[entropy.server] do not taint database (update revision) if db is read only

libraries/entropy/server/interfaces/db.py

@@ -141,4 +141,4 @@ class ServerRepositoryStatus(Singleton):
         """
         if db not in self.__updates_log:
             self.__updates_log[db] = {}
-        return self.__updates_log[db]
+        return self.__updates_log[db]

libraries/entropy/server/interfaces/main.py

@@ -131,6 +131,10 @@ class ServerEntropyRepositoryPlugin(EntropyRepositoryPlugin):
         dbs = ServerRepositoryStatus()
         dbfile = entropy_repository_instance.dbFile
         repo = entropy_repository_instance.dbname
+        read_only = entropy_repository_instance.readOnly
+        if read_only:
+            # do not taint database
+            return 0
 
         # taint the database status
         taint_file = self._server.get_local_database_taint_file(repo = repo)