#!/bin/sh

if [ "$1" == "" ]
then
    echo "Syntax:  $0 filename [version]"
    echo " diff between two versions of a file kept in pumpkin tftp server"
    echo " diff is between version and version-1.  If version not specified, most current is used."
    exit
fi

# compare the current version of the $1 file with the immediately previous one.  Does not work for file (1) and the original
# uses pumpkins file versioning. For instance:
# file (1)
# file (2)
# file (3)

# @@ fix this to match the location of your tftp folder
cd ~/PATH_TO_WHERE_THE_FILES_BE/

if [ "$2" == "" ]
then
  let new=`ls -lrt $1* | awk '{ f=$NF }; END{ print f }'|tr -d " " |tr -d "(" | tr -d ")"`
  echo "Current version is $new";
else
  let new=$2
fi
let old=$new-1;

diff $1\ \($new\) $1\ \($old\)