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

You can use invoke and reenable to execute the task a second time.

Your example call rake blog:post Title seems to have a parameter. This parameter can be used as a parameter in invoke:

Example:

require 'rake'
task 'mytask', :title do |tsk, args|
  p "called #{tsk} (#{args[:title]})"
end



Rake.application['mytask'].invoke('one')
Rake.application['mytask'].reenable
Rake.application['mytask'].invoke('two')

Please replace mytask with blog:post and instead the task definition you can require your rakefile.

This solution will write the result to stdout - but you did not mention, that you want to suppress output.

---

Interesting experiment:

You can call the reenable also inside the task definition. This allows a task to reenable himself.

Example:

require 'rake'
task 'mytask', :title do |tsk, args|
  p "called #{tsk} (#{args[:title]})"
  tsk.reenable  #<-- HERE
end

Rake.application['mytask'].invoke('one')
Rake.application['mytask'].invoke('two')

The result (tested with rake 10.4.2):

"called mytask (one)"
"called mytask (two)"