{-# OPTIONS -XPatternGuards #-} module Merge ( merge , mergeGenericPackageDescription ) where import Control.Monad.Error import Control.Exception import qualified Data.ByteString.Lazy.Char8 as BL import Data.Char (isSpace) import Data.Maybe import Data.List as L import Data.Version -- cabal import qualified Distribution.Package as Cabal import qualified Distribution.Version as Cabal import qualified Distribution.PackageDescription as Cabal ( PackageDescription(..) , FlagName(..) , GenericPackageDescription(..) ) import qualified Distribution.PackageDescription.Configuration as Cabal ( finalizePackageDescription ) import Distribution.System (buildPlatform) import Distribution.Text (display) import Distribution.Verbosity import Distribution.Simple.Utils -- cabal-install import Distribution.Client.IndexUtils ( getSourcePackages ) import qualified Distribution.Client.PackageIndex as Index import Distribution.Client.Types -- others import System.Directory ( getCurrentDirectory , getDirectoryContents , setCurrentDirectory , createDirectoryIfMissing , doesFileExist ) import System.Cmd (system) import System.FilePath (()) import System.Exit import qualified Cabal2Ebuild as C2E import qualified Portage.EBuild as E import Error as E import Network.URI import qualified Portage.PackageId as Portage import qualified Portage.Version as Portage import qualified Portage.Metadata as Portage import qualified Portage.Overlay as Overlay import qualified Portage.Resolve as Portage import qualified Portage.GHCCore as GHCCore import qualified Merge.Dependencies as Merge (<.>) :: String -> String -> String a <.> b = a ++ '.':b {- Requested features: * Add files to git? * Print diff with the next latest version? -} readPackageString :: [String] -> Either HackPortError ( Maybe Portage.Category , Cabal.PackageName , Maybe Portage.Version ) readPackageString args = do packageString <- case args of [] -> Left (ArgumentError "Need an argument, [category/]package[-version]") [pkg] -> return pkg _ -> Left (ArgumentError ("Too many arguments: " ++ unwords args)) case Portage.parseFriendlyPackage packageString of Just v@(_,_,Nothing) -> return v -- we only allow versions we can convert into cabal versions Just v@(_,_,Just (Portage.Version _ Nothing [] 0)) -> return v _ -> Left (ArgumentError ("Could not parse [category/]package[-version]: " ++ packageString)) -- | Given a list of available packages, and maybe a preferred version, -- return the available package with that version. Latest version is chosen -- if no preference. resolveVersion :: [SourcePackage] -> Maybe Cabal.Version -> Maybe SourcePackage resolveVersion avails Nothing = Just $ maximumBy (comparing packageInfoId) avails resolveVersion avails (Just ver) = listToMaybe (filter match avails) where match avail = ver == Cabal.pkgVersion (packageInfoId avail) merge :: Verbosity -> Repo -> URI -> [String] -> FilePath -> IO () merge verbosity repo _serverURI args overlayPath = do (m_category, user_pName, m_version) <- case readPackageString args of Left err -> throwEx err Right (c,p,m_v) -> case m_v of Nothing -> return (c,p,Nothing) Just v -> case Portage.toCabalVersion v of Nothing -> throwEx (ArgumentError "illegal version") Just ver -> return (c,p,Just ver) debug verbosity $ "Category: " ++ show m_category debug verbosity $ "Package: " ++ show user_pName debug verbosity $ "Version: " ++ show m_version let (Cabal.PackageName user_pname_str) = user_pName overlay <- Overlay.loadLazy overlayPath -- portage_path <- Host.portage_dir `fmap` Host.getInfo -- portage <- Overlay.loadLazy portage_path index <- fmap packageIndex $ getSourcePackages verbosity [ repo ] -- find all packages that maches the user specified package name availablePkgs <- case map snd (Index.searchByName index user_pname_str) of [] -> throwEx (PackageNotFound user_pname_str) [pkg] -> return pkg pkgs -> do let cabal_pkg_to_pn pkg = case Cabal.pkgName (packageInfoId pkg) of Cabal.PackageName pn -> pn names = map (cabal_pkg_to_pn . L.head) pkgs notice verbosity $ "Ambiguous names: " ++ L.intercalate ", " names forM_ pkgs $ \ps -> do let p_name = (cabal_pkg_to_pn . L.head) ps notice verbosity $ p_name ++ ": " ++ (L.intercalate ", " $ map (showVersion . Cabal.pkgVersion . packageInfoId) ps) return $ concat pkgs -- select a single package taking into account the user specified version selectedPkg <- case resolveVersion availablePkgs m_version of Nothing -> do putStrLn "No such version for that package, available versions:" forM_ availablePkgs $ \ avail -> putStrLn (display . packageInfoId $ avail) throwEx (ArgumentError "no such version for that package") Just avail -> return avail -- print some info info verbosity "Selecting package:" forM_ availablePkgs $ \ avail -> do let match_text | packageInfoId avail == packageInfoId selectedPkg = "* " | otherwise = "- " info verbosity $ match_text ++ (display . packageInfoId $ avail) let cabal_pkgId = packageInfoId selectedPkg norm_pkgName = Cabal.packageName (Portage.normalizeCabalPackageId cabal_pkgId) cat <- maybe (Portage.resolveCategory verbosity overlay norm_pkgName) return m_category mergeGenericPackageDescription verbosity overlayPath cat (packageDescription selectedPkg) True mergeGenericPackageDescription :: Verbosity -> FilePath -> Portage.Category -> Cabal.GenericPackageDescription -> Bool -> IO () mergeGenericPackageDescription verbosity overlayPath cat pkgGenericDesc fetch = do overlay <- Overlay.loadLazy overlayPath let merged_cabal_pkg_name = Cabal.pkgName (Cabal.package (Cabal.packageDescription pkgGenericDesc)) let Right (pkgDesc0, flags) = Cabal.finalizePackageDescription [ -- XXX: common things we should enable/disable? -- (FlagName "small_base", True) -- try to use small base (Cabal.FlagName "cocoa", False) ] (\_dep -> True) -- (Nothing :: Maybe (Index.PackageIndex PackageIdentifier)) buildPlatform (fst GHCCore.defaultGHC) [] pkgGenericDesc mminimumGHC = GHCCore.minimumGHCVersionToBuildPackage pkgGenericDesc (compilerId, excludePkgs) = maybe GHCCore.defaultGHC id mminimumGHC (accepted_deps, skipped_deps, dropped_deps) = foldl (\(ad, sd, rd) (Cabal.Dependency pn vr) -> let dep = (Cabal.Dependency pn (Cabal.simplifyVersionRange vr)) in case () of _ | pn `elem` excludePkgs -> ( ad, dep:sd, rd) _ | pn == merged_cabal_pkg_name -> ( ad, sd, dep:rd) _ -> (dep:ad, sd, rd) ) ([],[],[]) (Cabal.buildDepends pkgDesc0) pkgDesc = pkgDesc0 { Cabal.buildDepends = accepted_deps } edeps = Merge.resolveDependencies overlay pkgDesc (Just compilerId) notice verbosity $ "Accepted depends: " ++ show (map display accepted_deps) notice verbosity $ "Skipped depends: " ++ show (map display skipped_deps) notice verbosity $ "Dropped depends: " ++ show (map display dropped_deps) notice verbosity $ "Selected flags: " ++ show flags info verbosity ("Guessing GHC version: " ++ maybe "could not guess" (display.fst) mminimumGHC) forM_ excludePkgs $ \(Cabal.PackageName name) -> info verbosity $ "Excluded packages (comes with ghc): " ++ name let p_flag (Cabal.FlagName fn, True) = fn p_flag (Cabal.FlagName fn, False) = '-':fn -- appends 's' to each