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Diffstat (limited to 'compiler/main/Packages.lhs')
| -rw-r--r-- | compiler/main/Packages.lhs | 705 |
1 files changed, 705 insertions, 0 deletions
diff --git a/compiler/main/Packages.lhs b/compiler/main/Packages.lhs new file mode 100644 index 0000000000..ae6b18863e --- /dev/null +++ b/compiler/main/Packages.lhs @@ -0,0 +1,705 @@ +% +% (c) The University of Glasgow, 2000 +% +\section{Package manipulation} + +\begin{code} +module Packages ( + module PackageConfig, + + -- * The PackageConfigMap + PackageConfigMap, emptyPackageConfigMap, lookupPackage, + extendPackageConfigMap, dumpPackages, + + -- * Reading the package config, and processing cmdline args + PackageIdH(..), isHomePackage, + PackageState(..), + mkPackageState, + initPackages, + getPackageDetails, + checkForPackageConflicts, + lookupModuleInAllPackages, + + HomeModules, mkHomeModules, isHomeModule, + + -- * Inspecting the set of packages in scope + getPackageIncludePath, + getPackageCIncludes, + getPackageLibraryPath, + getPackageLinkOpts, + getPackageExtraCcOpts, + getPackageFrameworkPath, + getPackageFrameworks, + getExplicitPackagesAnd, + + -- * Utils + isDllName + ) +where + +#include "HsVersions.h" + +import PackageConfig +import SysTools ( getTopDir, getPackageConfigPath ) +import ParsePkgConf ( loadPackageConfig ) +import DynFlags ( dopt, DynFlag(..), DynFlags(..), PackageFlag(..) ) +import StaticFlags ( opt_Static ) +import Config ( cProjectVersion ) +import Name ( Name, nameModule_maybe ) +import UniqFM +import Module +import FiniteMap +import UniqSet +import Util +import Maybes ( expectJust, MaybeErr(..) ) +import Panic +import Outputable + +#if __GLASGOW_HASKELL__ >= 603 +import System.Directory ( getAppUserDataDirectory ) +#else +import Compat.Directory ( getAppUserDataDirectory ) +#endif + +import System.Environment ( getEnv ) +import Distribution.InstalledPackageInfo +import Distribution.Package +import Distribution.Version +import System.Directory ( doesFileExist, doesDirectoryExist, + getDirectoryContents ) +import Control.Monad ( foldM ) +import Data.List ( nub, partition, sortBy, isSuffixOf ) +import FastString +import EXCEPTION ( throwDyn ) +import ErrUtils ( debugTraceMsg, putMsg, Message ) + +-- --------------------------------------------------------------------------- +-- The Package state + +-- Package state is all stored in DynFlags, including the details of +-- all packages, which packages are exposed, and which modules they +-- provide. + +-- The package state is computed by initPackages, and kept in DynFlags. +-- +-- * -package <pkg> causes <pkg> to become exposed, and all other packages +-- with the same name to become hidden. +-- +-- * -hide-package <pkg> causes <pkg> to become hidden. +-- +-- * Let exposedPackages be the set of packages thus exposed. +-- Let depExposedPackages be the transitive closure from exposedPackages of +-- their dependencies. +-- +-- * It is an error for any two packages in depExposedPackages to provide the +-- same module. +-- +-- * When searching for a module from an explicit import declaration, +-- only the exposed modules in exposedPackages are valid. +-- +-- * When searching for a module from an implicit import, all modules +-- from depExposedPackages are valid. +-- +-- * When linking in a comp manager mode, we link in packages the +-- program depends on (the compiler knows this list by the +-- time it gets to the link step). Also, we link in all packages +-- which were mentioned with explicit -package flags on the command-line, +-- or are a transitive dependency of same, or are "base"/"rts". +-- The