2 % (c) The University of Glasgow, 2006
10 -- * The PackageConfigMap
11 PackageConfigMap, emptyPackageConfigMap, lookupPackage,
12 extendPackageConfigMap, dumpPackages,
14 -- * Reading the package config, and processing cmdline args
18 lookupModuleInAllPackages,
20 -- * Inspecting the set of packages in scope
21 getPackageIncludePath,
22 getPackageLibraryPath,
24 getPackageExtraCcOpts,
25 getPackageFrameworkPath,
27 getPreloadPackagesAnd,
34 #include "HsVersions.h"
37 import ParsePkgConf ( loadPackageConfig )
38 import DynFlags ( dopt, DynFlag(..), DynFlags(..), PackageFlag(..) )
39 import StaticFlags ( opt_Static )
40 import Config ( cProjectVersion )
41 import Name ( Name, nameModule_maybe )
45 import Maybes ( expectJust, MaybeErr(..) )
49 import System.Environment ( getEnv )
50 import Distribution.InstalledPackageInfo hiding (depends)
51 import Distribution.Package hiding (depends)
52 import Distribution.Text
53 import Distribution.Version
55 import ErrUtils ( debugTraceMsg, putMsg, Message )
57 import System.Directory
58 import System.FilePath
62 import Control.Exception ( throwDyn )
64 -- ---------------------------------------------------------------------------
67 -- Package state is all stored in DynFlags, including the details of
68 -- all packages, which packages are exposed, and which modules they
71 -- The package state is computed by initPackages, and kept in DynFlags.
73 -- * -package <pkg> causes <pkg> to become exposed, and all other packages
74 -- with the same name to become hidden.
76 -- * -hide-package <pkg> causes <pkg> to become hidden.
78 -- * Let exposedPackages be the set of packages thus exposed.
79 -- Let depExposedPackages be the transitive closure from exposedPackages of
80 -- their dependencies.
82 -- * When searching for a module from an preload import declaration,
83 -- only the exposed modules in exposedPackages are valid.
85 -- * When searching for a module from an implicit import, all modules
86 -- from depExposedPackages are valid.
88 -- * When linking in a comp manager mode, we link in packages the
89 -- program depends on (the compiler knows this list by the
90 -- time it gets to the link step). Also, we link in all packages
91 -- which were mentioned with preload -package flags on the command-line,
92 -- or are a transitive dependency of same, or are "base"/"rts".
93 -- The reason for (b) is that we might need packages which don't
94 -- contain any Haskell modules, and therefore won't be discovered
95 -- by the normal mechanism of dependency tracking.
99 -- When compiling module A, which imports module B, we need to
100 -- know whether B will be in the same DLL as A.
101 -- If it's in the same DLL, we refer to B_f_closure
102 -- If it isn't, we refer to _imp__B_f_closure
103 -- When compiling A, we record in B's Module value whether it's
104 -- in a different DLL, by setting the DLL flag.
106 data PackageState = PackageState {
107 pkgIdMap :: PackageConfigMap, -- PackageId -> PackageConfig
108 -- The exposed flags are adjusted according to -package and
109 -- -hide-package flags, and -ignore-package removes packages.
111 preloadPackages :: [PackageId],
112 -- The packages we're going to link in eagerly. This list
113 -- should be in reverse dependency order; that is, a package
114 -- is always mentioned before the packages it depends on.
116 moduleToPkgConfAll :: UniqFM [(PackageConfig,Bool)] -- ModuleEnv mapping
117 -- Derived from pkgIdMap.
118 -- Maps Module to (pkgconf,exposed), where pkgconf is the
119 -- PackageConfig for the package containing the module, and
120 -- exposed is True if the package exposes that module.
