src/Pure/Tools/build.scala

         export_consumer.shutdown(close = true).map(Output.error_message_text) match {
           case Nil => result0
           case errs => result0.errors(errs).error_rc
         }
 
-      if (result1.ok)
+      if (result1.ok) {
+        for (document_output <- proper_string(options.string("document_output"))) {
+          val document_output_dir = info.dir + Path.explode(document_output)
+          Isabelle_System.mkdirs(document_output_dir)
+
+          val base = deps(session_name)
+          File.write(document_output_dir + Path.explode("session.tex"),
+            base.session_theories.map(name => "\\input{" + name.theory_base_name + ".tex}\n\n").mkString)
+        }
         Present.finish(progress, store.browser_info, graph_file, info, session_name)
+      }
 
       graph_file.delete
 
       val was_timeout =
         timeout_request match {