#!/bin/bash

[ -f /.dockerenv ] || { echo "please run in supplied container"; exit 1; }
set -e

cat /config/packages-base.list | sed 's/=.*//g' > /etc/apt/packages.list

snapshot_url="http://snapshot.debian.org/archive/debian"
snapshot_date=$(date +"%Y%m%dT000000Z")
cat <<-EOF > /etc/apt/sources.list
deb http://deb.debian.org/debian bullseye main
deb http://security.debian.org/debian-security bullseye-security main
deb http://deb.debian.org/debian bullseye-updates main
deb [check-valid-until=no] ${snapshot_url}/${snapshot_date} bullseye main
deb [check-valid-until=no] ${snapshot_url}-security/${snapshot_date} bullseye-security main
deb [check-valid-until=no] ${snapshot_url}/${snapshot_date} bullseye-updates main
EOF

ARCH=$(uname -m)

apt-get update
apt-get install -y --download-only --reinstall $( \
	dpkg-query \
		-W \
		-f='${db:Status-Abbrev}\t${binary:Package} - ${binary:Summary}\n' \
	| awk -F'\t' '/^ii/ {print $2}' \
	| awk '{print $1}' \
)
apt-get install -y --download-only $(cat /config/packages-${ARCH}.list)

( cd /var/cache/apt/archives \
	&& find . -type f \( -iname \*.deb \) -exec sha256sum {} \; \
	| sed 's/.\///g' \
	| LC_ALL=C sort
) > /config/package-hashes-${ARCH}.txt

cp /dev/null /etc/apt/packages.list
for deb in /var/cache/apt/archives/*.deb; do
	package=$(dpkg-deb -f $deb Package);
	version=$(dpkg --info ${deb} | grep "^ Version: " | sed 's/^ Version: //g');
	echo "${package}=${version}" >> /config/packages-${ARCH}.list;
done