Only show repos in gitweb that user has access to via Gitolite

I have gitolite setup and working with SSH key based auth. I can control access to repos via the gitolite-admin.git repo and the conf file. All of this works great over SSH but I would like to use GitWeb as a quick way to view the repos.

GitWeb is working great now but shows all repositories via the web interface. So my goal here is to:

Authenticate users in apache2 via PAM, I already have the Ubuntu server authenticating aginst AD and all the users are available. This should not be an issue.
Use the user name logged in with the check gitolite permissions
Display apropriate REPOS in the web interface.

Does anyone have a starting point for this? The Apache part shouldn't be difficult, and I'll set it to auth all fo the /gitweb/ url. I dont know how to pass that username around and authorize it against gitolite. Any ideas?

Thanks,

Nathan

Solution

Yes, it is possible, but you need to complete the gitweb config scripts in order to call gitolite.

The key is in the gitweb_config.perl: if that file exists, gitweb will include and call it.
See my gitweb/gitweb_config.perl file:

our $home_link_str = "ITSVC projects";
our $site_name = "ITSVC Gitweb";
use lib (".");
require "gitweb.conf.pl";

In gitweb/gitweb.conf.pl (custom script), I define the official callback function called by gitweb: export_auth_hook: that function will call gitolite.

use Gitolite::Common;
use Gitolite::Conf::Load;
#$ENV{GL_USER} = $cgi->remote_user || "gitweb";

$export_auth_hook = sub {
  my $repo = shift;
  my $user = $ENV{GL_USER};
  # gitweb passes us the full repo path; so we strip the beginning
  # and the end, to get the repo name as it is specified in gitolite conf
  return unless $repo =~ s/^\Q$projectroot\E\/?(.+)\.git$/$1/;

  # check for (at least) "R" permission
  my $ret = &access( $repo, $user, 'R', 'any' );
  my $res = $ret !~ /DENIED/;

  return ($ret !~ /DENIED/);
};

From the comments:

GL_USER is set because of the line:

$ENV{GL_USER} = $cgi->remote_user || "gitweb";

$cgi->remote_user will pick the environment REMOTE_USER set by any Apache Auth module which has completed the authentication (like in this Apache configuration file).
You can print it with a 'die' line.

"Could not find Gitolite/Rc.pm" means the INC variable used by perl doesn't contain $ENV{GL_LIBDIR}; (set to ~/gitolite/lib or <any_place_where_gitolite_was_installed>/lib).
That is why there is a line in the same gitweb/gitweb.conf.pl file which adds that to INC:

unshift @INC, $ENV{GL_LIBDIR};
use lib $ENV{GL_LIBDIR};
use Gitolite::Rc;

Edit from Nat45928: in my case I needed to insert my home path into all the '@H@' entries. That solved all of my issues right away.