bug#46532: plantuml in pure environment does not find X11

[Maxime Devos]

On Mon, 2021-02-15 at 13:52 +0100, Dr. Arne Babenhauserheide wrote:
> Dear Guix hackers,
> 
> when installing plantuml in a pure environment, it throws an 
> java.awt.AWTError: Can't connect to X11 window server using ':1' as the value 
> of the DISPLAY variable.

Is the environment variable XAUTHORITY set?
Compare the value inside the environment and outside the environment.

Perhaps "XAUTHORITY" should be added to %precious-variables in
guix/scripts/environment.scm.  An untested patch is attached,
I'll test it now.

Greetings,
Maxime.

0001-scripts-preserve-XAUTHORITY-in-pure-environments.patch
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