#!/bin/bash
set -euo pipefail
shopt -s inherit_errexit
if [ ! "${UID}" == "0" ]; then
	echo ":: Error: root user required"
	exit 1
fi
DISTRIBUTION=archlinux
ARCH=x86_64
echo ":: Generating rootfs for ${DISTRIBUTION}-${ARCH}"
if [ -f "./${DISTRIBUTION}-${ARCH}.tar.gz" ]; then
	echo ":: Removing ${DISTRIBUTION}-${ARCH}.tar.gz"
	rm -rf "./${DISTRIBUTION}-${ARCH}.tar.gz"
fi
if [ -f "./${DISTRIBUTION}-${ARCH}.tar" ]; then
	echo ":: Removing ${DISTRIBUTION}-${ARCH}.tar"
	rm -rf "./${DISTRIBUTION}-${ARCH}.tar"
fi
if [ -d "./${DISTRIBUTION}-${ARCH}" ]; then
	echo ":: Removing ${DISTRIBUTION}-${ARCH}"
	rm -rf "./${DISTRIBUTION}-${ARCH}"
fi
mkdir -p "./${DISTRIBUTION}-${ARCH}"
cd "./${DISTRIBUTION}-${ARCH}"
echo ":: Installing system"
pacstrap -c -G -K -M . base archlinux-keyring
echo ":: Unmounting (safety measure)"
bash -c "umount ./{dev/pts,dev/shm,dev,sys,proc,run};exit 0"
echo ":: Archiving rootfs"
tar --acls -cpf "../${DISTRIBUTION}-${ARCH}.tar" ./*
cd ..
rm -rf "./${DISTRIBUTION}-${ARCH}"
echo ":: Compressing rootfs"
gzip --best ${DISTRIBUTION}-${ARCH}.tar
rm -rf "./${DISTRIBUTION}-${ARCH}.tar"
echo ":: Generated rootfs for ${DISTRIBUTION}-${ARCH}"