opt body = G.runGhc mlibdir $ do
initializeFlagsWithCradle opt cradle
body
----------------------------------------------------------------
setupDB :: Cradle -> Maybe FilePath -> Options -> MVar SymMdlDb -> IO ()
setupDB cradle mlibdir opt mvar = E.handle handler $ do
db <- run cradle mlibdir opt getSymMdlDb
putMVar mvar db
where
handler (SomeException _) = return () -- fixme: put emptyDb?
----------------------------------------------------------------
loop :: Options -> Set FilePath -> MVar SymMdlDb -> Ghc ()
loop opt set mvar = do
cmdArg <- liftIO getLine
let (cmd,arg') = break (== ' ') cmdArg
arg = dropWhile (== ' ') arg'
(ret,ok,set') <- case cmd of
"check" -> checkStx opt set arg
"find" -> findSym opt set arg mvar
"lint" -> lintStx opt set arg
"info" -> showInfo opt set arg
"type" -> showType opt set arg
"boot" -> bootIt opt set
"browse" -> browseIt opt set arg
"quit" -> return ("quit", False, set)
"" -> return ("quit", False, set)
_ -> return ([], True, set)
if ok then do
liftIO $ putStr ret
liftIO $ putStrLn "OK"
else do
liftIO $ putStrLn $ "NG " ++ replace ret
liftIO $ hFlush stdout
when ok $ loop opt set' mvar
----------------------------------------------------------------
checkStx :: Options
-> Set FilePath
-> FilePath
-> Ghc (String, Bool, Set FilePath)
checkStx opt set file = do
set' <- newFileSet set file
let files = S.toList set'
eret <- check opt files
case eret of
Right ret -> return (ret, True, set')
Left ret -> return (ret, True, set) -- fxime: set
newFileSet :: Set FilePath -> FilePath -> Ghc (Set FilePath)
newFileSet set file = do
let set1
| S.member file set = set
| otherwise = S.insert file set
mx <- isSameMainFile file <$> getModSummaryForMain
return $ case mx of
Nothing -> set1
Just mainfile -> S.delete mainfile set1
getModSummaryForMain :: Ghc (Maybe G.ModSummary)
#if __GLASGOW_HASKELL__ >= 804
getModSummaryForMain = find isMain . mgModSummaries <$> G.getModuleGraph
#else
getModSummaryForMain = find isMain <$> G.getModuleGraph
#endif
where
isMain m = G.moduleNameString (G.moduleName (G.ms_mod m)) == "Main"
isSameMainFile :: FilePath -> Maybe G.ModSummary -> Maybe FilePath
isSameMainFile _ Nothing = Nothing
isSameMainFile file (Just x)
| mainfile == file = Nothing
| otherwise = Just mainfile
where
mmainfile = G.ml_hs_file (G.ms_location x)
-- G.ms_hspp_file x is a temporary file with CPP.
-- this is a just fake.
mainfile = fromMaybe (G.ms_hspp_file x) mmainfile
----------------------------------------------------------------
findSym :: Options -> Set FilePath -> String -> MVar SymMdlDb
-> Ghc (String, Bool, Set FilePath)
findSym opt set sym mvar = do
db <- liftIO $ readMVar mvar
let ret = lookupSym opt sym db
return (ret, True, set)
lintStx :: Options -> Set FilePath -> FilePath
-> Ghc (String, Bool, Set FilePath)
lintStx opt set optFile = liftIO $ do
ret <-lintSyntax opt' file
return (ret, True, set)
where
(opts,file) = parseLintOptions optFile
hopts = if opts == "" then [] else read opts
opt' = opt { hlintOpts = hopts }
-- |
-- >>> parseLintOptions "[\"--ignore=Use camelCase\", \"--ignore=Eta reduce\"] file name"
-- (["--ignore=Use camelCase", "--ignore=Eta reduce"], "file name")
-- >>> parseLintOptions "file name"
-- ([], "file name")
parseLintOptions :: String -> (String, String)
parseLintOptions optFile = case brk (== ']') (dropWhile (/= '[') optFile) of
("","") -> ([], optFile)
(opt',file') -> (opt', dropWhile (== ' ') file')
where
brk _ [] = ([],[])
brk p (x:xs')
| p x = ([x],xs')
| otherwise = let (ys,zs) = brk p xs' in (x:ys,zs)
----------------------------------------------------------------
showInfo :: Options
-> Set FilePath
-> FilePath
-> Ghc (String, Bool, Set FilePath)
showInfo opt set fileArg = do
let [file, expr] = words fileArg
set' <- newFileSet set file
ret <- info opt file expr
return (ret, True, set')
showType :: Options
-> Set FilePath
-> FilePath
-> Ghc (String, Bool, Set FilePath)
showType opt set fileArg = do
let [file, line, column] = words fileArg
set' <- newFileSet set file
ret <- types opt file (read line) (read column)
return (ret, True, set')
----------------------------------------------------------------
bootIt :: Options
-> Set FilePath
-> Ghc (String, Bool, Set FilePath)
bootIt opt set = do
ret <- boot opt
return (ret, True, set)
browseIt :: Options
-> Set FilePath
-> ModuleString
-> Ghc (String, Bool, Set FilePath)
browseIt opt set mdl = do
ret <- browse opt mdl
return (ret, True, set)