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,
23 getPackageLibraryPath,
25 getPackageExtraCcOpts,
26 getPackageFrameworkPath,
28 getPreloadPackagesAnd,
35 #include "HsVersions.h"
38 import ParsePkgConf ( loadPackageConfig )
39 import DynFlags ( dopt, DynFlag(..), DynFlags(..), PackageFlag(..) )
40 import StaticFlags ( opt_Static )
41 import Config ( cProjectVersion )
42 import Name ( Name, nameModule_maybe )
47 import Maybes ( expectJust, MaybeErr(..) )
51 #if __GLASGOW_HASKELL__ >= 603
52 import System.Directory ( getAppUserDataDirectory )
54 import Compat.Directory ( getAppUserDataDirectory )
57 import System.Environment ( getEnv )
58 import Distribution.InstalledPackageInfo
59 import Distribution.Package
60 import Distribution.Version
61 import System.Directory ( doesFileExist, doesDirectoryExist,
62 getDirectoryContents )
63 import Data.Maybe ( catMaybes )
64 import Control.Monad ( foldM )
65 import Data.List ( nub, partition, sortBy, isSuffixOf )
67 import EXCEPTION ( throwDyn )
68 import ErrUtils ( debugTraceMsg, putMsg, Message )
70 -- ---------------------------------------------------------------------------
73 -- Package state is all stored in DynFlags, including the details of
74 -- all packages, which packages are exposed, and which modules they
77 -- The package state is computed by initPackages, and kept in DynFlags.
79 -- * -package <pkg> causes <pkg> to become exposed, and all other packages
80 -- with the same name to become hidden.
82 -- * -hide-package <pkg> causes <pkg> to become hidden.
84 -- * Let exposedPackages be the set of packages thus exposed.
85 -- Let depExposedPackages be the transitive closure from exposedPackages of
86 -- their dependencies.
88 -- * When searching for a module from an preload import declaration,
89 -- only the exposed modules in exposedPackages are valid.
91 -- * When searching for a module from an implicit import, all modules
92 -- from depExposedPackages are valid.
94 -- * When linking in a comp manager mode, we link in packages the
95 -- program depends on (the compiler knows this list by the
96 -- time it gets to the link step). Also, we link in all packages
97 -- which were mentioned with preload -package flags on the command-line,
98 -- or are a transitive dependency of same, or are "base"/"rts".
99 -- The reason for (b) is that we might need packages which don't
100 -- contain any Haskell modules, and therefore won't be discovered
101 -- by the normal mechanism of dependency tracking.
105 -- When compiling module A, which imports module B, we need to
106 -- know whether B will be in the same DLL as A.
107 -- If it's in the same DLL, we refer to B_f_closure
108 -- If it isn't, we refer to _imp__B_f_closure
109 -- When compiling A, we record in B's Module value whether it's
110 -- in a different DLL, by setting the DLL flag.
112 data PackageState = PackageState {
113 origPkgIdMap :: PackageConfigMap, -- PackageId -> PackageConfig
114 -- The on-disk package database
116 pkgIdMap :: PackageConfigMap, -- PackageId -> PackageConfig
117 -- The exposed flags are adjusted according to -package and
118 -- -hide-package flags, and -ignore-package removes packages.
120 preloadPackages :: [PackageId],
121 -- The packages we're going to link in eagerly. This list
122 -- should be in reverse dependency order; that is, a package
123 -- is always mentioned before the packages it depends on.
125 moduleToPkgConfAll :: UniqFM [(PackageConfig,Bool)] -- ModuleEnv mapping
126 -- Derived from pkgIdMap.
127 -- Maps Module to (pkgconf,exposed), where pkgconf is the
128 -- PackageConfig for the package containing the module, and
129 -- exposed is True if the package exposes that module.
132 -- A PackageConfigMap maps a PackageId to a PackageConfig
133 type PackageConfigMap = UniqFM PackageConfig
135 emptyPackageConfigMap :: PackageConfigMap
136 emptyPackageConfigMap = emptyUFM
138 lookupPackage :: PackageConfigMap -> PackageId -> Maybe PackageConfig
139 lookupPackage = lookupUFM
141 extendPackageConfigMap
142 :: PackageConfigMap -> [PackageConfig] -> PackageConfigMap
143 extendPackageConfigMap pkg_map new_pkgs
144 = foldl add pkg_map new_pkgs
145 where add pkg_map p = addToUFM pkg_map (packageConfigId p) p
147 getPackageDetails :: PackageState -> PackageId -> PackageConfig
148 getPackageDetails dflags ps = expectJust "getPackageDetails" (lookupPackage (pkgIdMap dflags) ps)
150 -- ----------------------------------------------------------------------------
151 -- Loading the package config files and building up the package state
153 -- | Call this after 'DynFlags.parseDynFlags'. It reads the package
154 -- configuration files, and sets up various internal tables of package
155 -- information, according to the package-related flags on the
156 -- command-line (@-package@, @-hide-package@ etc.)
