cache

#!/bin/sh

set -e

cd "$(dirname "${0}")"

dest=./.cache
mkdir -pv "${dest}"

usage() {
    echo "Usage: $(basename "${0}") host backup|restore [app]" >&2
    exit 1
}

host="${1}"
action="${2}"
[ -z "${host}" ] || [ -z "${action}" ] && usage

[ "$(id -u)" -ne "0" ] && exec sudo -E "${0}" "${@}"

shift 2

app="**"
if [ -n "${1}" ] && {
    [ -d "apps/${1}" ] || [ -d "${dest}/${host}/${1}" ]
}; then
    app="${1}"
    shift
fi

run_rsync() {
    rsync -avHSPm --numeric-ids \
        --include="${app}"'/data/**' --include='*/' --exclude='*' "${@}"
}

set -x

case "${action}" in
    backup)
        run_rsync "root@${host}:/opt/deploy/apps/" "${dest}/${host}/" "${@}"
        ;;
    restore)
        run_rsync "${dest}/${host}/" "root@${host}:/opt/deploy/apps/" "${@}"
        ;;
    *)
        usage
        ;;
esac