#!/bin/sh -e
#
# subst-configvars - Build-time script used to substitute configuration
#                    variables in files without keeping inter-references
#                    like exec_prefix=${prefix}.
#
# Use in Makefile rules like this:
#
# file : file.in
#       sh $(top_srcdir)/all/script/subst-configvars $< > $@
#
# Used in all/lib/config-spec/Makefile.am , to generate lire.xml from
#  lire.xml.in .
#
# Copyright (C) 2003 Stichting LogReport Foundation LogReport@LogReport.org
# $Id: subst-configvars.in,v 1.5 2006/07/23 13:16:33 vanbaal Exp $
#
# This program is part of Lire.
#
# Lire is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program (see COPYING); if not, check with
# http://www.gnu.org/copyleft/gpl.html.

if test $# -ne 1
then
    echo "Usage: subs-configvars file.in > file" >&2
    exit 1
fi

dir=`dirname $0`
substfile=$dir/configvars

. $substfile

{ for v in `cut -d= -f 1 $substfile`
  do
    echo $v=`eval echo '$'$v`
  done
} | @PERL@ -e '
my %subst = ();
while ( <STDIN> ) {
   chomp;
   next unless /^(\w+)=(.*)/;
   $subst{$1} = $2;
}

# Substitute the @VAR@ in the file
open FILE, $ARGV[1] or die "open of $ARGV[1] failed: $!\n";
while ( <FILE> ) {
    s/\@(\w+)\@/$subst{$1}/eg;
    print;
}
' $substfile $1