rust-template/flake.nix

{
  description = "A Rust project template using Nix flakes (rust-overlay, naersk, flake-utils)";

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

  outputs = inputs@{ self, nixpkgs, flake-utils, rust-overlay, naersk, ... }:
    flake-utils.lib.eachSystem flake-utils.lib.allSystems (system:
      let
        projectName = "rust-template";
        projectVersion = "0.1.0";
        rustVersion = "latest";

        pkgs = import nixpkgs {
          inherit system;
          overlays = [ (import rust-overlay) ];
        };

        rustToolchain = pkgs.rust-bin.stable."${rustVersion}".default;

        rustLibSrc = "${rustToolchain}/lib/rustlib/src/rust";

        commonBuildInputs = with pkgs; [
          glib
        ];

        commonNativeBuildInputs = with pkgs; [
          pkg-config
        ];

        devPackages = with pkgs; [
          # Rust-specific tools
          rustToolchain
          rust-analyzer
          sccache
          cargo-watch

          # General developer experience
          just
          nil
          alejandra
          direnv
          nix-direnv
        ] ++ commonNativeBuildInputs ++ commonBuildInputs;

        myRustProject = naersk.lib."${system}".buildPackage {
          inherit (self) src;
          rustToolchain = rustToolchain;
          pname = projectName;
          version = projectVersion;
          nativeBuildInputs = commonNativeBuildInputs;
          buildInputs = commonBuildInputs;
          cargoLock = {
            lockFile = ./Cargo.lock;
          };
        };

      in
      {
        packages.default = myRustProject;

        packages.rustToolchain = rustToolchain;

        devShells.default = pkgs.mkShell {
          name = "${projectName}-dev-shell";

          inputsFrom = [ rustToolchain ];

          RUST_SRC_PATH = rustLibSrc;
          RUSTC_WRAPPER = "${pkgs.sccache}/bin/sccache";
          SCCACHE_DIR = "$HOME/.cache/sccache";

          packages = devPackages;

          shellHook = ''
            echo "Welcome to the Rust development shell!"
            echo "Current Rust version: $(rustc --version)"
            echo "Current Cargo version: $(cargo --version)"
          '';
        };

        apps.default = flake-utils.lib.mkApp {
          drv = myRustProject;
        };

        checks.build = myRustProject;
      });
}