#!/bin/sh
# inspired by https://github.com/umiddelb/z2d/tree/master/pine64

display_usage() {
    echo "$0 </dev/mmcblk0> </mnt/SD>"
}

SD_DEV=$1
SD_MOUNT_POINT=$2

[ "x$1" == "x" ] && display_usage && exit
[ "x$2" == "x" ] && display_usage && exit

[[ "x$UID" != "x0" ]] && echo "run as root" && exit

if $(df | grep /$ | grep -q "^$SD_DEV"); then
    echo "Target and current system device are the same. Can't do that!"
    exit
fi

SIMPLEIMAGE_VERSION=${SIMPLEIMAGE_VERSION:-"latest"}
LINUX_VERSION=${LINUX_VERSION:-"latest"}
SLACKWARE_VERSION=${SLACKWARE_VERSION:-"14.2"}
SLACKWARE_MINIROOTFS_VERSION=${SLACKWARE_MINIROOTFS_VERSION:-"01Jul16"}

echo "Going further will wipe ${SD_DEV} and you _will_ lose all data on it !"
echo "/!\\ LAST CHANCE TO HIT Ctrl-C /!\\"
read

wget -c https://www.stdin.xyz/downloads/people/longsleep/pine64-images/simpleimage-pine64-${SIMPLEIMAGE_VERSION}.img.xz
unxz simpleimage-pine64-${SIMPLEIMAGE_VERSION}.img.xz
dd if=simpleimage-pine64-${SIMPLEIMAGE_VERSION}.img of=$SD_DEV bs=1024

/bin/echo -e "d\n2\nn\np\n2\n143360\n\nw\n" | sudo fdisk $SD_DEV

sudo mkfs.ext4 -O ^has_journal -b 4096 -L rootfs -U deadbeef-dead-beef-dead-beefdeadbeef ${SD_DEV}p2

mount ${SD_DEV}p2 $SD_MOUNT_POINT

mkdir -p $SD_MOUNT_POINT/bootenv
mount ${SD_DEV}p1 $SD_MOUNT_POINT/bootenv

wget -c http://slackware.uk/slackwarearm/slackwarearm-devtools/minirootfs/roots/slack-${SLACKWARE_VERSION}-miniroot_${SLACKWARE_MINIROOTFS_VERSION}.tar.xz
tar --numeric-owner -C $SD_MOUNT_POINT/ -xpJf slack-${SLACKWARE_VERSION}-miniroot_${SLACKWARE_MINIROOTFS_VERSION}.tar.xz

wget -c https://www.stdin.xyz/downloads/people/longsleep/pine64-images/linux/linux-pine64-${LINUX_VERSION}.tar.xz
tar --numeric-owner -C $SD_MOUNT_POINT/ -xpJf linux-pine64-${LINUX_VERSION}.tar.xz
cp -R $SD_MOUNT_POINT/boot/* $SD_MOUNT_POINT/bootenv/

cat <<EOF > $SD_MOUNT_POINT/root/update_kernel.sh
#!/bin/sh
wget -c https://www.stdin.xyz/downloads/people/longsleep/pine64-images/linux/linux-pine64-${LINUX_VERSION}.tar.xz

tar --numeric-owner -C / -xpJf linux-pine64-${LINUX_VERSION}.tar.xz
rm linux-pine64-${LINUX_VERSION}.tar.xz

cp -R /boot/* /bootenv/
EOF
chmod +x $SD_MOUNT_POINT/root/update_kernel.sh

cat <<EOF > $SD_MOUNT_POINT/etc/modprobe.d/blacklist
8723bs_vq0
EOF

cat <<EOF >> $SD_MOUNT_POINT/etc/rc.d/rc.modprobe.local
/sbin/modprobe 8723bs
EOF

umount $SD_MOUNT_POINT/bootenv
umount $SD_MOUNT_POINT

curl -s ftp://ftp.arm.slackware.com/slackwarearm/slackwarearm-devtools/minirootfs/roots/slack-${SLACKWARE_VERSION}-miniroot_details.txt | grep -C1 "User"

sync