message: Improve updating lists
diff: @@ -25,9 +25,20 @@ read_env() {
  [ "$runner" = false ] && [[ -n ${RUNNER} ]] && runner="${RUNNER}"
  }
  +# Function to backup and cleanup package lists.
  +cleanup_lists() {
  + if [ ! -e /etc/apt/sources.list.d.save ]; then
  + sudo mv /etc/apt/sources.list.d /etc/apt/sources.list.d.save
  + sudo mkdir /etc/apt/sources.list.d
  + sudo mv /etc/apt/sources.list.d.save/*ondrej*.list /etc/apt/sources.list.d/
  + trap "sudo mv /etc/apt/sources.list.d.save/*.list /etc/apt/sources.list.d/" exit
  + fi
  +}
  +
  # Function to update the package lists.
  update_lists() {
  if [ "$lists_updated" = "false" ]; then
  + cleanup_lists
  sudo "$debconf_fix" apt-get update >/dev/null 2>&1
  lists_updated="true"
  fi
  @@ -36,6 +47,7 @@ update_lists() {
  # Function to add ppa:ondrej/php.
  add_ppa() {
  if ! apt-cache policy | grep -q ondrej/php; then
  + cleanup_lists
  LC_ALL=C.UTF-8 sudo apt-add-repository ppa:ondrej/php -y
  if [ "$DISTRIB_RELEASE" = "16.04" ]; then
  sudo "$debconf_fix" apt-get update
  