[bug#44170] [PATCH] gnu: Correct Inkscape extension dependencies

[Christopher Baines <mail@cbaines.net>]

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Ekaitz Zarraga <ekaitz@elenq.tech> writes:

> Updated with file-name thanks to Christopher Baines' help.
>
> Guix lint is not complaining anymore about the file name.
>
> (it complains about the version but it's because of a bad naming system
> upstream)

I've had a proper look at this patch now. In general, especially for
adding new packages, do one thing per commit. I've split out the
addition of python-scour in to it's own commit and pushed that now.

I had some thoughts on the inkscape changes though.

> From 931147a8dfe30f96e634a9aabc58955d2ff1b475 Mon Sep 17 00:00:00 2001
> From: Ekaitz Zarraga <ekaitz@elenq.tech>
> Date: Wed, 21 Oct 2020 19:08:20 +0200
> Subject: [PATCH] gnu: Correct Inkscape extension dependencies
>
>     * gnu/packages/inkscape.scm (inkscape@1.0.1): Add dependencies.
>     * gnu/packages/python-xyz.scm (python-scour): New variable.
> ---
>  gnu/packages/inkscape.scm   | 28 ++++++++++++++++++++++++++--
>  gnu/packages/python-xyz.scm | 27 +++++++++++++++++++++++++++
>  2 files changed, 53 insertions(+), 2 deletions(-)
>
> diff --git a/gnu/packages/inkscape.scm b/gnu/packages/inkscape.scm
> index 4ac3cf3966..85b4b5020f 100644
> --- a/gnu/packages/inkscape.scm
> +++ b/gnu/packages/inkscape.scm
> @@ -6,6 +6,7 @@
>  ;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
>  ;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
>  ;;; Copyright © 2020 Boris A. Dekshteyn <boris.dekshteyn@gmail.com>
> +;;; Copyright © 2020 Ekaitz Zarraga <ekaitz@elenq.tech>
>  ;;;
>  ;;; This file is part of GNU Guix.
>  ;;;
> @@ -44,6 +45,7 @@
>    #:use-module (gnu packages pdf)
>    #:use-module (gnu packages popt)
>    #:use-module (gnu packages python)
> +  #:use-module (gnu packages python-xyz)
>    #:use-module (gnu packages xml)
>    #:use-module (gnu packages ghostscript)
>    #:use-module (gnu packages fontutils)
> @@ -250,7 +252,25 @@ endif()~%~%"
>           (add-after 'install 'glib-or-gtk-compile-schemas
>             (assoc-ref glib-or-gtk:%standard-phases 'glib-or-gtk-compile-schemas))
>           (add-after 'glib-or-gtk-compile-schemas 'glib-or-gtk-wrap
> -           (assoc-ref glib-or-gtk:%standard-phases 'glib-or-gtk-wrap)))))
> +           (assoc-ref glib-or-gtk:%standard-phases 'glib-or-gtk-wrap))
> +         (add-after 'install 'wrap-program
> +           ;; Ensure correct Python at runtime.
> +           (lambda* (#:key inputs outputs #:allow-other-keys)
> +             (let* ((out (assoc-ref outputs "out"))
> +                    (python (assoc-ref inputs "python"))
> +                    (file (string-append out "/bin/inkscape"))
> +                    (path (string-append
> +                           out
> +                           "/lib/python"
> +                           ,(version-major+minor
> +                             (package-version python))
> +                           "/site-packages:"

I had a look in the output, and it doesn't contain lib/python, so this
bit won't do anything as far as I can see? The PYTHONPATH bit is fine.

> +                           (getenv "PYTHONPATH"))))
> +               (wrap-program file
> +                 `("PYTHONPATH" ":" prefix (,path))
> +                 `("PATH" ":" prefix
> +                   (,(string-append python "/bin:")))))

The : after /bin is unnecessary.

Also, it looks like python-wrapper is already referenced lots in the
output, did you have a specific reason why wrapping inkscape with the
PATH was useful?

> +             #t)))))
>      (inputs
>       `(("aspell" ,aspell)
>         ("autotrace" ,autotrace)
> @@ -283,7 +303,11 @@ endif()~%~%"
>         ("googletest" ,googletest)
>         ("perl" ,perl)
>         ("pkg-config" ,pkg-config)
> -       ("python" ,python-wrapper)))
> +       ("python" ,python-wrapper)
> +       ("python-scour" ,python-scour)
> +       ("python-pyserial" ,python-pyserial)
> +       ("python-numpy" ,python-numpy)
> +       ("python-lxml" ,python-lxml)))

So, before python-wrapper was a native-input, and you've added some
Python packages as native inputs.

The distinction for inkscape between an input and a native input is
mostly academic at this point, because the meson build system doesn't
support cross builds.

However, inkscape already uses references python-wrapper in its output,
so it should probably be an input. With this change, you're also setting
out that inkscape should be able to use these Python libraries at
runtime, hence they should be inputs (matching the architecture you're
building for), rather than native inputs (matching the architecture
you're building on).

Does that make sense?

Thanks,

Chris

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