123 -- A PackageConfigMap maps a PackageId to a PackageConfig
124 type PackageConfigMap = UniqFM PackageConfig
126 emptyPackageConfigMap :: PackageConfigMap
127 emptyPackageConfigMap = emptyUFM
129 lookupPackage :: PackageConfigMap -> PackageId -> Maybe PackageConfig
130 lookupPackage = lookupUFM
132 extendPackageConfigMap
133 :: PackageConfigMap -> [PackageConfig] -> PackageConfigMap
134 extendPackageConfigMap pkg_map new_pkgs
135 = foldl add pkg_map new_pkgs
136 where add pkg_map p = addToUFM pkg_map (packageConfigId p) p
138 getPackageDetails :: PackageState -> PackageId -> PackageConfig
139 getPackageDetails dflags ps = expectJust "getPackageDetails" (lookupPackage (pkgIdMap dflags) ps)
141 -- ----------------------------------------------------------------------------
142 -- Loading the package config files and building up the package state
144 -- | Call this after 'DynFlags.parseDynFlags'. It reads the package
145 -- configuration files, and sets up various internal tables of package
146 -- information, according to the package-related flags on the
147 -- command-line (@-package@, @-hide-package@ etc.)
149 -- Returns a list of packages to link in if we're doing dynamic linking.
150 -- This list contains the packages that the user explicitly mentioned with
153 -- 'initPackages' can be called again subsequently after updating the
154 -- 'packageFlags' field of the 'DynFlags', and it will update the
155 -- 'packageState' in 'DynFlags' and return a list of packages to
157 initPackages :: DynFlags -> IO (DynFlags, [PackageId])
158 initPackages dflags = do
159 pkg_db <- case pkgDatabase dflags of
160 Nothing -> readPackageConfigs dflags
162 (pkg_state, preload, this_pkg)
163 <- mkPackageState dflags pkg_db [] (thisPackage dflags)
164 return (dflags{ pkgDatabase = Just pkg_db,
165 pkgState = pkg_state,
166 thisPackage = this_pkg },
169 -- -----------------------------------------------------------------------------
170 -- Reading the package database(s)
172 readPackageConfigs :: DynFlags -> IO PackageConfigMap
173 readPackageConfigs dflags = do
174 e_pkg_path <- try (getEnv "GHC_PACKAGE_PATH")
175 system_pkgconfs <- getSystemPackageConfigs dflags
177 let pkgconfs = case e_pkg_path of
178 Left _ -> system_pkgconfs
180 | last cs == "" -> init cs ++ system_pkgconfs
182 where cs = parseSearchPath path
183 -- if the path ends in a separator (eg. "/foo/bar:")
184 -- the we tack on the system paths.
186 -- Read all the ones mentioned in -package-conf flags
187 pkg_map <- foldM (readPackageConfig dflags) emptyPackageConfigMap
188 (reverse pkgconfs ++ extraPkgConfs dflags)
193 getSystemPackageConfigs :: DynFlags -> IO [FilePath]
194 getSystemPackageConfigs dflags = do
195 -- System one always comes first
196 let system_pkgconf = systemPackageConfig dflags
198 -- allow package.conf.d to contain a bunch of .conf files
199 -- containing package specifications. This is an easier way
200 -- to maintain the package database on systems with a package
201 -- management system, or systems that don't want to run ghc-pkg
202 -- to register or unregister packages. Undocumented feature for now.
203 let system_pkgconf_dir = system_pkgconf <.> "d"
204 system_pkgconf_dir_exists <- doesDirectoryExist system_pkgconf_dir
206 if system_pkgconf_dir_exists
207 then do files <- getDirectoryContents system_pkgconf_dir
208 return [ system_pkgconf_dir </> file
210 , takeExtension file == ".conf" ]
213 -- Read user's package conf (eg. ~/.ghc/i386-linux-6.3/package.conf)
214 -- unless the -no-user-package-conf flag was given.
