Adds ocaml-jsonm

Jsonm is an OCaml non-blocking streaming codec to decode and encode the
JSON data format.

Homepage: http://erratique.ch/software/jsonm

pkgs/development/ocaml-modules/jsonm/default.nix

@@ -0,0 +1,30 @@
+{ stdenv, fetchurl, ocaml, findlib, uutf }:
+
+let version = "0.9.1"; in
+
+stdenv.mkDerivation {
+  name = "ocaml-jsonm-${version}";
+
+  src = fetchurl {
+    url = "http://erratique.ch/software/jsonm/releases/jsonm-${version}.tbz";
+    sha256 = "0wszqrmx8iqlwzvs76fjf4sqh15mv20yjrbyhkd348yq8nhdrm1z";
+  };
+
+  buildInputs = [ ocaml findlib ];
+  propagatedBuildInputs = [ uutf ];
+
+  unpackCmd = "tar xjf $src";
+
+  configurePhase = "ocaml setup.ml -configure --prefix $prefix";
+  buildPhase = "ocaml setup.ml -build";
+  createFindlibDestdir = true;
+  installPhase = "ocaml setup.ml -install";
+
+  meta = {
+    description = "An OCaml non-blocking streaming codec to decode and encode the JSON data format";
+    homepage = http://erratique.ch/software/jsonm;
+    licenses = stdenv.lib.licenses.bsd3;
+    maintainers = with stdenv.lib.maintainers; [ vbgl ];
+    platforms = ocaml.meta.platforms;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -3774,6 +3774,8 @@ let
 
     js_of_ocaml = callPackage ../development/tools/ocaml/js_of_ocaml { };
 
+    jsonm = callPackage ../development/ocaml-modules/jsonm { };
+
     lablgl = callPackage ../development/ocaml-modules/lablgl { };
 
     lablgtk_2_14 = callPackage ../development/ocaml-modules/lablgtk/2.14.0.nix {