Re: [PATCH] emacs: Add more front ends for address completion

[Utkarsh Singh <utkarsh190601@gmail.com>]

On 2022-03-15, 13:37 +0100, Alexander Adolf <alexander.adolf@condition-alpha.com> wrote:

> Utkarsh Singh <utkarsh190601@gmail.com> writes:
>
>> [...]     
>>>>      `post-completion': Called after a completion candidate has been inserted
>>>>      into the buffer.  The second argument is the candidate.  Can be used to
>>>>      modify it, e.g. to expand a snippet.
>>>> [...]
>>>
>>> Hm, that sounds like it would functionally be similar to specifying an
>>> :exit-function property in completion-extra-properties?
>>
>> Great!  We can definitely work with this.
>> [...]
>
> I'm glad to learn we might be heading in the same direction. AFAIR you
> spoke about removing company from notmuch-address.el altogether? That
> would be by impetus, too.
>
> EUDC [1], which is part of core Emacs, has just been given the ability
> to combine search results from several sources [2].
>
> [1] https://www.gnu.org/software/emacs/manual/html_mono/eudc.html
> [2]  https://github.com/emacs-mirror/emacs/commit/0470a4a939772c4bd25123b15f5eadab41f8bee5
>
> I have written experimental code to make EUDC contribute to
> completion-at-point, and to make notmuch-address contribute to EUDC
> search results. This works in principle, and I get combined search
> results from notmuch-address, and the macOS Contacts app in a corfu
> pop-over UI in header fields of message-mode. It seems you were looking
> for something similar?

Honestly, I didn't knew about EUDC, but it looks promising.

> With this kind of setup, the overall architecture for email address
> completion could be like this:
>
> notmuch-address  \          
>            BBDB  |          
>            LDAP   > --> EUDC --+
>  macOS Contacts  |             |
>             ...  /             V
>                                |
>       +----------<-------------+
>       |   
>       V                               /  completing-read
>       |                              |   corfu          
>       + --> completion-at-point --> <    company        
>                                      |   ...            
>                                       \
>
> This would remove any user interface related code from
> notmuch-address.el, an instead convert it into a back-end for EUDC.
>
> Looking forward to your thoughts,

Thank you for working on this issue.  But from now, its up to Notmuch
maintainers to decide whether or not they want any improvements in
`notmuch-address.el'.
-- 
Utkarsh Singh
https://utkarshsingh.xyz/