test branch

[helm.git] / helm / ocaml / grafite_parser / dependenciesParser.ml

diff --git a/helm/ocaml/grafite_parser/dependenciesParser.ml b/helm/ocaml/grafite_parser/dependenciesParser.ml
new file mode 100644 (file)
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+++ b/helm/ocaml/grafite_parser/dependenciesParser.ml
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+(* Copyright (C) 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/
+ *)
+
+(* $Id$ *)
+
+exception UnableToInclude of string
+
+  (* statements meaningful for matitadep *)
+type dependency =
+  | IncludeDep of string
+  | BaseuriDep of string
+  | UriDep of UriManager.uri
+  
+let pp_dependency = function
+  | IncludeDep str -> "include \"" ^ str ^ "\""
+  | BaseuriDep str -> "set \"baseuri\" \"" ^ str ^ "\""
+  | UriDep uri -> "uri \"" ^ UriManager.string_of_uri uri ^ "\""
+
+let parse_dependencies lexbuf = 
+  let tok_stream,_ =
+    CicNotationLexer.level2_ast_lexer.Token.tok_func (Obj.magic lexbuf)
+  in
+  let rec parse acc = 
+    (parser
+    | [< '("URI", u) >] ->
+        parse (UriDep (UriManager.uri_of_string u) :: acc)
+    | [< '("IDENT", "include"); '("QSTRING", fname) >] ->
+        parse (IncludeDep fname :: acc)
+    | [< '("IDENT", "set"); '("QSTRING", "baseuri"); '("QSTRING", baseuri) >] ->
+        parse (BaseuriDep baseuri :: acc)
+    | [< '("EOI", _) >] -> acc
+    | [< 'tok >] -> parse acc
+    | [<  >] -> acc) tok_stream
+  in
+  List.rev (parse [])
+
+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 ic = open_in file in
+ let istream = Ulexing.from_utf8_channel ic in
+ let rec find_baseuri =
+  function
+     [] -> failwith ("No baseuri defined in " ^ file)
+   | BaseuriDep s::_ -> s
+   | _::tl -> find_baseuri tl in
+ let buri = find_baseuri (parse_dependencies istream) in
+ let uri = Http_getter_misc.strip_trailing_slash buri in
+ if String.length uri < 5 || String.sub uri 0 5 <> "cic:/" then
+   HLog.error (file ^ " sets an incorrect baseuri: " ^ buri);
+ (try 
+   ignore(Http_getter.resolve uri)
+ with
+ | Http_getter_types.Unresolvable_URI _ -> 
+     HLog.error (file ^ " sets an unresolvable baseuri: " ^ buri)
+ | Http_getter_types.Key_not_found _ -> ());
+ uri