#!/bin/bash

set -e

source "$(dirname "$(readlink -e "$0")")/config"
source "$(dirname "$(readlink -e "$0")")/db-import-archlinuxarm.conf"

# Steps
# * Sync abs
# * Download blacklist.txt
# * Sync abslibre from abs excluding from blacklist
# * Create repo.abs.tar.gz tarballs

function sync_abs() {
	# sync from ${REPO}.abs.tar.gz files in ALARM mirrors
	local TMP_SUBDIR="${tmpdir}/abs-alarm/"
	rm -rf -- "$TMP_SUBDIR" "$ABS_ROOT"
	mkdir -- "$TMP_SUBDIR"
	for ARCH in armv7h; do
		for REPO in "${ARCHTAGS[@]%-*}"; do
			rsync ${SYNCARGS} \
			      rsync://${ABS_SERVER}/${ARCH}/${REPO}/${REPO}.abs.tar.gz \
			      "$TMP_SUBDIR" || return $?
			mkdir -p -- "${ABS_ROOT}/${ARCH}"
			bsdtar xf "${TMP_SUBDIR}/${REPO}.abs.tar.gz" \
			       -C "${ABS_ROOT}/${ARCH}"
		done
	done

	# add changes by ALARM since those aren't present in .abs.tar.gz files
	if ! git -C "$ALARM_ROOT" pull &>/dev/null; then
		rm -rf -- "$ALARM_ROOT"
		if ! git clone "$ALARM_GIT" "$ALARM_ROOT"; then
			printf "[FAILED]\n"
			return 1
		fi
	fi
	# FIXME: $ALARM_ROOT doesn't separate packages by architecture
	for ARCH in armv7h; do
		for REPO in "${ARCHTAGS[@]%-*}"; do
			rsync -mrtq --no-p --no-o --no-g --exclude='README' \
			      "${ALARM_ROOT}/${REPO}/" \
			      "${ABS_ROOT}/${ARCH}/${REPO}"
		done
	done

	# fix some permissions
	find "${ABS_ROOT}" -type d -print0 | xargs -0 chmod 755
	find "${ABS_ROOT}" -type f -print0 | xargs -0 chmod 644
}

function get_blacklist() {
	libreblacklist update
	if ! libreblacklist cat | libreblacklist get-pkg | sort -u | sed "s/^/**\//" > ${BLFILE}; then
		printf "[FAILED]\n"
		return 1
	fi

	# Prevent using an empty blacklist
	[ $(wc -l ${BLFILE} | cut -d " " -f1) -eq 0 ] && return 1

	printf "[OK]\n"
}

function sync_abs_libre() {

	# Clone ABSLibre git repo
	rm -rf -- "$tmpdir/abslibre"
	git clone "$ABSLIBRE_GIT" "$tmpdir/abslibre"

	# Sync from ABS and then sync from ABSLibre
	printf ":: Syncing ABSLibre...\t"
	if ! rsync ${SYNCARGS} --delete-excluded --exclude-from=${BLFILE} ${ABS_ROOT} ${ABSLIBRE_ROOT}; then
		printf "[FAILED]\n"
		return 1
	fi
	for ARCH in armv7h; do
		if ! rsync -v -mrtq --no-motd --no-p --no-o --no-g --quiet --exclude=.git/ "$tmpdir/abslibre/" ${ABSLIBRE_ROOT}/${ARCH}/; then
			printf "[FAILED]\n"
			return 1
		fi
	done

	# fix some permissions
	find "${ABSLIBRE_ROOT}" -type d -print0 | xargs -0 chmod 755
	find "${ABSLIBRE_ROOT}" -type f -print0 | xargs -0 chmod 644

	printf "[OK]\n"
}

# Create .abs.tar.gz tarballs
create_tarballs() {
	for repo in ${ABSLIBRE_ROOT}/armv7h/*; do
		baserepo=${repo##*/}
		arch=$(basename $(dirname $repo))

		# Remove the old one
		mkdir -p $FTP_BASE/$baserepo/os/$arch/
		rm -fv $FTP_BASE/$baserepo/os/$arch/$baserepo.abs.tar.gz
		# Create a new one joining arch and any
		# Remove the first part of the path (it could be $repo but any isn't hit)
		include=($repo/*)
		if [[ -d ${ABSLIBRE_ROOT}/any/${baserepo}/ ]]; then
			include+=(${ABSLIBRE_ROOT}/any/${baserepo}/*)
		fi
		bsdtar -czf $FTP_BASE/$baserepo/os/$arch/$baserepo.abs.tar.gz \
			-s ":${ABSLIBRE_ROOT}/[a-z0-9_]\+/[a-z]\+::" \
			"${include[@]}"
	done
}

main() {
	trap 'rm -rf -- "$tmpdir"' EXIT
	tmpdir=$(mktemp --tmpdir -d "${0##*/}.XXXXXXXXXX")

	BLFILE=${tmpdir}/blacklist.txt
	mkdir -p -- "$ABSLIBRE_ROOT" "$ABS_ROOT" "$ALARM_ROOT"

	sync_abs
	get_blacklist
	sync_abs_libre
	create_tarballs
}

main "$@"