215 -- We only do this when getAppUserDataDirectory is available
217 user_pkgconf <- handle (\_ -> return []) $ do
218 appdir <- getAppUserDataDirectory "ghc"
221 </> (TARGET_ARCH ++ '-':TARGET_OS ++ '-':cProjectVersion)
223 flg <- doesFileExist pkgconf
224 if (flg && dopt Opt_ReadUserPackageConf dflags)
225 then return [pkgconf]
228 return (user_pkgconf ++ system_pkgconfs ++ [system_pkgconf])
232 :: DynFlags -> PackageConfigMap -> FilePath -> IO PackageConfigMap
233 readPackageConfig dflags pkg_map conf_file = do
234 debugTraceMsg dflags 2 (text "Using package config file:" <+> text conf_file)
235 proto_pkg_configs <- loadPackageConfig dflags conf_file
236 let top_dir = topDir dflags
237 pkg_configs1 = mungePackagePaths top_dir proto_pkg_configs
238 pkg_configs2 = maybeHidePackages dflags pkg_configs1
239 return (extendPackageConfigMap pkg_map pkg_configs2)
241 maybeHidePackages :: DynFlags -> [PackageConfig] -> [PackageConfig]
242 maybeHidePackages dflags pkgs
243 | dopt Opt_HideAllPackages dflags = map hide pkgs
246 hide pkg = pkg{ exposed = False }
248 mungePackagePaths :: String -> [PackageConfig] -> [PackageConfig]
249 -- Replace the string "$topdir" at the beginning of a path
250 -- with the current topdir (obtained from the -B option).
251 mungePackagePaths top_dir ps = map munge_pkg ps
253 munge_pkg p = p{ importDirs = munge_paths (importDirs p),
254 includeDirs = munge_paths (includeDirs p),
255 libraryDirs = munge_paths (libraryDirs p),
256 frameworkDirs = munge_paths (frameworkDirs p),
257 haddockInterfaces = munge_paths (haddockInterfaces p),
258 haddockHTMLs = munge_paths (haddockHTMLs p)
261 munge_paths = map munge_path
264 | Just p' <- maybePrefixMatch "$topdir" p = top_dir ++ p'
265 | Just p' <- maybePrefixMatch "$httptopdir" p = toHttpPath top_dir ++ p'
268 toHttpPath p = "file:///" ++ p
271 -- -----------------------------------------------------------------------------
272 -- Modify our copy of the package database based on a package flag
273 -- (-package, -hide-package, -ignore-package).
276 :: [PackageConfig] -- Initial database
277 -> PackageFlag -- flag to apply
278 -> IO [PackageConfig] -- new database
280 applyPackageFlag pkgs flag =
283 case matchingPackages str pkgs of
284 Nothing -> missingPackageErr str
285 Just ([], _) -> panic "applyPackageFlag"
286 Just (p:ps,qs) -> return (p':ps')
287 where p' = p {exposed=True}
288 ps' = hideAll (pkgName (package p)) (ps++qs)
291 case matchingPackages str pkgs of
292 Nothing -> missingPackageErr str
293 Just (ps,qs) -> return (map hide ps ++ qs)
294 where hide p = p {exposed=False}
297 case matchingPackages str pkgs of
298 Nothing -> return pkgs
299 Just (_, qs) -> return qs
300 -- missing package is not an error for -ignore-package,
301 -- because a common usage is to -ignore-package P as
302 -- a preventative measure just in case P exists.
304 -- When a package is requested to be exposed, we hide all other
305 -- packages with the same name.
306 hideAll name ps = map maybe_hide ps
307 where maybe_hide p | pkgName (package p) == name = p {exposed=False}
311 matchingPackages :: String -> [PackageConfig]
312 -> Maybe ([PackageConfig], [PackageConfig])
313 matchingPackages str pkgs
314 = case partition (matches str) pkgs of
316 (ps,rest) -> Just (sortByVersion ps, rest)
318 -- A package named on the command line can either include the
319 -- version, or just the name if it is unambiguous.
