Re: ELPA policy

[Dmitry Gutov]

On 11/10/2015 10:01 PM, Eli Zaretskii wrote:

> I think a point we should take from this is that the prerequisites (in
> this case, the said rewrite) should be in place _before_ we seriously
> consider such moves (pun intended ;-).

The only prerequisite is to have this functionality (which is fairly 
self-contained) in the core. It would benefit from a rewrite (and moving 
away from CEDET would encourage that), but as the first step, we can 
just copy it and do some renaming.

However, like mentioned in the "project.el semantics" thread:

  I'm seriously considering to get away from it and always use Grep,
  because the other tools, while they can be faster, they're also
  entirely opaque to the user, can have outdated databases, non-indexed
  relevant directories, unsupported languages, and so on.

So this feature, which xref is depending on for the default 
xref-find-references implementation, requires certain amount of 
hand-holding from the user. And I don't know how to approach documenting 
it, and otherwise make it apparent to the user.

So someone else should probably start on taking care of that. Otherwise, 
I'd rather fall back on Grep, until such point that Emacs starts to 
manage the Global/id-utils/CScope datbases for the user, and learns to 
make sure that the database is up-to-date.