ocaml adding deriving

pkgs/development/tools/ocaml/deriving/default.nix

@@ -0,0 +1,72 @@
+{stdenv, fetchurl, zlib, ocaml, findlib, ncurses
+, versionedDerivation, unzip
+, version ?
+    let match = {
+      "ocaml-3.10.0" = "for-3.10.0";
+      "ocaml-3.12.1" = "for-3.12.1";
+    }; in stdenv.lib.maybeAttr ocaml.name (throw "no matching source of ocaml-deriving for ocaml version: ${ocaml.name}") match
+}:
+
+/*
+Usage example:
+
+== main.ml ==
+type t = | A | B
+  deriving (Show)
+
+print_string (Show.show<t> (A));;
+==
+
+ocamlopt -pp $out/bin/deriving -I $d/lib -I $d/syntax nums.cmxa show.cmx main.ml
+*/
+
+versionedDerivation "ocaml-deriving" version {
+
+  "for-3.10.0" = {
+    name = "deriving-0.1.1a";
+      # ocaml: 3.10.0
+    src = fetchurl {
+      url = https://deriving.googlecode.com/files/deriving-0.1.1a.tar.gz;
+      sha256 = "0ppmqhc23kccfjn3cnd9n205ky627ni8f5djf8sppmc3lc1m97mb";
+    };
+  };
+
+  "for-3.12.1" = {
+    name = "deriving-more-recent";
+
+    # https://github.com/jaked/deriving
+    src = fetchurl {
+      name = "for-3.12.0.zip";
+      url = https://codeload.github.com/jaked/deriving/zip/c7b9cea3eb4bbfb9e09673faf725f70247c9df78;
+      sha256 = "1zrmpqb5lsjmizqs68czmfpsbz9hz30pf97w11kkby175hhj84gi";
+    };
+
+    buildInputs = [ unzip ];
+  };
+
+}
+{
+  buildInputs = [ocaml findlib];
+
+  installPhase = ''
+    # not all tests compile !?
+    # (cd tests; make)
+
+    ensureDir $out/bin
+    cp -a lib $out/
+    cp -a syntax $out
+
+    # this allows -pp deriving
+    ln -s $out/syntax/deriving $out/bin/deriving
+  '';
+
+  meta = {
+    homepage = "https://code.google.com/p/deriving/source/checkout";
+    description = "A library of cryptographic primitives for OCaml";
+    license = stdenv.lib.licenses.mit;
+    platforms = ocaml.meta.platforms;
+    maintainers = [
+      stdenv.lib.maintainers.z77z
+    ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -2717,6 +2717,8 @@ let
 
     cryptokit = callPackage ../development/ocaml-modules/cryptokit { };
 
+    deriving = callPackage ../development/tools/ocaml/deriving { };
+
     findlib = callPackage ../development/tools/ocaml/findlib { };
 
     dypgen = callPackage ../development/ocaml-modules/dypgen { };