class Rake::Task

def invoke_prerequisites(task_args, invocation_chain) # :nodoc:

:nodoc:
Invoke all the prerequisites of a task. 
def invoke_prerequisites(task_args, invocation_chain) # :nodoc:
  prerequisite_tasks.each { |prereq|
    prereq_args = task_args.new_scope(prereq.arg_names)
    prereq.invoke_with_call_chain(prereq_args, invocation_chain)
  }
end