build: add nix dev + build environment + ci builds

[mrcjkb]

The obligatory flakeification 😄

[mrcjkb]

@teto for some reason, the extra buildInputs I add to the devShell (rust-analyzer, rustfmt, ...) aren't available on the PATH.
Any idea what could be the issue?

[teto]

I am never too sure about the rules but because it's not a mkShell but the program buildInputs, in which case you need propagatedBuildInputs to propagate to PATH .
Maybe if you append .inputDerivation at the end ?

[mrcjkb]

I am never too sure about the rules but because it's not a mkShell but the program buildInputs, in which case you need propagatedBuildInputs to propagate to PATH . Maybe if you append .inputDerivation at the end ?

🤔 none of it worked. Maybe it's something that rustPlatform.buildRustPackage does...
I ended up using mkShell and appending rocks.buildInputs ++ rocks.nativeBuildInputs to the shell's buildInputs.
A bit hacky, but it works 🤷

[teto]

I've had similar issues in the past so I get it. Approved

[mrcjkb]

Oops... forgot to set it to squash...

[teto]

considering the wide usage of this program, feel free to force push if you have git OCD