#!/bin/sh
#
# Generate a unified diff between two specified revisions in a
# Perforce repository
# 

if [ $# -lt 3 ] ; then
     echo "usage: $0 DEPOT-SPEC REV1 REV2"
     echo "OR   : $0 DEPOT-SPEC REV1 DEPOT-SPEC REV2"
     exit 1
fi   

if [ $# -eq 3 ] ; then
   depot1=$1
   depot2=$1
   rev1=$2
   rev2=$3
elif [ $# -eq 4 ] ; then
   depot1=$1
   rev1=$2
   depot2=$3
   rev2=$4
fi

p4 diff2 -u ${depot1}...@${rev1} ${depot2}...@${rev2} | \
    sed 's@//depot/@E:/Source/@g' | \
    sed '/^+++\|---/s@/@\\@g'