X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Fmain%2FPackageConfig.hs;h=50c1e7105aeea53f25f0044271e49a375fc13b57;hp=e19a10dbc53fbee3e6395749e34e036a958a9811;hb=7b5b3b0cab463e108a0132435a28ef19d17cb32b;hpb=0065d5ab628975892cea1ec7303f968c3338cbe1

diff --git a/compiler/main/PackageConfig.hs b/compiler/main/PackageConfig.hs
index e19a10d..50c1e71 100644
--- a/compiler/main/PackageConfig.hs
+++ b/compiler/main/PackageConfig.hs
@@ -2,68 +2,81 @@
 -- (c) The University of Glasgow, 2004
 --
 
+-- | Package configuration information: essentially the interface to Cabal, with some utilities
 module PackageConfig (
+    -- $package_naming
+    
 	-- * PackageId
-	PackageId, 
-	mkPackageId, stringToPackageId, packageIdString, packageConfigId,
-	packageIdFS, fsToPackageId, 
+	mkPackageId, packageConfigId,
 	
 	-- * The PackageConfig type: information about a package
 	PackageConfig,
-	InstalledPackageInfo(..), showPackageId,
+	InstalledPackageInfo_(..), display,
 	Version(..),
 	PackageIdentifier(..),
-	defaultPackageConfig
+	defaultPackageConfig,
+        packageConfigToInstalledPackageInfo,
+        installedPackageInfoToPackageConfig,
   ) where
 
 #include "HsVersions.h"
 
+import Maybes
+import Module
 import Distribution.InstalledPackageInfo
-import Distribution.Package
+import Distribution.ModuleName
+import Distribution.Package hiding (PackageId)
+import Distribution.Text
 import Distribution.Version
-import FastString
 
 -- -----------------------------------------------------------------------------
 -- Our PackageConfig type is just InstalledPackageInfo from Cabal.  Later we
 -- might need to extend it with some GHC-specific stuff, but for now it's fine.
 
-type PackageConfig = InstalledPackageInfo
+type PackageConfig = InstalledPackageInfo_ Module.ModuleName
+defaultPackageConfig :: PackageConfig
 defaultPackageConfig = emptyInstalledPackageInfo
 
 -- -----------------------------------------------------------------------------
 -- PackageId (package names with versions)
 
--- Mostly the compiler deals in terms of PackageNames, which don't
+-- $package_naming
+-- #package_naming#
+-- Mostly the compiler deals in terms of 'PackageName's, which don't
 -- have the version suffix.  This is so that we don't need to know the
--- version for the -package-name flag, or know the versions of
--- wired-in packages like base & rts.  Versions are confined to the
+-- version for the @-package-name@ flag, or know the versions of
+-- wired-in packages like @base@ & @rts@.  Versions are confined to the
 -- package sub-system.
 --
 -- This means that in theory you could have multiple base packages installed
--- (for example), and switch between them using -package/-hide-package.
+-- (for example), and switch between them using @-package@\/@-hide-package@.
 --
--- A PackageId is a string of the form <pkg>-<version>.
-
-newtype PackageId = PId FastString deriving( Eq, Ord )  -- includes the version
-	-- easier not to use a newtype here, because we need instances of
-	-- Binary & Outputable, and we're too early to define them
-
-fsToPackageId :: FastString -> PackageId
-fsToPackageId = PId
-
-packageIdFS :: PackageId -> FastString
-packageIdFS (PId fs) = fs
-
-stringToPackageId :: String -> PackageId
-stringToPackageId = fsToPackageId . mkFastString
-
-packageIdString :: PackageId -> String
-packageIdString = unpackFS . packageIdFS
+-- A 'PackageId' is a string of the form @<pkg>-<version>@.
 
+-- | Turn a Cabal 'PackageIdentifier' into a GHC 'PackageId'
 mkPackageId :: PackageIdentifier -> PackageId
-mkPackageId = stringToPackageId . showPackageId
+mkPackageId = stringToPackageId . display
 
+-- | Get the GHC 'PackageId' right out of a Cabalish 'PackageConfig'
 packageConfigId :: PackageConfig -> PackageId
-packageConfigId = mkPackageId . package
-
-
+packageConfigId = mkPackageId . sourcePackageId
+
+-- | Turn a 'PackageConfig', which contains GHC 'Module.ModuleName's into a Cabal specific
+-- 'InstalledPackageInfo' which contains Cabal 'Distribution.ModuleName.ModuleName's
+packageConfigToInstalledPackageInfo :: PackageConfig -> InstalledPackageInfo
+packageConfigToInstalledPackageInfo
+    (pkgconf@(InstalledPackageInfo { exposedModules = e,
+                                     hiddenModules = h })) =
+        pkgconf{ exposedModules = map convert e,
+                 hiddenModules  = map convert h }
+    where convert :: Module.ModuleName -> Distribution.ModuleName.ModuleName
+          convert = (expectJust "packageConfigToInstalledPackageInfo") . simpleParse . moduleNameString
+
+-- | Turn an 'InstalledPackageInfo', which contains Cabal 'Distribution.ModuleName.ModuleName's
+-- into a GHC specific 'PackageConfig' which contains GHC 'Module.ModuleName's
+installedPackageInfoToPackageConfig :: InstalledPackageInfo_ String -> PackageConfig
+installedPackageInfoToPackageConfig
+    (pkgconf@(InstalledPackageInfo { exposedModules = e,
+                                     hiddenModules = h })) =
+        pkgconf{ exposedModules = map mkModuleName e,
+                 hiddenModules  = map mkModuleName h }