#!/bin/sh
# svnrevision.sh - figure out SVN revision and update buildsvnrevision file, if needed
#
# Copyright (c) 2007, Felix L. Winkelmann
# Copyright (c) 2008-2009, The Chicken Team
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
# conditions are met:
#
#   Redistributions of source code must retain the above copyright notice, this list of conditions and the following
#     disclaimer. 
#   Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
#     disclaimer in the documentation and/or other materials provided with the distribution. 
#   Neither the name of the author nor the names of its contributors may be used to endorse or promote
#     products derived from this software without specific prior written permission. 
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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LANG="C"

if test -d ".svn" ;
then
    if test -x "`which svn`" ;
    then
        rev="`svn info | sed -n -e 's/Revision: \([0-9]*\)/\1/p'`"
    else
        rev="`cat .svn/entries | sed -n -e '4 s/^\([0-9]*\)$/\1/p'`"
    fi
else
    rev="0"
fi

if test -e "buildsvnrevision" ;
then
    if test "`cat buildsvnrevision`" \!= "${rev}" ;
    then
        echo "${rev}" > buildsvnrevision
    fi
else
    echo "${rev}" > buildsvnrevision
fi
