'--index!' => \$index,
);
GetOptions(%opts) or die "bad command-line args\n$usage";
-my $old_dir = shift or die $usage;
-my $new_dir = shift or die $usage;
+my $old_dir = shift(@ARGV) or die $usage;
+my $new_dir = shift(@ARGV) or die $usage;
die "$new_dir exists\n" if -d $new_dir;
die "$old_dir not a directory\n" unless -d $old_dir;
my $config = eval { PublicInbox::Config->new };