158 -- Returns a list of packages to link in if we're doing dynamic linking.
159 -- This list contains the packages that the user explicitly mentioned with
162 -- 'initPackages' can be called again subsequently after updating the
163 -- 'packageFlags' field of the 'DynFlags', and it will update the
164 -- 'packageState' in 'DynFlags' and return a list of packages to
166 initPackages :: DynFlags -> IO (DynFlags, [PackageId])
167 initPackages dflags = do
168 pkg_db <- case pkgDatabase dflags of
169 Nothing -> readPackageConfigs dflags
171 (pkg_state, preload, this_pkg)
172 <- mkPackageState dflags pkg_db [] (thisPackage dflags)
173 return (dflags{ pkgState = pkg_state,
174 thisPackage = this_pkg },
177 -- -----------------------------------------------------------------------------
178 -- Reading the package database(s)
180 readPackageConfigs :: DynFlags -> IO PackageConfigMap
181 readPackageConfigs dflags = do
182 e_pkg_path <- try (getEnv "GHC_PACKAGE_PATH")
183 system_pkgconfs <- getSystemPackageConfigs dflags
185 let pkgconfs = case e_pkg_path of
186 Left _ -> system_pkgconfs
188 | last cs == "" -> init cs ++ system_pkgconfs
190 where cs = parseSearchPath path
191 -- if the path ends in a separator (eg. "/foo/bar:")
192 -- the we tack on the system paths.
194 -- Read all the ones mentioned in -package-conf flags
195 pkg_map <- foldM (readPackageConfig dflags) emptyPackageConfigMap
196 (reverse pkgconfs ++ extraPkgConfs dflags)
201 getSystemPackageConfigs :: DynFlags -> IO [FilePath]
202 getSystemPackageConfigs dflags = do
203 -- System one always comes first
204 let system_pkgconf = systemPackageConfig dflags
206 -- allow package.conf.d to contain a bunch of .conf files
207 -- containing package specifications. This is an easier way
208 -- to maintain the package database on systems with a package
209 -- management system, or systems that don't want to run ghc-pkg
210 -- to register or unregister packages. Undocumented feature for now.
211 let system_pkgconf_dir = system_pkgconf ++ ".d"
212 system_pkgconf_dir_exists <- doesDirectoryExist system_pkgconf_dir
214 if system_pkgconf_dir_exists
215 then do files <- getDirectoryContents system_pkgconf_dir
216 return [ system_pkgconf_dir ++ '/' : file
218 , isSuffixOf ".conf" file]
221 -- Read user's package conf (eg. ~/.ghc/i386-linux-6.3/package.conf)
222 -- unless the -no-user-package-conf flag was given.
223 -- We only do this when getAppUserDataDirectory is available
225 user_pkgconf <- handle (\_ -> return []) $ do
226 appdir <- getAppUserDataDirectory "ghc"
229 `joinFileName` (TARGET_ARCH ++ '-':TARGET_OS ++ '-':cProjectVersion)
230 `joinFileName` "package.conf"
231 flg <- doesFileExist pkgconf
232 if (flg && dopt Opt_ReadUserPackageConf dflags)
233 then return [pkgconf]
236 return (user_pkgconf ++ system_pkgconfs ++ [system_pkgconf])
240 :: DynFlags -> PackageConfigMap -> FilePath -> IO PackageConfigMap
241 readPackageConfig dflags pkg_map conf_file = do
242 debugTraceMsg dflags 2 (text "Using package config file:" <+> text conf_file)
243 proto_pkg_configs <- loadPackageConfig conf_file
244 let top_dir = topDir dflags
245 pkg_configs1 = mungePackagePaths top_dir proto_pkg_configs
246 pkg_configs2 = maybeHidePackages dflags pkg_configs1
247 return (extendPackageConfigMap pkg_map pkg_configs2)
249 maybeHidePackages :: DynFlags -> [PackageConfig] -> [PackageConfig]
250 maybeHidePackages dflags pkgs
251 | dopt Opt_HideAllPackages dflags = map hide pkgs
254 hide pkg = pkg{ exposed = False }
256 mungePackagePaths :: String -> [PackageConfig] -> [PackageConfig]
257 -- Replace the string "$topdir" at the beginning of a path
258 -- with the current topdir (obtained from the -B option).
