dotfiles/templates/rust/flake.nix

{
  inputs = {
    crane = {
      url = "github:ipetkov/crane";
      inputs = {
        flake-utils.follows = "flake-utils";
        nixpkgs.follows = "nixpkgs";
      };
    };
    fenix = {
      url = "github:nix-community/fenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.url = "nixpkgs/nixos-unstable";
  };

  outputs = { self, crane, fenix, flake-utils, nixpkgs }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = (import nixpkgs) {
          inherit system;
        };
        toolchain = fenix.packages.${system}.stable;
        craneLib = crane.lib.${system}.overrideToolchain toolchain.toolchain;
        stdenv = pkgs.stdenvAdapters.useMoldLinker pkgs.stdenv;
      in
      {
        packages =
          let
            inherit (pkgs.lib) fileset;
            without = fs: fileset.difference ./. fs;
            nixFiles = fileset.unions [ ./flake.nix ./flake.lock ./.envrc ];
            gitFiles = fileset.gitTracked ./.;
            src = fileset.toSource {
              root = ./.;
              fileset = fileset.intersection (without nixFiles) gitFiles;
            };
          in
          {
            default =
              craneLib.buildPackage {
                inherit src stdenv;
              };
          };

        devShell = pkgs.mkShell.override
          {
            inherit stdenv;
          }
          {
            nativeBuildInputs = with toolchain;
              [ rustc cargo rust-analyzer clippy ] ++ (with pkgs;
              [ ]
              );
          };
      });
}