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#!/bin/sh

test "$1" && extra="-$1"

svn_revision=`svn info 2> /dev/null | grep Revision | cut -d' ' -f2`
test $svn_revision || svn_revision=UNKNOWN

NEW_REVISION="#define VERSION \"dev-SVN-r${svn_revision}${extra}\""
OLD_REVISION=`cat version.h 2> /dev/null`

# Update version.h only on revision changes to avoid spurious rebuilds
if test "$NEW_REVISION" != "$OLD_REVISION"; then
    echo "$NEW_REVISION" > version.h
fi