How do I rake tasks within a ruby script?

I've got a Rakefile with a rake task that I would normally call from the commandline (rake blog:post Title).

I'd like to write a ruby script that calls that rake task multiple times, but the only solution I see is shelling out (`` or system).

What's the right way to do this?

From stackoverflow mando

• from timocracy.com:

  require 'rake'
  require 'rake/rdoctask'
  require 'rake/testtask'
  require 'tasks/rails'
  
  def capture_stdout
    s = StringIO.new
    oldstdout = $stdout
    $stdout = s
    yield
    s.string
  ensure
    $stdout = oldstdout
  end
  
  Rake.application.rake_require '../../lib/tasks/metric_fetcher'
  results = capture_stdout {Rake.application['metric_fetcher'].invoke}
  

  From Titanous

• Works like a charm. Now to fix my rake task :).

  From mando