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#!/bin/sh
#
# Copyright (c) 2017-2019 The strace developers.
# All rights reserved.
#
# SPDX-License-Identifier: LGPL-2.1-or-later
: ${YEAR_FILE:=$1}
: ${DEFAULT_YEAR:=$2}
LC_TIME=C; export LC_TIME
year=
[ -n "${YEAR_FILE}" ] || {
echo >&2 "$0 $(dirname "$0")/.year [DEFAULT_YEAR]"
exit 1
}
[ -f "${YEAR_FILE}" ] && year="$(cat "${YEAR_FILE}")"
[ -n "${year}" ] ||
year="$(date -u +%Y -d "$(git show -s --format=format:%cD)")"
[ -n "${year}" ] ||
year="${DEFAULT_YEAR}"
[ -n "${year}" ] ||
[ -z "${SOURCE_DATE_EPOCH-}" ] ||
year="$(date -u +%Y -d "@${SOURCE_DATE_EPOCH}")"
[ -n "${year}" ] ||
year="$(date -u +%Y)"
[ -n "${year}" ] || {
printf >&2 "%s: Undefined year.\n" "$0"
exit 1
}
printf "%s" "${year}"
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