gems.rake

namespace :heroku do
  desc "writes a .gem config file for heroku based on the applications' gem config"
  task :gems => :environment do
    File.open(File.join(Rails.root, '.gems'), 'w') do |f|
      Rails.configuration.gems.each do |gem|
        f.write "#{gem.name} #{"--version #{gem.requirement}" if gem.requirement}\n"
      end
    end
  end
end