nixide/dev/flake-module.nix

{ lib, inputs, withSystem, ... }: {
  imports = [
    inputs.pre-commit-hooks-nix.flakeModule
    inputs.hercules-ci-effects.flakeModule
  ];
  perSystem = { config, pkgs, ... }: {

    pre-commit.settings.hooks.nixpkgs-fmt.enable = true;
    # Temporarily disable rustfmt due to configuration issues
    # pre-commit.settings.hooks.rustfmt.enable = true;
    pre-commit.settings.settings.rust.cargoManifestPath = "./rust/Cargo.toml";

    # Check that we're using ///-style doc comments in Rust code.
    #
    # Unfortunately, rustfmt won't do this for us yet - at least not
    # without nightly, and it might do too much.
    pre-commit.settings.hooks.rust-doc-comments = {
      enable = true;
      files = "\\.rs$";
      entry = "${pkgs.writeScript "rust-doc-comments" ''
        #!${pkgs.runtimeShell}
        set -uxo pipefail
        grep -n -C3 --color=always -F '/**' "$@"
        r=$?
        set -e
        if [ $r -eq 0 ]; then
          echo "Please replace /**-style comments by /// style comments in Rust code."
          exit 1
        fi
      ''}";
    };

    devShells.default = pkgs.mkShell {
      name = "nix-bindings-devshell";
      strictDeps = true;
      inputsFrom = [ config.nci.outputs.nix-bindings.devShell ];
      inherit (config.nci.outputs.nix-bindings.devShell.env)
        LIBCLANG_PATH
        NIX_CC_UNWRAPPED
        ;
      NIX_DEBUG_INFO_DIRS =
        let
          # TODO: add to Nixpkgs lib
          getDebug = pkg:
            if pkg?debug then pkg.debug
            else if pkg?lib then pkg.lib
            else pkg;
        in
        "${getDebug config.packages.nix}/lib/debug";
      buildInputs = [
        config.packages.nix
      ];
      nativeBuildInputs = [
        pkgs.rust-analyzer
        pkgs.nixpkgs-fmt
        pkgs.rustfmt
        pkgs.pkg-config
        pkgs.clang-tools # clangd
        pkgs.valgrind
        pkgs.gdb
        pkgs.hci
        # TODO: set up cargo-valgrind in shell and build
        #       currently both this and `cargo install cargo-valgrind`
        #       produce a binary that says ENOENT.
        # pkgs.cargo-valgrind
      ];
      shellHook = ''
        ${config.pre-commit.installationScript}
        source ${../rust/bindgen-gcc.sh}
        echo 1>&2 "Welcome to the development shell!"
      '';
      # rust-analyzer needs a NIX_PATH for some reason
      NIX_PATH = "nixpkgs=${inputs.nixpkgs}";
    };
  };
  herculesCI = hci@{ config, ... }: {
    ciSystems = [ "x86_64-linux" ];
  };
  flake = { };
}