# File lib/heroku/command/keys.rb, line 61
      def find_key
        %w(rsa dsa).each do |key_type|
          keyfile = "#{home_directory}/.ssh/id_#{key_type}.pub"
          return keyfile if File.exists? keyfile
        end
        raise CommandFailed, "No ssh public key found in #{home_directory}/.ssh/id_[rd]sa.pub.  You may want to specify the full path to the keyfile."
      end