--- /dev/null
+(* Copyright (C) 2004-2005, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM 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.
+ *
+ * HELM 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 HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://helm.cs.unibo.it/
+ *)
+
+exception UnableToInclude of string
+
+let baseuri_of_baseuri_decl st =
+ match st with
+ | GrafiteAst.Executable (_, GrafiteAst.Command (_, GrafiteAst.Set (_, "baseuri", buri))) ->
+ Some buri
+ | _ -> None
+
+let make_absolute paths path =
+ let rec aux = function
+ | [] -> ignore (Unix.stat path); path
+ | p :: tl ->
+ let path = p ^ "/" ^ path in
+ try
+ ignore (Unix.stat path); path
+ with Unix.Unix_error _ -> aux tl
+ in
+ try
+ aux paths
+ with Unix.Unix_error _ -> raise (UnableToInclude path)
+;;
+
+let baseuri_of_script ~include_paths file =
+ let file = make_absolute include_paths file in
+ let uri = ref None in
+ let ic = open_in file in
+ let istream = Ulexing.from_utf8_channel ic in
+ (try
+ while true do
+ try
+ let stm = GrafiteParser.parse_statement istream in
+ match baseuri_of_baseuri_decl stm with
+ | Some buri ->
+ let u = Http_getter_misc.strip_trailing_slash buri in
+ if String.length u < 5 || String.sub u 0 5 <> "cic:/" then
+ HLog.error (file ^ " sets an incorrect baseuri: " ^ buri);
+ (try
+ ignore(Http_getter.resolve u)
+ with
+ | Http_getter_types.Unresolvable_URI _ ->
+ HLog.error (file ^ " sets an unresolvable baseuri: "^buri)
+ | Http_getter_types.Key_not_found _ -> ());
+ uri := Some u;
+ raise End_of_file
+ | None -> ()
+ with
+ CicNotationParser.Parse_error err ->
+ HLog.error ("Unable to parse: " ^ file);
+ HLog.error ("Parse error: " ^ err);
+ ()
+ done
+ with End_of_file -> close_in ic);
+ match !uri with
+ | Some uri -> uri
+ | None -> failwith ("No baseuri defined in " ^ file)