src/Pure/Tools/build.ML

clarified build_theories;

(*  Title:      Pure/Tools/build.ML
    Author:     Makarius

Build Isabelle sessions.
*)

signature BUILD =
sig
  val build: string -> unit
end;

structure Build: BUILD =
struct

(* command timings *)

type timings = ((string * Time.time) Inttab.table) Symtab.table;  (*file -> offset -> name, time*)

val empty_timings: timings = Symtab.empty;

fun update_timings props =
  (case Markup.parse_command_timing_properties props of
    SOME ({file, offset, name}, time) =>
      Symtab.map_default (file, Inttab.empty)
        (Inttab.map_default (offset, (name, time)) (fn (_, t) => (name, Time.+ (t, time))))
  | NONE => I);

fun approximative_id name pos =
  (case (Position.file_of pos, Position.offset_of pos) of
    (SOME file, SOME offset) =>
      if name = "" then NONE else SOME {file = file, offset = offset, name = name}
  | _ => NONE);

fun lookup_timings timings tr =
  (case approximative_id (Toplevel.name_of tr) (Toplevel.pos_of tr) of
    SOME {file, offset, name} =>
      (case Symtab.lookup timings file of
        SOME offsets =>
          (case Inttab.lookup offsets offset of
            SOME (name', time) => if name = name' then SOME time else NONE
          | NONE => NONE)
      | NONE => NONE)
  | NONE => NONE);


(* session timing *)

fun session_timing name verbose f x =
  let
    val start = Timing.start ();
    val y = f x;
    val timing = Timing.result start;

    val threads = string_of_int (Multithreading.max_threads_value ());
    val factor = Time.toReal (#cpu timing) / Time.toReal (#elapsed timing)
      |> Real.fmt (StringCvt.FIX (SOME 2));

    val timing_props =
      [("threads", threads)] @ Markup.timing_properties timing @ [("factor", factor)];
    val _ = writeln ("\fTiming = " ^ YXML.string_of_body (XML.Encode.properties timing_props));
    val _ =
      if verbose then
        Output.physical_stderr ("Timing " ^ name ^ " (" ^
          threads ^ " threads, " ^ Timing.message timing ^ ", factor " ^ factor ^ ")\n")
      else ();
  in y end;


(* protocol messages *)

fun inline_message a args =
  writeln ("\f" ^ a ^ " = " ^ YXML.string_of_body (XML.Encode.properties args));

fun protocol_message props output =
  (case props of
    function :: args =>
      if function = Markup.ML_statistics orelse function = Markup.task_statistics then
        inline_message (#2 function) args
      else if function = Markup.command_timing then
        let
          val name = the_default "" (Properties.get args Markup.nameN);
          val pos = Position.of_properties args;
          val {elapsed, ...} = Markup.parse_timing_properties args;
        in
          if Timing.is_relevant_time elapsed then
            (case approximative_id name pos of
              SOME id => inline_message (#2 function) (Markup.command_timing_properties id elapsed)
            | NONE => ())
          else ()
        end
      else
        (case Markup.dest_loading_theory props of
          SOME name => writeln ("\floading_theory = " ^ name)
        | NONE => raise Output.Protocol_Message props)
  | [] => raise Output.Protocol_Message props);


(* build *)

fun build args_file = Command_Line.tool0 (fn () =>
    let
      val _ = SHA1_Samples.test ();

      val (command_timings, (do_output, (options, (verbose, (browser_info,
          (document_files, (parent_name, (chapter, (name, theories))))))))) =
        File.read (Path.explode args_file) |> YXML.parse_body |>
          let open XML.Decode in
            pair (list properties) (pair bool (pair Options.decode (pair bool (pair string
              (pair (list (pair string string)) (pair string (pair string (pair string
                ((list (pair Options.decode (list (string #> rpair Position.none)))))))))))))
          end;

      val _ = Options.set_default options;

      val _ = writeln ("\fSession.name = " ^ name);
      val _ =
        Session.init do_output
          (Options.bool options "browser_info")
          (Path.explode browser_info)
          (Options.string options "document")
          (Options.bool options "document_graph")
          (Options.string options "document_output")
          (Present.document_variants (Options.string options "document_variants"))
          (map (apply2 Path.explode) document_files)
          parent_name (chapter, name)
          verbose;

      val last_timing = lookup_timings (fold update_timings command_timings empty_timings);

      val res1 =
        theories |>
          (List.app (Thy_Info.build_theories last_timing Path.current)
            |> session_timing name verbose
            |> Unsynchronized.setmp Output.protocol_message_fn protocol_message
            |> Multithreading.max_threads_setmp (Options.int options "threads")
            |> Exn.capture);
      val res2 = Exn.capture Session.finish ();
      val _ = Par_Exn.release_all [res1, res2];

      val _ = Options.reset_default ();
      val _ = if do_output then () else exit 0;
    in () end);

end;