How do I run Rake tasks within a Ruby script?

Question

I have a Rakefile with a Rake task that I would normally call from the command line:

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 using `` (backticks) or system.

What's the right way to do this?

Answer 1

from timocracy.com:

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

Answer 2

This works with Rake version 10.0.3:

require 'rake' app = Rake.application app.init # do this as many times as needed app.add_import 'some/other/file.rake' # this loads the Rakefile and other imports app.load_rakefile  app['sometask'].invoke 

As knut said, use reenable if you want to invoke multiple times.