lua5: Add the lua-sockets extension.

pkgs/development/interpreters/lua-5/5.1.nix

@@ -9,6 +9,7 @@ let
 in
 stdenv.mkDerivation rec {
   name = "lua-5.1.5";
+  luaversion = "5.1";
 
   src = fetchurl {
     url = "http://www.lua.org/ftp/${name}.tar.gz";

pkgs/development/interpreters/lua-5/sockets.nix

@@ -0,0 +1,25 @@
+{stdenv, fetchurl, lua5}:
+
+stdenv.mkDerivation rec {
+  name    = "lua-sockets-${version}";
+  version = "2.0.2";
+  src = fetchurl {
+      url = "http://files.luaforge.net/releases/luasocket/luasocket/luasocket-${version}/luasocket-${version}.tar.gz";
+      sha256 = "19ichkbc4rxv00ggz8gyf29jibvc2wq9pqjik0ll326rrxswgnag";
+  };
+
+  luaver = "5.1"; # TODO
+  patchPhase = ''
+      sed -e "s,^INSTALL_TOP_SHARE.*,INSTALL_TOP_SHARE=$out/share/lua/${lua5.luaversion}," \
+          -e "s,^INSTALL_TOP_LIB.*,INSTALL_TOP_LIB=$out/lib/lua/${lua5.luaversion}," \
+          -i config
+  '';
+
+  buildInputs = [ lua5 ];
+
+  meta = {
+    homepage = "http://w3.impa.br/~diego/software/luasocket/";
+    platforms = stdenv.lib.platforms.linux;
+    maintainers = [ stdenv.lib.maintainers.mornfall ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -3126,6 +3126,8 @@ let
   };
   lua5 = lua5_1;
 
+  lua5_sockets = callPackage ../development/interpreters/lua-5/sockets.nix {};
+
   luarocks = callPackage ../development/tools/misc/luarocks {
      lua = lua5;
   };