bug#46859: 28.0.50; [PATCH]: Add option to truncate long lines in xref.el

[Gregory Heytings]

> > I don't know what you exactly need (I don't (yet?) use project), so I 
> > can't elaborate further or provide benchmarks alas.
>
> The same code is also used in the default implementation of 
> xref-find-references, in case you ever tried it.
>
> > Could you perhaps tell me what you need?
>
> We are discussing changes to xref.el, because project-find-regexp 
> delegates a lot of its logic to it.
>
> Check out xref-matches-in-files and xref--convert-hits which it calls at 
> the end.

Okay, thanks, what you need is clearer to me, I'll have a look.

> What you're thinking of seems to require a Grep-specific version of 
> xref--convert-hits logic, which in the end constructs specialized xref 
> items with a new type of location (alternative to xref-file-location).

Yes, that's what I'm thinking of indeed, but it's not specific to "grep" 
because it would work the same way with ripgrep, ag and ack.  But indeed 
it's specific to grep-like tools.