321 = str == display (package p)
322 || str == display (pkgName (package p))
324 pickPackages :: [PackageConfig] -> [String] -> [PackageConfig]
325 pickPackages pkgs strs =
326 [ p | p <- strs, Just (p:_, _) <- [matchingPackages p pkgs] ]
328 sortByVersion :: [InstalledPackageInfo_ m] -> [InstalledPackageInfo_ m]
329 sortByVersion = sortBy (flip (comparing (pkgVersion.package)))
331 comparing :: Ord a => (t -> a) -> t -> t -> Ordering
332 comparing f a b = f a `compare` f b
334 -- -----------------------------------------------------------------------------
335 -- Hide old versions of packages
338 -- hide all packages for which there is also a later version
339 -- that is already exposed. This just makes it non-fatal to have two
340 -- versions of a package exposed, which can happen if you install a
341 -- later version of a package in the user database, for example.
343 hideOldPackages :: DynFlags -> [PackageConfig] -> IO [PackageConfig]
344 hideOldPackages dflags pkgs = mapM maybe_hide pkgs
346 | not (exposed p) = return p
347 | (p' : _) <- later_versions = do
348 debugTraceMsg dflags 2 $
349 (ptext (sLit "hiding package") <+>
350 text (display (package p)) <+>
351 ptext (sLit "to avoid conflict with later version") <+>
352 text (display (package p')))
353 return (p {exposed=False})
354 | otherwise = return p
355 where myname = pkgName (package p)
356 myversion = pkgVersion (package p)
357 later_versions = [ p | p <- pkgs, exposed p,
359 pkgName pkg == myname,
360 pkgVersion pkg > myversion ]
362 -- -----------------------------------------------------------------------------
367 -> [PackageConfig] -- database
368 -> [PackageIdentifier] -- preload packages
369 -> PackageId -- this package
370 -> IO ([PackageConfig],
374 findWiredInPackages dflags pkgs preload this_package = do
376 -- Now we must find our wired-in packages, and rename them to
377 -- their canonical names (eg. base-1.0 ==> base).
380 wired_in_pkgids :: [(PackageId, [String])]
381 wired_in_pkgids = [ (primPackageId, [""]),
382 (integerPackageId, [""]),
383 (basePackageId, [""]),
384 (rtsPackageId, [""]),
385 (haskell98PackageId, [""]),
387 (dphSeqPackageId, [""]),
388 (dphParPackageId, [""]),
389 (ndpPackageId, ["-seq", "-par"]) ]
391 matches :: PackageConfig -> (PackageId, [String]) -> Bool
392 pc `matches` (pid, suffixes)
393 = display (pkgName (package pc)) `elem`
394 (map (packageIdString pid ++) suffixes)
396 -- find which package corresponds to each wired-in package
397 -- delete any other packages with the same name
398 -- update the package and any dependencies to point to the new
401 -- When choosing which package to map to a wired-in package
402 -- name, we prefer exposed packages, and pick the latest
403 -- version. To override the default choice, -hide-package
404 -- could be used to hide newer versions.
406 findWiredInPackage :: [PackageConfig] -> (PackageId, [String])
407 -> IO (Maybe (PackageIdentifier, PackageId))
408 findWiredInPackage pkgs wired_pkg =
409 let all_ps = [ p | p <- pkgs, p `matches` wired_pkg ] in
410 case filter exposed all_ps of
413 many -> pick (head (sortByVersion many))
414 many -> pick (head (sortByVersion many))
416 suffixes = snd wired_pkg
418 debugTraceMsg dflags 2 $
419 ptext (sLit "wired-in package ")
420 <> ppr (fst wired_pkg)
423 else text (show suffixes))
424 <> ptext (sLit " not found.")
