abslibre/pcr/mailpile/mailpile.install

post_install() {
  post_upgrade $1

  echo ""
  echo "==> Note: Mailpile is still in development and not"
  echo "==>       suitable for production or end-user use."
  echo ""
  echo "==> Get more info at:"
  echo "==> https://github.com/pagekite/Mailpile/wiki/Getting-started"
  echo ""
}

# arg 2:  the old package version
post_upgrade() {
  if ! getent group mailpile >/dev/null; then
    groupadd --system mailpile 
  fi

  if ! getent passwd mailpile >/dev/null; then 
    useradd --system -c 'mailpile daemon user' -g mailpile -b /var/lib -m -s /bin/bash mailpile >/dev/null 2>&1
  elif ! test -d /var/lib/mailpile; then
    mkhomedir_helper mailpile
  fi

  if test $2 && test "`vercmp $2 0.4.1-1`" -lt 0; then
    echo '==> Mailpile home directory has moved to /var/lib/mailpile'
  fi
}

post_remove() {
  systemctl stop mailpile >/dev/null 2>&1

  echo "==> Note: /var/lib/mailpile may still contain data" 
}