lib/secretfile.rb in secretfile-1.0.1 vs lib/secretfile.rb in secretfile-1.0.2

@@ -11,22 +11,27 @@
       instance.get k
     end
 
     def group
       begin
-        instance.group ||= {}
+        instance.mutex.synchronize do
+          raise "Can't nest Secretfile.group" if instance.group
+          instance.group = {}
+        end
         yield
       ensure
         instance.group = nil
       end
     end
   end
 
   attr_reader :spec
+  attr_reader :mutex
   attr_accessor :group
 
   def initialize
     super # singleton magic i guess
+    @mutex = Mutex.new
     read_spec
   end
 
   def get(k)
     k = k&.to_s