PackageState(..),
initPackages,
getPackageDetails,
- lookupModuleInAllPackages,
+ lookupModuleInAllPackages, lookupModuleWithSuggestions,
-- * Inspecting the set of packages in scope
getPackageIncludePath,
initPackages dflags = do
pkg_db <- case pkgDatabase dflags of
Nothing -> readPackageConfigs dflags
- Just db -> return db
+ Just db -> return $ maybeHidePackages dflags db
(pkg_state, preload, this_pkg)
<- mkPackageState dflags pkg_db [] (thisPackage dflags)
return (dflags{ pkgDatabase = Just pkg_db,
packageFlagErr :: PackageFlag
-> [(PackageConfig, UnusablePackageReason)]
-> IO a
+
+-- for missing DPH package we emit a more helpful error message, because
+-- this may be the result of using -fdph-par or -fdph-seq.
+packageFlagErr (ExposePackage pkg) [] | is_dph_package pkg
+ = ghcError (CmdLineError (showSDoc $ dph_err))
+ where dph_err = text "the " <> text pkg <> text " package is not installed."
+ $$ text "To install it: \"cabal install dph\"."
+ is_dph_package pkg = "dph" `isPrefixOf` pkg
+
packageFlagErr flag reasons = ghcError (CmdLineError (showSDoc $ err))
where err = text "cannot satisfy " <> ppr_flag <>
(if null reasons then empty else text ": ") $$
integerPackageId,
basePackageId,
rtsPackageId,
- haskell98PackageId,
thPackageId,
dphSeqPackageId,
dphParPackageId ]
-- @(pkgconf, exposed)@ where pkgconf is the PackageConfig for that package,
-- and exposed is @True@ if the package exposes the module.
lookupModuleInAllPackages :: DynFlags -> ModuleName -> [(PackageConfig,Bool)]
-lookupModuleInAllPackages dflags m =
- case lookupUFM (moduleToPkgConfAll (pkgState dflags)) m of
- Nothing -> []
- Just ps -> ps
+lookupModuleInAllPackages dflags m
+ = case lookupModuleWithSuggestions dflags m of
+ Right pbs -> pbs
+ Left _ -> []
+
+lookupModuleWithSuggestions
+ :: DynFlags -> ModuleName
+ -> Either [Module] [(PackageConfig,Bool)]
+ -- Lookup module in all packages
+ -- Right pbs => found in pbs
+ -- Left ms => not found; but here are sugestions
+lookupModuleWithSuggestions dflags m
+ = case lookupUFM (moduleToPkgConfAll pkg_state) m of
+ Nothing -> Left suggestions
+ Just ps -> Right ps
+ where
+ pkg_state = pkgState dflags
+ suggestions
+ | dopt Opt_HelpfulErrors dflags = fuzzyLookup (moduleNameString m) all_mods
+ | otherwise = []
+
+ all_mods :: [(String, Module)] -- All modules
+ all_mods = [ (moduleNameString mod_nm, mkModule pkg_id mod_nm)
+ | pkg_config <- eltsUFM (pkgIdMap pkg_state)
+ , let pkg_id = packageConfigId pkg_config
+ , mod_nm <- exposedModules pkg_config ]
-- | Find all the 'PackageConfig' in both the preload packages from 'DynFlags' and corresponding to the list of
-- 'PackageConfig's