Re: gnu: imagemagick/fixed: Redirect old sonames to new sonames.

[Mark H Weaver]

Hi Léo,

Regarding your commit:

> From 2e0ff59f0cd836b156f1ef2e78791d864ce3cfcd Mon Sep 17 00:00:00 2001
> From: Léo Le Bouter <lle-bout@zaclys.net>
> Date: Thu, 18 Mar 2021 11:12:51 +0100
> Subject: [PATCH] gnu: imagemagick/fixed: Redirect old sonames to new sonames.
> 
> * gnu/packages/imagemagick.scm (imagemagick/fixed)[arguments]: Add
> 'fix-compat-cheat-rename-so phase to redirect old soname paths (expected
> without grafting) to new sonames introduced by ImageMagick 6.9.12-0 and
> later. These sonames are probably not forward compatible but most probably
> backwards compatible so it should suffice until we remove the graft.
> ---
>  gnu/packages/imagemagick.scm | 24 +++++++++++++++++++++++-
>  1 file changed, 23 insertions(+), 1 deletion(-)
> 
> diff --git a/gnu/packages/imagemagick.scm b/gnu/packages/imagemagick.scm
> index 9ac15361b4..a3562f2e13 100644
> --- a/gnu/packages/imagemagick.scm
> +++ b/gnu/packages/imagemagick.scm
> @@ -143,7 +143,29 @@ text, lines, polygons, ellipses and Bézier curves.")
>                                    "6.9.12-2.tar.xz"))
>                (sha256
>                 (base32
> -                "17da5zihz58qm41y61sbvw626m5xfwr2nzszlikrvxyq1j1q7asa"))))))
> +                "17da5zihz58qm41y61sbvw626m5xfwr2nzszlikrvxyq1j1q7asa"))))
> +    (arguments
> +     (substitute-keyword-arguments (package-arguments imagemagick)
> +       ((#:phases phases)
> +        `(modify-phases ,phases
> +           (add-after 'install 'fix-compat-cheat-rename-so
> +             (lambda* (#:key outputs #:allow-other-keys)
> +               (with-directory-excursion
> +                   (string-append (assoc-ref outputs "out")
> +                                  "/lib")
> +                 (symlink "libMagick++-6.Q16.so.9.0.0"
> +                          "libMagick++-6.Q16.so.8.0.0")
> +                 (symlink "libMagick++-6.Q16.so.9"
> +                          "libMagick++-6.Q16.so.8")
> +                 (symlink "libMagickCore-6.Q16.so.7.0.0"
> +                          "libMagickCore-6.Q16.so.6.0.0")
> +                 (symlink "libMagickCore-6.Q16.so.7"
> +                          "libMagickCore-6.Q16.so.6")
> +                 (symlink "libMagickWand-6.Q16.so.7.0.0"
> +                          "libMagickWand-6.Q16.so.6.0.0")
> +                 (symlink "libMagickWand-6.Q16.so.7"
> +                          "libMagickWand-6.Q16.so.6"))
> +               #t))))))))

This is really nasty.  Why is imagemagick grafted, anyway?  I think it
can simply be updated without causing many rebuilds, no?

     Regards,
       Mark