Void Linux on the Raspberry Pi - SD-card install script for Headless use! Only tested on Zero W

create-pi.sh

#!/bin/bash
# This makes a readily bootable Voidlinux SD-Card for the raspberrypi
# Sets up some configs, making the Pi connect to wifi and sshd
#
# First boot up takes a very long time (5+ mins even) on a Zero W. Really give it time.
# For remedy on subsequent booting see: 
# https://wiki.voidlinux.org/Raspberry_Pi#Enabling_hardware_RNG_device

# SD-Card:
device="/dev/mmcblk0"
# .tar.xz void image
image="void-rpi*-PLATFORMFS-*.tar.xz"
# The wpa_supplicant.conf to copy over to the pi, so it can boot up
# ready to connect:
wpa_supplicant="/etc/wpa_supplicant/wpa_supplicant.conf"

rootfs="/tmp/rootfs"

[ ! -z "$1" ] && device=$1
[ ! -z "$2" ] && image=$2

help_msg(){
	echo "sudo $0 <mmc device> <tar.xz image>"
}

if [[ $UID != 0 ]]; then
    echo "Please run this script with sudo:"
    echo "sudo $0 $*"
    exit 1
fi

echo "This is not a safe script, read it through before running.
	Type yes to continue:
"
read ok

[ "$ok" != "yes" ] && exit 1
$([ "$@" -e "-h" ] || [ "$@" -e "--help" ]) && help_msg && exit

if ! [ -e "$device" ]; then
	echo "Device $device not found"
	exit
fi

parted --script $device \
	mktable msdos \
	mkpart primary fat32 2048s 256MB \
	toggle 1 boot \
	mkpart primary ext4 256MB 100%

mkfs.vfat $device"p1"
mkfs.ext4 -O '^has_journal' $device"p2"

mkdir $rootfs
mount $device"p2" $rootfs
mkdir $rootfs"/boot"
mount $device"p1" $rootfs"/boot"
tar xvfJp $image -C $rootfs
sync

echo '/dev/mmcblk0p1 /boot vfat defaults 0 0' >> $rootfs/etc/fstab

cp $wpa_supplicant $rootfs/etc/wpa_supplicant/wpa_supplicant.conf

echo "raspberrypi" > $rootfs/etc/hostname

echo "
ln -s /etc/sv/wpa_supplicant /etc/runit/runsvdir/default/
ln -s /etc/sv/dhcpcd /etc/runit/runsvdir/default/
ln -s /etc/sv/sshd /etc/runit/runsvdir/default/
ln -s /etc/sv/chronyd /etc/runit/runsvdir/default/
reboot
" > $rootfs/etc/first-run.sh
chmod +x $rootfs/etc/first-run.sh

echo "
[ -f '/etc/first-run.sh' ] && sh /etc/first-run.sh && rm /etc/first-run.sh
" >> $rootfs/etc/rc.local

# Needed for logging in if after updating, one forgets to create a user
# LibreSSL blocks root login
echo "PermitRootLogin yes" >> $rootfs/etc/ssh/sshd_config

echo "
root ALL=(ALL) ALL
%wheel ALL=(ALL) NOPASSWD: ALL
%sudo   ALL=(ALL) ALL
" > $rootfs/etc/sudoers.d/auto

echo "
gpu_mem=16
" >> $rootfs/boot/config.txt

echo 'FORCEFSCK="-f"' >> $rootfs/etc/rc.conf

umount $rootfs"/boot" $rootfs