libselinux: Add option to enable Python support.

The reason this is optional is because we might want to use it for bootstrapping
in some constellations. And we really don't want whole lot of dependencies in
those situations.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

1 files changed, 15 insertions, 3 deletions

diff --git a/pkgs/os-specific/linux/libselinux/default.nix b/pkgs/os-specific/linux/libselinux/default.nix
index 873065d5424..01935e76632 100644
--- a/pkgs/os-specific/linux/libselinux/default.nix
+++ b/pkgs/os-specific/linux/libselinux/default.nix
@@ -1,4 +1,10 @@
-{ stdenv, fetchurl, pkgconfig, libsepol, pcre }:
+{ stdenv, fetchurl, pkgconfig, libsepol, pcre
+, enablePython ? false, swig ? null, python ? null
+}:
+
+assert enablePython -> swig != null && python != null;
+
+with stdenv.lib;
 
 stdenv.mkDerivation rec {
   name = "libselinux-${version}";
@@ -17,7 +23,8 @@ stdenv.mkDerivation rec {
 
   patches = [ ./fPIC.patch ]; # libsemanage seems to need -fPIC everywhere
 
-  buildInputs = [ pkgconfig libsepol pcre ];
+  buildInputs = [ pkgconfig libsepol pcre ]
+             ++ optionals enablePython [ swig python ];
 
   prePatch = ''
     tar xvf ${patch_src}
@@ -26,7 +33,12 @@ stdenv.mkDerivation rec {
     done
   '';
 
-  preInstall = '' makeFlags="$makeFlags PREFIX=$out DESTDIR=$out" '';
+  postPatch = optionalString enablePython ''
+    sed -i -e 's|\$(LIBDIR)/libsepol.a|${libsepol}/lib/libsepol.a|' src/Makefile
+  '';
+
+  installFlags = [ "PREFIX=$(out)" "DESTDIR=$(out)" "LIBSEPOLDIR=${libsepol}" ];
+  installTargets = [ "install" ] ++ optional enablePython "install-pywrap";
 
   meta = {
     inherit (libsepol.meta) homepage platforms maintainers;