diff --git a/jscomp/bin/ocaml_pack.ml b/jscomp/bin/ocaml_pack.ml
index 35bca9a0bce..283136722e8 100644
--- a/jscomp/bin/ocaml_pack.ml
+++ b/jscomp/bin/ocaml_pack.ml
@@ -1,4 +1,4 @@
-(** Bundled by ocaml_pack 06/17-13:23 *)
+(** Bundled by ocaml_pack 06/17-14:07 *)
 module Ext_bytes : sig 
 #1 "ext_bytes.mli"
 (* Copyright (C) 2015-2016 Bloomberg Finance L.P.
diff --git a/jscomp/ext/hash_set.mli b/jscomp/ext/hash_set.mli
index d867503b3f2..56d1e586075 100644
--- a/jscomp/ext/hash_set.mli
+++ b/jscomp/ext/hash_set.mli
@@ -48,3 +48,5 @@ val mem : 'a hashset -> 'a -> bool
 val iter : ('a -> unit) -> 'a hashset -> unit
 
 val elements : 'a hashset -> 'a list
+
+val length : 'a hashset -> int 
diff --git a/jscomp/js_main.ml b/jscomp/js_main.ml
index a1679f4f450..9c78905bf7e 100644
--- a/jscomp/js_main.ml
+++ b/jscomp/js_main.ml
@@ -46,6 +46,7 @@ let process_implementation_file ppf name =
   let opref = output_prefix name in
   Js_implementation.implementation ppf name opref
 
+
 let process_file ppf name =
   if Filename.check_suffix name ".ml"
   || Filename.check_suffix name ".mlt" then begin
@@ -71,6 +72,22 @@ let impl filename =
 let intf filename =
   readenv ppf Before_compile; process_interface_file ppf filename;;
 
+let batch_files : Ast_extract.info Hash_set.hashset = Hash_set.create 31
+
+let collect_file name =
+  if Filename.check_suffix name ".ml" 
+  || Filename.check_suffix name ".mlt" then 
+    Hash_set.add batch_files 
+      { source_file = name ; 
+        ast = Ml (Pparse.parse_implementation ~tool_name:"bsc" ppf name) }
+  else if Filename.check_suffix name !Config.interface_suffix then 
+    begin
+      Hash_set.add batch_files 
+        { source_file = name ; 
+          ast = Mli (Pparse.parse_interface ~tool_name:"bsc" ppf name) }
+    end
+
+
 let show_config () =
   Config.print_config stdout;
   exit 0;
@@ -310,10 +327,6 @@ let add_include_path s =
     Ext_pervasives.failwithf ~loc:__LOC__ "%s is not a directory" s 
 
 
-let batch_files = ref []
-
-let collect_file file =
-  batch_files := file :: !batch_files 
 
