Re: How to use project.el

[Dmitry Gutov]

On 23.11.2020 18:22, excalamus--- via Users list for the GNU Emacs text 
editor wrote:
> 21 nov. 2020 à 21:55 de dgutov@yandex.ru:
>
> >   For instance, if you are working on a Python project, shouldn't there be some 
> > file in the project root directory which will indicate which virtualenv to use?
> Maybe? I've never heard of such a file being used with the venv module or conda 
> environments.

OK, I'm not well-versed in Python ecosystem, but there is pyenv:

  https://github.com/pyenv/pyenv

which apparently supports reading the python version from a file called 
.python-version, and an Emacs package that provides some sort of 
integration with it:

  https://github.com/pythonic-emacs/pyenv-mode

But even if those packages don't work to your liking, or together with 
"conda" (whatever that is), I think the general idea could be 
implemented in Emacs Lisp: you call (project-root (project-current)) and 
see if there is a file with a predetermined name inside that root. That 
file could point to a specific virtualenv which you would then switch to.