fix(dotfiles): centralize fix app ignores

src/dotfiles/apps.nix

@@ -3,9 +3,17 @@
   lib,
   formatter,
   system,
+  ignore,
 }:
 let
+  deadnixExcludeArgs = lib.concatStringsSep " " ([ "--exclude" ] ++ ignore.deadnix);
   pkgs = inputs.nixpkgs.legacyPackages.${system};
+  statixIgnoreArgs = lib.escapeShellArgs (
+    lib.concatMap (path: [
+      "--ignore"
+      path
+    ]) ignore.statix
+  );
 in
 {
   fix = {
@@ -20,8 +28,8 @@ in
         ];
         text = ''
           treefmt
-          statix fix .
-          deadnix --edit --exclude configs/nixos/hosts/*/hardware-configuration.nix -- .
+          statix fix ${statixIgnoreArgs} .
+          deadnix --edit ${deadnixExcludeArgs} -- .
           treefmt
         '';
       }

src/dotfiles/default.nix

@@ -6,6 +6,8 @@
   system,
 }:
 let
+  ignore = import ./ignore.nix;
+
   util = import ./util.nix { inherit lib; };
 
   registry = import ./registry.nix {
@@ -43,7 +45,7 @@ in
 {
   formatter.${system} =
     (import ./formatter.nix {
-      inherit inputs system;
+      inherit inputs system ignore;
     }).config.build.wrapper;
 
   apps.${system} = import ./apps.nix {
@@ -51,6 +53,7 @@ in
       inputs
       lib
       system
+      ignore
       ;
     formatter = self.formatter.${system};
   };

src/dotfiles/formatter.nix

@@ -1,10 +1,14 @@
-{ inputs, system }:
+{
+  inputs,
+  system,
+  ignore,
+}:
 inputs.treefmt-nix.lib.evalModule inputs.nixpkgs.legacyPackages.${system} {
   projectRootFile = "flake.nix";
 
   programs.nixfmt.enable = true;
 
-  settings.formatter.nixfmt.excludes = [
-    "configs/nixos/hosts/*/hardware-configuration.nix"
-  ];
+  settings.excludes = ignore.treefmt;
+
+  settings.formatter.nixfmt.excludes = ignore.nixfmt;
 }

src/dotfiles/ignore.nix

@@ -0,0 +1,22 @@
+let
+  hardwareConfigurations = "configs/nixos/hosts/*/hardware-configuration.nix";
+  thirdParty = "third_party";
+in
+{
+  deadnix = [
+    thirdParty
+    hardwareConfigurations
+  ];
+
+  nixfmt = [
+    hardwareConfigurations
+  ];
+
+  statix = [
+    "${thirdParty}/**"
+  ];
+
+  treefmt = [
+    "${thirdParty}/**"
+  ];
+}