almalinux-raspi3.sh

#!/bin/bash -xe

MOUNTPOINT=$(mktemp -d)
CHECKSUM=$(mktemp)
LODEV=$(losetup -f)

IMAGE_FILE=AlmaLinux-9-RaspberryPi-GNOME-latest.aarch64.raw.xz
IMAGE_URL=$(curl -s https://mirrors.almalinux.org/mirrorlist/9/raspberrypi/ | \
            sort -R | head -n1 | grep -o "^.*almalinux/" )/9/raspberrypi/images/

cd /tmp

wget -c ${IMAGE_URL}CHECKSUM
wget -c ${IMAGE_URL}${IMAGE_FILE}

grep ${IMAGE_FILE} CHECKSUM > ${CHECKSUM}
sha256sum --check ${CHECKSUM}
xz -k -d ${IMAGE_FILE}

sudo -v
sudo partx -a ${IMAGE_FILE//.xz/}
sudo mount ${LODEV}p3 ${MOUNTPOINT}

sudo bash -c "echo 'blacklist brcmfmac' > ${MOUNTPOINT}/etc/modprobe.d/raspi-blacklist.conf"
cat -n ${MOUNTPOINT}/etc/modprobe.d/raspi-blacklist.conf
sudo umount ${MOUNTPOINT}
sudo losetup -d ${LODEV}

rmdir  ${MOUNTPOINT}
rm -f ${CHECKSUM}

echo "Finished! ${IMAGE_FILE//.xz/} has been modified for Pi 3!".

See also: AlmaLinux/raspberry-pi#17