Re: Eglot, project.el, and python virtual environments

[Dmitry Gutov <dgutov@yandex.ru>]

On 19.11.2022 03:56, João Távora wrote:
> I didn't even measure it because it never finished :-)

Too bad. On my machine in gecko-dev (200000 files)

   (project-files (project-current))

finishes in a little over 1 second with warm fs cache.

> I built
> a backend-style based completion table based on
> voidtools everything (https://www.voidtools.com/downloads/ 
> <https://www.voidtools.com/downloads/>)
> with regexp completion.  It's pretty fast.

That's Windows-only, right?

> I had hoped to plug it in project.el but I couldn't find a way, so
> I rebound C-x p f to it.

Should be easy enough: you create your own backend (rather than reusing 
'transient') and override the generic 'project-files'. Then add it to 
project-find-functions.

Not sure about regexp matching (maybe completion styles would help), and 
you'll need to figure out the "ignores" mechanism -- how you would 
specify them: just picking up from .gitignore, or having a buffer-local 
variable.

Anyway, this is the problem with the popular recommendation: just add a 
thing to 'project-find-functions'. It degrades performance and changes 
how project commands work too.

OTOH, the fact that many people seem to accept the consequences anyway 
is probably saying something as well.