{-# OPTIONS_GHC -Wwarn #-} {-# LANGUAGE CPP, ScopedTypeVariables, OverloadedStrings, Rank2Types #-} {-# LANGUAGE LambdaCase #-} ----------------------------------------------------------------------------- -- | -- Module : Haddock -- Copyright : (c) Simon Marlow 2003-2006, -- David Waern 2006-2010, -- Mateusz Kowalczyk 2014 -- License : BSD-like -- -- Maintainer : haddock@projects.haskell.org -- Stability : experimental -- Portability : portable -- -- Haddock - A Haskell Documentation Tool -- -- Program entry point and top-level code. ----------------------------------------------------------------------------- module Haddock ( haddock, haddockWithGhc, getGhcDirs, readPackagesAndProcessModules, withGhc ) where import Haddock.Backends.Xhtml import Haddock.Backends.Xhtml.Meta import Haddock.Backends.Xhtml.Themes (getThemes) import Haddock.Backends.LaTeX import Haddock.Backends.Hoogle import Haddock.Backends.Hyperlinker import Haddock.Interface import Haddock.Interface.Json import Haddock.Parser import Haddock.Types import Haddock.Version import Haddock.InterfaceFile import Haddock.Options import Haddock.Utils import Control.Monad hiding (forM_) import Data.Foldable (forM_, foldl') import Data.Traversable (for) import Data.List (isPrefixOf) import Control.Exception import Data.Maybe import Data.IORef import Data.Map (Map) import Data.Version (makeVersion) import qualified Data.Map as Map import System.IO import System.Exit #if defined(mingw32_HOST_OS) import Foreign import Foreign.C import Data.Int #endif #ifdef IN_GHC_TREE import System.FilePath #else import qualified GHC.Paths as GhcPaths import Paths_haddock_api (getDataDir) import System.Directory (doesDirectoryExist) #endif import Text.ParserCombinators.ReadP (readP_to_S) import GHC hiding (verbosity) import Config import DynFlags hiding (projectVersion, verbosity) import ErrUtils import Packages import Panic (handleGhcException) import Module import FastString import qualified DynamicLoading -------------------------------------------------------------------------------- -- * Exception handling -------------------------------------------------------------------------------- handleTopExceptions :: IO a -> IO a handleTopExceptions = handleNormalExceptions . handleHaddockExceptions . handleGhcExceptions -- | Either returns normally or throws an ExitCode exception; -- all other exceptions are turned into exit exceptions. handleNormalExceptions :: IO a -> IO a handleNormalExceptions inner = (inner `onException` hFlush stdout) `catches` [ Handler (\(code :: ExitCode) -> exitWith code) , Handler (\(ex :: AsyncException) -> case ex of StackOverflow -> do putStrLn "stack overflow: use -g +RTS -K<size> to increase it" exitFailure _ -> do putStrLn ("haddock: " ++ show ex) exitFailure) , Handler (\(ex :: SomeException) -> do putStrLn ("haddock: internal error: " ++ show ex) exitFailure) ] handleHaddockExceptions :: IO a -> IO a handleHaddockExceptions inner = catches inner [Handler handler] where handler (e::HaddockException) = do putStrLn $ "haddock: " ++ show e exitFailure handleGhcExceptions :: IO a -> IO a handleGhcExceptions = -- error messages propagated as exceptions handleGhcException $ \e -> do hFlush stdout print (e :: GhcException) exitFailure ------------------------------------------------------------------------------- -- * Top level ------------------------------------------------------------------------------- -- | Run