# File lib/rake.rb, line 2388
2388:     def collect_tasks(argv)
2389:       @top_level_tasks = []
2390:       argv.each do |arg|
2391:         if arg =~ /^(\w+)=(.*)$/
2392:           ENV[$1] = $2
2393:         else
2394:           @top_level_tasks << arg unless arg =~ /^-/
2395:         end
2396:       end
2397:       @top_level_tasks.push("default") if @top_level_tasks.size == 0
2398:     end