infodir=/usr/share/info
filelist=(polipo.info)

create_polipo_user() {
  getent group polipo &>/dev/null || groupadd -g 185 polipo >/dev/null
  getent passwd polipo &>/dev/null || useradd -u 185 -g polipo \
                                              -d /var/cache/polipo \
                                              -c 'Caching web proxy' \
                                              -s /bin/nologin polipo >/dev/null
}

post_install() {
  [ -x usr/bin/install-info ] || return 0
  for file in ${filelist[@]}; do
    install-info $infodir/$file $infodir/dir 2> /dev/null
  done
  create_polipo_user
}

post_upgrade() {
  if [[ $(vercmp $2 1.0.4.1-11) -le 0 ]]; then
    echo Stopping polipo service in order to modify the user/group.
    systemctl stop polipo

    # in case the user/group were already created as recommended by the wiki
    userdel polipo &>/dev/null
    groupdel polipo &>/dev/null

    create_polipo_user
    chown -R 185:185 /var/cache/polipo

    echo You may now restart the polipo service.
  fi

  post_install $1
}

pre_remove() {
  [ -x usr/bin/install-info ] || return 0
  for file in ${filelist[@]}; do
    install-info --delete $infodir/$file $infodir/dir 2> /dev/null
  done
}

post_remove() {
  getent passwd polipo &>/dev/null && userdel polipo >/dev/null
  getent group polipo &>/dev/null && groupdel polipo >/dev/null
  true
}

# vim:set ts=2 sw=2 et: