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#! /bin/sh
# Copyright (C) 2012-2018 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# Usage: is_newest FILE FILES
# Fail if any file in FILES is newer than FILE, and print the list of
# such files on the standard error. Resolve ties in favor of FILE.
# NOTE: keep this file Bourne-compatible, for the sake of systems with
# non-POSIX /bin/sh (like Solaris).
set -u
me=is_newest
if test $# -lt 2; then
echo "$me: too few arguments" >&2
exit 2
fi
file=$1; shift
newer_files=`find "$@" -prune -newer "$file"` || exit $?
if test -n "$newer_files"; then
echo "$me: these files are newer than '$file':" >&2
for f in $newer_files; do echo "* $f" >&2; done
exit 1
fi
exit 0
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