cli/flake.nix

{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-parts.url = "github:hercules-ci/flake-parts";
    systems.url = "github:nix-systems/default";

    # Dev tools
    treefmt-nix.url = "github:numtide/treefmt-nix";
  };

  outputs = inputs:
    inputs.flake-parts.lib.mkFlake {inherit inputs;} {
      systems = import inputs.systems;
      imports = [
        inputs.treefmt-nix.flakeModule
      ];
      perSystem = {
        config,
        self',
        pkgs,
        lib,
        system,
        ...
      }: let
        cargoToml = builtins.fromTOML (builtins.readFile ./Cargo.toml);
        nonRustDeps = with pkgs; [
          libiconv
          libudev-zero
          pkg-config
        ];
        rust-toolchain = pkgs.symlinkJoin {
          name = "rust-toolchain";
          paths = with pkgs; [rustc cargo cargo-watch rust-analyzer rustPlatform.rustcSrc];
        };
        udev-rule = builtins.readFile ./heliox.udev;
      in {
        # Rust package
        packages.default = pkgs.rustPlatform.buildRustPackage {
          inherit (cargoToml.package) name version;
          src = ./.;
          cargoLock.lockFile = ./Cargo.lock;
          nativeBuildInputs = with pkgs; [pkg-config udev libudev-zero];
          buildInputs = with pkgs; [udev libudev-zero];
          postInstall = ''
            mkdir -p $out/etc/udev/rules.d
            echo '${udev-rule}' > $out/etc/udev/rules.d/70-heliox.rules
          '';
        };

        # Rust dev environment
        devShells.default = pkgs.mkShell {
          inputsFrom = [
            config.treefmt.build.devShell
          ];
          buildInputs = nonRustDeps;
          nativeBuildInputs = with pkgs; [
            rust-toolchain
          ];
          RUST_BACKTRACE = 1;
        };

        treefmt.config = {
          projectRootFile = "flake.nix";
          programs = {
            nixpkgs-fmt.enable = true;
            rustfmt.enable = true;
          };
        };
      };
    };
}