Re: Emacs integration for 'guix shell'

[Efraim Flashner]

On Wed, Sep 28, 2022 at 10:36:12AM +0300, Efraim Flashner wrote:
> On Mon, Sep 26, 2022 at 01:48:25PM -0400, Thompson, David wrote:
> > Hello all,
> > 
> > I recently wrote a little blog post titled "Guix for development" [0]
> > and in it I mentioned using a tool called direnv and emacs-direnv as a
> > way to integrate 'guix shell' with Emacs. This integration has vastly
> > improved my Emacs experience. I can open a shell buffer and the
> > environment variables are automatically configured the way I want. I
> > can run M-x compile and simply enter 'make' as the command instead of
> > 'guix shell -D -f guix.scm -- make'.
> > 
> > It's very cool that it works, and I should have done this years ago,
> > but direnv is an unnecessary middleman for me because I don't use it
> > for any other purpose.  It would be *even cooler* if Emacs could call
> > 'guix shell --search-paths' directly, parse the result, and update the
> > buffer environment.  Furthemore, it could integrate with project.el
> > (thus requiring Emacs 28) so that per-project search paths "just
> > work." The emacs-guix-shell [1] project attempts to do this.
> > 
> > I'm not an experienced elisp programmer so I'm sure there's stuff to
> > fix, and there are no customizable variables yet, but the essentials
> > seem to work OK for me.  If you'd like to try it out, eval
> > guix-shell.el and then M-x guix-shell-global-mode to enable it
> > everywhere, or M-x guix-shell-mode to enable it just for the current
> > buffer.
> > 
> > Whether through direnv or guix-shell.el, integrating Emacs with 'guix
> > shell' has been a game changer for my development workflow and I
> > highly recommend it!
> > 
> > That's all for now,
> > 
> > - Dave
> > 
> > [0] https://dthompson.us/guix-for-development.html
> > [1] https://git.dthompson.us/emacs-guix-shell.git/
> 
> You can add other things to your guix.scm file, allowing you to do More
> Things™ than just add packages to your environment.
> 
> I'm currently using Enlightenment, which has a 'PANTS=ON' environment
> variable for unknown reasons.
> 
> (ins)efraim@3900XT ~$ cat guix-shell.scm
> ;; This creates and empty guix environment, with
> ;; the PANTS environment variable set to OFF.
> 
> (setenv "PANTS" "OFF")
> (list )
> (ins)efraim@3900XT ~$ env | grep PANTS
> PANTS=ON
> (ins)efraim@3900XT ~$ guix shell -f guix-shell.scm
> guix shell: warning: no packages specified; creating an empty environment
> (ins)efraim@3900XT ~ [env]$ env | grep PANTS
> PANTS=ON
> 
> This doesn't directly help with your scenario, but you could change your
> 'make' invocation to `guix shell -D -f guix.scm -- sh -c 'source
> $GUIX_ENVIRONMENT/etc/profile; make'`, which would work as a workaround
> for now.

It would seem I was so certain it would work I didn't check before
pasting and sending.


-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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