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#!/bin/bash
exitstatus="0"
# put the files given on the command line into a tarball with the same name as the first file in that list. that first file gets overwritten.
files=$*
tmpdir=`mktemp -q -d /tmp/lw-tar.XXXXXX `
# -q is quiet and -d is --directory.
# short options are used here for portability purposes on systems that don't
# see the benefit of the explanatory power of long options.
file=`basename $1`
if [ "x$tmpdir" != "x" ]; then
cp $files $tmpdir
tarball=$file.tar
origdir=`pwd`
cd $tmpdir
tmpfiles=""
for f in $files; do
tmpfiles="$tmpfiles `basename $f`"
done
#we want to use --clamp-mtime but it is too new. (requires GNU tar version 1.29)
#we want to use --sort=name but it is too new.
tar -cvf $tarball $tmpfiles --mtime="@${SOURCE_DATE_EPOCH:-$(date +%s)}" --mode=go=rX,u+rw,a-s --owner=root --group=root --numeric-owner
if [ "$?" != "0" ]; then
exitstatus="1";
fi
cd $origdir
cp -f $tmpdir/$tarball $1
rm -f $tmpdir/*
rmdir $tmpdir
fi
exit $exitstatus
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