Hi Felix,

thanks for your help

I installed ps-print package in Emacs,
but it does not work.
It says, you do need to install ghostscript.
That's why I am dealing with ghostscript.

> If that does not work, I would use the paths in the home or system
>> profile, depending on where you installed ghostview and, if it's in both
>> places, which version you would like to use.

This is exactly my question.
I don't know where Guix System installed my ghostscript package.
How can I find out this?
What are the commands to find out where I installed a package?

thanks for help

Gottfried



Am 19.11.24 um 16:04 schrieb Felix Lechner:
> Hi Gottfried,
> 
> On Mon, Nov 18 2024, gfp wrote:
> 
>> What is now the right path
> 
> In Guix, programs can be found in four places:
> 
> 1. In the store.  That is where packages are "installled," but the paths
> are cumbersome.  They involve a gibberish of characters known as
> cryptographic hashes.  In Guix, we use those paths only when referring
> from one package to another.  That's how multiple versions of the same
> thing can co-exist on Guix at the same time.  It's also why Guix is so
> stable.
> 
> 2. In your home profile (~/.guix-home/profile).  Those are symbolic
> links into the store.  The profile itself is actually in the store
> itself ("ls -al ~/.guix-home/profile" in Bash but not in Eshell) which
> then links to the final location.  Guix is all about managing those
> links.
> 
> 3. In temporary profiles, which are in ~/.cache/guix/profiles.  They are
> created by commands like 'guix shell'.
> 
> 4. If you use "Guix System" as I do, links to the programs you installed
> are aggregated in the system profile, which is located in
> /run/current-system/profile.
> 
> An environment variable called GUIX_ENVIRONMENT tracks your active
> profiles and, with proper configuration in your shell, should set PATH
> so that all programs are found without paths.
> 
> In other words, you (or any programs that inherits PATH) should be able
> to type just "gv".
> 
> With that in mind, I would first try to get rid of pr-path-alist
> altogether.
> 
>> (require 'printing)
>>      (setq pr-path-alist
>> 	    '((unix      "." "~/bin" ghostview mpage PATH)
>> 	      (ghostview "$HOME/bin/gsview-dir")
>> 	      (mpage     "$HOME/bin/mpage-dir")
>> 	      ))
> 
> If that does not work, I would use the paths in the home or system
> profile, depending on where you installed ghostview and, if it's in both
> places, which version you would like to use.
> 
> As a side note, I personally had better luck with the ps-print package
> that is described here. [1] Locally, it uses my default printer, which I
> configured in CUPS (localhost:631) and probably set to default with
> 'lpoptions' as described here. [2]
> 
> Kind regards
> Felix
> 
> [1] https://www.emacswiki.org/emacs/PrintingFromEmacs
> [2] https://arkit.co.in/set-default-printer-linux-command/