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#!/bin/bash
set -eux
BASE_DIR="$1"
VERSIONS=$(find "${BASE_DIR}" -mindepth 1 -maxdepth 1 -type d | sort -V)
LATEST_SERIAL="$(basename "$(echo "${VERSIONS}" | tail -n1)")"
echo "Latest serial is ${LATEST_SERIAL}; updating current symlink..."
rm -f "${BASE_DIR}/current"
(cd "${BASE_DIR}" && ln -s "${LATEST_SERIAL}" "current")
OLD_VERSIONS=$(echo "${VERSIONS}" | head -n-5)
if [[ ! -z ${OLD_VERSIONS} ]]; then
echo "Cleaning up old versions:"
echo "${OLD_VERSIONS}"
echo "${OLD_VERSIONS}" | xargs rm -rf
fi
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