# File lib/rake/application.rb, line 537
537:     def collect_tasks
538:       @top_level_tasks = []
539:       ARGV.each do |arg|
540:         if arg =~ /^(\w+)=(.*)$/
541:           ENV[$1] = $2
542:         else
543:           @top_level_tasks << arg unless arg =~ /^-/
544:         end
545:       end
546:       @top_level_tasks.push("default") if @top_level_tasks.size == 0
547:     end