bug#50625: ghostscript shell scripts refer to unqualified external commands

[zimoun]

Hi,

On Thu, 16 Sept 2021 at 17:29, Jack Hill <jackhill@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