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#! /bin/sh
: ${YEAR_FILE:=$1}
: ${DEFAULT_YEAR:=$2}
year=
[ -n "${YEAR_FILE}" ] || {
echo >&2 "$0 $(dirname "$0")/.year [DEFAULT_YEAR]"
exit 1
}
[ -f "${YEAR_FILE}" ] && year="$(cat "${YEAR_FILE}")"
[ -n "${year}" ] ||
year="$(git show --format=format:%cd --no-patch --date=format:%Y)"
[ -n "${year}" ] || year="${DEFAULT_YEAR}"
[ -n "${year}" ] || year="$(date "+%Y")"
[ -n "${year}" ] || {
echo >&2 'Undefined year.'
exit 1
}
printf "%s" "${year}"
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