# File lib/puma/configuration.rb, line 84 def app app = @options[:app] unless app unless File.exists?(rackup) raise "Missing rackup file '#{rackup}'" end app, options = Rack::Builder.parse_file rackup @options.merge! options options.each do |key,val| if key.to_s[0,4] == "bind" @options[:binds] << val end end end if !@options[:quiet] and @options[:environment] == "development" logger = @options[:logger] || STDOUT app = Rack::CommonLogger.new(app, logger) end return ConfigMiddleware.new(self, app) end