# File lib/nanoc/extra/checking/checks/css.rb, line 9 def run require 'w3c_validators' Dir[site.config[:output_dir] + '/**/*.css'].each do |filename| results = ::W3CValidators::CSSValidator.new.validate_file(filename) results.errors.each do |e| desc = e.message.gsub(%r{\s+}, ' ').strip self.add_issue(desc, :subject => filename) end end end