Adds ocaml-erm_xmpp

OCaml based XMPP implementation

Homepage: https://github.com/ermine/xmpp

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

@@ -0,0 +1,33 @@
+{ stdenv, fetchurl, fetchzip, ocaml, findlib, erm_xml, cryptokit, camlp4 }:
+
+let
+  version = "0.2";
+  disable-tests = fetchurl {
+    url = https://raw.githubusercontent.com/ocaml/opam-repository/master/packages/erm_xmpp/erm_xmpp.0.2/files/disable_tests.patch;
+    sha256 = "09d8630nmx2x8kb8ap1zmsb93zs14cqg7ga1gmdl92jvsjxbhgc1";
+  };
+in
+
+stdenv.mkDerivation {
+  name = "ocaml-erm_xmpp-${version}";
+
+  src = fetchzip {
+    url = "https://github.com/ermine/xmpp/archive/v${version}.tar.gz";
+    sha256 = "0saw2dmrzv2aadrznvyvchnhivvcwm78x9nwf6flq5v0pqddapk2";
+  };
+
+  patches = [ disable-tests ];
+
+  buildInputs = [ ocaml findlib camlp4 ];
+  propagatedBuildInputs = [ erm_xml cryptokit ];
+
+  createFindlibDestdir = true;
+
+  meta = {
+    homepage = https://github.com/ermine/xmpp;
+    description = "OCaml based XMPP implementation";
+    platforms = ocaml.meta.platforms;
+    license = stdenv.lib.licenses.bsd3;
+    maintainers = with stdenv.lib.maintainers; [ vbgl ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -3889,6 +3889,8 @@ let
 
     erm_xml = callPackage ../development/ocaml-modules/erm_xml { };
 
+    erm_xmpp = callPackage ../development/ocaml-modules/erm_xmpp { };
+
     ezjsonm = callPackage ../development/ocaml-modules/ezjsonm {
       lwt = ocaml_lwt;
       sexplib = ocaml_sexplib;