reason for (b) is that we might need packages which don't +-- contain any Haskell modules, and therefore won't be discovered +-- by the normal mechanism of dependency tracking. + + +-- One important thing that the package state provides is a way to +-- tell, for a given module, whether it is part of the current package +-- or not. We need to know this for two reasons: +-- +-- * generating cross-DLL calls is different from intra-DLL calls +-- (see below). +-- * we don't record version information in interface files for entities +-- in a different package. +-- +-- Notes on DLLs +-- ~~~~~~~~~~~~~ +-- When compiling module A, which imports module B, we need to +-- know whether B will be in the same DLL as A. +-- If it's in the same DLL, we refer to B_f_closure +-- If it isn't, we refer to _imp__B_f_closure +-- When compiling A, we record in B's Module value whether it's +-- in a different DLL, by setting the DLL flag. + +data PackageState = PackageState { + + explicitPackages :: [PackageId], + -- The packages we're going to link in eagerly. This list + -- should be in reverse dependency order; that is, a package + -- is always mentioned before the packages it depends on. + + origPkgIdMap :: PackageConfigMap, -- PackageId -> PackageConfig + -- the full package database + + pkgIdMap :: PackageConfigMap, -- PackageId -> PackageConfig + -- Derived from origPkgIdMap. + -- The exposed flags are adjusted according to -package and + -- -hide-package flags, and -ignore-package removes packages. + + moduleToPkgConfAll :: ModuleEnv [(PackageConfig,Bool)], + -- Derived from pkgIdMap. + -- Maps Module to (pkgconf,exposed), where pkgconf is the + -- PackageConfig for the package containing the module, and + -- exposed is True if the package exposes that module. + + -- The PackageIds of some known packages + basePackageId :: PackageIdH, + rtsPackageId :: PackageIdH, + haskell98PackageId :: PackageIdH, + thPackageId :: PackageIdH + } + +data PackageIdH + = HomePackage -- The "home" package is the package curently + -- being compiled + | ExtPackage PackageId -- An "external" package is any other package + + +isHomePackage :: PackageIdH -> Bool +isHomePackage HomePackage = True +isHomePackage (ExtPackage _) = False + +-- A PackageConfigMap maps a PackageId to a PackageConfig +type PackageConfigMap = UniqFM PackageConfig + +emptyPackageConfigMap :: PackageConfigMap +emptyPackageConfigMap = emptyUFM + +lookupPackage :: PackageConfigMap -> PackageId -> Maybe PackageConfig +lookupPackage = lookupUFM + +extendPackageConfigMap + :: PackageConfigMap -> [PackageConfig] -> PackageConfigMap +extendPackageConfigMap pkg_map new_pkgs + = foldl add pkg_map new_pkgs + where add pkg_map p = addToUFM pkg_map (packageConfigId p) p + +getPackageDetails :: PackageState -> PackageId -> PackageConfig +getPackageDetails dflags ps = expectJust "getPackageDetails" (lookupPackage (pkgIdMap dflags) ps) + +-- ---------------------------------------------------------------------------- +-- Loading the package config files and building up the package state + +-- | Call this after parsing the DynFlags. It reads the package +-- configuration files, and sets up various internal tables of package +-- information, according to the package-related flags on the +-- command-line (@-package@, @-hide-package@ etc.) +initPackages :: DynFlags -> IO DynFlags +initPackages dflags = do + pkg_map <- readPackageConfigs dflags; + state <- mkPackageState dflags pkg_map + return dflags{ pkgState = state } + +-- ----------------------------------------------------------------------------- +-- Reading the package database(s) + +readPackageConfigs :: DynFlags -> IO PackageConfigMap +readPackageConfigs dflags = do + e_pkg_path <- try (getEnv "GHC_PACKAGE_PATH") + system_pkgconfs <- getSystemPackageConfigs dflags + + let pkgconfs = case e_pkg_path of + Left _ -> system_pkgconfs + Right path + | last cs == "" -> init cs ++ system_pkgconfs + | otherwise -> cs + where cs = parseSearchPath path + -- if the path ends in a separator (eg. "/foo/bar:") + -- the we tack on the system paths. + + -- Read all the ones mentioned in -package-conf flags + pkg_map <- foldM (readPackageConfig dflags) emptyPackageConfigMap + (reverse pkgconfs ++ extraPkgConfs dflags) + + return pkg_map + + +getSystemPackageConfigs :: DynFlags -> IO [FilePath] +getSystemPackageConfigs dflags = do + -- System one always comes first + system_pkgconf <- getPackageConfigPath + + -- allow package.conf.d to contain a bunch of .conf files + -- containing package specifications. This is an easier way + -- to maintain the package database on systems with a package + -- management system, or systems that don't want to run ghc-pkg + -- to register or unregister packages. Undocumented feature for now. + let system_pkgconf_dir = system_pkgconf ++ ".d" + system_pkgconf_dir_exists <- doesDirectoryExist system_pkgconf_dir + system_pkgconfs <- + if system_pkgconf_dir_exists + then do files <- getDirectoryContents system_pkgconf_dir + return [ system_pkgconf_dir ++ '/' : file + | file <- files + , isSuffixOf ".conf" file] + else return [] + + -- Read user's package conf (eg. ~/.ghc/i386-linux-6.3/package.conf) + -- unless the -no-user-package-conf flag was given. + -- We only do this when getAppUserDataDirectory is available + -- (GHC >= 6.3). + user_pkgconf <- handle (\_ -> return []) $ do + appdir <- getAppUserDataDirectory "ghc" + let + pkgconf = appdir + `joinFileName` (TARGET_ARCH ++ '-':TARGET_OS ++ '-':cProjectVersion) + `joinFileName` "package.conf" + flg <- doesFileExist pkgconf + if (flg && dopt Opt_ReadUserPackageConf dflags) + then return [pkgconf] + else return [] + + return (user_pkgconf ++ system_pkgconfs ++ [system_pkgconf]) + + +readPackageConfig + :: DynFlags -> PackageConfigMap -> FilePath -> IO PackageConfigMap +readPackageConfig dflags pkg_map conf_file = do + debugTraceMsg dflags 2 (text "Using package config file:" <+> text conf_file) + proto_pkg_configs <- loadPackageConfig conf_file + top_dir <- getTopDir + let pkg_configs1 = mungePackagePaths top_dir proto_pkg_configs + pkg_configs2 = maybeHidePackages dflags pkg_configs1 + return (extendPackageConfigMap pkg_map pkg_configs2) + +maybeHidePackages :: DynFlags -> [PackageConfig] -> [PackageConfig] +maybeHidePackages dflags pkgs + | dopt Opt_HideAllPackages dflags = map hide pkgs + | otherwise = pkgs + where + hide pkg = pkg{ exposed = False } + +mungePackagePaths :: String -> [PackageConfig] -> [PackageConfig] +-- Replace the string "$topdir" at the beginning of a path +-- with the current topdir (obtained from the -B option). +mungePackagePaths top_dir ps = map munge_pkg ps + where + munge_pkg p = p{ importDirs = munge_paths (importDirs p), + includeDirs = munge_paths (includeDirs p), + libraryDirs = munge_paths (libraryDirs p), + frameworkDirs = munge_paths (frameworkDirs p) } + + munge_paths = map munge_path + + munge_path p + | Just p' <- maybePrefixMatch "$topdir" p = top_dir ++ p' + | otherwise = p + + +-- ----------------------------------------------------------------------------- +-- When all the command-line options are in, we can process our package +-- settings and populate the package state. + +mkPackageState :: DynFlags -> PackageConfigMap -> IO PackageState +mkPackageState dflags orig_pkg_db = do + -- + -- Modify the package database according to the command-line flags + -- (-package, -hide-package, -ignore-package, -hide-all-packages). + -- + -- Also, here we build up a set of the packages mentioned in -package + -- flags on the command line; these are called the "explicit" packages. + -- we link these packages in eagerly. The explicit set should contain + -- at least rts & base, which is why we pretend that the command line + -- contains -package rts & -package base. + -- + let + flags = reverse (packageFlags dflags) + + procflags pkgs expl [] = return (pkgs,expl) + procflags pkgs expl (ExposePackage str : flags) = do + case pick str pkgs of + Nothing -> missingPackageErr str + Just (p,ps) -> procflags (p':ps') expl' flags + where pkgid = packageConfigId p + p' = p {exposed=True} + ps' = hideAll (pkgName (package p)) ps + expl' = addOneToUniqSet expl pkgid + procflags pkgs expl (HidePackage str : flags) = do + case partition (matches str) pkgs of + ([],_) -> missingPackageErr str + (ps,qs) -> procflags (map hide ps ++ qs) expl flags + where hide p = p {exposed=False} + procflags pkgs expl (IgnorePackage str : flags) = do + case partition (matches str) pkgs of + (ps,qs) -> procflags qs expl flags + -- missing package is not an error for -ignore-package, + -- because a common usage is to -ignore-package P as + -- a preventative measure just in case P exists. + + pick str pkgs + = case partition (matches str) pkgs of + ([],_) -> Nothing + (ps,rest) -> + case sortBy (flip (comparing (pkgVersion.package))) ps of + (p:ps) -> Just (p, ps ++ rest) + _ -> panic "Packages.pick" + + comparing f a b = f a `compare` f b + + -- A package named on the command line can either include the + -- version, or just the name if it is unambiguous. + matches str p + = str == showPackageId (package p) + || str == pkgName (package p) + + -- When a package is requested to be exposed, we hide all other + -- packages with the same name. + hideAll name ps = map maybe_hide ps + where maybe_hide p | pkgName (package p) == name = p {exposed=False} + | otherwise = p + -- + (pkgs1,explicit) <- procflags (eltsUFM orig_pkg_db) emptyUniqSet flags + -- + -- hide all packages for which there is also a later version + -- that is already exposed. This just makes it non-fatal to have two + -- versions of a package exposed, which can happen if you install a + -- later version of a package in the user database, for example. + -- + let maybe_hide p + | not (exposed p) = return p + | (p' : _) <- later_versions = do + debugTraceMsg dflags 2 $ + (ptext SLIT("hiding package") <+> text (showPackageId (package p)) <+> + ptext SLIT("to avoid conflict with later version") <+> + text (showPackageId (package p'))) + return (p {exposed=False}) + | otherwise = return p + where myname = pkgName (package p) + myversion = pkgVersion (package p) + later_versions = [ p | p <- pkgs1, exposed p, + let pkg = package p, + pkgName pkg == myname, + pkgVersion pkg > myversion ] + a_later_version_is_exposed + = not (null later_versions) + + pkgs2 <- mapM maybe_hide pkgs1 + -- + -- Eliminate any packages which have dangling dependencies (perhaps + -- because the package was removed by -ignore-package). + -- + let + elimDanglingDeps pkgs = + case partition (not.null.snd) (map (getDanglingDeps pkgs) pkgs) of + ([],ps) -> return (map fst ps) + (ps,qs) -> do + mapM_ reportElim ps + elimDanglingDeps (map fst qs) + + reportElim (p, deps) = + debugTraceMsg dflags 2 $ + (ptext SLIT("package") <+> pprPkg p <+> + ptext SLIT("will be ignored due to missing dependencies:") $$ + nest 2 (hsep (map (text.showPackageId) deps))) + + getDanglingDeps