259 mungePackagePaths top_dir ps = map munge_pkg ps
261 munge_pkg p = p{ importDirs = munge_paths (importDirs p),
262 includeDirs = munge_paths (includeDirs p),
263 libraryDirs = munge_paths (libraryDirs p),
264 frameworkDirs = munge_paths (frameworkDirs p) }
266 munge_paths = map munge_path
269 | Just p' <- maybePrefixMatch "$topdir" p = top_dir ++ p'
273 -- -----------------------------------------------------------------------------
274 -- Modify our copy of the package database based on a package flag
275 -- (-package, -hide-package, -ignore-package).
278 :: [PackageConfig] -- Initial database
279 -> PackageFlag -- flag to apply
280 -> IO [PackageConfig] -- new database
282 applyPackageFlag pkgs flag =
285 case matchingPackages str pkgs of
286 Nothing -> missingPackageErr str
287 Just (p:ps,qs) -> return (p':ps')
288 where p' = p {exposed=True}
289 ps' = hideAll (pkgName (package p)) (ps++qs)
292 case matchingPackages str pkgs of
293 Nothing -> missingPackageErr str
294 Just (ps,qs) -> return (map hide ps ++ qs)
295 where hide p = p {exposed=False}
298 case matchingPackages str pkgs of
299 Nothing -> return pkgs
300 Just (ps,qs) -> return qs
301 -- missing package is not an error for -ignore-package,
302 -- because a common usage is to -ignore-package P as
303 -- a preventative measure just in case P exists.
305 -- When a package is requested to be exposed, we hide all other
306 -- packages with the same name.
307 hideAll name ps = map maybe_hide ps
308 where maybe_hide p | pkgName (package p) == name = p {exposed=False}
312 matchingPackages :: String -> [PackageConfig]
313 -> Maybe ([PackageConfig], [PackageConfig])
314 matchingPackages str pkgs
315 = case partition (matches str) pkgs of
317 (ps,rest) -> Just (sortByVersion ps, rest)
319 -- A package named on the command line can either include the
320 -- version, or just the name if it is unambiguous.
322 = str == showPackageId (package p)
323 || str == pkgName (package p)
326 pickPackages pkgs strs =
327 [ p | p <- strs, Just (p:ps,_) <- [matchingPackages p pkgs] ]
329 sortByVersion = sortBy (flip (comparing (pkgVersion.package)))
330 comparing f a b = f a `compare` f b
332 -- -----------------------------------------------------------------------------
333 -- Hide old versions of packages
336 -- hide all packages for which there is also a later version
337 -- that is already exposed. This just makes it non-fatal to have two
338 -- versions of a package exposed, which can happen if you install a
339 -- later version of a package in the user database, for example.
341 hideOldPackages :: DynFlags -> [PackageConfig] -> IO [PackageConfig]
342 hideOldPackages dflags pkgs = mapM maybe_hide pkgs
344 | not (exposed p) = return p
345 | (p' : _) <- later_versions = do
346 debugTraceMsg dflags 2 $
347 (ptext SLIT("hiding package") <+>
348 text (showPackageId (package p)) <+>
349 ptext SLIT("to avoid conflict with later version") <+>
350 text (showPackageId (package p')))
351 return (p {exposed=False})
352 | otherwise = return p
353 where myname = pkgName (package p)
354 myversion = pkgVersion (package p)
355 later_versions = [ p | p <- pkgs, exposed p,
357 pkgName pkg == myname,
358 pkgVersion pkg > myversion ]
360 -- -----------------------------------------------------------------------------
365 -> [PackageConfig] -- database
366 -> [PackageIdentifier] -- preload packages
367 -> PackageId -- this package
368 -> IO ([PackageConfig],
372 findWiredInPackages dflags pkgs preload this_package = do
374 -- Now we must find our wired-in packages, and rename them to
375 -- their canonical names (eg. base-1.0 ==> base).
