+module OrderedStrings =
+ struct
+ type t = string
+ let compare (s1 : t) (s2 : t) = compare s1 s2
+ end
+;;
+
+module MapOfStrings = Map.Make(OrderedStrings);;
+
+let read_index url =
+ let module C = Configuration in
+ if Sys.command ("helm_wget " ^ C.tmpdir ^ " " ^ url ^ "/\"" ^
+ C.indexname ^ "\"") <> 0
+ then
+ raise (ErrorGetting url) ;
+ let tmpfilename = C.tmpdir ^ "/" ^ C.indexname in
+ let fd = open_in tmpfilename in
+ let uris = ref [] in
+ try
+ while true do
+ let (uri,comp) =
+ match (Str.split (Str.regexp "[ \t]+") (input_line fd)) with
+ [uri] -> (uri,"")
+ | [uri;comp] -> (uri,".gz")
+ in
+ uris := (uri,comp) :: !uris
+ done ;
+ [] (* only to make the compiler happy *)
+ with
+ End_of_file ->
+ Sys.remove tmpfilename ;
+ !uris
+;;
+
+(* mk_urls_of_uris list_of_servers_base_urls *)
+let rec mk_urls_of_uris =
+ function
+ [] -> MapOfStrings.empty
+ | he::tl ->
+ let map = mk_urls_of_uris tl in
+ let uris = read_index he in
+ let url_of_uri (uri,comp) =
+ let url = uri ^ ".xml" ^ comp in
+ let url' = Str.replace_first (Str.regexp "cic:") he url in
+ let url'' = Str.replace_first (Str.regexp "theory:") he url' in
+ url''
+ in
+ List.fold_right
+ (fun (uri,comp) m -> MapOfStrings.add uri (url_of_uri (uri,comp)) m)
+ uris map
+;;
+
+exception PerlGetterNotResponding;;