js_cmj_load.ml

(* Copyright (C) Authors of BuckleScript
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * In addition to the permissions granted to you by the LGPL, you may combine
 * or link a "work that uses the Library" with a publicly distributed version
 * of this file to produce a combined library or application, then distribute
 * that combined work under the terms of your choosing, with no requirement
 * to comply with the obligations normally placed on you by section 4 of the
 * LGPL version 3 (or the corresponding section of a later version of the LGPL
 * should you choose to use a 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *)

(* strategy:
   If not installed, use the distributed [cmj] files, 
   make sure that the distributed files are platform independent
*)



let load_builin_unit unit_name : Js_cmj_format.cmj_load_info = 
#if 
BS_RELEASE_BUILD 
(* true *)
then  
  match Ext_string_array.find_sorted
          Builtin_cmj_datasets.module_names
          unit_name with
  | Some i
    -> 
    if Js_config.get_diagnose () then
      Format.fprintf Format.err_formatter ">Cmj: %s@." unit_name;
    let cmj_table : Js_cmj_format.t = 
       let values, pure =  Ext_marshal.from_string_uncheck Builtin_cmj_datasets.module_data.(i)  in   
       {values; pure; package_spec = Js_packages_info.runtime_package_specs;js_file_kind = Little_js} 
    in 
    if Js_config.get_diagnose () then
      Format.fprintf Format.err_formatter "<Cmj: %s@." unit_name;
    {package_path =  
      Filename.dirname (Filename.dirname Sys.executable_name); cmj_table}
  | None
    ->  
#end         
    Bs_exception.error (Cmj_not_found unit_name)
(* 
let load_unit_no_file unit_name : Js_cmj_format.cmj_load_info = 
  let file = unit_name ^ Literals.suffix_cmj in   
  match Config_util.find_opt file with
  | Some f
    -> 
    {package_path = 
       (** hacking relying on the convention of pkg/lib/ocaml/xx.cmj*)
       Filename.dirname (Filename.dirname (Filename.dirname f)); 
     cmj_table =  Js_cmj_format.from_file f}
  | None -> 
    Bs_exception.error (Cmj_not_found unit_name) *)

let load_unit_with_file unit_name : Js_cmj_format.cmj_load_info = 
  let file = unit_name ^ Literals.suffix_cmj in   
  match Config_util.find_opt file with
  | Some f
    -> 
    {package_path = 
      (** hacking relying on the convention of pkg/lib/ocaml/xx.cmj*)
      Filename.dirname (Filename.dirname (Filename.dirname f)); 
      cmj_table =  Js_cmj_format.from_file f}
  | None -> 
    if !Js_config.no_stdlib then Bs_exception.error (Cmj_not_found unit_name)
    else load_builin_unit unit_name 


(* we can disable loading from file for troubleshooting
   Note in dev mode we still allow loading from file is to 
   make the dev build still function correct 
*)
let load_unit = ref load_unit_with_file