class Bundler::LockfileGenerator

def add_section(name, value)
  out << "\n#{name}\n"
  case value
  when Array
    value.map(&:to_s).sort.each do |val|
      out << "  #{val}\n"
    end
  when Hash
    value.to_a.sort_by {|k, _| k.to_s }.each do |key, val|
      out << "  #{key}: #{val}\n"
    end
  when String
    out << "   #{value}\n"
  else
    raise ArgumentError, "#{value.inspect} can't be serialized in a lockfile"
  end
end