Use emptyRegisterFlags and emptyCopyFlags for reduced fragility
[ghc-hetmet.git] / 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 = emptyCopyFlags {
30                               copyDest = NoCopyDest,
31                               copyVerbose = verbosity
32                           }
33               registerFlags = emptyRegisterFlags {
34                                   regUser = MaybeUserGlobal,
35                                   regVerbose = verbosity
36                               }
37           lbi <- getPersistBuildConfig
38           let pd = localPkgDescr lbi
39               -- XXX This is an almighty hack, shadowing the base
40               -- Setup.hs hack
41               mkLib filt = case library pd of
42                            Just lib ->
43                                let ems = filter filt $ exposedModules lib
44                                in lib {
45                                       exposedModules = ems
46                                    }
47                            Nothing ->
48                                error "Expected a library, but none found"
49               -- There's no files for GHC.Prim, so we will fail if we
50               -- try to copy them
51               pd_copy = pd { library = Just (mkLib ("GHC.Prim" /=)) }
52               pd_reg  = pd { library = Just (mkLib (const True)) }
53               -- When coying, we need to actually give a concrete
54               -- directory to copy to rather than "$topdir"
55               lbi_copy = lbi { prefix = pref }
56               -- When we run GHC we give it a $topdir that includes the
57               -- $compiler/lib/ part of libsubdir, so we only want the
58               -- $pkgid part in the package.conf file. This is a bit of
59               -- a hack, really.
60               lbi_reg = lbi { libsubdir = "$pkgid" }
61           (copyHook simpleUserHooks) pd_copy lbi_copy userHooks copyFlags
62           (regHook simpleUserHooks)  pd_reg  lbi_reg  userHooks registerFlags
63           return ()
64