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#!/bin/sh

lockfile=/var/run/aports-build/aports-build.pid
pid=$(cat $lockfile 2>/dev/null)

if [ -n "$pid" ]; then
	if [ -d /proc/"$pid" ]; then
		# already running
		exit 0
	fi
fi
echo $$ > $lockfile || exit 1

logurl=
conf=/etc/conf.d/aports-build
. $conf || exit 1

if [ -z "$git_branch" ]; then
	echo "Please set 'git_branch' in $conf" >&2
	exit 1
fi

rel=$upload_release

if [ -z "$rel" ]; then
	case "$git_branch" in
		master)		rel="edge";;
		[0-9]*-stable)	rel=v${git_branch%-stable} ;;
	esac
fi

arch=x86
case "$(uname -m)" in
	x86_64) arch=x86_64;;
esac

aports=${APORTS:-$HOME/aports}
isodir=$HOME/alpine-iso
packages=${REPOSDIR:-$HOME/packages}
repos=${REPOS:-"main testing"}

: ${upload_host:="rsync.alpinelinux.org"}
: ${upload_prefix:="$upload_host:alpine"}
upload_pkg="$upload_prefix/$rel/"
upload_iso="$upload_prefix/$rel/releases/$arch/"

: ${ircchannel:="#alpine-devel"}
: ${hostname:=$(hostname)}
: ${mqtt_broker:="msg.alpinelinux.org"}
: ${status_msg:="mosquitto_pub -h $mqtt_broker -t build/$hostname -r -m"}
: ${upload_msg:="mosquitto_pub -h $mqtt_broker -t rsync/$upload_host/$rel/$arch -m"}
: ${irc_msg:="mosquitto_pub -h $mqtt_broker -t irc/${ircchannel//#/%} -m"}
: ${logdir:="/var/cache/distfiles/buildlogs"}
: ${logurlprefix:="http://bld1.alpinelinux.org/buildlogs"}

export ABUILD_LOG_CMD="$status_msg"
log() {
	echo "$hostname: $@"
	$status_msg "$1"
}

send_irc() {
	#echo "$1" | sircbot-send "$ircchannel"
	$irc_msg "$hostname: $1"
}

# create new_release
new_release() {
	local new=$1
	local target="all-release"
	if [ "$rel" = "edge" ]; then
		target="edge"
	fi
	cd "$isodir"
	echo "$new" > current
	rm -rf isotmp.*
	sudo apk add --virtual .alpine-release xdelta3 lua
	if ! make $target; then
		rm current
		return 1
	fi
	sh mklatest.sh || return 1
	mkdir -p "$upload_iso"
	rsync -ruv .latest.txt *"$new"* "$upload_iso" || return 1
	sudo apk del .alpine-release
	mv current previous
	return 0
}

cd $aports || return 1
[ -z "$repos" ] && return 1

# parse opts
while getopts "fu:" opt; do
	case $opt in
	'f') force=true;;
	'u') logurl=" $OPTARG";;
	esac
done
shift $(( $OPTIND - 1 ))

while true; do
	cd $aports || return 1
	# check if we need to rebuild
	log "pulling git"
	_old=$(git describe)
	_old_tag=$(git describe --abbrev=0)
	git checkout $git_branch
	git pull || return 1
	_current=$(git describe)
	_current_tag=$(git describe --abbrev=0)
	if [ "$_old_tag" != "$_current_tag" ]; then
		log "$_old_tag -> $_current_tag"
	fi
	if [ "$_old" = "$_current" ] && [ -f /tmp/uploaded ] && [ -z "$force" ] && [ "$_current_tag" = "$_old_tag" ]; then
		break
	fi

	force=

	# check if we need make new release
	if [ "$_current_tag" != "$_old_tag" ]; then
		_new_release=1
		# we want build the realease from this tag
		git checkout "$_current_tag"
		_current=$(git describe)
	fi

	rm -f /tmp/uploaded

	# do the compile, send output to log
	log "building $_current"
#	# temp workaround - abuild does not resolve the linux kernel dep
#	(
#		cd $HOME/aports/main
#		for i in linux-*; do
#			(
#			export REPODEST=$HOME/packages
#			cd $i && abuild -Rk )||break
#		done
#	)
	if ! buildrepo -p $buildrepo_opts $repos >"$logdir"/$hostname.log 2>&1 ; then
		local errlog=$hostname.$_current.log
		cp "$logdir"/$hostname.log "$logdir"/$errlog
		# todo: revert last commit?
		send_irc "failed to build $_current: $logurlprefix/$errlog"
		exit 1
	fi

	# upgrade our running system
	log "upgrading system"
	sudo apk upgrade -U -a --quiet || log 'failed to apk upgrade'

	# copy for distribution
	cd "$packages" || return 1
	if [ -z "$upload_pkg" ]; then
		break
	fi
	log "uploading packages"
	rc=0
	for i in $upload_pkg; do
		local repo
		for repo in $repos; do
			rsync -ruv --delete-delay --delay-updates $repo/$arch $i/$repo/
			rc=$(( $rc + $? ))
		done
	done
	[ $rc -eq 0 ] && touch /tmp/uploaded && sudo apk update

	# report to irc that we are done
	send_irc "files from $_current uploaded"

	# if
	if [ "$_current_tag" != "$_old_tag" ]; then
		if new_release ${_current_tag#v}; then
			send_irc "release $_current_tag uploaded"
		fi
	fi

	# notify mirrors that they can upload now if they want
	$upload_msg "$_current"
done

# cleanup
log "idle"
rm -f $lockfile