gentoo-auto-update/check_updates.sh

#!/bin/sh

PATH="$PATH:/usr/sbin:/sbin"

TMP_FILE=$(mktemp)
MAIL=$(mktemp)

# Possible race condition: if someone runs `eix blah` at the exact same time,
# it will block the update. But that seems highly improbable.
# The mail goal is to avoid stacking updates or eix-sync/eix-updates
PORTAGE_RUNING=$(pgrep 'emerge|eix')
if [ "${PORTAGE_RUNING}" ]; then
       echo "Error: another emerge is already running, exiting"
       exit 1
fi

PORTAGE_QUIET='1'

eix-sync 1>/dev/null 2>${TMP_FILE} || eix-update 1>/dev/null 2>${TMP_FILE}

emerge -v --update --newuse --deep --with-bdeps=y --quiet-build=y @security \
	&>> ${TMP_FILE}
emerge -v --update --newuse --deep --with-bdeps=y --quiet-build=y @system \
	&>> ${TMP_FILE}
emerge -v --update --newuse --deep --with-bdeps=y --quiet-build=y @unavailable
	&>> ${TMP_FILE}
emerge -v --update --newuse --deep --with-bdeps=y --quiet-build=y @world \
	&>> ${TMP_FILE}

if [ "$(grep '\[ebuild     U' ${TMP_FILE})" != '' ]; then
	echo "From: $(whoami)@$(hostname -f)" > ${MAIL}
	echo "To: root@$(hostname -f)" >> ${MAIL}
	echo "Subject: $(hostname -f):$(grep Total: ${TMP_FILE} \
		| cut -d ':' -f 2 | cut -d ')' -f 1))" >> ${MAIL}
	echo "Content-Type: text/plain; charset=UTF-8" >> ${MAIL}
	echo "Date: $(date --rfc-email)" >> ${MAIL}
	printf "\n" >> ${MAIL}
	cat ${TMP_FILE} >> ${MAIL}

	if [ "$(lsof -n | awk '{ if ($6 == "DEL") print $9 }' | sort -u)" ]; then
		restart-services --no-color >> ${MAIL}
	fi

	if ! [ -z "$(grep -v '{}' /var/lib/portage/preserved_libs_registry)" ]; then
		emerge -v --quiet-build=y @preserved-rebuild >> ${MAIL}
	fi

	emerge -p --depclean --with-bdeps\=y >> ${MAIL}

	eix-test-obsolete \
		| grep -Pv '^No|^Skipping|[Aa]ll.*packages are in the database' \
		>> ${MAIL}

	cat ${MAIL} | sendmail -t root@$(hostname -f)
fi

rm ${TMP_FILE} ${MAIL}