role_show.rb in chef-0.9.0

- old
+ new

@@ -30,10 +30,18 @@
         :short => "-a ATTR",
         :long => "--attribute ATTR",
         :description => "Show only one attribute"
 
       def run 
-        role = Chef::Role.load(@name_args[0])
+        @role_name = @name_args[0]
+
+        if @role_name.nil?
+          show_usage
+          Chef::Log.fatal("You must specify a role name")
+          exit 1
+        end
+        
+        role = Chef::Role.load(@role_name)
         output(format_for_display(role))
       end
 
     end
   end