Pumpkin/flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-parts.url = "github:hercules-ci/flake-parts";
    flake-compat.url = "https://flakehub.com/f/edolstra/flake-compat/1.tar.gz";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs@{ nixpkgs, flake-parts, ... }:
    flake-parts.lib.mkFlake {inherit inputs;} {
      systems = nixpkgs.lib.systems.flakeExposed;
      perSystem = {
        pkgs,
        system,
        ...
      }:
      let
        rustToolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
        manifest = (pkgs.lib.importTOML ./pumpkin/Cargo.toml).package;
      in
      {
        formatter = pkgs.nixfmt-rfc-style;
        _module.args.pkgs = import nixpkgs {
          inherit system;
          overlays = [
            (import inputs.rust-overlay)
          ];
        };

        devShells.default = pkgs.mkShell
        {
          nativeBuildInputs = with pkgs; [
            (rustToolchain.override {
                extensions = ["rust-src"];
            })
            pkg-config
          ];
        };

        packages.default = (pkgs.makeRustPlatform {rustc = rustToolchain; cargo = rustToolchain;}).buildRustPackage {
            pname = manifest.name;
            version = manifest.version;

            useFetchCargoVendor = true;
            cargoLock = {
                lockFile = ./Cargo.lock;
            };
        };
      };
    };
}