#!/bin/bash

[ "${FLOCKER}" != "$0" ] && exec env FLOCKER="$0" flock -en "$0" "$0" "$@" || :

logdir="/var/log"
sync_log="${logdir}/rsync.log"
up_log="${logdir}/emerge-updates.log"

GS_SYNC=true
GS_RSYNC=false
GS_EUPDATEDB=true
GS_FETCH=false
GS_UPWORLD=true
GS_LAYMAN=true
conf="/etc/gentoo-sync.conf"
[[ -e ${conf} ]] && . "${conf}"

export NOCOLOR=true

(
date

if ${GS_RSYNC} ; then
	# For slow systems, run rsync directly.
	for f in make.globals make.conf ; do
		for d in /etc /etc/portage /usr/share/portage/config ; do
			f="${d}/make.globals"
			[[ -e ${f} ]] && . ${f} && break
		done
	done
	> "${up_log}"
	: ${PORTAGE_RSYNC_OPTS:=-azO --delete --exclude=/distfiles --exclude=/local --exclude=/packages}
	: ${SYNC:=rsync://rsync.gentoo.org/gentoo-portage}
	: ${PORTDIR:=/usr/portage}
	exec rsync ${PORTAGE_RSYNC_OPTS} ${PORTAGE_RSYNC_EXTRA_OPTS} ${SYNC}/ ${PORTDIR}/ >& "${sync_log}"
fi

if ${GS_SYNC} ; then
	emerge --sync -q
	date
	${GS_EUPDATEDB} && $(type -P eupdatedb)
	date
	${GS_LAYMAN} && l=$(type -P layman) && ${l} -S -q
	date
	${GS_FETCH} && emerge world -Duf
	#q -qr
fi

date
) >& ${sync_log}

if ${GS_UPWORLD} ; then
	(
	eval $(portageq envvar -v PORTDIR)
	cd "${PORTDIR}"
	bad_pkgs=()
	good_pkgs=()
	for p in `qlist -ICS` ; do
		if [[ -d ${p%:*} ]] ; then
			good_pkgs+=( ${p} )
		else
			bad_pkgs+=( ${p} )
		fi
	done
	if [[ ${#bad_pkgs[@]} -gt 0 ]] ; then
		echo 'These packages no longer exist:'
		printf '\t%s\n' "${bad_pkgs[@]}"
		echo
	fi
	echo 'emerge -u1 --keep-going $(awk '\''$2 ~ /\// {print $2}'\'' '${up_log}')'
	emerge ${good_pkgs[*]} -upq --cols
	) >& ${up_log}
fi