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annotate build-aux/get-source-mtime.sh @ 25054:6652d3823428 stable

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maint: Update copyright dates in all source files.
author John W. Eaton <jwe@octave.org>
date Fri, 30 Mar 2018 09:19:05 -0400
parents 194eb4bd202b
children 7b2312def76b
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1 #! /bin/sh
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2 #
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3 # Copyright (C) 2017-2018 Mike Miller
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4 #
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5 # This file is part of Octave.
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6 #
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7 # Octave is free software: you can redistribute it and/or modify it
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8 # under the terms of the GNU General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11 #
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12 # Octave is distributed in the hope that it will be useful, but
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13 # WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU General Public License for more details.
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16 #
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17 # You should have received a copy of the GNU General Public License
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18 # along with Octave; see the file COPYING. If not, see
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19 # <https://www.gnu.org/licenses/>.
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20
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21 # Generate a timestamp that best represents the last modification time
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22 # of this source tree. The time value is printed on stdout in units of
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23 # time_t. If a reasonable representation of the source tree last
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24 # modification time can't be determined, then the current system time is
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25 # printed instead. A valid time_t value is always printed on stdout.
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26
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27 set -e
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28
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29 PERL=${PERL:-perl}
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30 SED=${SED:-sed}
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31
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32 if [ $# -ne 1 ]; then
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33 echo "usage: get-source-mtime.sh SRCDIR" 1>&2
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34 exit 1
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35 fi
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36
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37 srcdir="$1"
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38
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39 if [ x"$SOURCE_DATE_EPOCH" != x ]; then
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40 # Allow the source modification time to be overridden by SOURCE_DATE_EPOCH
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41 t=$SOURCE_DATE_EPOCH
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42 elif [ -d $srcdir/.hg ]; then
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43 t=$( cd $srcdir && hg log --rev . --template '{date|hgdate}' )
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44 t=$( echo $t | $SED -n 's/^\([0-9]\+\) .*/\1/p' )
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45 elif [ -f $srcdir/HG-ID ]; then
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46 t=$( $PERL -e '@s = stat($ARGV[0]); print($s[9]) if @s;' $srcdir/HG-ID )
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47 elif [ -f $srcdir/configure ]; then
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48 t=$( $PERL -e '@s = stat($ARGV[0]); print($s[9]) if @s;' $srcdir/configure )
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49 fi
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50
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51 if [ x"$t" = x ]; then
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52 t=$( date +%s )
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53 fi
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54
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55 echo $t