Setup actions

[arnaudgolfouse]

This leverage github actions to automatically build and test the library on all 3 major platforms (linux, windows and macos).

In theory the files included in this pull request are enough to make everything just work :tm: : we just need to launch the "Build shared libraries" action.

Pros

• We would be cross-platform ! :smile:
• Easy to run on all three platforms, github takes care of everything
• Easy to add new compilation targets

Cons

• The build on windows is kind of a hack (see "Add a 'Build shared libraries' Github action" commit)
• Maybe not very environment-friendly (runs heavy workloads across the internet...). I couldn't really find data on this, but I assume we won't be using it a lot anyways, so this should not be that bad.
• Maybe you prefer another workflow :slightly_smiling_face:

Notes

• I could not make the tests work on windows. This is due to some issue with clang rather than our library having a problem, but this is kind of sad nonetheless :slightly_frowning_face:
• I tried to find a workflow that would be easy to work with, but of course modification can be made (for example, what commit message is made on "Build shared libraries").
• I don't know how to use the godot asset store with/in parallel to this.

[arnaudgolfouse]

Note that it also may be possible to simply build locally on our machines as an alternative. However :

• Building for macos requires the Apple SDK, which is not exactly easy to get (you need an Apple account, etc...)
• I think this is less maintainable
• You can't run tests for other platforms this way

[MatejSloboda]

This is great! Thanks! I'm a little worried about the windows auto-build. GNU and MSVC compilers are compatible on paper, but often not in practice, so hopefully this won't cause issues. I will update the godot asset store entry, since the commit that is linked there now apparently has bugs.

[arnaudgolfouse]

Yeah, it crossed my mind as well... I tested the produced library on a windows computer and everything seems to work fine for now. I will continue to search for a way to build it directly on windows though.

[MatejSloboda]

If necessary, I can compile the windows binaries manually. Also, should we add 32bit targets? Also, how do I operate this thing? I'm not very well versed in github. Do I just go to the "actions->build->shared libraries-> run workflow"?

[arnaudgolfouse]

Yep, that's it :slightly_smiling_face: It will create a new commit, as well as a tag named after the version number chosen. You should also be asked for a description for the commit. If this is not the behavior you want, the .github/workflows/make_release.yml file can be changed.

[arnaudgolfouse]

I will investigate 32bit too... but later ^^