lib/pdd.rb in pdd-0.17.8 vs lib/pdd.rb in pdd-0.17.9

@@ -29,11 +29,11 @@
 require_relative 'pdd/rule/text'
 require_relative 'pdd/rule/duplicates'
 require_relative 'pdd/rule/roles'
 
 # PDD main module.
-# Author:: Yegor Bugayenko ([e-mail])
+# Author:: Yegor Bugayenko ([e-mail])
 # Copyright:: Copyright (c) 2014-2017 Yegor Bugayenko
 # License:: MIT
 module PDD
   # If it breaks.
   class Error < StandardError
@@ -136,10 +136,14 @@
     end
 
     def rules(xml)
       doc = Nokogiri::XML(xml)
       total = 0
-      (@opts[:rule] || []).push('max-duplicates:1').map do |r|
+      list = @opts[:rule] || []
+      unless list.select { |r| r.start_with?('max-duplicates:') }.empty?
+        raise PDD::Error, 'You can\'t modify max-duplicates, it\'s always 1'
+      end
+      list.push('max-duplicates:1').map do |r|
         name, value = r.split(':')
         rule = RULES[name]
         raise "rule '#{name}' doesn't exist" if rule.nil?
         rule.new(doc, value).errors.each do |e|
           PDD.log.error e