#!/bin/sh
diff -uNr $1 $2 | awk 'm = /^(---|\+\+\+)/ {
    cmd = "shasum -a 512 \"" $2 "\" 2>/dev/null  ";
    s = cmd | getline x;
    close(cmd);
    if (s) {
        split(x, a, " ");
        o = a[1];
    } else {
        o = "false";
    }
    print $1 " " $2 " " o;
}
!m {
    print $0;
}'