378 wired_in_pkgids = [ basePackageId,
383 wired_in_names = map packageIdString wired_in_pkgids
385 -- find which package corresponds to each wired-in package
386 -- delete any other packages with the same name
387 -- update the package and any dependencies to point to the new
390 -- When choosing which package to map to a wired-in package
391 -- name, we prefer exposed packages, and pick the latest
392 -- version. To override the default choice, -hide-package
393 -- could be used to hide newer versions.
395 findWiredInPackage :: [PackageConfig] -> String
396 -> IO (Maybe PackageIdentifier)
397 findWiredInPackage pkgs wired_pkg =
398 let all_ps = [ p | p <- pkgs, pkgName (package p) == wired_pkg ] in
399 case filter exposed all_ps of
402 many -> pick (head (sortByVersion many))
403 many -> pick (head (sortByVersion many))
406 debugTraceMsg dflags 2 $
407 ptext SLIT("wired-in package ")
409 <> ptext SLIT(" not found.")
412 debugTraceMsg dflags 2 $
413 ptext SLIT("wired-in package ")
415 <> ptext SLIT(" mapped to ")
416 <> text (showPackageId (package pkg))
417 return (Just (package pkg))
420 mb_wired_in_ids <- mapM (findWiredInPackage pkgs) wired_in_names
422 wired_in_ids = catMaybes mb_wired_in_ids
424 deleteOtherWiredInPackages pkgs = filter ok pkgs
425 where ok p = pkgName (package p) `notElem` wired_in_names
426 || package p `elem` wired_in_ids
428 updateWiredInDependencies pkgs = map upd_pkg pkgs
429 where upd_pkg p = p{ package = upd_pid (package p),
430 depends = map upd_pid (depends p) }
432 upd_pid pid = case filter (== pid) wired_in_ids of
434 (x:_) -> x{ pkgVersion = Version [] [] }
436 pkgs1 = deleteOtherWiredInPackages pkgs
438 pkgs2 = updateWiredInDependencies pkgs1
440 preload1 = map upd_pid preload
442 -- we must return an updated thisPackage, just in case we
443 -- are actually compiling one of the wired-in packages
444 Just old_this_pkg = unpackPackageId this_package
445 new_this_pkg = mkPackageId (upd_pid old_this_pkg)
447 return (pkgs2, preload1, new_this_pkg)
449 -- -----------------------------------------------------------------------------
451 -- Eliminate any packages which have dangling dependencies (
452 -- because the dependency was removed by -ignore-package).
457 -> [PackageId] -- ignored packages
458 -> IO [PackageConfig]
460 elimDanglingDeps dflags pkgs ignored =
461 case partition (not.null.snd) (map (getDanglingDeps pkgs ignored) pkgs) of
462 ([],ps) -> return (map fst ps)
465 elimDanglingDeps dflags (map fst qs)
466 (ignored ++ map packageConfigId (map fst ps))
468 reportElim (p, deps) =
469 debugTraceMsg dflags 2 $
470 (ptext SLIT("package") <+> pprPkg p <+>
471 ptext SLIT("will be ignored due to missing dependencies:") $$
472 nest 2 (hsep (map (text.showPackageId) deps)))
474 getDanglingDeps pkgs ignored p = (p, filter dangling (depends p))
475 where dangling pid = mkPackageId pid `elem` ignored
477 -- -----------------------------------------------------------------------------
478 -- When all the command-line options are in, we can process our package
479 -- settings and populate the package state.
483 -> PackageConfigMap -- initial database
484 -> [PackageId] -- preloaded packages
485 -> PackageId -- this package
487 [PackageId], -- new packages to preload
488 PackageId) -- this package, might be modified if the current
490 -- package is a wired-in package.
492 mkPackageState dflags orig_pkg_db preload0 this_package = do
494 -- Modify the package database according to the command-line flags
495 -- (-package, -hide-package, -ignore-package, -hide-all-packages).
497 let flags = reverse (packageFlags dflags)
498 let pkgs0 = eltsUFM orig_pkg_db
499 pkgs1 <- foldM applyPackageFlag pkgs0 flags
501 -- Here we build up a set of the packages mentioned in -package
502 -- flags on the command line; these are called the "preload"
503 -- packages. we link these packages in eagerly. The preload set
504 -- should contain at least rts & base, which is why we pretend that
505 -- the command line contains -package rts & -package base.
