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#!/bin/sh
#
# Update the date in the version file (version.c). If the existing
# date is todays date, a .number is apprended (or incremented) to
# make them distinct.
#
# pattern that matches the date in the version string in version.c
# \1 is preamble, \2 is the date, \3 is postamble (use ? pattern delimiters).
DATEPAT='\(@(#).* \)\([0-9]*/[0-9]*/[.0-9]*\)\(.*\)'
vfile=version.c
vfiles="version.c tests/version.t"
odatev=`sed -n "s?$DATEPAT?\2?p" < $vfile`
odate=`echo "$odatev" | sed 's?\..*??'`
ov=`echo "$odatev" | sed 's?[^.]*\.*??'`
date=`date '+%y/%m/%d' 2> /dev/null`
case "$date" in
[0-9]*/[0-9]*/[0-9]*) ;;
*)
# old system - try to compensate...
date=`date | awk 'BEGIN {
months["Jan"] = 1; months["Feb"] = 2; months["Mar"] = 3;
months["Apr"] = 4; months["May"] = 5; months["Jun"] = 6;
months["Jul"] = 7; months["Aug"] = 8; months["Sep"] = 9;
months["Oct"] = 10; months["Nov"] = 11; months["Dec"] = 12;
} {
if (months[$2])
mon = sprintf("%02d", months[$2]);
else
mon = $2;
printf "%02d/%s/%02d\n", $6 % 100, mon, $3;
}'`
esac
if test x"$odate" = x"$date"; then
v=".$ov"
if test -z "$ov" ; then
v=1
else
v=`expr $ov + 1`
fi
date="$date.$v"
fi
for i in $vfiles; do
bfile=$i.bak
tfile=$i.new
# try to save permissions/ownership/group
cp -p $i $tfile 2> /dev/null
if sed "s?$DATEPAT?\1$date\3?" < $i > $tfile; then
if cmp -s $i $tfile; then
echo "$i not changed, not updating"
rm -f $tfile
else
rm -f $bfile
ln $i $bfile || exit 1
mv $tfile $i || exit 1
fi
else
echo "$0: error creating new $i" 1>&2
exit 1
fi
done
exit 0
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