Re: Updating minetest to 5.6.0?

[Maxime Devos]

On 16-09-2022 19:57, Jan Wielkiewicz wrote:
> Last one question before sending the patches: I'm adding a minetest game 
> called Exile and it uses a mod called naturalslopeslib. I packaged both 
> of them but Exile expects the lib to be installed in 
> "/.guix-profile/share/minetest/games/exile/mods/naturalslopeslib/". 
> Should I add the mod as a propagated-input of Exile or should I directly 
> copy/link the lib into Exile's tree (if so, how do I go about that)?

How about modifying minetest-exile's phases to add a symlink in
#$output /share/minetest/games/exile/mods/naturalslopeslib
pointing to #$(this-package-input "minetest-naturalslopeslib")?

(I don't know how to do that with copy-build-system though, does that 
build system support phases?  I was thinking of a post-install phase or 
a post-unpack)

(Also I don't know if Minetest allows symlinks inside mods)

That way:

  * it doesn't have to be propagated (so naturalslopeslib only appears
    in the (non-game) mod if the user actually asked to install the Guix
    package, and not as a consequence of installing something else

  * by using a symlink instead of a copy, a little space, network IO,
    disk IO and build time is saved, e.g. when the user installs both
    minetest-exile and minetest-naturalslopeslib

I think it would be feasible to write a 'minetest-game-build-system' to 
mostly automatically do such things, but currently such a thing does not 
exist yet.

Greetings,
Maxime.

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