Le 19 mai 2020 17:05:49 GMT-04:00, Jan <tona_kosmicznego_smie...@interia.pl> a écrit : >Hello, > >Recently I decided to update the Minetest package, which isn't a >problem >itself, but I discovered the package fails to provide the default >minetest game. For those who don't know, Minetest is extensible by >desing - all you do is you put a modification/game into a folder - >usually /share/minetest/games or ~/.minetest/games and it is run by the >game engine. >I checked the source code and there's a non-public minetest-data >package, which provides the minetest_game and it contains this: > >(arguments > `(#:modules ((guix build utils)) > #:builder (begin > (use-modules (guix build utils)) > (let ((install-dir (string-append > %output > "/share/minetest/games/minetest_game"))) > (mkdir-p install-dir) > (copy-recursively > (assoc-ref %build-inputs "source") > install-dir) > #t)))) > >And this package is in the propagated-inputs fiend of the minetest >package, but it doesn't work. > >I would like to understand why it doesn't work, fix it and learn >something new about Guix by the way :) > >The second problem I encountered during examining the package was every >time I changed the path of the minetest_game in the minetest-data >package minetest was also recompiled, which took long time. (I thought >the path is improper) >My question is, what is the Guix way of dealing with such packages? >Imagine we have like 100 packaged minetest mods/games. Say I wanted to >add one, would I have to recompile the whole minetest package (C++), >despite the fact all mods are just Lua scripts put into folder and >interpreted by the engine? > >Could we for example place the mods in the ~/.minetest/games folder? > > >Jan Wielkiewicz
The minetest package declares MINETEST_SUBGAME_PATH. This means that minetest reads (or used to read) that environment variable to find its games. Can you check it is set in your system? Guix should have told you about it (and relogin should set it automatically). There might be a similar variable for mods we need to declare. Minetest gets rebuilt because one of its inputs is different. That's the way guix works, because we cannot be sure the package will be the same with a different input. If we didn't, we would not guarantee reproducibility. I think simply installing mods/games in share/minetest/games should work. Installing the additional package in your profile will make them available to the game. Setting MINETEST_SUBGAME_PATH to a local directory in your home might work as well. HTH!