Haddock with given list of arguments. -- -- Haddock's own main function is defined in terms of this: -- -- > main = getArgs >>= haddock haddock :: [String] -> IO () haddock args = haddockWithGhc withGhc args haddockWithGhc :: (forall a. [Flag] -> Ghc a -> IO a) -> [String] -> IO () haddockWithGhc ghc args = handleTopExceptions $ do -- Parse command-line flags and handle some of them initially. -- TODO: unify all of this (and some of what's in the 'render' function), -- into one function that returns a record with a field for each option, -- or which exits with an error or help message. (flags, files) <- parseHaddockOpts args shortcutFlags flags qual <- rightOrThrowE (qualification flags) sinceQual <- rightOrThrowE (sinceQualification flags) -- inject dynamic-too into flags before we proceed flags' <- ghc flags $ do df <- getDynFlags case lookup "GHC Dynamic" (compilerInfo df) of Just "YES" -> return $ Flag_OptGhc "-dynamic-too" : flags _ -> return flags unless (Flag_NoWarnings `elem` flags) $ do hypSrcWarnings flags forM_ (warnings args) $ \warning -> do hPutStrLn stderr warning ghc flags' $ do dflags <- getDynFlags forM_ (optShowInterfaceFile flags) $ \path -> liftIO $ do mIfaceFile <- readInterfaceFiles freshNameCache [(("", Nothing), path)] forM_ mIfaceFile $ \(_, ifaceFile) -> do putMsg dflags (renderJson (jsonInterfaceFile ifaceFile)) if not (null files) then do (packages, ifaces, homeLinks) <- readPackagesAndProcessModules flags files -- Dump an "interface file" (.haddock file), if requested. forM_ (optDumpInterfaceFile flags) $ \path -> liftIO $ do writeInterfaceFile path InterfaceFile { ifInstalledIfaces = map toInstalledIface ifaces , ifLinkEnv = homeLinks } -- Render the interfaces. liftIO $ renderStep dflags flags sinceQual qual packages ifaces else do when (any (`elem` [Flag_Html, Flag_Hoogle, Flag_LaTeX]) flags) $ throwE "No input file(s)." -- Get packages supplied with --read-interface. packages <- liftIO $ readInterfaceFiles freshNameCache (readIfaceArgs flags) -- Render even though there are no input files (usually contents/index). liftIO $ renderStep dflags flags sinceQual qual packages [] -- | Create warnings about potential misuse of -optghc warnings :: [String] -> [String] warnings = map format . filter (isPrefixOf "-optghc") where format arg = concat ["Warning: `", arg, "' means `-o ", drop 2 arg, "', did you mean `-", arg, "'?"] withGhc :: [Flag] -> Ghc a -> IO a withGhc flags action = do libDir <- fmap snd (getGhcDirs flags) -- Catches all GHC source errors, then prints and re-throws them. let handleSrcErrors action' = flip handleSourceError action' $ \err -> do printException err liftIO exitFailure withGhc' libDir (ghcFlags flags) (\_ -> handleSrcErrors action) readPackagesAndProcessModules :: [Flag] -> [String] -> Ghc ([(DocPaths, InterfaceFile)], [Interface], LinkEnv) readPackagesAndProcessModules flags files = do -- Get packages supplied with --read-interface. packages <- readInterfaceFiles nameCacheFromGhc (readIfaceArgs flags) -- Create the interfaces -- this is the core part of Haddock. let ifaceFiles = map snd packages (ifaces, homeLinks) <- processModules (verbosity flags) files flags ifaceFiles return (packages, ifaces, homeLinks) renderStep :: DynFlags -> [Flag] -> SinceQual -> QualOption -> [(DocPaths, InterfaceFile)] -> [Interface] -> IO () renderStep