#!/bin/bash
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# vim: set sw=4 expandtab:
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Copyright (C) 2016 Jérôme Pouiller <jezz@sysmic.org>
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#
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DATE_BIN=false
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# Do not call `date' directly since it will produce an infinite recursion.
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# Instead, find path of true `date' binary.
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for P in `echo $PATH | tr ':' ' '`; do
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if [ -x "$P/date" ]; then
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if ! [ "$P/date" -ef "$0" ]; then
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DATE_BIN="$P/date"
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break;
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fi
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fi
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done
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if [ -n "$SOURCE_DATE_EPOCH" ]; then
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FORCE_EPOCH=1
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for i in "$@"; do
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# Use of --date, --file and --reference (and their short option counter
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# parts) is incompatible with SOURCE_DATE_EPOCH.
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# -u and -R are the only short options without argument. So they could
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# appear between '-' and option we want to match.
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if echo "$i" | grep -qE '^-([uR]*d|-date|[uR]*f|-file|[uR]*r|--reference)'; then
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FORCE_EPOCH=0
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break;
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fi
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done
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if [ $FORCE_EPOCH -eq 1 ]; then
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echo "date: Warning: using \$SOURCE_DATE_EPOCH instead of true time" >&2
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ARGS="-d @$SOURCE_DATE_EPOCH"
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fi
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fi
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exec $DATE_BIN $ARGS "$@"
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