#! /bin/zsh
#
# this file:
#   https://dataswamp.org/~incal/conf/.zsh/rpi

RPI_MODEL=3
SD_CARD=/dev/sdb
DEBIAN_RELEASE=bullseye

rpios_code=${RPI_MODEL}_${DEBIAN_RELEASE}
rpios_file=raspi_${rpios_code}.img.xz
rpios_url=https://raspi.debian.net/daily/raspi_${rpios_file}

rpios-url () {
    echo $rpios_url
}

rpios-get () {
    apt update && apt upgrade
    wget $rpios_url
}

rpios-check () {
    wget ${rpios_url}.sha256
    sha256sum -c ${rpios_file}.sha256
}

rpios-install () {
    su -c "xzcat ${rpios_file} | dd of=${SD_CARD} bs=64k oflag=dsync status=progress"
}

rpios-upgrade () {
    apt update && apt upgrade
    tasksel install --new-install standard
}