···

       
1
       
1
       
-
       
{ stdenv, ghc, packages, buildEnv, makeWrapper, ignoreCollisions ? false }:

     

       
2
       
2
       
-
       


     

       
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3
       
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# This wrapper works only with GHC 6.12 or later.

     

       
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assert stdenv.lib.versionOlder "6.12" ghc.version;

     

       
5
       
5
       
-
       


     

       
6
       
6
       
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# It's probably a good idea to include the library "ghc-paths" in the

     

       
7
       
7
       
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# compiler environment, because we have a specially patched version of

     

       
8
       
8
       
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# that package in Nix that honors these environment variables

     

       
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9
       
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#

     

       
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#   NIX_GHC

     

       
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11
       
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#   NIX_GHCPKG

     

       
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12
       
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#   NIX_GHC_DOCDIR

     

       
13
       
13
       
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#   NIX_GHC_LIBDIR

     

       
14
       
14
       
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#

     

       
15
       
15
       
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# instead of hard-coding the paths. The wrapper sets these variables

     

       
16
       
16
       
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# appropriately to configure ghc-paths to point back to the wrapper

     

       
17
       
17
       
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# instead of to the pristine GHC package, which doesn't know any of the

     

       
18
       
18
       
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# additional libraries.

     

       
19
       
19
       
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#

     

       
20
       
20
       
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# A good way to import the environment set by the wrapper below into

     

       
21
       
21
       
-
       
# your shell is to add the following snippet to your ~/.bashrc:

     

       
22
       
22
       
-
       
#

     

       
23
       
23
       
-
       
#   if [ -e ~/.nix-profile/bin/ghc ]; then

     

       
24
       
24
       
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#     eval $(grep export ~/.nix-profile/bin/ghc)

     

       
25
       
25
       
-
       
#   fi

     

       
26
       
26
       
-
       


     

       
27
       
27
       
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let

     

       
28
       
28
       
-
       
  ghc761OrLater = stdenv.lib.versionOlder "7.6.1" ghc.version;

     

       
29
       
29
       
-
       
  packageDBFlag = if ghc761OrLater then "--global-package-db" else "--global-conf";

     

       
30
       
30
       
-
       
  libDir        = "$out/lib/ghc-${ghc.version}";

     

       
31
       
31
       
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  docDir        = "$out/share/doc/ghc/html";

     

       
32
       
32
       
-
       
  packageCfgDir = "${libDir}/package.conf.d";

     

       
33
       
33
       
-
       
  isHaskellPkg  = x: (x ? pname) && (x ? version);

     

       
34
       
34
       
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in

     

       
35
       
35
       
-
       
if packages == [] then ghc else

     

       
36
       
36
       
-
       
buildEnv {

     

       
37
       
37
       
-
       
  name = "haskell-env-${ghc.name}";

     

       
38
       
38
       
-
       
  paths = stdenv.lib.filter isHaskellPkg (stdenv.lib.closePropagation packages) ++ [ghc];

     

       
39
       
39
       
-
       
  inherit ignoreCollisions;

     

       
40
       
40
       
-
       
  postBuild = ''

     

       
41
       
41
       
-
       
    . ${makeWrapper}/nix-support/setup-hook

     

       
42
       
42
       
-
       


     

       
43
       
43
       
-
       
    for prg in ghc ghci ghc-${ghc.version} ghci-${ghc.version}; do

     

       
44
       
44
       
-
       
      rm -f $out/bin/$prg

     

       
45
       
45
       
-
       
      makeWrapper ${ghc}/bin/$prg $out/bin/$prg         \

     

       
46
       
46
       
-
       
        --add-flags '"-B$NIX_GHC_LIBDIR"'               \

     

       
47
       
47
       
-
       
        --set "NIX_GHC"        "$out/bin/ghc"           \

     

       
48
       
48
       
-
       
        --set "NIX_GHCPKG"     "$out/bin/ghc-pkg"       \

     

       
49
       
49
       
-
       
        --set "NIX_GHC_DOCDIR" "${docDir}"              \

     

       
50
       
50
       
-
       
        --set "NIX_GHC_LIBDIR" "${libDir}"

     

       
51
       
51
       
-
       
    done

     

       
52
       
52
       
-
       


     

       
53
       
53
       
-
       
    for prg in runghc runhaskell; do

     

       
54
       
54
       
-
       
      rm -f $out/bin/$prg

     

       
55
       
55
       
-
       
      makeWrapper ${ghc}/bin/$prg $out/bin/$prg         \

     

       
56
       
56
       
-
       
        --add-flags "-f $out/bin/ghc"                   \

     

       
57
       
57
       
-
       
        --set "NIX_GHC"        "$out/bin/ghc"           \

     

       
58
       
58
       
-
       
        --set "NIX_GHCPKG"     "$out/bin/ghc-pkg"       \

     

       
59
       
59
       
-
       
        --set "NIX_GHC_DOCDIR" "${docDir}"              \

     

       
60
       
60
       
-
       
        --set "NIX_GHC_LIBDIR" "${libDir}"

     

       
61
       
61
       
-
       
    done

     

       
62
       
62
       
-
       


     

       
63
       
63
       
-
       
    for prg in ghc-pkg ghc-pkg-${ghc.version}; do

     

       
64
       
64
       
-
       
      rm -f $out/bin/$prg

     

       
65
       
65
       
-
       
      makeWrapper ${ghc}/bin/$prg $out/bin/$prg --add-flags "${packageDBFlag}=${packageCfgDir}"

     

       
66
       
66
       
-
       
    done

     

       
67
       
67
       
-
       


     

       
68
       
68
       
-
       
    $out/bin/ghc-pkg recache

     

       
69
       
69
       
-
       
  '';

     

       
70
       
70
       
-
       
}

     

···

       
70
       
70
       
 
       
            getCrossDrv = drv: drv.crossDrv or drv;

     

       
71
       
71
       
 
       
            nativeBuildInputsDrvs = map getNativeDrv nativeBuildInputs;

     

       
72
       
72
       
 
       
            buildInputsDrvs = map getCrossDrv buildInputs;

     

       
73
       
73
       
-
       
            buildInputsDrvsAsBuildInputs = map getNativeDrv buildInputs;

     

       
74
       
73
       
 
       
            propagatedBuildInputsDrvs = map getCrossDrv propagatedBuildInputs;

     

       
75
       
74
       
 
       
            propagatedNativeBuildInputsDrvs = map getNativeDrv propagatedNativeBuildInputs;

     

       
76
       
75
       
 
       


     
···

       
239
       
238
       
 
       
        NIX_CFLAGS_LINK = toString (args.NIX_CFLAGS_LINK or "") + " -fuse-ld=gold";

     

       
240
       
239
       
 
       
      });

     

       
241
       
240
       
 
       
    };

     

       
242
       
242
       
-
       


     

       
243
       
243
       
-
       
  dropCxx = drv: drv.override {

     

       
244
       
244
       
-
       
    stdenv = if pkgs.stdenv.isDarwin

     

       
245
       
245
       
-
       
      then pkgs.allStdenvs.stdenvDarwinNaked

     

       
246
       
246
       
-
       
      else pkgs.stdenv;

     

       
247
       
247
       
-
       
  };

     

       
248
       
248
       
-
       


     

       
249
       
241
       
 
       
}