426 pick :: InstalledPackageInfo_ ModuleName
427 -> IO (Maybe (PackageIdentifier, PackageId))
429 debugTraceMsg dflags 2 $
430 ptext (sLit "wired-in package ")
431 <> ppr (fst wired_pkg)
432 <> ptext (sLit " mapped to ")
433 <> text (display (package pkg))
434 return (Just (package pkg, fst wired_pkg))
437 mb_wired_in_ids <- mapM (findWiredInPackage pkgs) wired_in_pkgids
439 wired_in_ids = catMaybes mb_wired_in_ids
441 deleteOtherWiredInPackages pkgs = filterOut bad pkgs
442 where bad p = any (p `matches`) wired_in_pkgids
443 && package p `notElem` map fst wired_in_ids
445 updateWiredInDependencies pkgs = map upd_pkg pkgs
446 where upd_pkg p = p{ package = upd_pid (package p),
447 depends = map upd_pid (depends p) }
449 upd_pid pid = case filter ((== pid) . fst) wired_in_ids of
451 ((x, y):_) -> x{ pkgName = PackageName (packageIdString y),
452 pkgVersion = Version [] [] }
454 pkgs1 = deleteOtherWiredInPackages pkgs
456 pkgs2 = updateWiredInDependencies pkgs1
458 preload1 = map upd_pid preload
460 -- we must return an updated thisPackage, just in case we
461 -- are actually compiling one of the wired-in packages
462 Just old_this_pkg = unpackPackageId this_package
463 new_this_pkg = mkPackageId (upd_pid old_this_pkg)
465 return (pkgs2, preload1, new_this_pkg)
467 -- ----------------------------------------------------------------------------
469 -- Detect any packages that have missing dependencies, and also any
470 -- mutually-recursive groups of packages (loops in the package graph
471 -- are not allowed). We do this by taking the least fixpoint of the
472 -- dependency graph, repeatedly adding packages whose dependencies are
473 -- satisfied until no more can be added.
478 -> [PackageId] -- ignored packages
479 -> IO [PackageConfig]
481 elimDanglingDeps dflags pkgs ignored = go [] pkgs'
483 pkgs' = filter (\p -> packageConfigId p `notElem` ignored) pkgs
486 case partitionWith (depsAvailable avail) not_avail of
487 ([], not_avail) -> do mapM_ reportElim not_avail; return avail
488 (new_avail, not_avail) -> go (new_avail ++ avail) (map fst not_avail)
490 depsAvailable :: [PackageConfig] -> PackageConfig
491 -> Either PackageConfig (PackageConfig, [PackageIdentifier])
492 depsAvailable pkgs_ok pkg
493 | null dangling = Left pkg
494 | otherwise = Right (pkg, dangling)
495 where dangling = filter (`notElem` pids) (depends pkg)
496 pids = map package pkgs_ok
498 reportElim (p, deps) =
499 debugTraceMsg dflags 2 $
500 (ptext (sLit "package") <+> pprPkg p <+>
501 ptext (sLit "will be ignored due to missing or recursive dependencies:") $$
502 nest 2 (hsep (map (text.display) deps)))
504 -- -----------------------------------------------------------------------------
505 -- When all the command-line options are in, we can process our package
506 -- settings and populate the package state.
510 -> PackageConfigMap -- initial database
511 -> [PackageId] -- preloaded packages
512 -> PackageId -- this package
514 [PackageId], -- new packages to preload
515 PackageId) -- this package, might be modified if the current
517 -- package is a wired-in package.
519 mkPackageState dflags orig_pkg_db preload0 this_package = do
521 -- Modify the package database according to the command-line flags
522 -- (-package, -hide-package, -ignore-package, -hide-all-packages).
524 let flags = reverse (packageFlags dflags)
525 let pkgs0 = eltsUFM orig_pkg_db
526 pkgs1 <- foldM applyPackageFlag pkgs0 flags
528 -- Here we build up a set of the packages mentioned in -package
529 -- flags on the command line; these are called the "preload"
530 -- packages. we link these packages in eagerly. The preload set
531 -- should contain at least rts & base, which is why we pretend that
532 -- the command line contains -package rts & -package base.
