= How to use Mailman as a source of authentication =

Kudos to Christopher Gabriel for his original idea:
http://www.cgabriel.org/2009/09/21/ldap-e-la-disperazione/

Mailman can be used as a source of authentication for Trac. This is super handy, as it allows to have a single signon between the two.

Here is how it works:

An Apache macro (please install mod_macro and mod_python, and add `www-data` to the group `list`)
{{{#!apache
<Macro PrivateProjectMailman $name $list>
        <Location /svn/$name>
                AuthName "$name"
                AuthType Basic
                PythonPath "sys.path+['/etc/apache2/']"
                PythonAuthenHandler mailauth
                PythonOption MailmanList $list
                AuthUserFile /dev/null
                AuthBasicAuthoritative Off
                require valid-user
        </Location>

        <Location "/$name">
                AuthName "$name"
                AuthType Basic
                PythonPath "sys.path+['/etc/apache2/']"
                PythonAuthenHandler mailauth
                PythonOption MailmanList $list
                AuthUserFile /dev/null
                AuthBasicAuthoritative Off
                require valid-user
        </Location>

</Macro>


<Macro PublicProjectMailman $name $list>
        <Location /svn/$name>
                <LimitExcept GET PROPFIND OPTIONS REPORT>
                AuthName "$name"
                AuthType Basic
                PythonPath "sys.path+['/etc/apache2/']"
                PythonAuthenHandler mailauth
                PythonOption MailmanList $list
                AuthUserFile /dev/null
                AuthBasicAuthoritative Off
                require valid-user
                </LimitExcept>
        </Location>

        <Location "/$name/login">
                AuthName "$name"
                AuthType Basic
                PythonPath "sys.path+['/etc/apache2/']"
                PythonAuthenHandler mailauth
                PythonOption MailmanList $list
                AuthUserFile /dev/null
                AuthBasicAuthoritative Off
                require valid-user
        </Location>

</Macro> 
}}}

Then, in the relative !VirtualHost
{{{#!apache
Use PrivateProjectMailman progetto-x lista-progetto-x
}}}
or
{{{#!apache
Use PublicProjectMailman progetto-x lista-progetto-x
}}}

And you are done.