Need help with syntax highlighting within cgit

[ron.savage]

Hi Folks I'm trying to implement Perl syntax highlighting within cgit, after reading this fascinating post: http://www.cantrell.org.uk/david/journal/index.pl/id_cgit-syntax-highlighting. But the highlighter is not being called. Code is displayed as plain text, without e.g. line numbers. He's my cgitrc:

virtual-root=/cgit
cache-root=/tmp/cgit/cache

cache-size=1021
snapshots=tar.gz tar.bz zip
enable-log-filecount=1
enable-log-linecount=1
summary-log=5
summary-branches=5
summary-tags=5

css=/cgit/cgit.css
logo=/cgit/cgit.png
max-repo-count=100
source-filter=/home/ron/bin/perl.hiliter.pl

repo.url=Acute-ProcessPostScript
repo.path=/home/ron/perl.modules/Acute-ProcessPostScript/.git
repo.desc=Acute::ProcessPostScript

# All following lines are 3 per module, as above.

Here's the hiliter (perl.hiliter.pl):

#!/usr/bin/perl

use warnings;
use strict;

# ---------

my $file = shift;

if($file =~ /\.(p[ml]|t)$/i)
{
    system "/usr/local/bin/perltidy -html -st -ntoc -npod -pre -nssc -
+nnn"
}
else
{
    system "cat -n";
}

David's code has -nss but perltidy, v20090616 only has ssc, so I assume that's what he meant. This option has no effect on my lack of highlighting. perl.hiliter.pl is executable:

507 ron@zephyr:~/httpd/prefork$ dir /home/ron/bin/perl.hiliter.pl 
-rwxr-xr-x 1 ron ron 207 2009-10-15 09:36 /home/ron/bin/perl.hiliter.p
+l*

Changing it's permissions to 777 had no effect. I'm running cgit.cgi from Apache's cgi-bin/ dir. TIA. Ron