534 let new_preload_packages =
535 map package (pickPackages pkgs0 [ p | ExposePackage p <- flags ])
537 -- hide packages that are subsumed by later versions
538 pkgs2 <- hideOldPackages dflags pkgs1
540 -- sort out which packages are wired in
541 (pkgs3, preload1, new_this_pkg)
542 <- findWiredInPackages dflags pkgs2 new_preload_packages this_package
544 let ignored = map packageConfigId $
545 pickPackages pkgs0 [ p | IgnorePackage p <- flags ]
546 pkgs <- elimDanglingDeps dflags pkgs3 ignored
548 let pkg_db = extendPackageConfigMap emptyPackageConfigMap pkgs
550 -- add base & rts to the preload packages
552 | dopt Opt_AutoLinkPackages dflags
553 = filter (flip elemUFM pkg_db) [basePackageId, rtsPackageId]
555 -- but in any case remove the current package from the set of
556 -- preloaded packages so that base/rts does not end up in the
557 -- set up preloaded package when we are just building it
558 preload2 = nub (filter (/= new_this_pkg)
559 (basicLinkedPackages ++ map mkPackageId preload1))
561 -- Close the preload packages with their dependencies
562 dep_preload <- closeDeps pkg_db (zip preload2 (repeat Nothing))
563 let new_dep_preload = filter (`notElem` preload0) dep_preload
565 let pstate = PackageState{ preloadPackages = dep_preload,
567 moduleToPkgConfAll = mkModuleMap pkg_db
570 return (pstate, new_dep_preload, new_this_pkg)
573 -- -----------------------------------------------------------------------------
574 -- Make the mapping from module to package info
578 -> UniqFM [(PackageConfig, Bool)]
579 mkModuleMap pkg_db = foldr extend_modmap emptyUFM pkgids
581 pkgids = map packageConfigId (eltsUFM pkg_db)
583 extend_modmap pkgid modmap =
584 addListToUFM_C (++) modmap
585 ([(m, [(pkg, True)]) | m <- exposed_mods] ++
586 [(m, [(pkg, False)]) | m <- hidden_mods])
588 pkg = expectJust "mkModuleMap" (lookupPackage pkg_db pkgid)
589 exposed_mods = exposedModules pkg
590 hidden_mods = hiddenModules pkg
592 pprPkg :: PackageConfig -> SDoc
593 pprPkg p = text (display (package p))
595 -- -----------------------------------------------------------------------------
596 -- Extracting information from the packages in scope
598 -- Many of these functions take a list of packages: in those cases,
599 -- the list is expected to contain the "dependent packages",
600 -- i.e. those packages that were found to be depended on by the
601 -- current module/program. These can be auto or non-auto packages, it
602 -- doesn't really matter. The list is always combined with the list
603 -- of preload (command-line) packages to determine which packages to
606 getPackageIncludePath :: DynFlags -> [PackageId] -> IO [String]
607 getPackageIncludePath dflags pkgs = do
608 ps <- getPreloadPackagesAnd dflags pkgs
609 return (nub (filter notNull (concatMap includeDirs ps)))
611 getPackageLibraryPath :: DynFlags -> [PackageId] -> IO [String]
612 getPackageLibraryPath dflags pkgs = do
613 ps <- getPreloadPackagesAnd dflags pkgs
614 return (nub (filter notNull (concatMap libraryDirs ps)))
616 getPackageLinkOpts :: DynFlags -> [PackageId] -> IO [String]
617 getPackageLinkOpts dflags pkgs = do
618 ps <- getPreloadPackagesAnd dflags pkgs
619 let tag = buildTag dflags
620 rts_tag = rtsBuildTag dflags
622 mkDynName | opt_Static = id
623 | otherwise = (++ ("-ghc" ++ cProjectVersion))
624 libs p = map (mkDynName . addSuffix) (hsLibraries p)
626 all_opts p = map ("-l" ++) (libs p) ++ ldOptions p
628 addSuffix rts@"HSrts" = rts ++ (expandTag rts_tag)
629 addSuffix other_lib = other_lib ++ (expandTag tag)
631 expandTag t | null t = ""
634 return (concat (map all_opts ps))
636 getPackageExtraCcOpts :: DynFlags -> [PackageId] -> IO [String]
637 getPackageExtraCcOpts dflags pkgs = do
638 ps <- getPreloadPackagesAnd dflags pkgs
639 return (concatMap ccOptions ps)
641 getPackageFrameworkPath :: DynFlags -> [PackageId] -> IO [String]
642 getPackageFrameworkPath dflags pkgs = do
643 ps <- getPreloadPackagesAnd dflags pkgs
644 return (nub (filter notNull (concatMap frameworkDirs ps)))
646 getPackageFrameworks :: DynFlags -> [PackageId] -> IO [String]
647 getPackageFrameworks dflags pkgs = do
648 ps <- getPreloadPackagesAnd dflags pkgs
649 return (concatMap frameworks ps)
651 -- -----------------------------------------------------------------------------
654 -- | Takes a Module, and if the module is in a package returns
655 -- @(pkgconf,exposed)@ where pkgconf is the PackageConfig for that package,
656 -- and exposed is True if the package exposes the module.