 let buckle_script_flags = 
   ("-bs-npm-output-path", Arg.String Js_config.set_npm_package_path, 
@@ -441,7 +454,9 @@ let main () =
   try
     readenv ppf Before_args;
     Arg.parse buckle_script_flags anonymous usage;
-    List.iter (prerr_endline ) !batch_files;
+    ( if Hash_set.length batch_files > 0 then 
+        let stck = Ast_extract.prepare batch_files in 
+        Stack.iter (prerr_endline ) stck);
     exit 0
   with x ->
     Location.report_exception ppf x;
diff --git a/jscomp/syntax/ast_extract.ml b/jscomp/syntax/ast_extract.ml
new file mode 100644
index 00000000000..03a12c4abb5
--- /dev/null
+++ b/jscomp/syntax/ast_extract.ml
@@ -0,0 +1,130 @@
+(* Copyright (C) 2015-2016 Bloomberg Finance L.P.
+ * 
+ * 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. *)
+
+
+module C = Stack
+
+
+let read_parse_and_extract ast extract_function =
+  Depend.free_structure_names := Depend.StringSet.empty;
+  (let bound_vars = Depend.StringSet.empty in
+  List.iter
+    (fun modname  ->
+      Depend.open_module bound_vars (Longident.Lident modname))
+    (!Clflags.open_modules);
+  extract_function bound_vars ast;
+  !Depend.free_structure_names)
+
+
+
+
+type ast = 
+  | Ml of Parsetree.structure
+  | Mli of Parsetree.signature
+
+type  info = 
+  { source_file : string ; 
+    ast : ast
+  }
+
+let file_dependencies (files : (info * Depend.StringSet.t) list ref)
+    ({source_file; ast} as v) =
+  let extracted_deps =
+    read_parse_and_extract ast 
+     (  match ast with
+     | Ml ast -> fun set _ ->  Depend.add_implementation set ast 
+     | Mli ast -> fun set _ ->   Depend.add_signature set ast ) in
+  files := (v, extracted_deps) :: !files
+
+
+let normalize file  =
+  let modname = String.capitalize 
+      (Filename.chop_extension @@ Filename.basename file) in
+  modname
+
+let merge (files : (info * Depend.StringSet.t) list ) : 
+  (string, Depend.StringSet.t) Hashtbl.t  
+  =
+  let tbl = Hashtbl.create 31 in 
+
+  let domain = 
+    Depend.StringSet.of_list 
+      (List.map (fun ({ source_file },_)-> normalize source_file) files) in
+  List.iter 
+    (fun  ({source_file = file; _}, deps) ->
+       let modname = String.capitalize 
+           (Filename.chop_extension @@ Filename.basename file) in
+       match Hashtbl.find tbl modname with 
+       | new_deps -> 
+         Hashtbl.replace tbl modname 
+           (Depend.StringSet.inter domain 
+              (Depend.StringSet.union deps new_deps))
+       | exception Not_found -> 
+         Hashtbl.add tbl  modname (Depend.StringSet.inter deps domain)
+    ) files  ;
+  tbl
+
+
+let sort_files_by_dependencies files
+    =
+  let h = merge files in
+  let worklist = Stack.create () in
+  let ()= 
+    Hashtbl.iter (fun key _     -> Stack.push key worklist ) h in
+  let result = C.create () in
+  let visited = Hashtbl.create 31 in
+
+  while not @@ Stack.is_empty worklist do 
+    let current = Stack.top worklist  in 
+    if Hashtbl.mem visited current then
+      ignore @@ Stack.pop worklist 
+    else 
+      match Depend.StringSet.elements (Hashtbl.find h current) with 
+      | depends -> 
+          let really_depends = 
+            List.filter 
+              (fun x ->  (Hashtbl.mem h x && (not (Hashtbl.mem visited x ))))
+              depends in
+          begin match really_depends with 
+          |[] -> 
+            begin
+              let v = Stack.pop worklist in
+              Hashtbl.add visited  v () ;
+              C.push current result 
+            end
+          | _ -> 
+              List.iter  (fun x -> Stack.push x worklist) really_depends
+          end
+      | exception Not_found ->  assert false 
+  done;
+  result
+;;
+
+
+
+let prepare ast_table = 
+  let files = ref [] in
+  Hash_set.iter (file_dependencies files) ast_table;
+  sort_files_by_dependencies (!files)
+
diff --git a/jscomp/syntax/ast_extract.mli b/jscomp/syntax/ast_extract.mli
new file mode 100644
index 00000000000..78fc3991c3a
--- /dev/null
+++ b/jscomp/syntax/ast_extract.mli
@@ -0,0 +1,39 @@
+(* Copyright (C) 2015-2016 Bloomberg Finance L.P.
+ * 
+ * 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. *)
+
+
+type ast = 
+  | Ml of Parsetree.structure
+  | Mli of Parsetree.signature
+
+type  info = 
+  { source_file : string ; 
+    ast : ast
+  }
+
+
+
+
+
+val prepare : info Hash_set.hashset -> string Stack.t
diff --git a/jscomp/syntax/syntax.mllib b/jscomp/syntax/syntax.mllib
index 5d498273bd4..f43b0912efc 100644
--- a/jscomp/syntax/syntax.mllib
+++ b/jscomp/syntax/syntax.mllib
@@ -3,4 +3,5 @@ ast_payload
 ppx_entry
 ast_literal
 ast_comb
-depend
\ No newline at end of file
+depend
+ast_extract
\ No newline at end of file