Add Flake for NixOS

[jaoleal]

Edit bromeon: copied description from #1068

Case

So, after spending 4 whole days to make the bindgen and the gdnative work on my NixOs i came with a flake that i want to share.
i got fundamental help of my super NixOs-User @storopoli.

Flake

#jaoleal/Uni9Jogo@3dcc053
Its not perfect and theres some diferences of the official one in the book

Cons

• Does not have support for non-nixos nix environment since it does not include NixGL

Pros

• Does not have NixGL
• Will not break with rust updates(the old one did)

Feel free to help improve it

[Bromeon]

Relevant book page: https://godot-rust.github.io/gdnative-book/recipes/nix-build-system.html

I'm not sure if the repo is the right place for this, especially now that we have it in two places (book + here).

Could you elaborate more concretely how the existing Flake caused problems or what this improves? You mentioned brief pros/cons, but a bit more details would be nice.

[storopoli]

LGTM

[storopoli]

Could you elaborate more concretely how the existing Flake caused problems or what this improves? You mentioned brief pros/cons, but a bit more details would be nice.

You don't have a Flake. You have a suggested Nix shell that uses the system nixpkg which is not reproducible.
A flake is, since it adds a flake.lock file.
By the way we are missing that here.

[storopoli]

Add the flake.lock file as well for reproducibility

[jaoleal]

Could you elaborate more concretely how the existing Flake caused problems or what this improves? You mentioned brief pros/cons, but a bit more details would be nice.

Well, if you run a NixOs you can try the old one... iven cargo will have some problems because some out of date hardcoded deps, that is the point of the problem that i ran. The flake will do most of the work.

I'm not sure if the repo is the right place for this, especially now that we have it in two places (book + here).

I`ll commit some improves and organization of the flake.

EDIT: Sure, the root of the project isnt the best place for it, so i made the PR directly to the book.

[Bromeon]

You don't have a Flake. You have a suggested Nix shell that uses the system nixpkg which is not reproducible.

Ah, right. I was confused by this, which implied an existing Flake 🙂

Flake

Its not perfect and theres some diferences of the official one in the book

---

EDIT: Sure, the root of the project isnt the best place for it, so i made the PR directly to the book.

Thanks, also for the elaboration! I'll close this then, let's continue there.