Re: Bug: Entries with diary-sexps in "scheduled" not exported properly to calendar file (.ics file)

[Wanrong Lin <wrglin@gmail.com>]

I just wrote a function to do it, and hope it can help other people with 
similar needs:

;; example: (dates-from-diary-sexp "2019-04-01" "2019-09-01" 
"(diary-float t 1 2)")
;; => ((8 12 2019) (7 8 2019) (6 10 2019) (5 13 2019) (4 8 2019))
(defun dates-from-diary-sexp (start end diary-sexp)
   "Given a start and ending date, returns all valid dates between them 
that satisfy diary-sexp"
   (let ((day-absolute (org-time-string-to-absolute start))
         (end-absolute (org-time-string-to-absolute end))
         (sexp (car (read-from-string diary-sexp)))
         (dates))
     (while (< day-absolute end-absolute)
       (let ((date (calendar-gregorian-from-absolute day-absolute))
             (entry nil))
         (when (eval sexp)
           (setf dates (cons date dates)))
         (incf day-absolute)))
     dates))

On 3/26/2019 5:01 PM, Thomas Plass wrote:
> Wanrong Lin wrote at 15:20 on March 26, 2019:
> :
> : As a work around, do you know if there is a way
> : to generate a series of dates / org entries from a diary-sexps? Thanks.
>
> Evaluating those sexp is done in diary-lib.  But it's no use simply
> supplying arguments to functions there as they require external setup,
> in particular variables such the current DATE (mon day year), itself
> coming from calendar.el.  However, it's exactly such dates that you
> are looking for in the first place.  I guess, in your example
> (diary-float t 1 2) you might have to loop through all the days of all
> months (calendar knows about those) to see whether your sexp evaluates
> to something useful.  But I haven't looked at that in detail.
>
> Thomas