my $output = '';
my %translations;
my %scrubbed;
for my $line (split(//m, $file, -1)) {
   if (
      my ($pre, $real_dev, $name, $post) =
         $line =~ /^ ( \s+ description \s ) (\w\w\w\w(-\w+-\w+)) ( ; .* ) /xs) {
   ) {
      my $scrubbed_dev = $translation{$real_dev};
      if (!$scrubbed_dev) {
         # Make sure not to duplicate anything in %scrubbed.
         $scrubbed_dev = ...;

         ++$scrubbed{$scrubbed_dev};
         $translation{$real_dev} = $scrubbed_dev;
      }

      $output .= $pre . $scrubbed_dev . $post;
   } else {
      $output .= $line;
   }
}