#!/bin/sh

# LEdoian's absurdly simple initrd generator (ad-hoc arc)

here="$(dirname "$0")"

set -eu
outdir="$1"

mkdir "$outdir/initrd"
cp "$here/init" "$outdir/initrd/"

busybox="$(which busybox)"
cp "$busybox" "$outdir/initrd/busybox"

# TODO: get kernel version from /boot/vmlinuz-linux (which we use)
kver="$(uname -r)"
zstdcat /usr/lib/modules/$kver/kernel/drivers/net/ethernet/intel/e1000/e1000.ko.zst > "$outdir/initrd/e1000.ko"

pushd "$outdir/initrd"
find . | cpio -o -H newc > ../initrd.img
popd