bug#62621: 29.0.60; uniquify can't make buffers unique based on things other than filename

[Eli Zaretskii]

> From: sbaugh@catern.com
> Date: Fri, 14 Jul 2023 19:15:50 +0000 (UTC)
> Cc: Spencer Baugh <sbaugh@janestreet.com>, 62621@debbugs.gnu.org
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> I can't contrast that to "using symbols" because I just don't understand
> >> what you mean by "using symbols".
> >
> > It means the defcustom's value is a symbol, like 'numbered or
> > 'append-directory, not a function.
> 
> Yes.  But how would you implement it so that setting the defcustom to
> 'project causes the project-uniquify-dirname-transform logic to be used
> by uniquify.el, without mentioning project-uniquify-dirname-transform or
> other project functions in uniquify.el?

You can use autoloading, for example.  Or explicitly
(require 'project) when that value is seen.  Or any
number of other solutions we have for such situations.