flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    {
      self,
      nixpkgs,
      flake-utils,
      rust-overlay,
      ...
    }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ rust-overlay.overlays.default ];
        };
        my-crate = pkgs.rustPlatform.buildRustPackage {
          name = "traO-Judge-helper";
          pname = "toj-helper";
          src = ./.;
          cargoLock.lockFile = ./Cargo.lock;
          nativeBuildInputs = with pkgs; [
            pkg-config
            openssl
            openssl.dev
          ];
          PKG_CONFIG_PATH = "${pkgs.openssl.dev}/lib/pkgconfig";
        };
      in
      {
        packages.default = my-crate;
        formatter = pkgs.nixfmt-rfc-style;
      }
    );
}