#!/bin/sh
rev=($(git-rev-parse --revs-only "$@"))
flags=($(git-rev-parse --no-revs --flags "$@"))
files=($(git-rev-parse --no-revs --no-flags "$@"))
case "${#rev[*]}" in
0)
        git-diff-files -M -p "$@";;
1)
        git-diff-cache -M -p "$@";;
2)
        begin=$(echo "${rev[1]}" | tr -d '^')
        end="${rev[0]}"
        git-diff-tree -M -p $flags $begin $end $files;;
*)
        echo "I don't understand"
        exit 1;;
esac