# File lib/rake.rb, line 354 354: def needed? 355: return true unless File.exist?(name) 356: latest_prereq = @prerequisites.collect{|n| Task[n].timestamp}.max 357: return false if latest_prereq.nil? 358: timestamp < latest_prereq 359: rescue Errno::ENOENT => ex # one of the prereqs does not exist 360: raise unless $dryrun or $trace 361: true 362: end