winmerge script for msysGit

winmerge.sh

#!/bin/sh
# git config --global -e
# 
# [diff]
#         tool = winmerge
# [difftool "winmerge"]
#         cmd = winmerge.sh $LOCAL $REMOTE $BASE
# [difftool]
#         prompt = false
NULL="/dev/null"
if [ "$2" = "$NULL" ] ; then
    echo "removed: $3"
elif [ "$1" = "$NULL" ] ; then
    echo "added: $3"
else
    echo "changed: $3"
    "D:/Program Files/WinMerge/WinMergeU.exe" -e -ub -dl "Base:$1" -dr "Mine:$2" "$1" "$2"
fi