class Dependabot::PullRequestCreator::MessageBuilder

def truncate_pr_message(msg)
  return msg if pr_message_max_length.nil?
  msg = msg.dup
  msg = msg.force_encoding(T.must(pr_message_encoding)) unless pr_message_encoding.nil?
  if msg.length > T.must(pr_message_max_length)
    tr_msg = if pr_message_encoding.nil?
               TRUNCATED_MSG
             else
               (+TRUNCATED_MSG).dup.force_encoding(T.must(pr_message_encoding))
             end
    trunc_length = T.must(pr_message_max_length) - tr_msg.length
    msg = (T.must(msg[0..trunc_length]) + tr_msg)
  end
  # if we used a custom encoding for calculating length, then we need to force back to UTF-8
  msg = msg.encode("utf-8", "binary", invalid: :replace, undef: :replace) unless pr_message_encoding.nil?
  msg
end