feat: init

templates/default/nix/formatter.nix

@@ -0,0 +1,70 @@
+{
+  pkgs,
+  inputs,
+  perSystem,
+  ...
+}:
+let
+  settingsNix = {
+    package = perSystem.nixpkgs.treefmt2;
+
+    projectRootFile = ".git/config";
+
+    programs = {
+      nixfmt.enable = true;
+      deadnix = {
+        enable = true;
+        no-underscore = true;
+      };
+      statix.enable = true;
+
+      rustfmt.enable = true;
+
+      gofmt.enable = true;
+
+      shfmt.enable = true;
+
+      prettier.enable = true;
+    } // pkgs.lib.optionalAttrs (pkgs.system != "riscv64-linux") { shellcheck.enable = true; };
+
+    settings = {
+      global.excludes = [
+        "LICENSE"
+        # unsupported extensions
+        "*.{gif,png,svg,tape,mts,lock,mod,sum,toml,env,envrc,gitignore}"
+      ];
+
+      formatter = {
+        deadnix = {
+          priority = 1;
+        };
+
+        nixfmt = {
+          priority = 2;
+        };
+
+        statix = {
+          priority = 3;
+        };
+
+        prettier = {
+          options = [
+            "--tab-width"
+            "2"
+          ];
+          includes = [ "*.{css,html,js,json,jsx,md,mdx,scss,ts,yaml}" ];
+        };
+      };
+    };
+  };
+
+  treefmtEval = inputs.treefmt-nix.lib.evalModule pkgs settingsNix;
+
+in
+treefmtEval.config.build.wrapper.overrideAttrs (_: {
+  passthru = {
+    inherit (treefmtEval.config) package settings;
+    inherit (treefmtEval) config;
+    inherit settingsNix;
+  };
+})