From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Eglen <S.J.Eglen@damtp.cam.ac.uk>
Subject: Re: icalendar: exporting times of day specified in heading?
Date: Thu, 28 Jan 2010 15:22:41 +0000
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To: Carsten Dominik <carsten.dominik@gmail.com>
Cc: emacs-orgmode@gnu.org, Stephen Eglen <S.J.Eglen@damtp.cam.ac.uk>

Hi Carsten,

> Hi Stephen,
> 
> while it might be possible to do what you ask for, I think it is
> error- prone because people might accidently have something in the
> headline which looks like a time.  I don't mind so much if Org's
> agenda stumbles over this, but I don't want to produce incorrect
> icalendar files.
> 
> Also, this icalendar export function is programmed in a messy way, and
> I don't see a quick way to fix this.
> 
> If you can make me a patch, I will take it.

Thanks for this.  I did decide to bite the bullet and look into this.  I
think I have some working code, modifiying:
  org-agenda-add-entry-to-org-agenda-diary-file

so that it parses out the date at that point, conditional on
org-agenda-search-headline-for-time being t.  In this way, it doesn't
touch the ical export functions.

I will double check and submit a patch for consideration. 

A small note though: along the way, I've sometimes noticed that diary
entries   are included with a level 2 heading rather than a level 4
heading.  I haven't been able to track this down, its just noticeable
when I later browse agenda.org

*** 2010-02-02 Tuesday
**** 15:00-15:30 check me
     <2010-02-02 Tue>

i.e. that 2nd line is sometimes given two heaings, and is not within the
right level 3 heading.  Anything obvious I might want to look at when
debugging?

Stephen