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

Answer 1

In a script with Rails loaded (e.g. rails runner script.rb)

def rake(*tasks)
  tasks.each do |task|
    Rake.application[task].tap(&:invoke).tap(&:reenable)
  end
end

rake('db:migrate', 'cache:clear', 'cache:warmup')