msg() {
    ALL_OFF="\e[1;0m"
    BOLD="\e[1;1m"
    GREEN="${BOLD}\e[1;32m"
    local mesg=$1; shift
    printf "${GREEN}==>${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2
}

restore_conf() {
  PAMAC_NEW="$(date +%m%d%M%S)"
  if [ -f "/etc/pamac.conf.pacsave" ]; then
     msg "You had an old /etc/pamac.conf.pacsave file. We restore it for you."
     msg "You can find your new pamac.conf saved as \`/etc/pamac-new-${PAMAC_NEW}.conf\`"
     mv /etc/pamac.conf /etc/pamac-new-${PAMAC_NEW}.conf
     mv /etc/pamac.conf.pacsave /etc/pamac.conf
  fi
}

post_install() {
  # remove file (#28, #29)
  [[ -e /var/tmp/pamac/dbs/sync/refresh_timestamp ]] && rm -f /var/tmp/pamac/dbs/sync/refresh_timestamp
     # enable flatpak repo
  if [ -f /usr/bin/flatpak ]; then
    flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
  fi
  # enable systemd timers
  mkdir -p /etc/systemd/system/timers.target.wants
  ln -sf /usr/lib/systemd/system/pamac-cleancache.timer /etc/systemd/system/timers.target.wants/pamac-cleancache.timer
  # ln -sf /usr/lib/systemd/system/pamac-mirrorlist.timer /etc/systemd/system/timers.target.wants/pamac-mirrorlist.timer
  # polkit agent
  printf '==> An authentication agent is required\n'
  printf '    Cinnamon, Deepin, GNOME, GNOME Flashback, KDE, LXDE, LXQt, MATE and Xfce\n'
  printf '    have an authentication agent already.\n'
  printf '    See https://wiki.archlinux.org/index.php/Polkit#Authentication_agents\n'
  printf '    for other desktop environments.\n'
  # restore old conf
  restore_conf
}

post_upgrade() {
  # remove file (#28, #29)
  [[ -e /var/tmp/pamac/dbs/sync/refresh_timestamp ]] && rm -f /var/tmp/pamac/dbs/sync/refresh_timestamp

  # restore old conf
  if [ "$(vercmp $2 7.3.5-3)" -lt 0 ]; then
     restore_conf
  fi

  if [ "$(vercmp $2 8.0.3-5)" -lt 0 ]; then
     # remove wrong placed symlinks
     msg "Updating timer symlinks"
     [[ -e /etc/systemd/system/multi-user.target.wants/pamac-cleancache.timer ]] && rm -f /etc/systemd/system/multi-user.target.wants/pamac-cleancache.timer
     # [[ -e /etc/systemd/system/multi-user.target.wants/pamac-mirrorlist.timer ]] && rm -f /etc/systemd/system/multi-user.target.wants/pamac-mirrorlist.timer
     # enable systemd timers
     mkdir -p /etc/systemd/system/timers.target.wants
     ln -sf /usr/lib/systemd/system/pamac-cleancache.timer /etc/systemd/system/timers.target.wants/pamac-cleancache.timer
     # ln -sf /usr/lib/systemd/system/pamac-mirrorlist.timer /etc/systemd/system/timers.target.wants/pamac-mirrorlist.timer
  fi
}

post_remove() {
  # disable systemd timers
  rm -f /etc/systemd/system/timers.target.wants/pamac-cleancache.timer
  # rm -f /etc/systemd/system/timers.target.wants/pamac-mirrorlist.timer
}