507 let new_preload_packages =
508 map package (pickPackages pkgs0 [ p | ExposePackage p <- flags ])
510 -- hide packages that are subsumed by later versions
511 pkgs2 <- hideOldPackages dflags pkgs1
513 -- sort out which packages are wired in
514 (pkgs3, preload1, new_this_pkg)
515 <- findWiredInPackages dflags pkgs2 new_preload_packages this_package
517 let ignored = map packageConfigId $
518 pickPackages pkgs0 [ p | IgnorePackage p <- flags ]
519 pkgs <- elimDanglingDeps dflags pkgs3 ignored
521 let pkg_db = extendPackageConfigMap emptyPackageConfigMap pkgs
522 pkgids = map packageConfigId pkgs
524 -- add base & rts to the preload packages
525 basicLinkedPackages = filter (flip elemUFM pkg_db)
526 [basePackageId,rtsPackageId]
527 preload2 = nub (basicLinkedPackages ++ map mkPackageId preload1)
529 -- Close the preload packages with their dependencies
530 dep_preload <- closeDeps pkg_db (zip preload2 (repeat Nothing))
531 let new_dep_preload = filter (`notElem` preload0) dep_preload
533 let pstate = PackageState{ preloadPackages = dep_preload,
534 origPkgIdMap = orig_pkg_db,
536 moduleToPkgConfAll = mkModuleMap pkg_db
539 return (pstate, new_dep_preload, new_this_pkg)
542 -- -----------------------------------------------------------------------------
543 -- Make the mapping from module to package info
547 -> UniqFM [(PackageConfig, Bool)]
548 mkModuleMap pkg_db = foldr extend_modmap emptyUFM pkgids
550 pkgids = map packageConfigId (eltsUFM pkg_db)
552 extend_modmap pkgid modmap =
553 addListToUFM_C (++) modmap
554 [(m, [(pkg, m `elem` exposed_mods)]) | m <- all_mods]
556 pkg = expectJust "mkModuleMap" (lookupPackage pkg_db pkgid)
557 exposed_mods = map mkModuleName (exposedModules pkg)
558 hidden_mods = map mkModuleName (hiddenModules pkg)
559 all_mods = exposed_mods ++ hidden_mods
561 pprPkg :: PackageConfig -> SDoc
562 pprPkg p = text (showPackageId (package p))
564 -- -----------------------------------------------------------------------------
565 -- Extracting information from the packages in scope
567 -- Many of these functions take a list of packages: in those cases,
568 -- the list is expected to contain the "dependent packages",
569 -- i.e. those packages that were found to be depended on by the
570 -- current module/program. These can be auto or non-auto packages, it
571 -- doesn't really matter. The list is always combined with the list
572 -- of preload (command-line) packages to determine which packages to
575 getPackageIncludePath :: DynFlags -> [PackageId] -> IO [String]
576 getPackageIncludePath dflags pkgs = do
577 ps <- getPreloadPackagesAnd dflags pkgs
578 return (nub (filter notNull (concatMap includeDirs ps)))
580 -- includes are in reverse dependency order (i.e. rts first)
581 getPackageCIncludes :: [PackageConfig] -> IO [String]
582 getPackageCIncludes pkg_configs = do
583 return (reverse (nub (filter notNull (concatMap includes pkg_configs))))
585 getPackageLibraryPath :: DynFlags -> [PackageId] -> IO [String]
586 getPackageLibraryPath dflags pkgs = do
587 ps <- getPreloadPackagesAnd dflags pkgs
588 return (nub (filter notNull (concatMap libraryDirs ps)))
590 getPackageLinkOpts :: DynFlags -> [PackageId] -> IO [String]
591 getPackageLinkOpts dflags pkgs = do
592 ps <- getPreloadPackagesAnd dflags pkgs
593 let tag = buildTag dflags
594 rts_tag = rtsBuildTag dflags
596 imp = if opt_Static then "" else "_dyn"
597 libs p = map ((++imp) . addSuffix) (hsLibraries p)
598 ++ hACK_dyn (extraLibraries p)
599 all_opts p = map ("-l" ++) (libs p) ++ ldOptions p
601 suffix = if null tag then "" else '_':tag
602 rts_suffix = if null rts_tag then "" else '_':rts_tag
604 addSuffix rts@"HSrts" = rts ++ rts_suffix
605 addSuffix other_lib = other_lib ++ suffix
607 -- This is a hack that's even more horrible (and hopefully more temporary)
608 -- than the one below [referring to previous splittage of HSbase into chunks
609 -- to work around GNU ld bug]. HSbase_cbits and friends require the _dyn suffix
610 -- for dynamic linking, but not _p or other 'way' suffix. So we just add
611 -- _dyn to extraLibraries if they already have a _cbits suffix.
