ocaml-mode for emacs.

There seem to exist multiple (very old) versions.
I'm taking the one shipped with the ocaml compiler, which is hopefully the "most appropriate".

svn path=/nixpkgs/trunk/; revision=32688

pkgs/applications/editors/emacs-modes/ocaml/default.nix

@@ -0,0 +1,30 @@
+{ stdenv, fetchurl, emacs, ocaml }:
+
+# this package installs the emacs-mode which
+# resides in the ocaml compiler sources.
+
+let version = stdenv.lib.removePrefix "ocaml-" ocaml.name;
+in stdenv.mkDerivation {
+  name = "ocaml-mode-${version}";
+  inherit (ocaml) prefixKey src;
+
+  # a quick configure to get the Makefile generated. Since
+  # we do not build the ocaml itself, we don't really
+  # need it to support any features.
+  configureFlags = [ "-no-tk" "-no-curses" "-no-pthread" ];
+
+  buildInputs = [ emacs ];
+  dontBuild = true;
+
+  installPhase = ''
+    cd emacs;
+    ensureDir "$out/share/emacs/site-lisp" "$out/bin"
+    EMACSDIR=$out/share/emacs/site-lisp make simple-install install-ocamltags
+  '';
+
+  meta = {
+    homepage = http://caml.inria.fr;
+    description = "OCaml mode package for Emacs";
+    platforms = stdenv.lib.platforms.unix;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -6672,6 +6672,8 @@ let
 
     haskellMode = callPackage ../applications/editors/emacs-modes/haskell { };
 
+    ocamlMode = callPackage ../applications/editors/emacs-modes/ocaml { };
+
     hol_light_mode = callPackage ../applications/editors/emacs-modes/hol_light { };
 
     htmlize = callPackage ../applications/editors/emacs-modes/htmlize { };