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#!/usr/bin/env bash
#
# made by Dennis Eriksen <dnns.no> in 2019. Gitified in 2020.
# Exit on error. Append "|| true" if you expect an error.
set -o errexit
# Exit on error inside any functions or subshells.
set -o errtrace
# Do not allow use of undefined vars. Use ${VAR:-} to use an undefined VAR
set -o nounset
# Catch the error in case mysqldump fails (but gzip succeeds) in `mysqldump |gzip`
set -o pipefail
function die {
echo $@
exit 1
}
function main {
# Check if $1 exists
[[ "${1:-}" == "" ]] && die "You need to set the name of the machine you want to rebuild."
local NAME=${1}
# Check if mkosi-template exists, and cd into it if it does
[[ -d /srv/mkosi/${NAME} ]] || die "/srv/mkosi/${NAME} does not exist"
cd /srv/mkosi/"${NAME}"
mkosi -o "/var/lib/machines/${NAME}.new"
# Stop machine if it is running
if machinectl status "${NAME}" >/dev/null; then
machinectl stop "${NAME}"
fi
cd /var/lib/machines
if [[ -e "${NAME}" ]]; then
mv "${NAME}" .backup/
rm -f "${NAME}.nspawn"
fi
mv "${NAME}.new" "${NAME}"
mv "${NAME}.new.nspawn" "${NAME}.nspawn"
echo "Done building."
echo ""
sleep 1
echo "Starting"
machinectl start "${NAME}"
sleep 2
machinectl
if [[ -e ".backup/${NAME}" ]]; then
echo ""
echo "Now zipping up the old machine, for backup"
cd .backup
tar c "${NAME}" | xz -0 - > "/var/lib/machines/.backup/${NAME}.tar.xz.$(date +%Y%m%d%H%M%S)"
rm -r "${NAME}"
cd ..
fi
}
main $@
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