614 where hack lib | not opt_Static && "_cbits" `isSuffixOf` lib = lib ++ "_dyn"
617 return (concat (map all_opts ps))
619 getPackageExtraCcOpts :: DynFlags -> [PackageId] -> IO [String]
620 getPackageExtraCcOpts dflags pkgs = do
621 ps <- getPreloadPackagesAnd dflags pkgs
622 return (concatMap ccOptions ps)
624 getPackageFrameworkPath :: DynFlags -> [PackageId] -> IO [String]
625 getPackageFrameworkPath dflags pkgs = do
626 ps <- getPreloadPackagesAnd dflags pkgs
627 return (nub (filter notNull (concatMap frameworkDirs ps)))
629 getPackageFrameworks :: DynFlags -> [PackageId] -> IO [String]
630 getPackageFrameworks dflags pkgs = do
631 ps <- getPreloadPackagesAnd dflags pkgs
632 return (concatMap frameworks ps)
634 -- -----------------------------------------------------------------------------
637 -- | Takes a Module, and if the module is in a package returns
638 -- @(pkgconf,exposed)@ where pkgconf is the PackageConfig for that package,
639 -- and exposed is True if the package exposes the module.
640 lookupModuleInAllPackages :: DynFlags -> ModuleName -> [(PackageConfig,Bool)]
641 lookupModuleInAllPackages dflags m =
642 case lookupUFM (moduleToPkgConfAll (pkgState dflags)) m of
646 getPreloadPackagesAnd :: DynFlags -> [PackageId] -> IO [PackageConfig]
647 getPreloadPackagesAnd dflags pkgids =
649 state = pkgState dflags
650 pkg_map = pkgIdMap state
651 preload = preloadPackages state
652 pairs = zip pkgids (repeat Nothing)
654 all_pkgs <- throwErr (foldM (add_package pkg_map) preload pairs)
655 return (map (getPackageDetails state) all_pkgs)
657 -- Takes a list of packages, and returns the list with dependencies included,
658 -- in reverse dependency order (a package appears before those it depends on).
659 closeDeps :: PackageConfigMap -> [(PackageId, Maybe PackageId)]
661 closeDeps pkg_map ps = throwErr (closeDepsErr pkg_map ps)
663 throwErr :: MaybeErr Message a -> IO a
664 throwErr m = case m of
665 Failed e -> throwDyn (CmdLineError (showSDoc e))
666 Succeeded r -> return r
668 closeDepsErr :: PackageConfigMap -> [(PackageId,Maybe PackageId)]
669 -> MaybeErr Message [PackageId]
670 closeDepsErr pkg_map ps = foldM (add_package pkg_map) [] ps
673 add_package :: PackageConfigMap -> [PackageId] -> (PackageId,Maybe PackageId)
674 -> MaybeErr Message [PackageId]
675 add_package pkg_db ps (p, mb_parent)
676 | p `elem` ps = return ps -- Check if we've already added this package
678 case lookupPackage pkg_db p of
679 Nothing -> Failed (missingPackageMsg (packageIdString p) <>
680 missingDependencyMsg mb_parent)
682 -- Add the package's dependents also
683 let deps = map mkPackageId (depends pkg)
684 ps' <- foldM (add_package pkg_db) ps (zip deps (repeat (Just p)))
687 missingPackageErr p = throwDyn (CmdLineError (showSDoc (missingPackageMsg p)))
688 missingPackageMsg p = ptext SLIT("unknown package:") <+> text p
690 missingDependencyMsg Nothing = empty
691 missingDependencyMsg (Just parent)
692 = space <> parens (ptext SLIT("dependency of") <+> ftext (packageIdFS parent))
694 -- -----------------------------------------------------------------------------
696 isDllName :: PackageId -> Name -> Bool
697 isDllName this_pkg name
699 | Just mod <- nameModule_maybe name = modulePackageId mod /= this_pkg
700 | otherwise = False -- no, it is not even an external name
702 -- -----------------------------------------------------------------------------
703 -- Displaying packages
705 dumpPackages :: DynFlags -> IO ()
706 -- Show package info on console, if verbosity is >= 3
708 = do let pkg_map = pkgIdMap (pkgState dflags)
710 vcat (map (text.showInstalledPackageInfo) (eltsUFM pkg_map))