Useful rake helpers.rb

Rake::TaskManager.class_eval do
  def remove_task(*task_name)
    [*task_name].each { |task| @tasks.delete(task.to_s) }
  end
  
  def rename_task(old_name, new_name)
    old = @tasks.delete old_name.to_s
    old.instance_variable_set :@name, new_name.to_s
    @tasks[new_name.to_s] = old
  end
end