#!/bin/sh
# Joins two map spreadsheets A->B0 and B0->B1 to A->B1, B1 a modification of B0
selfDir="$(dirname -- "$0")"
test "$#" -eq 2 || { echo "Usage: $0 map_0 map_1 >joined_map" >&2; exit 2;}
"$selfDir/join" <"$1" "$2"|"$selfDir/union" "$1"