add mongo libs

ocaml/default.nix

@@ -259,6 +259,12 @@ websocketafPackages // {
     buildInputs = o.buildInputs ++ [ dune-configurator ];
   });
 
+  mongo = callPackage ./mongo { ocamlPackages = oself; };
+  mongo-lwt = callPackage ./mongo/lwt.nix { ocamlPackages = oself; };
+  mongo-lwt-unix = callPackage ./mongo/lwt-unix.nix { ocamlPackages = oself; };
+  ppx_deriving_bson = callPackage ./mongo/ppx.nix { ocamlPackages = oself; };
+  bson = callPackage ./mongo/bson.nix { ocamlPackages = oself; };
+
   mrmime = callPackage ./mrmime { ocamlPackages = oself; };
 
   mtime = osuper.mtime.override { jsooSupport = false; };

ocaml/mongo/bson.nix

@@ -0,0 +1,14 @@
+{ ocamlPackages, lib }:
+
+with ocamlPackages;
+
+buildDunePackage {
+  pname = "bson";
+  src = builtins.fetchurl {
+    url = https://github.com/anmonteiro/ocaml-mongodb/archive/535ae1b003b9c8a3844b92a78d2123881f2d404b.tar.gz;
+    sha256 = "01243z8ibmns7lqm0mx7as7xpql3c81qyqx63ylgjzpaq85i32gk";
+  };
+  version = "0.0.1-dev";
+
+  propagatedBuildInputs = [ angstrom faraday ];
+}

ocaml/mongo/default.nix

@@ -0,0 +1,10 @@
+{ ocamlPackages, lib }:
+
+with ocamlPackages;
+
+buildDunePackage {
+  pname = "mongo";
+  inherit (bson) src version;
+
+  propagatedBuildInputs = [ bson ];
+}

ocaml/mongo/lwt-unix.nix

@@ -0,0 +1,10 @@
+{ ocamlPackages, lib }:
+
+with ocamlPackages;
+
+buildDunePackage {
+  pname = "mongo-lwt-unix";
+  inherit (bson) src version;
+
+  propagatedBuildInputs = [ mongo-lwt gluten-lwt-unix ];
+}

ocaml/mongo/lwt.nix

@@ -0,0 +1,10 @@
+{ ocamlPackages, lib }:
+
+with ocamlPackages;
+
+buildDunePackage {
+  pname = "mongo-lwt";
+  inherit (bson) src version;
+
+  propagatedBuildInputs = [ mongo lwt mirage-crypto gluten-lwt pbkdf base64 ];
+}

ocaml/mongo/ppx.nix

@@ -0,0 +1,10 @@
+{ ocamlPackages, lib }:
+
+with ocamlPackages;
+
+buildDunePackage {
+  pname = "ppx_deriving_bson";
+  inherit (bson) src version;
+
+  propagatedBuildInputs = [ ppxlib ppx_deriving bson ];
+}