#
# BEGIN COPYRIGHT BLOCK
# This Program 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; version 2 of the License.
# 
# 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; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 USA.
# 
# In addition, as a special exception, Red Hat, Inc. gives You the additional
# right to link the code of this Program with code not covered under the GNU
# General Public License ("Non-GPL Code") and to distribute linked combinations
# including the two, subject to the limitations in this paragraph. Non-GPL Code
# permitted under this exception must only link to the code of this Program
# through those well defined interfaces identified in the file named EXCEPTION
# found in the source code files (the "Approved Interfaces"). The files of
# Non-GPL Code may instantiate templates or use macros or inline functions from
# the Approved Interfaces without causing the resulting work to be covered by
# the GNU General Public License. Only Red Hat, Inc. may make changes or
# additions to the list of Approved Interfaces. You must obey the GNU General
# Public License in all respects for all of the Program code and other code used
# in conjunction with the Program except the Non-GPL Code covered by this
# exception. If you modify this file, you may extend this exception to your
# version of the file, but you are not obligated to do so. If you do not wish to
# provide this exception without modification, you must delete this exception
# statement from your version and license this file solely under the GPL without
# exception. 
# 
# 
# Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
# Copyright (C) 2005 Red Hat, Inc.
# All rights reserved.
# END COPYRIGHT BLOCK
#

# The first argument is the file to edit
# The remaining arguments are pairs of values: the first value of the pair is
# the token to look for, and the second is the value to replace it with e.g.
# if the input file foo contains
#    $NETSITE_ROOT/%%%PERL_RUNTIME%%% -w perlscript ...
# then running $(PERL) thisscript foo %%%PERL_RUNTIME%%% foo/bar/perl5 > output/foo
# will result in output/foo containing
#    NETSITE_ROOT/foo/bar/perl5 -w perlscript ...

($input, %tokens) = @ARGV;

if (! $input) {
	print STDERR "Usage: $ $0 <inputfilename> [token1 replace1] ... [tokenN replaceN]\n";
	exit 1;
}

open(INPUT, $input) or die "Error: could not open file $input: $!";

while (<INPUT>) {
	while (($key, $value) = each %tokens) {
		s/$key/$value/g;
	}
	print;
}

close INPUT;