line except the last one -- handy to build multiline shell expressions icalate _s [] = [] icalate _s [x] = [x] icalate s (x:xs) = (x ++ s) : icalate s xs selected_flags [] = [] selected_flags fs = icalate " \\" $ "haskell-cabal_src_configure" : map (("\t--flag=" ++) . p_flag) fs ebuild = (\e -> e { E.depend = Merge.dep edeps } ) . (\e -> e { E.depend_extra = Merge.dep_e edeps } ) . (\e -> e { E.rdepend = Merge.rdep edeps } ) . (\e -> e { E.rdepend_extra = Merge.rdep_e edeps } ) . (\e -> e { E.src_configure = selected_flags flags } ) $ C2E.cabal2ebuild pkgDesc mergeEbuild verbosity overlayPath (Portage.unCategory cat) ebuild when fetch $ do let cabal_pkgId = Cabal.packageId pkgDesc norm_pkgName = Cabal.packageName (Portage.normalizeCabalPackageId cabal_pkgId) fetchAndDigest verbosity (overlayPath display cat display norm_pkgName) fetchAndDigest :: Verbosity -> FilePath -- ^ directory of ebuild -> IO () fetchAndDigest verbosity ebuildDir = withWorkingDirectory ebuildDir $ do notice verbosity "Recalculating digests (repoman manifest)..." r <- system "repoman manifest" when (r /= ExitSuccess) $ notice verbosity "repoman manifest failed horribly. Do something about it!" return () withWorkingDirectory :: FilePath -> IO a -> IO a withWorkingDirectory newDir action = do oldDir <- getCurrentDirectory bracket (setCurrentDirectory newDir) (\_ -> setCurrentDirectory oldDir) (\_ -> action) extractKeywords :: FilePath -> String -> Maybe [String] extractKeywords ebuild_path s_ebuild = let ltrim :: String -> String ltrim = dropWhile isSpace lns = lines s_ebuild -- TODO: nicer pattern match and errno in case (findIndices (isPrefixOf "KEYWORDS=\"" . ltrim) lns) of [] -> Nothing [kw_ln] -> let kw_line = lns !! kw_ln kw_str = (fst . break (== '"') . tail . snd . break (== '"')) kw_line keywords = words kw_str in Just keywords other -> error $ ebuild_path ++ ": parse_ebuild: strange KEYWORDS lines: " ++ show other findExistingKeywords :: FilePath -> IO (Maybe [String]) findExistingKeywords edir = do ebuilds <- filter (isPrefixOf (reverse ".ebuild") . reverse) `fmap` getDirectoryContents edir -- TODO: version sort e_kw_s <- forM ebuilds $ \e -> do let e_path = edir e e_conts <- readFile e_path return (e, extractKeywords e_path e_conts) if null e_kw_s then return Nothing else return (snd $ last e_kw_s) -- "amd64" -> "~amd64" to_unstable :: String -> String to_unstable kw = case kw of '~':_ -> kw '-':_ -> kw _ -> '~':kw mergeEbuild :: Verbosity -> FilePath -> String -> E.EBuild -> IO () mergeEbuild verbosity target cat ebuild = do let edir = target cat E.name ebuild elocal = E.name ebuild ++"-"++ E.version ebuild <.> "ebuild" epath = edir elocal emeta = "metadata.xml" mpath = edir emeta default_meta = BL.pack $ Portage.makeDefaultMetadata (E.long_desc ebuild) createDirectoryIfMissing True edir existing_keywords <- findExistingKeywords edir let new_keywords = maybe (E.keywords ebuild) (map to_unstable) (existing_keywords) ebuild' = ebuild { E.keywords = new_keywords } s_ebuild' = display ebuild' notice verbosity $ "Current keywords: " ++ show existing_keywords ++ " -> " ++ show new_keywords notice verbosity $ "Writing " ++ elocal (length s_ebuild') `seq` BL.writeFile epath (BL.pack s_ebuild') yet_meta <- doesFileExist mpath if (not yet_meta) -- TODO: add --force-meta-rewrite to opts then do notice verbosity $ "Writing " ++ emeta BL.writeFile mpath default_meta else do current_meta <- BL.readFile mpath when (current_meta /= default_meta) $ notice verbosity $ "Default and current " ++ emeta ++ " differ."