dflags flags sinceQual nameQual pkgs interfaces = do updateHTMLXRefs pkgs let ifaceFiles = map snd pkgs installedIfaces = concatMap ifInstalledIfaces ifaceFiles extSrcMap = Map.fromList $ do ((_, Just path), ifile) <- pkgs iface <- ifInstalledIfaces ifile return (instMod iface, path) render dflags flags sinceQual nameQual interfaces installedIfaces extSrcMap -- | Render the interfaces with whatever backend is specified in the flags. render :: DynFlags -> [Flag] -> SinceQual -> QualOption -> [Interface] -> [InstalledInterface] -> Map Module FilePath -> IO () render dflags flags sinceQual qual ifaces installedIfaces extSrcMap = do let title = fromMaybe "" (optTitle flags) unicode = Flag_UseUnicode `elem` flags pretty = Flag_PrettyHtml `elem` flags opt_wiki_urls = wikiUrls flags opt_contents_url = optContentsUrl flags opt_index_url = optIndexUrl flags odir = outputDir flags opt_latex_style = optLaTeXStyle flags opt_source_css = optSourceCssFile flags opt_mathjax = optMathjax flags dflags' | unicode = gopt_set dflags Opt_PrintUnicodeSyntax | otherwise = dflags visibleIfaces = [ i | i <- ifaces, OptHide `notElem` ifaceOptions i ] -- /All/ visible interfaces including external package modules. allIfaces = map toInstalledIface ifaces ++ installedIfaces allVisibleIfaces = [ i | i <- allIfaces, OptHide `notElem` instOptions i ] pkgMod = ifaceMod (head ifaces) pkgKey = moduleUnitId pkgMod pkgStr = Just (unitIdString pkgKey) pkgNameVer = modulePackageInfo dflags flags pkgMod pkgName = fmap (unpackFS . (\(PackageName n) -> n)) (fst pkgNameVer) sincePkg = case sinceQual of External -> pkgName Always -> Nothing (srcBase, srcModule, srcEntity, srcLEntity) = sourceUrls flags srcModule' | Flag_HyperlinkedSource `elem` flags = Just hypSrcModuleUrlFormat | otherwise = srcModule srcMap = Map.union (Map.map SrcExternal extSrcMap) (Map.fromList [ (ifaceMod iface, SrcLocal) | iface <- ifaces ]) pkgSrcMap = Map.mapKeys moduleUnitId extSrcMap pkgSrcMap' | Flag_HyperlinkedSource `elem` flags = Map.insert pkgKey hypSrcModuleNameUrlFormat pkgSrcMap | Just srcNameUrl <- srcEntity = Map.insert pkgKey srcNameUrl pkgSrcMap | otherwise = pkgSrcMap -- TODO: Get these from the interface files as with srcMap pkgSrcLMap' | Flag_HyperlinkedSource `elem` flags = Map.singleton pkgKey hypSrcModuleLineUrlFormat | Just path <- srcLEntity = Map.singleton pkgKey path | otherwise = Map.empty sourceUrls' = (srcBase, srcModule', pkgSrcMap', pkgSrcLMap') installedMap :: Map Module InstalledInterface installedMap = Map.fromList [ (unwire (instMod iface), iface) | iface <- installedIfaces ] -- The user gives use base-4.9.0.0, but the InstalledInterface -- records the *wired in* identity base. So untranslate it -- so that we can service the request. unwire :: Module -> Module unwire m = m { moduleUnitId = unwireUnitId dflags (moduleUnitId m) } reexportedIfaces <- concat `fmap` (for (reexportFlags flags) $ \mod_str -> do let warn = hPutStrLn stderr . ("Warning: " ++) case readP_to_S parseModuleId mod_str of [(m, "")] | Just iface <- Map.lookup m installedMap -> return [iface] | otherwise -> warn ("Cannot find reexported module '" ++ mod_str ++ "'") >> return [] _ -> warn ("Cannot parse reexported module flag '" ++ mod_str ++ "'") >> return []) libDir <- getHaddockLibDir flags prologue <- getPrologue dflags' flags themes <- getThemes libDir flags >>= either bye return let withQuickjump = Flag_QuickJumpIndex `elem` flags when (Flag_GenIndex `elem` flags) $ do withTiming (pure dflags') "ppHtmlIndex" (const ()) $ do _ <- {-# SCC ppHtmlIndex #-} ppHtmlIndex odir title pkgStr themes opt_mathjax opt_contents_url sourceUrls' opt_wiki_urls allVisibleIfaces pretty return () copyHtmlBits odir libDir themes withQuickjump when (Flag_GenContents `elem` flags) $ do withTiming (pure dflags') "ppHtmlContents" (const ()) $ do _ <- {-# SCC ppHtmlContents #-} ppHtmlContents dflags' odir title pkgStr themes opt_mathjax opt_index_url sourceUrls' opt_wiki_urls allVisibleIfaces True prologue pretty sincePkg (makeContentsQual qual) return () copyHtmlBits odir libDir themes withQuickjump when (Flag_Html `elem` flags) $ do withTiming (pure dflags') "ppHtml" (const ()) $ do _ <- {-# SCC ppHtml #-} ppHtml dflags' title pkgStr visibleIfaces reexportedIfaces odir prologue themes opt_mathjax sourceUrls' opt_wiki_urls opt_contents_url opt_index_url unicode sincePkg qual pretty withQuickjump return () copyHtmlBits odir libDir themes withQuickjump writeHaddockMeta odir withQuickjump -- TODO: we throw away Meta for both Hoogle and LaTeX right now, -- might want to fix that if/when these two get some work on them when (Flag_Hoogle `elem` flags) $ do case pkgNameVer of (Just (PackageName pkgNameFS), mpkgVer) -> let pkgNameStr | unpackFS pkgNameFS == "main" && title /= [] = title | otherwise = unpackFS pkgNameFS pkgVer = fromMaybe (makeVersion []) mpkgVer in ppHoogle dflags' pkgNameStr pkgVer title (fmap _doc prologue) visibleIfaces odir _ -> putStrLn . unlines $ [ "haddock: Unable to find a package providing module " ++ moduleNameString (moduleName pkgMod) ++ ", skipping Hoogle." , "" , " Perhaps try specifying the desired package explicitly" ++ " using the --package-name" , " and --package-version arguments." ] when (Flag_LaTeX `elem` flags) $ do withTiming (pure dflags') "ppLatex" (const ()) $ do _ <- {-# SCC ppLatex #-} ppLaTeX title pkgStr visibleIfaces odir (fmap _doc prologue) opt_latex_style libDir return () when (Flag_HyperlinkedSource `elem` flags && not (null ifaces)) $ do withTiming (pure dflags') "ppHyperlinkedSource" (const ()) $ do _ <- {-# SCC ppHyperlinkedSource #-} ppHyperlinkedSource odir libDir opt_source_css pretty srcMap ifaces return () ------------------------------------------------------------------------------- -- * Reading and dumping interface files ------------------------------------------------------------------------------- readInterfaceFiles :: MonadIO m => NameCacheAccessor m -> [(DocPaths, FilePath)] -> m [(DocPaths, InterfaceFile)] readInterfaceFiles name_cache_accessor pairs = do catMaybes `liftM` mapM ({-# SCC readInterfaceFile #-} tryReadIface) pairs where -- try to read an interface, warn if we can't tryReadIface (paths, file) = readInterfaceFile name_cache_accessor file >>= \case Left err -> liftIO $ do putStrLn ("Warning: Cannot read " ++ file ++ ":") putStrLn (" " ++ err) putStrLn "Skipping this interface." return Nothing Right f -> return $ Just (paths, f) ------------------------------------------------------------------------------- -- * Creating a GHC session ------------------------------------------------------------------------------- -- | Start a GHC session with the -haddock flag set. Also turn off -- compilation and linking. Then run the given 'Ghc' action. withGhc' :: String -> [String] -> (DynFlags -> Ghc a) -> IO a withGhc' libDir flags ghcActs = runGhc (Just libDir) $ do dynflags <- getSessionDynFlags dynflags' <- parseGhcFlags (gopt_set dynflags Opt_Haddock) { hscTarget = HscNothing, ghcMode = CompManager, ghcLink = NoLink } -- We disable pattern match warnings because than can be very -- expensive to check let dynflags'' = unsetPatternMatchWarnings $ updOptLevel 0 $ gopt_unset dynflags' Opt_SplitObjs -- ignore the following return-value, which is a list of packages -- that may need to be re-linked: Haddock doesn't do any -- dynamic or static linking at all! _ <- setSessionDynFlags dynflags'' hscenv <- GHC.getSession dynflags''' <- liftIO (DynamicLoading.initializePlugins hscenv dynflags'') _ <- setSessionDynFlags dynflags''' ghcActs dynflags''' where -- ignore sublists of flags that start with "+RTS" and end in "-RTS" -- -- See https://github.com/haskell/haddock/issues/666 filterRtsFlags :: [String] -> [String] filterRtsFlags flgs = foldr go (const []) flgs True where go "-RTS" func _ = func True go "+RTS" func _ = func False go _ func False = func False go arg func True = arg : func True parseGhcFlags :: MonadIO m => DynFlags -> m DynFlags parseGhcFlags dynflags = do -- TODO: handle warnings? let flags' = filterRtsFlags flags (dynflags', rest, _) <- parseDynamicFlags dynflags (map noLoc flags') if not (null rest) then throwE ("Couldn't parse GHC options: " ++ unwords flags') else return dynflags' unsetPatternMatchWarnings :: DynFlags -> DynFlags unsetPatternMatchWarnings dflags = foldl' wopt_unset dflags pattern_match_warnings where pattern_match_warnings = [ Opt_WarnIncompletePatterns , Opt_WarnIncompleteUniPatterns , Opt_WarnIncompletePatternsRecUpd , Opt_WarnOverlappingPatterns ] ------------------------------------------------------------------------------- -- * Misc ------------------------------------------------------------------------------- getHaddockLibDir :: [Flag] -> IO String getHaddockLibDir flags = case [str | Flag_Lib str <- flags] of [] -> do #ifdef IN_GHC_TREE getInTreeDir #else -- if data directory does not exist we are probably -- invoking from either ./haddock-api or ./ let res_dirs = [ getDataDir -- provided by Cabal , pure "resources" , pure "haddock-api/resources" ] check get_path = do p <- get_path exists <- doesDirectoryExist p pure $ if exists then Just p else Nothing dirs <- mapM check res_dirs case [p | Just p <- dirs] of (p : _) -> return p _ -> die "Haddock's resource directory does not exist!\n" #endif fs -> return (last fs) getGhcDirs :: [Flag] -> IO (String, String) getGhcDirs flags = do case [ dir | Flag_GhcLibDir dir <- flags ] of [] -> do #ifdef IN_GHC_TREE libDir <- getInTreeDir return (ghcPath, libDir) #else return (ghcPath, GhcPaths.libdir) #endif xs -> return (ghcPath, last xs) where #ifdef IN_GHC_TREE ghcPath = "not available" #else ghcPath = GhcPaths.ghc #endif shortcutFlags :: [Flag] -> IO () shortcutFlags flags = do usage <- getUsage when (Flag_Help `elem` flags) (bye usage) when (Flag_Version `elem` flags) byeVersion when (Flag_InterfaceVersion `elem` flags) (bye (show binaryInterfaceVersion ++ "\n")) when (Flag_CompatibleInterfaceVersions `elem` flags) (bye (unwords (map show binaryInterfaceVersionCompatibility) ++ "\n")) when (Flag_GhcVersion `elem` flags) (bye (cProjectVersion ++ "\n")) when (Flag_PrintGhcPath `elem` flags) $ do dir <- fmap fst (getGhcDirs flags) bye $ dir ++ "\n" when (Flag_PrintGhcLibDir `elem` flags) $ do dir <- fmap snd (getGhcDirs flags) bye $ dir ++ "\n" when (Flag_UseUnicode `elem` flags && Flag_Html `notElem` flags) $ throwE "Unicode can only be enabled for HTML output." when ((Flag_GenIndex `elem` flags || Flag_GenContents `elem` flags) && Flag_Html `elem` flags) $ throwE "-h/--html cannot be used with --gen-index or --gen-contents" when ((Flag_GenIndex `elem` flags || Flag_GenContents `elem` flags) && Flag_Hoogle `elem` flags) $ throwE "--hoogle cannot be used with --gen-index or --gen-contents" when ((Flag_GenIndex `elem` flags || Flag_GenContents `elem` flags) && Flag_LaTeX `elem` flags) $ throwE "--latex cannot be used with --gen-index or --gen-contents" where byeVersion = bye $ "Haddock version " ++ projectVersion ++ ", (c) Simon Marlow 2006\n" ++ "Ported to use the GHC API by David Waern 2006-2008\n" -- | Generate some warnings about potential misuse of @--hyperlinked-source@. hypSrcWarnings :: [Flag] -> IO () hypSrcWarnings flags = do when (hypSrc && any isSourceUrlFlag flags) $ hPutStrLn stderr $ concat [ "Warning: " , "--source-* options are ignored when " , "--hyperlinked-source is enabled." ] when (not hypSrc && any isSourceCssFlag flags) $ hPutStrLn stderr $ concat [ "Warning: " , "source CSS file is specified but " , "--hyperlinked-source is disabled." ] where hypSrc = Flag_HyperlinkedSource `elem` flags isSourceUrlFlag (Flag_SourceBaseURL _) = True isSourceUrlFlag (Flag_SourceModuleURL _) = True isSourceUrlFlag (Flag_SourceEntityURL _) = True isSourceUrlFlag (Flag_SourceLEntityURL _) = True isSourceUrlFlag _ = False isSourceCssFlag (Flag_SourceCss _) = True isSourceCssFlag _ = False updateHTMLXRefs :: [(DocPaths, InterfaceFile)] -> IO () updateHTMLXRefs packages = do writeIORef html_xrefs_ref (Map.fromList mapping) writeIORef html_xrefs_ref' (Map.fromList mapping') where mapping = [ (instMod iface, html) | ((html, _), ifaces) <- packages , iface <- ifInstalledIfaces ifaces ] mapping' = [ (moduleName m, html) | (m, html) <- mapping ] getPrologue :: DynFlags -> [Flag] -> IO (Maybe (MDoc RdrName)) getPrologue dflags flags = case [filename | Flag_Prologue filename <- flags ] of [] -> return Nothing [filename] -> do h <- openFile filename ReadMode hSetEncoding h utf8 str <- hGetContents h -- semi-closes the handle return . Just $! parseParas dflags Nothing str _ -> throwE "multiple -p/--prologue options" rightOrThrowE :: Either String b -> IO b rightOrThrowE (Left msg) = throwE msg rightOrThrowE (Right x) = pure x #ifdef IN_GHC_TREE getInTreeDir :: IO String getInTreeDir = getExecDir >>= \case Nothing -> error "No GhcDir found" Just d -> return (d </> ".." </> "lib") getExecDir :: IO (Maybe String) #if defined(mingw32_HOST_OS) getExecDir = try_size 2048 -- plenty, PATH_MAX is 512 under Win32. where try_size size = allocaArray (fromIntegral size) $ \buf -> do ret <- c_GetModuleFileName nullPtr buf size case ret of 0 -> return Nothing _ | ret < size -> fmap (Just . dropFileName) $ peekCWString buf | otherwise -> try_size (size * 2) # if defined(i386_HOST_ARCH) # define WINDOWS_CCONV stdcall # elif defined(x86_64_HOST_ARCH) # define WINDOWS_CCONV ccall # else # error Unknown mingw32 arch # endif foreign import WINDOWS_CCONV unsafe "windows.h GetModuleFileNameW" c_GetModuleFileName :: Ptr () -> CWString -> Word32 -> IO Word32 #else getExecDir = return Nothing #endif #endif