GNU bug report logs - #50625
ghostscript shell scripts refer to unqualified external commands

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jack Hill <jackhill <at> jackhill.us>
To: bug-guix <at> gnu.org
Subject: ghostscript shell scripts refer to unqualified external commands
Date: Thu, 16 Sep 2021 11:28:40 -0400 (EDT)

Hi Guix,

Many of the commands, e.g. ps2pdf, provided by the ghostscript package are 
implemented as shell scripts that do some argument or file name processing 
before invoking the main gs binary. These scripts invoke external commands 
like basename, awk, dirname, and even gs by dynamically looking them up 
PATH. Instead, they should refer to a specific path in the store so that 
the behavior of ghostscript doesn't depend on the environment and so that 
Guix can see these references.

Best,
Jack

Message #8 received at 50625 <at> debbugs.gnu.org (full text, mbox):

From: zimoun <zimon.toutoune <at> gmail.com>
To: Jack Hill <jackhill <at> jackhill.us>
Cc: 50625 <at> debbugs.gnu.org
Subject: Re: bug#50625: ghostscript shell scripts refer to unqualified
 external commands
Date: Fri, 17 Sep 2021 16:44:54 +0200

Hi,

On Thu, 16 Sept 2021 at 17:29, Jack Hill <jackhill <at> jackhill.us> wrote:

> Many of the commands, e.g. ps2pdf, provided by the ghostscript package are
> implemented as shell scripts that do some argument or file name processing
> before invoking the main gs binary. These scripts invoke external commands
> like basename, awk, dirname, and even gs by dynamically looking them up
> PATH. Instead, they should refer to a specific path in the store so that
> the behavior of ghostscript doesn't depend on the environment and so that
> Guix can see these references.

Indeed.

--8<---------------cut here---------------start------------->8---
$ guix environment -C --ad-hoc ghostscript
[env]$ ps2pdf --version
/gnu/store/jc3x02w3dmbff7s5r7g2d21r2jswag4p-profile/bin/ps2pdf: line
8: dirname: command not found
/gnu/store/jc3x02w3dmbff7s5r7g2d21r2jswag4p-profile/bin/ps2pdf14: line
3: dirname: command not found
/gnu/store/jc3x02w3dmbff7s5r7g2d21r2jswag4p-profile/bin/ps2pdfwr: line
7: dirname: command not found
/gnu/store/jc3x02w3dmbff7s5r7g2d21r2jswag4p-profile/bin/ps2pdfwr: line
24: basename: command not found
Usage:  [options...] (input.[e]ps|-) [output.pdf|-]
--8<---------------cut here---------------end--------------->8---

The fix would to add these external commands as 'inputs' and then let
'wrap-program'.  Do you want to give a try?

Cheers,
simon

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