libraries/installPackage.hs

   1
   2 import Distribution.PackageDescription
   3 import Distribution.Setup
   4 import Distribution.Simple
   5 import Distribution.Simple.Configure
   6 import Distribution.Simple.LocalBuildInfo
   7 import Distribution.Verbosity
   8 import System.Environment
   9
  10 main :: IO ()
  11 main = do args <- getArgs
  12           case args of
  13               pref : ghcpkg : args' ->
  14                   let verbosity = case args' of
  15                               [] -> normal
  16                               ['-':'v':v] ->
  17                                   let m = case v of
  18                                               "" -> Nothing
  19                                               _ -> Just v
  20                                   in flagToVerbosity m
  21                               _ -> error ("Bad arguments: " ++ show args)
  22                   in doit pref ghcpkg verbosity
  23               _ ->
  24                   error "Missing arguments"
  25
  26 doit :: FilePath -> FilePath -> Verbosity -> IO ()
  27 doit pref ghcpkg verbosity =
  28        do let userHooks = simpleUserHooks
  29               copyFlags = CopyFlags {
  30                               copyDest = NoCopyDest,
  31                               copyVerbose = verbosity
  32                           }
  33               registerFlags = RegisterFlags {
  34                                   regUser = MaybeUserGlobal,
  35                                   regGenScript = False,
  36                                   regInPlace = False,
  37                                   regWithHcPkg = Just ghcpkg,
  38                                   regVerbose = verbosity
  39                               }
  40           lbi <- getPersistBuildConfig
  41           let pd = localPkgDescr lbi
  42               -- XXX This is an almighty hack, shadowing the base
  43               -- Setup.hs hack
  44               mkLib filt = case library pd of
  45                            Just lib ->
  46                                let ems = filter filt $ exposedModules lib
  47                                in lib {
  48                                       exposedModules = ems
  49                                    }
  50                            Nothing ->
  51                                error "Expected a library, but none found"
  52               -- There's no files for GHC.Prim, so we will fail if we
  53               -- try to copy them
  54               pd_copy = pd { library = Just (mkLib ("GHC.Prim" /=)) }
  55               pd_reg  = pd { library = Just (mkLib (const True)) }
  56               -- When coying, we need to actually give a concrete
  57               -- directory to copy to rather than "$topdir"
  58               lbi_copy = lbi { prefix = pref }
  59               -- When we run GHC we give it a $topdir that includes the
  60               -- $compiler/lib/ part of libsubdir, so we only want the
  61               -- $pkgid part in the package.conf file. This is a bit of
  62               -- a hack, really.
  63               lbi_reg = lbi { libsubdir = "$pkgid" }
  64           (copyHook simpleUserHooks) pd_copy lbi_copy userHooks copyFlags
  65           (regHook simpleUserHooks)  pd_reg  lbi_reg  userHooks registerFlags
  66           return ()
  67