#!/bin/bash
set -e -u -o pipefail

ARCH="amd64"
BUILD="/var/univention/buildsystem2"
APT="${BUILD}/apt"
PBUILDER="${BUILD}/pbuilder"

main () {
	header "$@"
	setup_tmp
	parse_yaml "$@"
	mount_build
	find_debs
	run_tests
}

header () {
	echo "INFO: $0 $*"
	echo "INFO: ${SSH_ORIGINAL_COMMAND:-}"
}

setup_tmp () {
	tmp=$(mktemp -d)
	trap "rm -rf '$tmp'" EXIT
}

parse_yaml () {
	yaml="$tmp/yaml"
	cat ${1+"$1"} >"$yaml"
	exec </dev/null

	scope="$(sed -ne s'/^scope: *//p' "$yaml")"
	src="$(sed -ne s'/^src: *//p' "$yaml")"
	fix="$(sed -ne s'/^fix: *//p' "$yaml")"
	versions="$(sed -rne s'/^version: *\[([0-9, ]+)\] *$/\1/;T;s/[, ]+/ /g;p' "$yaml")"

	major=${scope:4:1}
	max_minor=${scope:6:1}
	max_patch=${scope:20:1}
}

mount_build () {
	mountpoint -q "$BUILD" ||
		mount "$BUILD"
}

find_debs () {
	debs="$tmp/debs"
	for changes in "${APT}/${scope}/"*"/${src}_${fix}_"*".changes"
	do
		dcmd "$changes"
	done |
	sed -rne "s,^(.*)/[^/]+/([^_]+_[^_]+_(${ARCH}|all)\.deb)$,\1/\3/\2,p" >"$debs"
}

gen_apt () {
	{
		cat <<__TEXT__
#!/bin/bash
cat <<__APT__ >/etc/apt/apt.conf.d/20secureapt
APT::Get::AllowUnauthenticated "true";
APT::Get::Force-Yes "true";
__APT__

cat <<'__APT__' >/etc/apt/sources.list
__TEXT__
		for ((minor=0;minor<max_minor;minor++))
		do
			patch=
			while [ -s "$PBUILDER/ucs_${major}.${minor}-0${patch:+-ucs${major}.${minor}-${patch}}_${ARCH}.tgz" ]
			do
				_gen_apt "$major" "$minor" "${patch:-0}"
				let patch=${patch:-0}+1
			done
		done
		for ((patch=0;patch<=max_patch;patch++))
		do
			_gen_apt "$major" "$minor" "$patch"
		done
		_gen_apt "$major" "$minor" "$max_patch" "-errata"
		cat <<__TEXT__
__APT__

apt-get update
__TEXT__
	} >"$tmp/post_setup_apt"
	chmod +x "$tmp/post_setup_apt"

	cat <<__TEXT__ >"$tmp/pre_upgrade_apt"
#!/bin/bash
cat <<'__APT__' >>/etc/apt/sources.list
deb http://omar.knut.univention.de/build2 ucs_${major}.${minor}-0-errata${major}.${minor}-${max_patch}/all/
deb http://omar.knut.univention.de/build2 ucs_${major}.${minor}-0-errata${major}.${minor}-${max_patch}/\$(ARCH)/
__APT__

apt-get update
__TEXT__
	chmod +x "$tmp/pre_upgrade_apt"
	ln -f "$tmp/pre_upgrade_apt" "$tmp/pre_install_apt"
}
_gen_apt () {
	local base="deb http://univention-repository.knut.univention.de"
	echo "${base}/${1}.${2}/maintained/${4:+component/}   ${1}.${2}-${3}${4:-}/all/"
	echo "${base}/${1}.${2}/maintained/${4:+component/}   ${1}.${2}-${3}${4:-}/\$(ARCH)/"
	echo "${base}/${1}.${2}/unmaintained/${4:+component/} ${1}.${2}-${3}${4:-}/all/"
	echo "${base}/${1}.${2}/unmaintained/${4:+component/} ${1}.${2}-${3}${4:-}/\$(ARCH)/"
}

run_tests () {
	local rc=0 patch
	for patch in $versions
	do
		echo "INFO: $major.$max_minor-$patch"
		max_patch=$patch gen_apt
		while read deb
		do
			run_test "$deb"
			echo
		done <"$debs"
	done
	exit $rc
}
run_test () {
	local lrc deb="$1"
	echo "INFO: $deb"
	if piuparts \
		--defaults=debian --distribution=sid \
		--basetgz="${PBUILDER}/${scope}_${ARCH}.tgz" --keep-sources-list \
		--scriptsdir="$tmp" \
		--no-symlinks \
		--warn-on-others \
		--ignore=/etc/apt/sources.list \
		--ignore=/usr/lib/libncurses.so.5 \
		--ignore-regex='var/log/.*' \
		--ignore-regex='var/lib/apt/lists/.*' \
		"$deb"
	then
		lrc=$?
		echo "SUCCESS: $lrc (rc=$rc)"
	else
		lrc=$? rc=$?
		echo "ERROR: $lrc (rc=$rc)"
		sleep 5
	fi
}

colorize () {
	: ${red:=$(tput setaf 1)} ${green:=$(tput setaf 2)} ${yellow:=$(tput setaf 3)} ${blue:=$(tput setaf 4)} ${reset:=$(tput op)}
	sed -r \
		-e "s/^([0-9]+m[0-9.]+s )?ERROR: /$red&/;t" \
		-e "s/^([0-9]+m[0-9.]+s )?SUCCESS: /$green&/;t" \
		-e "s/^([0-9]+m[0-9.]+s )?INFO: /$yellow&/;t" \
		-e "s/^([0-9]+m[0-9.]+s )?DEBUG: /$blue&/;t" \
		-e "s/^([0-9]+m[0-9.]+s )?DUMP: /$reset&/;t" \
		-e "s/^[0-9]+m[0-9.]+s /$reset&/;t"
}
if [ -t 2 ]
then
	main "$@" | colorize
else
	main "$@"
fi