Re: [PATCH 2/2] pretty: add '%aA' to show domain-part of email addresses

> Junio C Hamano <gitster@pobox.com> writes:
> 
> > Another line of thought is perhaps it is potentially useful to teach
> > the --format= machinery to be a bit more programmable, e.g. allowing
> > to compute a substring of an existing field %{%aE#*@} without having
> > to waste a letter each for the local part and domain part.  But as I
> > already said, we are now talking about "postprocessing", and adding
> > complexity to our codebase only to have incomplete flexibility may
> > not be worth it.  A more specific %(authoremail:localpart) and its
> > domain counterpart may be easier to explain and understand.
> >
> > In any case, it is a bit too late to say "let's not waste the
> > precious single letter namespace to add useless features", as we
> > have come way too far, so I do not mind too much using a currently
> > unused letter $X for yet another author and committer trait.
> 
> When I wrote the above, I somehow forgot the existing work in the
> ref-filter (aka "for-each-ref") placeholders, where we have support
> to a lot more flexible way to customize these things.

> For example, "%(authoremail:mailmap,localpart)" can be used to say,
> instead of wasting two letters 'l' and 'L' out of precious 52, that
> we want e-mail address honoring the mailmap, and take only the local
> part.  And the support for the host part of the address that this
> topic discussed should be implementable fairly easily (just adding
> EO_HOSTPART bit to the email_option structure would be sufficient)
> on the ref-filter side.
> 
> We saw efforts from time to time to give "log --pretty=format:" more
> of the good things from the "for-each-ref --format=" placeholders
> (and vice versa), and it may give us a good way forward.