devenv: add languages.nix module

1 files changed, 29 insertions, 0 deletions

diff --git a/modules/devenv/languages/nix.nix b/modules/devenv/languages/nix.nix
new file mode 100644
index 0000000..6db3af4
--- /dev/null
+++ b/modules/devenv/languages/nix.nix
@@ -0,0 +1,29 @@
+{
+  config,
+  options,
+  lib,
+  pkgs,
+  devenv,
+  ...
+}: let
+  cfg = config.languages.nix;
+in {
+  disabledModules = ["${devenv}/src/modules/languages/nix.nix"];
+
+  options.languages.nix = {
+    enable = lib.mkEnableOption "tools for nix development";
+    formatter = lib.mkPackageOption pkgs "nix formatter" {
+      default = ["alejandra"];
+    };
+    packaging.enable = lib.mkEnableOption "tools for writing nix derivations";
+  };
+
+  config = {
+    packages = lib.mkIf cfg.enable (with pkgs; [cfg.formatter deadnix] ++ lib.optionals cfg.packaging.enable [nix-prefetch-scripts nix-prefetch-github]);
+
+    pre-commit.hooks = {
+      deadnix.enable = lib.mkDefault true;
+      "${cfg.formatter.pname}".enable = lib.mkDefault true;
+    };
+  };
+}