post_install() {
    echo "Add yourself to the uucp group to access the serial ports:"
    echo "sudo usermod -a -G uucp <user>"
    echo "Please checkout the wiki for further information."
}

pre_upgrade() {
    if [[ $(vercmp 1:1.6.12-1 "$2") -eq 1 ]]; then
        echo "If arduino fails to install try to manually remove it first:"
        echo "sudo pacman -Rs arduino"
    fi
}

_1:1.6.12_1_changes() {
  echo ":: arduino is now split into arduino-builder, arduino-avr-core and arduino-docs"
  echo "   If arduino fails to run, check for a zombie folder:"
  echo "   ls -la /usr/share/arduino/hardware/avr"
  echo "   It might be left from a very old upgrade. Please remove it."
}

post_upgrade() {
    local v upgrades=(
      1:1.6.12-1
    )

    for v in "${upgrades[@]}"; do
      if [[ $(vercmp "$v" "$2") -eq 1 ]]; then
        "_${v//-/_}_changes"
      fi
    done
}