#!/bin/bash -e
a="$1"
b="$2"
shift 2
tmpa="$a.txt"
tmpb="$b.txt"
a2b "$@" "$a" "$tmpa" || cp -i "$a" "$tmpa"
a2b "$@" "$b" "$tmpb" || cp -i "$b" "$tmpb"
vimdiff "$tmpa" "$tmpb"
rm "$tmpa" "$tmpb"
#exec vimdiff <(catdoc "$1") <(catdoc "$2")