- fun fname ->
- debug_print ("Loading configuration from " ^ fname);
- let document =
- parse_wfdocument_entity config (from_file fname) default_spec
- in
- let rec aux key_stack node =
- node#iter_nodes (fun n ->
- try
- (match n#node_type with
- | T_element "section" ->
- let section = n#required_string_attribute "name" in
- aux (key_stack @ [section]) n
- | T_element "key" ->
- let key = n#required_string_attribute "name" in
- let value = n#data in
- set ~key:(fold_key key_stack key) ~value
- | _ -> ())
- with exn ->
- let (fname, line, pos) = n#position in
- raise (Parse_error (fname, line, pos,
- "Uncaught exception: " ^ Printexc.to_string exn)))
- in
- let backup = backup_registry () in
- Hashtbl.clear registry;
- try
- aux [] document#root
- with exn ->
- restore_registry backup;
- raise exn
+ Hashtbl.fold
+ (fun k v tree -> add_key ("helm_registry" :: (Str.split dot_RE k)) v tree)
+ registry
+ (Element ("helm_registry", [], []))
+
+let rec stream_of_xml_tree = function
+ | Cdata s -> Xml.xml_cdata s
+ | Element (name, attrs, children) ->
+ Xml.xml_nempty name
+ (List.map (fun (n, v) -> (None, n, v)) attrs)
+ (stream_of_xml_trees children)
+and stream_of_xml_trees = function
+ | [] -> [< >]
+ | hd :: tl -> [< stream_of_xml_tree hd; stream_of_xml_trees tl >]
+
+let save_to registry fname =
+ let token_stream = stream_of_xml_tree (xml_tree_of_registry registry) in
+ let oc = open_out fname in
+ Xml.pp_to_outchan token_stream oc;
+ close_out oc
+
+let load_from_absolute registry fname =
+ let path = ref [] in (* <section> elements entered so far *)
+ let in_key = ref false in (* have we entered a <key> element? *)
+ let cdata = ref "" in (* collected cdata (inside <key> *)
+ let push_path name = path := name :: !path in
+ let pop_path () = path := List.tl !path in
+ let start_element tag attrs =
+ match tag, attrs with
+ | "section", ["name", name] -> push_path name
+ | "key", ["name", name] -> in_key := true; push_path name
+ | "helm_registry", _ -> ()
+ | tag, _ ->
+ raise (Parse_error (fname, ~-1, ~-1,
+ (sprintf "unexpected element <%s> or wrong attribute set" tag)))
+ in
+ let end_element tag =
+ match tag with
+ | "section" -> pop_path ()
+ | "key" ->
+ let key = String.concat "." (List.rev !path) in
+ set registry ~key ~value:!cdata;
+ cdata := "";
+ in_key := false;
+ pop_path ()
+ | "helm_registry" -> ()
+ | _ -> assert false
+ in
+ let character_data text =
+ if !in_key then cdata := !cdata ^ text
+ in
+ let callbacks = {
+ XmlPushParser.default_callbacks with
+ XmlPushParser.start_element = Some start_element;
+ XmlPushParser.end_element = Some end_element;
+ XmlPushParser.character_data = Some character_data;
+ } in
+ let xml_parser = XmlPushParser.create_parser callbacks in
+ let backup = backup_registry registry in
+ Hashtbl.clear registry;
+ try
+ XmlPushParser.parse xml_parser (`File fname)
+ with exn ->
+ restore_registry backup registry;
+ raise exn