granicus.if.org Git - strace/blob - copyright-year-gen

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2017-2018 The strace developers.
   4 # All rights reserved.
   5 #
   6 # SPDX-License-Identifier: LGPL-2.1-or-later
   7
   8 : ${YEAR_FILE:=$1}
   9 : ${DEFAULT_YEAR:=$2}
  10 LC_TIME=C; export LC_TIME
  11
  12 year=
  13
  14 [ -n "${YEAR_FILE}" ] || {
  15         echo >&2 "$0 $(dirname "$0")/.year [DEFAULT_YEAR]"
  16         exit 1
  17 }
  18
  19 [ -f "${YEAR_FILE}" ] && year="$(cat "${YEAR_FILE}")"
  20
  21 [ -n "${year}" ] ||
  22         year="$(date -u +%Y -d "$(git show -s --format=format:%cD)")"
  23
  24 [ -n "${year}" ] ||
  25         year="${DEFAULT_YEAR}"
  26
  27 [ -n "${year}" ] ||
  28         [ -z "${SOURCE_DATE_EPOCH-}" ] ||
  29         year="$(date -u +%Y -d "@${SOURCE_DATE_EPOCH}")"
  30
  31 [ -n "${year}" ] ||
  32         year="$(date -u +%Y)"
  33
  34 [ -n "${year}" ] || {
  35         printf >&2 "%s: Undefined year.\n" "$0"
  36         exit 1
  37 }
  38
  39 printf "%s" "${year}"