Re: xref-collect-references picks wrong search backend

[Dmitry Gutov <dgutov@yandex.ru>]

On 09/10/2015 06:40 PM, Stephen Leake wrote:

> I have run Gnu Global on the Emacs root directory, mostly to find out if
> that's useful (so far not, because etags is better, but in other projects
> it could be useful).

Maybe you should run it in the src/ directory, not the top level one. 
This way, files outside of it won't try to use GNU Global.

> I'm actually using an experimental multi-language project setup that
> provides an xref-find-function that calls xref-collect-references
> directly for elisp searches, so I suggest the following solution:
>
> - Add an optional symref-tool arg to xref-collect-references; my
>    xref-find-function can set that to 'grep for elisp searches.

If you'll find that useful, sure.

But semantic-symref-find-references-by-name in the default 
implementation was just a way to get out something working quickly.

We might even have to bypass it altogether and always use Grep (in the 
default implementation), because any problems with semantic-symref (like 
GTAGS being out of date, or, like in this case, the tagging program 
skipping whole classes of files) are entirely opaque to the user.

 > elisp--xref-find-references could also set it to 'grep.

Since its definition is pretty much the same as the etags one, I was 
going to merge them and put in the new "default" backend.