pkgs p = (p, filter dangling (depends p)) + where dangling pid = pid `notElem` all_pids + all_pids = map package pkgs + -- + pkgs <- elimDanglingDeps pkgs2 + let pkg_db = extendPackageConfigMap emptyPackageConfigMap pkgs + -- + -- Find the transitive closure of dependencies of exposed + -- + let exposed_pkgids = [ packageConfigId p | p <- pkgs, exposed p ] + dep_exposed <- closeDeps pkg_db exposed_pkgids + -- + -- Look up some known PackageIds + -- + let + lookupPackageByName :: FastString -> PackageIdH + lookupPackageByName nm = + case [ conf | p <- dep_exposed, + Just conf <- [lookupPackage pkg_db p], + nm == mkFastString (pkgName (package conf)) ] of + [] -> HomePackage + (p:ps) -> ExtPackage (mkPackageId (package p)) + + -- Get the PackageIds for some known packages (we know the names, + -- but we don't know the versions). Some of these packages might + -- not exist in the database, so they are Maybes. + basePackageId = lookupPackageByName basePackageName + rtsPackageId = lookupPackageByName rtsPackageName + haskell98PackageId = lookupPackageByName haskell98PackageName + thPackageId = lookupPackageByName thPackageName + + -- add base & rts to the explicit packages + basicLinkedPackages = [basePackageId,rtsPackageId] + explicit' = addListToUniqSet explicit + [ p | ExtPackage p <- basicLinkedPackages ] + -- + -- Close the explicit packages with their dependencies + -- + dep_explicit <- closeDeps pkg_db (uniqSetToList explicit') + -- + -- Build up a mapping from Module -> PackageConfig for all modules. + -- Discover any conflicts at the same time, and factor in the new exposed + -- status of each package. + -- + let mod_map = mkModuleMap pkg_db dep_exposed + + return PackageState{ explicitPackages = dep_explicit, + origPkgIdMap = orig_pkg_db, + pkgIdMap = pkg_db, + moduleToPkgConfAll = mod_map, + basePackageId = basePackageId, + rtsPackageId = rtsPackageId, + haskell98PackageId = haskell98PackageId, + thPackageId = thPackageId + } + -- done! + +basePackageName = FSLIT("base") +rtsPackageName = FSLIT("rts") +haskell98PackageName = FSLIT("haskell98") +thPackageName = FSLIT("template-haskell") + -- Template Haskell libraries in here + +mkModuleMap + :: PackageConfigMap + -> [PackageId] + -> ModuleEnv [(PackageConfig, Bool)] +mkModuleMap pkg_db pkgs = foldr extend_modmap emptyUFM pkgs + where + extend_modmap pkgname modmap = + addListToUFM_C (++) modmap + [(m, [(pkg, m `elem` exposed_mods)]) | m <- all_mods] + where + pkg = expectJust "mkModuleMap" (lookupPackage pkg_db pkgname) + exposed_mods = map mkModule (exposedModules pkg) + hidden_mods = map mkModule (hiddenModules pkg) + all_mods = exposed_mods ++ hidden_mods + +-- ----------------------------------------------------------------------------- +-- Check for conflicts in the program. + +-- | A conflict arises if the program contains two modules with the same +-- name, which can arise if the program depends on multiple packages that +-- expose the same module, or if the program depends on a package that +-- contains a module also present in the program (the "home package"). +-- +checkForPackageConflicts + :: DynFlags + -> [Module] -- modules in the home package + -> [PackageId] -- packages on which the program depends + -> MaybeErr Message () + +checkForPackageConflicts dflags mods pkgs = do + let + state = pkgState dflags + pkg_db = pkgIdMap state + -- + dep_pkgs <- closeDepsErr pkg_db pkgs + + let + extend_modmap pkgname modmap = + addListToFM_C (++) modmap + [(m, [(pkg, m `elem` exposed_mods)]) | m <- all_mods] + where + pkg = expectJust "checkForPackageConflicts" + (lookupPackage pkg_db pkgname) + exposed_mods = map mkModule (exposedModules pkg) + hidden_mods = map mkModule (hiddenModules pkg) + all_mods = exposed_mods ++ hidden_mods + + mod_map = foldr extend_modmap emptyFM pkgs + mod_map_list :: [(Module,[(PackageConfig,Bool)])] + mod_map_list = fmToList mod_map + + overlaps = [ (m, map fst ps) | (m,ps@(_:_:_)) <- mod_map_list ] + -- + if not (null overlaps) + then Failed (pkgOverlapError overlaps) + else do + + let + overlap_mods = [ (mod,pkg) + | mod <- mods, + Just ((pkg,_):_) <- [lookupFM mod_map mod] ] + -- will be only one package here + if not (null overlap_mods) + then Failed (modOverlapError overlap_mods) + else do + + return () + +pkgOverlapError overlaps = vcat (map msg overlaps) + where + msg (mod,pkgs) = + text "conflict: module" <+> quotes (ppr mod) + <+> ptext SLIT("is present in multiple packages:") + <+> hsep (punctuate comma (map pprPkg pkgs)) + +modOverlapError overlaps = vcat (map msg overlaps) + where + msg (mod,pkg) = fsep [ + text "conflict: module", + quotes (ppr mod), + ptext SLIT("belongs to the current program/library"), + ptext SLIT("and also to package"), + pprPkg pkg ] + +pprPkg :: PackageConfig -> SDoc +pprPkg p = text (showPackageId (package p)) + +-- ----------------------------------------------------------------------------- +-- Extracting information from the packages in scope + +-- Many of these functions take a list of packages: in those cases, +-- the list is expected to contain the "dependent packages", +-- i.e. those packages that were found to be depended on by the +-- current module/program. These can be auto or non-auto packages, it +-- doesn't really matter. The list is always combined with the list +-- of explicit (command-line) packages to determine which packages to +-- use. + +getPackageIncludePath :: DynFlags -> [PackageId] -> IO [String] +getPackageIncludePath dflags pkgs = do + ps <- getExplicitPackagesAnd dflags pkgs + return (nub (filter notNull (concatMap includeDirs ps))) + + -- includes are in reverse dependency order (i.e. rts first) +getPackageCIncludes :: [PackageConfig] -> IO [String] +getPackageCIncludes pkg_configs = do + return (reverse (nub (filter notNull (concatMap includes pkg_configs)))) + +getPackageLibraryPath :: DynFlags -> [PackageId] -> IO [String] +getPackageLibraryPath dflags pkgs = do + ps <- getExplicitPackagesAnd dflags pkgs + return (nub (filter notNull (concatMap libraryDirs ps))) + +getPackageLinkOpts :: DynFlags -> [PackageId] -> IO [String] +getPackageLinkOpts dflags pkgs = do + ps <- getExplicitPackagesAnd dflags pkgs + let tag = buildTag dflags + rts_tag = rtsBuildTag dflags + let + imp = if opt_Static then "" else "_dyn" + libs p = map ((++imp) . addSuffix) (hsLibraries p) + ++ hACK_dyn (extraLibraries p) + all_opts p = map ("-l" ++) (libs p) ++ ldOptions p + + suffix = if null tag then "" else '_':tag + rts_suffix = if null rts_tag then "" else '_':rts_tag + + addSuffix rts@"HSrts" = rts ++ rts_suffix + addSuffix other_lib = other_lib ++ suffix + + -- This is a hack that's even more horrible (and hopefully more temporary) + -- than the one below [referring to previous splittage of HSbase into chunks + -- to work around GNU ld bug]. HSbase_cbits and friends require the _dyn suffix + -- for dynamic linking, but not _p or other 'way' suffix. So we just add + -- _dyn to extraLibraries if they already have a _cbits suffix. + + hACK_dyn = map hack + where hack lib | not opt_Static && "_cbits" `isSuffixOf` lib = lib ++ "_dyn" + | otherwise = lib + + return (concat (map all_opts ps)) + +getPackageExtraCcOpts :: DynFlags -> [PackageId] -> IO [String] +getPackageExtraCcOpts dflags pkgs = do + ps <- getExplicitPackagesAnd dflags pkgs + return (concatMap ccOptions ps) + +getPackageFrameworkPath :: DynFlags -> [PackageId] -> IO [String] +getPackageFrameworkPath dflags pkgs = do + ps <- getExplicitPackagesAnd dflags pkgs + return (nub (filter notNull (concatMap frameworkDirs ps))) + +getPackageFrameworks :: DynFlags -> [PackageId] -> IO [String] +getPackageFrameworks dflags pkgs = do + ps <- getExplicitPackagesAnd dflags pkgs + return (concatMap frameworks ps) + +-- ----------------------------------------------------------------------------- +-- Package Utils + +-- | Takes a Module, and if the module is in a package returns +-- @(pkgconf,exposed)@ where pkgconf is the PackageConfig for that package, +-- and exposed is True if the package exposes the module. +lookupModuleInAllPackages :: DynFlags -> Module -> [(PackageConfig,Bool)] +lookupModuleInAllPackages dflags m = + case lookupModuleEnv (moduleToPkgConfAll (pkgState dflags)) m of + Nothing -> [] + Just ps -> ps + +getExplicitPackagesAnd :: DynFlags -> [PackageId] -> IO [PackageConfig] +getExplicitPackagesAnd dflags pkgids = + let + state = pkgState dflags + pkg_map = pkgIdMap state + expl = explicitPackages state + in do + all_pkgs <- throwErr (foldM (add_package pkg_map) expl pkgids) + return (map (getPackageDetails state) all_pkgs) + +-- Takes a list of packages, and returns the list with dependencies included, +-- in reverse dependency order (a package appears before those it depends on). +closeDeps :: PackageConfigMap -> [PackageId] -> IO [PackageId] +closeDeps pkg_map ps = throwErr (closeDepsErr pkg_map ps) + +throwErr :: MaybeErr Message a -> IO a +throwErr m = case m of + Failed e -> throwDyn (CmdLineError (showSDoc e)) + Succeeded r -> return r + +closeDepsErr :: PackageConfigMap -> [PackageId] + -> MaybeErr Message [PackageId] +closeDepsErr pkg_map ps = foldM (add_package pkg_map) [] ps + +-- internal helper +add_package :: PackageConfigMap -> [PackageId] -> PackageId + -> MaybeErr Message [PackageId] +add_package pkg_db ps p + | p `elem` ps = return ps -- Check if we've already added this package + | otherwise = + case lookupPackage pkg_db p of + Nothing -> Failed (missingPackageMsg (packageIdString p)) + Just pkg -> do + -- Add the package's dependents also + let deps = map mkPackageId (depends pkg) + ps' <- foldM (add_package pkg_db) ps deps + return (p : ps') + +missingPackageErr p = throwDyn (CmdLineError (showSDoc (missingPackageMsg p))) +missingPackageMsg p = ptext SLIT("unknown package:") <+> text p + +-- ----------------------------------------------------------------------------- +-- The home module set + +newtype HomeModules = HomeModules ModuleSet + +mkHomeModules :: [Module] -> HomeModules +mkHomeModules = HomeModules . mkModuleSet + +isHomeModule :: HomeModules -> Module -> Bool +isHomeModule (HomeModules set) mod = elemModuleSet mod set + +-- Determining whether a Name refers to something in another package or not. +-- Cross-package references need to be handled differently when dynamically- +-- linked libraries are involved. + +isDllName :: HomeModules -> Name -> Bool +isDllName pdeps name + | opt_Static = False + | Just mod <- nameModule_maybe name = not (isHomeModule pdeps mod) + | otherwise = False -- no, it is not even an external name + +-- ----------------------------------------------------------------------------- +-- Displaying packages + +dumpPackages :: DynFlags -> IO () +-- Show package info on console, if verbosity is >= 3 +dumpPackages dflags + = do let pkg_map = pkgIdMap (pkgState dflags) + putMsg dflags $ + vcat (map (text.showInstalledPackageInfo) (eltsUFM pkg_map)) +\end{code} |