(*  Title:      Admin/isatest/annomaly.ML

    ID:         $Id$

    Author:     Martin von Gagern <martin@von-gagern.net>

*)

use "ML-Systems/smlnj.ML";

local

  val smlnj_use_text = use_text

  fun strip ([], "src" :: name, _) = name

    | strip (["Distribution"], name, _) = name

    | strip ([], name, _) = name

    | strip (h1 :: t1, h2 :: t2, def) =

      if h1 = h2 then strip (t1, t2, def) else def

  fun rewrite (NONE, name) = "use_text" :: name

    | rewrite (SOME home, name) =

      strip (#arcs (OS.Path.fromString home), name, "use_text" :: name)

in

  fun use_text name p v t =

    let val name = case name of "" => "unnamed" | name => name

        val arcs = rewrite (OS.Process.getEnv "ISABELLE_HOME",

                            #arcs (OS.Path.fromString name))

        val _    = AnnoMaLy.nameNextStream ("isabelle" :: arcs)

    in  smlnj_use_text name p v t  end

end;