# File lib/rack/server.rb, line 156 156: def app 157: @app ||= begin 158: if !::File.exist? options[:config] 159: abort "configuration #{options[:config]} not found" 160: end 161: 162: app, options = Rack::Builder.parse_file(self.options[:config], opt_parser) 163: self.options.merge! options 164: app 165: end 166: end