#!/bin/bash
set -e


# config files
cp -a /hardware-setup/config/* /
# update apt because sources.list.d is also in config/*
apt-get update
apt-get dist-upgrade


# locales

echo 'console-setup console-setup/charmap47 select UTF-8' | debconf-set-selections
echo 'keyboard-configuration keyboard-configuration/variant select English (US)' | debconf-set-selections
echo 'keyboard-configuration kekeyboard-configuration keyboard-configuration/layout select English (US)' | debconf-set-selections
echo 'locales locales/default_environment_locale select en_US.UTF-8' | debconf-set-selections
echo 'locales locales/locales_to_be_generated multiselect en_US.UTF-8 UTF-8' | debconf-set-selections

apt-get -y install locales


### boot

apt-get -y install mdadm cryptsetup systemd systemd-sysv dropbear btrfs-tools

# generate minimal mdadm.conf
mdadm --examine --scan | perl -pe 's/.*\/dev\/md\/?([0-9]+) .*UUID\=(.+?) .*/ARRAY \/dev\/md$1 UUID=$2/' > /etc/mdadm/mdadm.conf

# concat user keys for cryptsetup unlocking at boot
cat /hardware-setup/authorized_keys/* > /etc/dropbear-initramfs/authorized_keys

# set dropbear port to something other than 22, because of openssh
sed -i 's/DROPBEAR_PORT=.*/DROPBEAR_PORT=222/' /etc/default/dropbear

# after cryptsetup, mdadm, ... because of update-initramfs
apt-get -y install linux-image-amd64

# install grub
apt-get -y install grub-efi-amd64
grub-install

# edit esp_uuid in fstab
esp_uuid=$(blkid --output value "/hardware-setup/hardware/${1}/esp" | head -n1)
sed -i "s/%esp_uuid%/${esp_uuid}/" /etc/fstab


### users

apt-get -y install sudo

for key in /hardware-setup/authorized_keys/*; do
    user=$(basename "$key")
    
    adduser --gecos '' --disabled-password "$user"
    
    mkdir -p /home/"$user"/.ssh
    cp "$key" /home/"$user"/.ssh/authorized_keys
    chown "$user": /home/"$user"/.ssh/authorized_keys
    
    adduser "$user" sudo
done

### Docker

apt-get -y install docker-ce


### administration tools

apt-get -y install \
    man-db \
    vim \
    iproute2 \
    openssh-server