Must merge this PR in to run the audit command correctly

lib/sport_ngin_aws_auditor/instance_helper.rb

@@ -58,7 +58,7 @@ def add_region_ris_to_hash(ris_region, differences)
     def add_additional_instances_to_hash(instances_to_add, instance_hash, extra_string)
       instances_to_add.each do |instance|
         next if instance.nil?
-        key = instance.to_s.dup << extra_string << instance.name << ")"
+        key = instance.to_s.dup << extra_string << (instance.name || "") << ")"
         instance_result = {}
 
         if instance_hash.has_key?(instance.to_s) && instance_hash[instance.to_s][:count] > 0

lib/sport_ngin_aws_auditor/scripts/audit.rb

@@ -25,16 +25,19 @@ def self.execute(environment, options=nil, global_options=nil)
           tag_name = options[:tag]
         end
 
-        ignore_instances_patterns = options[:ignore_instances_patterns].split(', ') if options[:ignore_instances_patterns]
         ignore_instances_regexes = []
-        ignore_instances_patterns.each do |r|
-          ignore_instances_regexes << Regexp.new(r)
+        if options[:ignore_instances_patterns]
+          ignore_instances_patterns = options[:ignore_instances_patterns].split(', ')
+          ignore_instances_patterns.each do |r|
+            ignore_instances_regexes << Regexp.new(r)
+          end
         end
+
         zone_output = options[:zone_output]
 
         cycle = [["EC2Instance", options[:ec2]],
-                ["RDSInstance", options[:rds]],
-                ["CacheInstance", options[:cache]]]
+                 ["RDSInstance", options[:rds]],
+                 ["CacheInstance", options[:cache]]]
 
         if !slack
           print "Gathering info, please wait..."; print "\r"