2 conf-files, one for the magick-core lib with the major version 6, and a second one for 7

[fccm2]

Provides 2 different conf-files, because the magick-core library version 6 is still the one that seems to be provided in Debian 12.

[fccm2]

I don't know how to make these conf-files work in case both a magick-core-6 and 7 are installed at the same time in the system. pkg-config will probably take the first .pc file found in its path.
But it will probably work for 95% of users (or more) who have only one of the two installed.

[shonfeder]

Thank you for helping to provide these conf packages!

It looks we have a few issues to resolved, flagged by our CI:

[shonfeder]

This appears to failing on all platforms with errors like

#=== ERROR while compiling conf-magick-core6.1 ================================#
# context              2.3.0 | linux/x86_64 | ocaml-base-compiler.5.3.0 | pinned
# path                 ~/.opam/5.3/.opam-switch/build/conf-magick-core6.1
# command              ~/.opam/opam-init/hooks/sandbox.sh build sh -c pkg-config --exists MagickCore && pkg-config --modversion MagickCore | awk -F. '{ if ($1 == 6) exit 0; else exit 1; }'
# exit-code            1
# env-file             ~/.opam/log/conf-magick-core6-7-671145.env
# output-file          ~/.opam/log/conf-magick-core6-7-671145.out

Except for on windows, where it is failing with

  #=== ERROR while compiling conf-magick-core6.1 ================================#
  # context     2.3.0 | win32/x86_64 | ocaml.5.3.0 | file://D:/a/opam-repository/opam-repository
  # path        D:\opamroot\default\.opam-switch\build\conf-magick-core6.1
  # command     D:\opamroot\.cygwin\root\bin\sh.exe -c pkg-config --exists MagickCore && pkg-config --modversion MagickCore | awk -F. '{ if ($1 == 6) exit 0; else exit 1; }'
  # exit-code   2
  # env-file    D:\opamroot\log\conf-magick-core6-3744-45fb94.env
  # output-file D:\opamroot\log\conf-magick-core6-3744-45fb94.out
  ### output ###
  # Can't open perl script "/cygdrive/c/Strawberry/perl/bin/pkg-config": No such file or directory

(Cf. https://github.com/ocaml/opam-repository/actions/runs/14553589502/job/40827624818?pr=27798)

I'm not sure if the right fix is to use a different check on windows via a conditional guard or if this can be changed to work on all platforms.

[fccm2]

Maybe the error code just means that the deps that are checked by this conf-file are not installed, (which is the expected result).

The Windows error code 2 maybe means that awk is not installed in Windows.

Do you have a suggestion on a better way to check the major version of the lib ?

Is there a current conf-file that I could use as an example ?

[fccm2]

Maybe we should do it with an ocaml script, rather than with awk ?

[mseri]

I think that's probably a good idea

[fccm2]

Ok, I have to figure out how to do that now.
I remember I saw we can make a patch directory, but don't remember where is the local script dir,
maybe just using the src field.

[mseri]

To begin with you can add the script in a github gist and include it to the opam file as extra-files.

Once the script is stable, we will move it to the opam-source-archives repository, and update the reference to point there. Then merge