bug#50667: Update ecomplete when used via standard UI

[Augusto Stoffel]

On Sat, 18 Sep 2021 at 23:06, Lars Ingebrigtsen <larsi@gnus.org> wrote:

> Augusto Stoffel <arstoffel@gmail.com> writes:
>
>> If one keeps sets
>>
>>     (setq message-mail-alias-type nil ;; or keep the default 'abbrev
>>           message-expand-name-standard-ui t)
>>
>> and an ecomplete database file, then everything works OOTB,
>
> Works in what way?

If I hit TAB in an address field, my completion UI kicks in and I can
choose an address from the ecomplete database.

>
>> except that the ecomplete database doesn't get updated with new
>> addresses.
>>
>> Is the following change a reasonable fix for this?
>
> [...]
>
>> -      (when (and (message-mail-alias-type-p 'ecomplete)
>> +      (when (and (bound-and-true-p ecomplete-database)
>
> I think this would be highly surprising behaviour -- just loading a
> library shouldn't have such side effects.

Loading ecomplete doesn't populate 'ecomplete-database'.  But if you set
'message-expand-name-standard-ui' to t, then 'ecomplete-start' will be
called when request completions.

>
> What's your use case here?  You don't want to use ecomplete for alias
> expansions, but you still want to update the ecomplete database?

I want to use ecomplete via completion at point instead of ecomplete's
electric UI.  This is what the variable
'message-expand-name-standard-ui' is meant for, right?