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Re: Can I easily install GNU Emacs 27.1.50 via Guix?

From: zimoun
Subject: Re: Can I easily install GNU Emacs 27.1.50 via Guix?
Date: Fri, 18 Dec 2020 03:05:35 +0100


On Thu, 17 Dec 2020 at 19:54, Jorge P. de Morais Neto <> 

> * GTK+ search path
> When I launch Debian's Evince from Guix's emacs-maint, Evince cannot
> find my local printer.  Look at the messages when I open Evince in an
> Emacs shell and open Evince's print dialog:

Well, it seems expected, isn’t it?  Debian’s evince (/usr/bin/evince) is
built with a GTK and the Guix’s emacs with another.  Try:

  sudo apt install evince
  guix environment --pure --ad-hoc emacs
  emacs -q -f shell

and type “/usr/bin/evince”.  You should get an error:

--8<---------------cut here---------------start------------->8---
(evince:19226): GLib-GIO-ERROR **: 02:24:21.012: No GSettings schemas are 
installed on the system
Trace/breakpoint trap
--8<---------------cut here---------------end--------------->8---

Compare with:

  guix environment --pure --ad-hoc emacs evince
  emacs -q -f shell

and type “evince”.

Then I do not have any error when I open the print dialog; but I have no
setup for CUPS on my machine though.

> --8<---------------cut here---------------start------------->8---
> $ evince&
> [1] 22463
> jorge@jorge--inspiron-5570:~/unison/STJ/repos/usuários_arriscados_AD$ 
> (evince:22463): Gtk-WARNING **: 19:41:17.738: Theme parsing error: 
> gtk-keys.css:1:0: Failed to import: Error opening file 
> /gnu/store/gazmlv80882hgkdnfdzl50b4m8xxj1bz-gtk+-3.24.23/share/themes/Emacs/gtk-3.0/gtk-keys.css:
>  Permission denied
> ! SyncTeX Error : No file?


> (evince:22463): Gtk-WARNING **: 19:41:41.122: 
> /gnu/store/gazmlv80882hgkdnfdzl50b4m8xxj1bz-gtk+-3.24.23/lib/gtk-3.0/3.0.0/printbackends/
>  cannot open shared object file: Permission denied
> --8<---------------cut here---------------end--------------->8---

Once you did “guix build -L path/to/emacs-maint.scm emacs-maint”, what
did you next?  “guix install” so which packages in the profile?  Or
“guix environment” so with or without ’--pure’?  so with which
’--ad-hoc’ packages?

> I suppose this is caused by the following environment variable that
> exist in Emacs environment:
> GTK_PATH=/gnu/store/gazmlv80882hgkdnfdzl50b4m8xxj1bz-gtk+-3.24.23/lib/gtk-3.0

What do you mean by Emacs environment?

> This error does not occur when I launch Debian's evince from a manually
> compiled Emacs 27.1.50.

It seems expected.

> * Time zone data
> In Guix emacs-maint (as well as in Guix emacs), Emacs wrongly evaluates
> the following function call:
>     (current-time-zone nil "America/Sao_Paulo")
> It returns `(0 "America")'.  In a manually compiled 27.1.50 I get the
> correct result.

What do you expect to have?  This value (-10800 "-03")?  On my machine
“(current-time-zone)” is correct but not “(current-time-zone nil
"Europe/Paris")” which returns “(0 "CET")” instead of “(3600 "CET")”.

Maybe it is a “bug” related to how Guix deals with timestamps because of
reproducibility.  I do not know.

All the best,

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