(* Goalfile parser
 * Copyright (C) 2019 Richard W.M. Jones
 * Copyright (C) 2019 Red Hat Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *)

open Printf

let main () =
  (* Change directory (-C option). *)
  Sys.chdir Cmdline.directory;

  (* Parse the prelude. *)
  let env =
    if Cmdline.use_prelude then
      Parse.parse_goalfile Ast.Env.empty Cmdline.prelude_file
    else
      Ast.Env.empty in

  (* Parse the input file. *)
  let env = Parse.parse_goalfile env Cmdline.input_file in

  (* Parse the command line assignments. *)
  let env =
    List.fold_left (
      fun env (name, expr) ->
        let expr = Parse.parse_cli_expr expr in
        Ast.Env.add name expr env
    ) env Cmdline.anon_vars in

  (* Parse the target expressions. *)
  let targets = List.map Parse.parse_cli_expr Cmdline.targets in

  (* If no target was set on the command line, use "all ()". *)
  let targets =
    if targets <> [] then targets
    else [Ast.ECallGoal (Ast.noloc, "all", [])] in

  if Cmdline.debug_flag then
    Ast.print_env stderr env;

  (* Run the target expressions. *)
  Run.run_targets env targets

let () =
  try main ()
  with
    Failure msg | Sys_error msg ->
      prerr_endline ("error: " ^ msg); exit 1