gistfile1.rb

task :add_other_combined do
  if MANIFEST.target[:target_name] =~ /\/myapp/i
    tmp_entries = []
    tmp_entries.push MANIFEST.entry_for('someframework:javascript.js')
    tmp_entries.push MANIFEST.entry_for('anotherframework:javascript.js')
    tmp_entries.each { |e| 
      e.clean!
    }     
    MANIFEST.add_composite 'all_the_stuffs.js',
      :source_entries => tmp_entries,
      :entry_type => :javascript
  end
  
  
end

task 'manifest:prepare_build_tasks:combine' => :add_other_combined