#!/bin/bash
# I, Ian Kelling, follow the GNU license recommendations at
# https://www.gnu.org/licenses/license-recommendations.en.html. They
# recommend that small programs, < 300 lines, be licensed under the
# Apache License 2.0. This file contains or is part of one or more small
# programs. If a small program grows beyond 300 lines, I plan to switch
# its license to GPL.

# Copyright 2024 Ian Kelling

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR


host=$1

case $host in
  je)
    ip6=2001:ba8:1f1:f09d
    ip4=85.119.82.128
    ;;
  bk)
    ip6=2001:ba8:1f1:f0c9
    ip4=85.119.83.50
    ;;
esac

debconf-set-selections <<'EOF'
locales locales/default_environment_locale select en_US.UTF-8
locales locales/locales_to_be_generated multiselect en_US.UTF-8 UTF-8
EOF

# /a/bin/fai/fai/config/hooks/updatebase.UBUNTU
# shellcheck disable=SC2016
debconf --owner=locales sh -c '
   . /usr/share/debconf/confmodule
   db_version 2.0
   db_get locales/locales_to_be_generated &&
   mkdir -p /var/lib/locales/supported.d &&
   echo "$RET" > /var/lib/locales/supported.d/local'
dpkg-reconfigure -fnoninteractive locales

apt -y remove --purge --auto-remove netplan.io libnetplan0
apt update
apt -y install linux-virtual-hwe-20.04 grub-pc-bin openssh-server ifupdown rsync
mkdir -p /root/.ssh
chmod 700 /root/.ssh
cat >/root/.ssh/authorized_keys <<'EOF'
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDX42yru/h6r6UDRy/VwVZjcYEmNLG5/SUjv7xwu43OaW0wL+uHYg2rkfn4Ygh5o1I5pgBh2SWg8TeWuVGhgL1SCuBzzeai/+58Sny065Qak+D2WjVOuRonRelh+CBA5EpNZPuiWQkoWdf9NACTBCbS2Zu7r8OOgRqu/ruaDNePlG5+U0Wlpy3oBnpbzQiuSA3AKMW30fsCJtOBjz5qQaiPbYEKJy3AOvtbq10wliKx9TpsTzrq8dKWs7PLhZnzqVCsaq6D95IzjqXcSpx4Cga5bn+YEuAnJQ53PGA5eO+hpz6HDmawTbJlaV/Dufb9bJ/ZZy1DXzs07yWRtTEY54/X ian@iankelling.org
EOF

# https://tools.bitfolk.com/wiki/IPv6
cat >/etc/network/interfaces <<EOF
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
  address $ip4/21
  gateway 85.119.80.1

iface eth0 inet6 static
    address $ip6::2
    netmask 64
    gateway $ip6::1
    post-up echo 0 > /proc/sys/net/ipv6/conf/default/accept_ra
    post-up echo 0 > /proc/sys/net/ipv6/conf/all/accept_ra
    post-up echo 0 > /proc/sys/net/ipv6/conf/\$IFACE/accept_ra
    post-up echo 0 > /proc/sys/net/ipv6/conf/default/autoconf
    post-up echo 0 > /proc/sys/net/ipv6/conf/all/autoconf
    post-up echo 0 > /proc/sys/net/ipv6/conf/\$IFACE/autoconf
EOF

cat >/etc/fstab <<'EOF'
/dev/xvda1 / ext4 noatime,nodiratime 0 1
/dev/xvdb1 none swap nofail,x-systemd.device-timeout=30s,x-systemd.mount-timeout=30s,sw  0 0
EOF

cat >> /etc/default/grub <<'EOF'
GRUB_CMDLINE_LINUX_DEFAULT=""
GRUB_CMDLINE_LINUX="console=hvc0"
EOF

update-grub

cat >/etc/systemd/resolved.conf.d/servers.conf <<'EOF'
[Resolve]
DNS=85.119.80.232 85.119.80.233
Domains=~.
EOF

cat >/etc/hostname <<EOF
$host
EOF

# from fai/fai/config/scripts/FAIBASE/10-misc

TIMEZONE=US/Eastern
echo $TIMEZONE >/etc/timezone
if [[ -L /etc/localtime ]]; then
  ln -sf /usr/share/zoneinfo/${TIMEZONE} /etc/localtime
else
  cp -f /usr/share/zoneinfo/${TIMEZONE} /etc/localtime
fi


echo $0 SUCCESS