X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fmain%2FFinder.lhs;h=21d7febd447e72a1fd0904ea8f702b7ec2a1094b;hb=a1d8f7e9ead3ea284abf878ed3015a84eb5d67fb;hp=1d43591acd720a0f8c899ce41eb515f58e59d3d7;hpb=8844513929ccd58854227ddb6275095a1f1742ad;p=ghc-hetmet.git

diff --git a/compiler/main/Finder.lhs b/compiler/main/Finder.lhs
index 1d43591..21d7feb 100644
--- a/compiler/main/Finder.lhs
+++ b/compiler/main/Finder.lhs
@@ -10,6 +10,7 @@ module Finder (
     findImportedModule,
     findExactModule,
     findHomeModule,
+    findExposedPackageModule,
     mkHomeModLocation,
     mkHomeModLocation2,
     mkHiOnlyModLocation,
@@ -31,18 +32,17 @@ import Packages
 import FastString
 import Util
 import PrelNames        ( gHC_PRIM )
-import DynFlags		( DynFlags(..), isOneShot, GhcMode(..) )
+import DynFlags
 import Outputable
 import FiniteMap
 import LazyUniqFM
 import Maybes		( expectJust )
 
+import Distribution.Text
 import Distribution.Package hiding (PackageId)
 import Data.IORef	( IORef, writeIORef, readIORef, modifyIORef )
-import Data.List
 import System.Directory
 import System.FilePath
-import System.IO
 import Control.Monad
 import System.Time	( ClockTime )
 
@@ -181,10 +181,10 @@ findExposedPackageModule hsc_env mod_name mb_pkg
   | null found_exposed = return (NotFound [] Nothing mod_hiddens pkg_hiddens)
         -- found in just one exposed package:
   | [(pkg_conf, _)] <- found_exposed
-        = let pkgid = mkPackageId (package pkg_conf) in      
+        = let pkgid = packageConfigId pkg_conf in
           findPackageModule_ hsc_env (mkModule pkgid mod_name) pkg_conf
   | otherwise
-        = return (FoundMultiple (map (mkPackageId.package.fst) found_exposed))
+        = return (FoundMultiple (map (packageConfigId.fst) found_exposed))
   where
 	dflags = hsc_dflags hsc_env
         found = lookupModuleInAllPackages dflags mod_name
@@ -197,10 +197,10 @@ findExposedPackageModule hsc_env mod_name mb_pkg
 
         is_exposed (pkg_conf,exposed_mod) = exposed pkg_conf && exposed_mod
 
-        mod_hiddens = [ mkPackageId (package pkg_conf)
+        mod_hiddens = [ packageConfigId pkg_conf
                       | (pkg_conf,False) <- found ]
 
-        pkg_hiddens = [ mkPackageId (package pkg_conf)
+        pkg_hiddens = [ packageConfigId pkg_conf
                       | (pkg_conf,_) <- found, not (exposed pkg_conf) ]
 
         _pkg_conf `matches` Nothing  = True
@@ -534,17 +534,20 @@ findObjectLinkable mod obj_fn obj_time = do
 
 cannotFindModule :: DynFlags -> ModuleName -> FindResult -> SDoc
 cannotFindModule = cantFindErr (sLit "Could not find module")
+                               (sLit "Ambiguous module name")
 
 cannotFindInterface  :: DynFlags -> ModuleName -> FindResult -> SDoc
 cannotFindInterface = cantFindErr (sLit "Failed to load interface for")
+                                  (sLit "Ambiguous interface for")
 
-cantFindErr :: LitString -> DynFlags -> ModuleName -> FindResult -> SDoc
-cantFindErr cannot_find _dflags mod_name (FoundMultiple pkgs)
-  = hang (ptext cannot_find <+> quotes (ppr mod_name) <> colon) 2 (
+cantFindErr :: LitString -> LitString -> DynFlags -> ModuleName -> FindResult
+            -> SDoc
+cantFindErr _ multiple_found _ mod_name (FoundMultiple pkgs)
+  = hang (ptext multiple_found <+> quotes (ppr mod_name) <> colon) 2 (
        sep [ptext (sLit "it was found in multiple packages:"),
 		hsep (map (text.packageIdString) pkgs)]
     )
-cantFindErr cannot_find dflags mod_name find_result
+cantFindErr cannot_find _ dflags mod_name find_result
   = hang (ptext cannot_find <+> quotes (ppr mod_name) <> colon)
        2 more_info
   where
@@ -597,7 +600,17 @@ cantFindErr cannot_find dflags mod_name find_result
                hang (ptext (sLit "locations searched:")) 2 $ vcat (map text files)
         
     pkg_hidden pkg =
-        ptext (sLit "it is a member of the hidden package") <+> quotes (ppr pkg)
+        ptext (sLit "It is a member of the hidden package") <+> quotes (ppr pkg)
+        <> dot $$ cabal_pkg_hidden_hint pkg
+    cabal_pkg_hidden_hint pkg
+     | dopt Opt_BuildingCabalPackage dflags
+        = case simpleParse (packageIdString pkg) of
+          Just pid ->
+              ptext (sLit "Perhaps you need to add") <+>
+              quotes (text (display (pkgName pid))) <+>
+              ptext (sLit "to the build-depends in your .cabal file.")
+          Nothing -> empty
+     | otherwise = empty
 
     mod_hidden pkg =
         ptext (sLit "it is a hidden module in the package") <+> quotes (ppr pkg)