#!/bin/sh
# Nico Schottelius, 2019-12-09

if [ $# -ne 1 ]; then
    echo $0 suite
    echo suite is for instance ascii, beowulf, etc
    exit 1
fi

suite=$1; shift

date=$(date +%F)

dir=${suite}-${date}
kernel=${dir}-kernel
keyurl=https://code.ungleich.ch/ungleich-public/__ungleich_staff_ssh_access/raw/master/files

debootstrap "${suite}" "${dir}"
chroot ${dir} apt install  -y openssh-server rdnssd linux-image-amd64

cat > ${dir}/etc/network/interfaces << EOF
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet6 auto
EOF

mv ${dir}/boot/vmlinuz-* ${kernel}
rm ${dir}/boot/initrd*
mkdir -p ${dir}/root/.ssh

for key in balazs dominique jinguk nico; do
    curl -s ${keyurl}/${key}.pub >> ${dir}/root/.ssh/authorized_keys
done

# ensure there is /init in the initramfs -> otherwise there is a kernel panic
# reason: initramfs is designed to be PRE regular os, so /init usually hands over to /sbin/init
# in our case, they are just the same
ln -s /sbin/init ${dir}/init

( cd ${dir} ; find . | cpio -H newc -o | gzip -9 > ../${dir}-initramfs )