bug#21816: elisp-mode-tests fails on a case-preserving filesystem

[Stephen Leake]

Dmitry Gutov <dgutov@yandex.ru> writes:

> Why don't we canonicalize the file name somehow when an xref instance
> is created?

Yes; I have often thought Emacs needs a canonical file format. But first
we need a good definition for "canonical file name". The closest we have
now is "expand-file-name"; that does not fix case sensitivity.

I think a canonical name that includes case sensitivity would need a
rule like:

   If the file name identifies an existing file, convert the file name
   casing to match the actual file name casing. If not, no case
   conversion is done.

I'm not clear how to do the case conversion, but I bet Emacs does have
the right functions.

This does not handle comparing two file names for a not-yet-created file
that differ in case.

-- 
-- Stephe