I am trying to set up a Trac instance as a complement to a Drupal site and would like to give users the possibility to use their Drupal account in Trac, too, ideally in a single sign-on fashion (if the user is already logged into Drupal, he is automatically logged into Trac).

The question now is how to accomplish this. I have found a plugin named DrupalIntegration which seems to implement that functionality; however, it is poorly documented - in fact, not documented at all. I managed to install it, but don't know how to configure it. Here is what I came up with from looking at the source code and the documentation of the AccountManager plugin (on which DrupalIntegration depends):

[components]
trac.web.auth.loginmodule = disabled
acct_mgr.api = enabled
acct_mgr.web_ui.LoginModule = enabled
acct_mgr.web_ui.RegistrationModule = disabled
TracDrupalIntegration.DrupalIntegration = enabled

[account-manager]
drupal_database = mysql://<usernam>:<password>@localhost/<db>
password_store = DrupalIntegration

(<username>, <password> and <db> are naturally substituted with the correct data). While the Trac log says:

2010-12-18 10:54:09,570 Trac[loader] DEBUG: Loading TracDrupalIntegration from /usr/lib/python2.5/site-packages/TracDrupalIntegration-0.1-py2.5.egg

this doesn't seem to work: trying to log in with a Drupal username / password results in an "Invalid username or password" error.

Has someone used the DrupalIntegration and can point out to me what I did wrong? Or is there any other approach you know (or even have used in the past) to integrate Drupal and Trac that way?