gistfile1.txt

#!/bin/sh

# apk add blkid parted dosfstools e2fsprogs wget tar
set -eu

: "${DISK:=/dev/sdb}"
#if [ $DISK = "/dev/sdX" ]; then
#  echo "DISK is not set correctly"
#  exit
#fi

readonly SCRIPT="${0##*/}"
#readonly TMPDIR="$(mktemp -dt "${SCRIPT%.*}".XXXXXX)"
readonly TMPDIR="/mmc"
readonly BOOTDEV="$DISK"1
readonly ROOTDEV="$DISK"2
readonly APK_KEY="alpine-devel@lists.alpinelinux.org-60ac2099.rsa.pub"
readonly MIRROR="http://dl-cdn.alpinelinux.org/alpine"

cleanup() {
	set +e
	mountpoint -q "$TMPDIR"/boot && umount "$TMPDIR"/boot
	mountpoint -q "$TMPDIR" && umount "$TMPDIR"
	#rm -rf "$TMPDIR"
}

trap cleanup EXIT INT
kernel='linux-sunxi-5.17.5-r0.apk'
if [ ! -f $kernel ]; then
  wget https://dev.alpinelinux.org/~mps/sunxi/"$kernel"
fi

echo "Paritioning disk"
# fat32 512, ext4 8GB
parted -s "$DISK" mktable msdos > /dev/null
parted -s "$DISK" unit s -- mkpart primary ext4 8192 1056767 > /dev/null
parted -s "$DISK" unit s -- mkpart primary ext4 1056768 17833983 > /dev/null

echo "Creating dirs and mounting"
mkfs.ext4 -qL boot "$BOOTDEV"
mkfs.ext4 -qL root "$ROOTDEV"
#mkfs.f2fs -f -l root "$ROOTDEV"
#mount -t f2fs "$ROOTDEV" "$TMPDIR"
mount -t ext4 "$ROOTDEV" "$TMPDIR"
mkdir -p "$TMPDIR"/boot
mkdir -p "$TMPDIR"/etc/apk/keys
mount -t ext4 "$BOOTDEV" "$TMPDIR"/boot

echo "Setup apk keys and repositories"
MPS_KEY="mps@arvanta.net-5a88c744.rsa.pub"
wget -qP "$TMPDIR"/etc/apk/keys https://alpinelinux.org/keys/"$APK_KEY"
wget -qP "$TMPDIR"/etc/apk/keys https://www.arvanta.net/mps/aports-local/"$MPS_KEY"
printf "$MIRROR/edge/%s\n" main community testing > "$TMPDIR"/etc/apk/repositories
printf "https://www.arvanta.net/mps/aports-local\n" >> "$TMPDIR"/etc/apk/repositories

echo "installing base packages"
apk --allow-untrusted --root "$TMPDIR" --arch aarch64 --initdb add \
	alpine-base alpine-baselayout alpine-conf kmod openrc \
	dbus util-linux blkid chrony u-boot-sunxi \
	sysfsutils ssl_client ca-certificates-bundle alpine-keys \
	ethtool e2fsprogs libudev-zero libudev-zero-helper \
	iwd agetty openresolv tar wget linux-sunxi \
	linux-firmware-rtlwifi iw wpa_supplicant

dd if="$TMPDIR"/usr/share/u-boot/a64-olinuxino-emmc/u-boot-sunxi-with-spl.bin of=$DISK bs=8k seek=1
echo "Setting up services and inittab"
for rc in boot/bootmisc boot/hostname boot/modules boot/sysctl boot/urandom boot/networking \
	boot/syslog boot/klogd \
	sysinit/devfs sysinit/hwdrivers sysinit/mdev sysinit/modules \
	shutdown/mount-ro shutdown/killprocs \
	default/dbus default/chronyd default/iwd; do
	ln -s /etc/init.d/"${rc##*/}" "$TMPDIR"/etc/runlevels/"$rc"
done

mkdir -p "$TMPDIR"/boot/extlinux
partuuid=`fdisk -l $DISK | grep 'Disk identifier:'|  cut -d ' ' -f 3 | cut -d 'x' -f 2`
ROOTPART="$partuuid-02"
BOOTPART="$partuuid-01"
console='console=${console}'

echo "Creating extlinux.conf"
cat > "$TMPDIR"/boot/extlinux/extlinux.conf<<EOF
TIMEOUT 50
PROMPT 1
DEFAULT sunxi

MENU TITLE Alpine on Olinuxino MMC

LABEL sunxi
MENU LABEL sunxi
KERNEL /vmlinuz-sunxi
FDTDIR /dtbs-sunxi
APPEND modules=sd-mod,usb-storage,ext4,f2fs,sunxi-mmc root=PARTUUID=$ROOTPART rw rootwait $console
EOF

sed -i 's/^#ttyS0/ttyS0/' $TMPDIR/etc/inittab
sed -i 's/^ttyS0.*/ttyS0::respawn:\/sbin\/agetty -L 115200 ttyS0 linux --login-pause --autologin root --noclear/' $TMPDIR/etc/inittab

echo "Finished, cleaning up"