Example of extended parallel namespace within rake task

parallel_all.rake

namespace :parallel do
  desc "run all main specs, plugin_name specs and features in parallel with parallel:all[num_cpus]"
  task :all, :count do |t, args|
    Rake::Task['parallel:features'].execute(:count => args[:count])
    Rake::Task['parallel:spec'].execute(:count => args[:count], :path_prefix => '../vendor/plugins/plugin_name/spec')
    Rake::Task['parallel:spec'].execute(:count => args[:count])
  end
end