File mttroot/mtt/bin/mtt_rename artifact f11f51dae2 part of check-in 2764ae05ff

#! /bin/sh

     ###################################### 
     ##### Model Transformation Tools #####
     ######################################

# Bourne shell script: mtt_rename

# P.J.Gawthrop Jan 1998
# Copyright (c) P.J.Gawthrop 1998

###############################################################
## Version control history
###############################################################
## $Id$
## $Log$
## Revision 1.6  2002/04/22 08:05:26  gawthrop
## New regexp.
##
## Revision 1.5  2000/12/27 13:11:42  peterg
## *** empty log message ***
##
## Revision 1.4  1998/08/15 13:50:22  peterg
## Doesn't zap preexisting files
##
## Revision 1.3  1998/08/14 15:37:38  peterg
## rename now copies - no delete
##
## Revision 1.2  1998/01/06 13:57:39  peterg
## Now removes old version after copying
##
# Revision 1.1  1998/01/06  13:48:23  peterg
# Initial revision
#
###############################################################

old_name=$1
new_name=$2
extension=$3

left='[^a-zA-Z]'
right=$left
if [ -f "$new_name$extension" ]; then
   echo  "$new_name$extension already exists -- no action taken"
   exit
fi
if ls $old_name$extension > /dev/null 2>&1 
    then
	echo Renaming $old_name$extension to $new_name$extension
	sed \
         -e "s/\($left\)$old_name\($right\)/\1$new_name\2/g" \
         -e "s/^$old_name\($right\)/$new_name\1/g" \
        <$old_name$extension >$new_name$extension
fi