On 02/10/2022 16:14, Ihor Radchenko wrote:
> Ihor Radchenko writes:
>> Max Nikulin writes:
>>
> The new version of the patch allows all but first function return nil.
> See the attached.
> 
> Let me know if there are any other objections.

Ihor, sorry that I left your earlier questions with no response. I hope, 
the attached diff may illustrate my ideas better. I have not tried to 
run it though, so it can be full of stupid mistakes. I suggest to ignore 
nil values completely, but maybe I missed some use case.

Actually I suspect the if the `org-attach-dir-from-id' function returned 
both first and existing directories, the code of callers would be clearer.