Merge pull request #6412 from olavks/lua-cjson

Add lua package for json module written in C

pkgs/top-level/lua-packages.nix

@@ -295,6 +295,27 @@ let
     };
   };
 
+  cjson = buildLuaPackage rec {
+    name = "cjson-${version}";
+    version = "2.1.0";
+    src = fetchurl {
+      url = "http://www.kyne.com.au/~mark/software/download/lua-cjson-2.1.0.tar.gz";
+      sha256 = "0y67yqlsivbhshg8ma535llz90r4zag9xqza5jx0q7lkap6nkg2i";
+    };
+    preBuild = ''
+      sed -i "s|/usr/local|$out|" Makefile
+    '';
+    makeFlags = [ "LUA_VERSION=${lua.luaversion}" ];
+    postInstall = ''
+      rm -rf $out/share/lua/${lua.luaversion}/cjson/tests
+    '';
+    installTargets = "install install-extra";
+    meta = {
+      description = "Lua C extension module for JSON support";
+      license = stdenv.lib.licenses.mit;
+    };
+  };
+
   luaMessagePack = buildLuaPackage rec {
     name = "lua-MessagePack-${version}";
     version = "0.3.1";