paste.rb

def patch_argv
  # remove everything after -- so rake doesn't get confused and think it's tasks
  # save it in EXTRA_ARGS
  sep = ARGV.index("--") || ARGV.length
  real_args, extra_args = ARGV.take(sep), ARGV.drop(sep + 1)
  ARGV.clear
  real_args.each { |arg| ARGV << arg }

  # erroneously, rake will have interpreted the words after -- as tasks
  # so now we get to remove them manually
  rake_tasks = Rake.application.top_level_tasks
  extra_args.each do |arg|
    # remove from back to arg
    pos = rake_tasks.rindex arg
    if pos
      rake_tasks = rake_tasks.take(pos)
    end
  end
  Rake.application.instance_variable_set(:@top_level_tasks, rake_tasks)

  extra_args
end
EXTRA_ARGS = patch_argv

def patch_argv
  sep = ARGV.index("--") || ARGV.length
  real_args, extra_args = ARGV.take(sep), ARGV.drop(sep + 1)
  ARGV.replace real_args

  rake_tasks = Rake.application.top_level_tasks
  Rake.application.instance_variable_set(
    :@top_level_tasks,
    rake_tasks.take extra_args.map{ |arg| rake_tasks.rindex arg }.min
  )
  extra_args
end
EXTRA_ARGS = patch_argv