x-pdf-stack

#!/usr/bin/env perl

use strict;
use warnings;
use PDF::API2;

my $destination = shift @ARGV;
usage("Requires a destination file name") unless $destination;
usage("Requires at least two PDF files") if @ARGV < 2;

my $top = PDF::API2->open(shift @ARGV);
my $page = $top->openpage(1);
while (@ARGV) {
  my $next = PDF::API2->open(shift @ARGV);
  $top->importpage($next, 1, $page);
}
$top->saveas($destination);
$top->end;