flake.lock

@@ -665,7 +665,8 @@
         "nuschtos": "nuschtos",
         "snm": "snm",
         "sops-nix": "sops-nix_2",
-        "srvos": "srvos"
+        "srvos": "srvos",
+        "treefmt-nix": "treefmt-nix_4"
       }
     },
     "snm": {
@@ -866,6 +867,26 @@
         "repo": "treefmt-nix",
         "type": "github"
       }
+    },
+    "treefmt-nix_4": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1743081648,
+        "narHash": "sha256-WRAylyYptt6OX5eCEBWyTwOEqEtD6zt33rlUkr6u3cE=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "29a3d7b768c70addce17af0869f6e2bd8f5be4b7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -59,17 +59,25 @@
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.disko.follows = "disko";
     };
+
+    # Flake Stuff
+    treefmt-nix = {
+      url = "github:numtide/treefmt-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs =
     inputs@{
       self,
       nixpkgs,
+      treefmt-nix,
       ...
     }:
     let
       forSystems = f: nixpkgs.lib.attrsets.genAttrs nixpkgs.lib.systems.flakeExposed (system: f system);
       pkgs' = system: nixpkgs.legacyPackages.${system};
+      treefmtEval = system: treefmt-nix.lib.evalModule (pkgs' system) ./treefmt.nix;
     in
     {
       modules.default = import ./modules;
@@ -83,25 +91,9 @@
           pkgs = pkgs' system;
         }
       );
-      formatter = forSystems (
-        system:
-        let
-          pkgs = pkgs' system;
-        in
-        pkgs.treefmt.withConfig {
-          runtimeInputs = with pkgs; [
-            nixfmt-rfc-style
-          ];
-          settings = {
-            tree-root-file = ".git/index";
-            formatter = {
-              nixfmt = {
-                command = "nixfmt";
-                includes = [ "*.nix" ];
-              };
-            };
-          };
-        }
-      );
+      formatter = forSystems (system: (treefmtEval system).config.build.wrapper);
+      checks = forSystems (system: {
+        formatting = (treefmtEval system).config.build.check self;
+      });
     };
 }

nixos-modules/audio/default.nix

@@ -65,13 +65,13 @@ in
     environment.sessionVariables =
       let
         makePluginPath =
-          format:
-          "$HOME/.${format}:"
-          + (lib.makeSearchPath format [
+        format:
+          "$HOME/.${format}:" +
+          (lib.makeSearchPath format [
             "$HOME/.nix-profile/lib"
             "/run/current-system/sw/lib"
             "/etc/profiles/per-user/$USER/lib"
-          ]);
+            ]);
       in
       {
         CLAP_PATH = lib.mkDefault (makePluginPath "clap");

systems/hetzner/default.nix

@@ -7,8 +7,7 @@
 }:
 
 let
-  network_interface_name =
-    (lib.elemAt config.facter.report.hardware.network_interface 0).unix_device_name;
+  network_interface_name = (lib.elemAt config.facter.report.hardware.network_interface 0).unix_device_name;
 in
 {
 
@@ -117,7 +116,7 @@ in
           federating = true;
           federation_incoming_replies_max_depth = null;
           max_remote_account_fields = 100;
-          federated_timeline_available = true;
+          federated_timeline_available =true;
           languages = [
             "en"
             "de"

systems/omoikane/hardware.nix

@@ -12,10 +12,7 @@
   fileSystems."/home/jopejoe1/Public/games" = {
     device = "/dev/sda";
     fsType = "bcachefs";
-    options = [
-      "compression=zstd"
-      "nofail"
-    ];
+    options = [ "compression=zstd" "nofail" ];
   };
 
   powerManagement.cpuFreqGovernor = lib.mkDefault "ondemand";

treefmt.nix

@@ -0,0 +1,5 @@
+{ pkgs, ... }:
+{
+  projectRootFile = "flake.nix";
+  programs.nixfmt-rfc-style.enable = true;
+}