add the ocaml 'lambda-term' library (terminal control)

pkgs/development/ocaml-modules/lambda-term/default.nix

@@ -0,0 +1,41 @@
+{stdenv, fetchurl, libev, ocaml, findlib, ocaml_lwt, ocaml_react, zed}:
+
+stdenv.mkDerivation rec {
+  version = "1.6";
+  name = "lambda-term-${version}";
+
+  src = fetchurl {
+    url = https://github.com/diml/lambda-term/archive/1.6.tar.gz;
+    sha256 = "1rhfixdgpylxznf6sa9wr31wb4pjzpfn5mxhxqpbchmpl2afwa09";
+  };
+
+  buildInputs = [ libev ocaml findlib ocaml_lwt ocaml_react ];
+
+  propagatedBuildInputs = [ zed ];
+
+  createFindlibDestdir = true;
+
+  meta = { description = "Terminal manipulation library for OCaml";
+    longDescription = ''
+    Lambda-term is a cross-platform library for
+    manipulating the terminal. It provides an abstraction for keys,
+    mouse events, colors, as well as a set of widgets to write
+    curses-like applications.
+
+    The main objective of lambda-term is to provide a higher level
+    functional interface to terminal manipulation than, for example,
+    ncurses, by providing a native OCaml interface instead of bindings to
+    a C library.
+
+    Lambda-term integrates with zed to provide text edition facilities in
+    console applications.
+    '';
+
+    homepage = https://github.com/diml/lambda-term;
+    license = stdenv.lib.licenses.bsd3;
+    platforms = ocaml.meta.platforms;
+    maintainers = [
+      stdenv.lib.maintainers.gal_bolle
+    ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -3289,6 +3289,8 @@ let
       gtkmathview = callPackage ../development/libraries/gtkmathview { };
     };
 
+    lambdaTerm = callPackage ../development/ocaml-modules/lambda-term { };
+
     menhir = callPackage ../development/ocaml-modules/menhir { };
 
     merlin = callPackage ../development/tools/ocaml/merlin { };