657 lookupModuleInAllPackages :: DynFlags -> ModuleName -> [(PackageConfig,Bool)]
658 lookupModuleInAllPackages dflags m =
659 case lookupUFM (moduleToPkgConfAll (pkgState dflags)) m of
663 getPreloadPackagesAnd :: DynFlags -> [PackageId] -> IO [PackageConfig]
664 getPreloadPackagesAnd dflags pkgids =
666 state = pkgState dflags
667 pkg_map = pkgIdMap state
668 preload = preloadPackages state
669 pairs = zip pkgids (repeat Nothing)
671 all_pkgs <- throwErr (foldM (add_package pkg_map) preload pairs)
672 return (map (getPackageDetails state) all_pkgs)
674 -- Takes a list of packages, and returns the list with dependencies included,
675 -- in reverse dependency order (a package appears before those it depends on).
676 closeDeps :: PackageConfigMap -> [(PackageId, Maybe PackageId)]
678 closeDeps pkg_map ps = throwErr (closeDepsErr pkg_map ps)
680 throwErr :: MaybeErr Message a -> IO a
681 throwErr m = case m of
682 Failed e -> throwDyn (CmdLineError (showSDoc e))
683 Succeeded r -> return r
685 closeDepsErr :: PackageConfigMap -> [(PackageId,Maybe PackageId)]
686 -> MaybeErr Message [PackageId]
687 closeDepsErr pkg_map ps = foldM (add_package pkg_map) [] ps
690 add_package :: PackageConfigMap -> [PackageId] -> (PackageId,Maybe PackageId)
691 -> MaybeErr Message [PackageId]
692 add_package pkg_db ps (p, mb_parent)
693 | p `elem` ps = return ps -- Check if we've already added this package
695 case lookupPackage pkg_db p of
696 Nothing -> Failed (missingPackageMsg (packageIdString p) <>
697 missingDependencyMsg mb_parent)
699 -- Add the package's dependents also
700 let deps = map mkPackageId (depends pkg)
701 ps' <- foldM (add_package pkg_db) ps (zip deps (repeat (Just p)))
704 missingPackageErr :: String -> IO [PackageConfig]
705 missingPackageErr p = throwDyn (CmdLineError (showSDoc (missingPackageMsg p)))
707 missingPackageMsg :: String -> SDoc
708 missingPackageMsg p = ptext (sLit "unknown package:") <+> text p
710 missingDependencyMsg :: Maybe PackageId -> SDoc
711 missingDependencyMsg Nothing = empty
712 missingDependencyMsg (Just parent)
713 = space <> parens (ptext (sLit "dependency of") <+> ftext (packageIdFS parent))
715 -- -----------------------------------------------------------------------------
717 isDllName :: PackageId -> Name -> Bool
718 isDllName this_pkg name
720 | Just mod <- nameModule_maybe name = modulePackageId mod /= this_pkg
721 | otherwise = False -- no, it is not even an external name
723 -- -----------------------------------------------------------------------------
724 -- Displaying packages
726 dumpPackages :: DynFlags -> IO ()
727 -- Show package info on console, if verbosity is >= 3
729 = do let pkg_map = pkgIdMap (pkgState dflags)
731 vcat (map (text . showInstalledPackageInfo
732 . packageConfigToInstalledPackageInfo)