I would like to be able to get my open tasks as
iCalendar compatible file, so it can be integrated in
the task list of iCalendar compatible applications
(like Evolution).

Thanks,
mueller@fsfeurope.org

Logged In: YES 
user_id=8719

this must be done by a special action handler in order to
return content of "text/calendar" type.  the handler in it's
.handle method should do something like this:

    self.client.header(
        {'Content-Type': 'text/calendar',
'Cache-Control':'no-cache'},
        response=200)

and then return rfc2445 content.

please see "Defining new web actions" in "Customising
Roundup" for details on action handlers.

by the way, i wonder how roundup classic schema may be
mapped to iCalendar objects?

Logged In: NO 

[richard here - back from pycon now] 
 
I was thinking the same thing, alex :) 
 

Logged In: YES 
user_id=8719

attached is example extension file that can be used to get
calendars from roundup.  it works with issue item or index
views like this:

http://localhost:8917/demo/issue1?@action=calendar
http://localhost:8917/demo/issue?@filter=status,assignedto&status=-1,1,2,3,4,5,6,7&assignedto=username_or_id&@action=calendar

tested with calendar extension for mozilla firefox.

Created wiki page at:

http://www.roundup-tracker.org/cgi-bin/moin.cgi/ExportiCalendarFile

that references the files on this issue.

AFAICT there is nothing more to do here.