Adds ocaml-uuseg

Uuseg is an OCaml library for segmenting Unicode text. It implements the
locale independent Unicode text segmentation algorithms to detect
grapheme cluster, word and sentence boundaries and the Unicode line
breaking algorithm to detect line break opportunities.

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

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

@@ -0,0 +1,47 @@
+{ stdenv, fetchurl, ocaml, findlib, opam, uucp, uutf, cmdliner }:
+
+let
+  inherit (stdenv.lib) getVersion versionAtLeast;
+
+  pname = "uuseg";
+  version = "0.8.0";
+  webpage = "http://erratique.ch/software/${pname}";
+in
+
+assert versionAtLeast (getVersion ocaml) "4.01";
+
+stdenv.mkDerivation {
+
+  name = "ocaml-${pname}-${version}";
+
+  src = fetchurl {
+    url = "${webpage}/releases/${pname}-${version}.tbz";
+    sha256 = "00n4zi8dyw2yzi4nr2agcrr33b0q4dr9mgnkczipf4c0gm5cm50h";
+  };
+
+  buildInputs = [ ocaml findlib opam cmdliner ];
+  propagatedBuildInputs = [ uucp uutf ];
+
+  createFindlibDestdir = true;
+
+  unpackCmd = "tar xjf $src";
+
+  buildPhase = ''
+    ocaml pkg/build.ml \
+      native=true native-dynlink=true \
+      uutf=true cmdliner=true
+  '';
+
+  installPhase = ''
+    opam-installer --script --prefix=$out ${pname}.install | sh
+    ln -s $out/lib/${pname} $out/lib/ocaml/${getVersion ocaml}/site-lib/${pname}
+  '';
+
+  meta = with stdenv.lib; {
+    description = "An OCaml library for segmenting Unicode text";
+    homepage = "${webpage}";
+    platforms = ocaml.meta.platforms;
+    license = licenses.bsd3;
+    maintainers = [ maintainers.vbgl ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -3820,6 +3820,7 @@ let
     uucd = callPackage ../development/ocaml-modules/uucd { };
     uucp = callPackage ../development/ocaml-modules/uucp { };
     uunf = callPackage ../development/ocaml-modules/uunf { };
+    uuseg = callPackage ../development/ocaml-modules/uuseg { };
     uutf = callPackage ../development/ocaml-modules/uutf { };
 
     vg = callPackage ../development/ocaml-modules/vg { };