Fix Helix integration with treefmt

.helix/languages.toml

@@ -1,18 +1,21 @@
+# TODO: switch to "%{buffer_name}" when this feature makes it to Helix release
+
 [[language]]
-auto-format = true
 name = "nix"
-formatter = { command = "nixfmt" }
+formatter = { command = "treefmt", args = ["--stdin", ".nix", "--quiet"] }
+auto-format = true
 
 [[language]]
 name = "toml"
-formatter = { command = "taplo", args = ["format", "-"] }
+formatter = { command = "treefmt", args = ["--stdin", ".nix", "--quiet"] }
 auto-format = true
 
 [[language]]
 name = "yaml"
-formatter = { command = 'prettier', args = ["--parser", "yaml"] }
+formatter = { command = "treefmt", args = ["--stdin", ".nix", "--quiet"] }
 auto-format = true
 
 [[language]]
 name = "markdown"
-formatter = { command = 'prettier', args = ["--parser", "markdown"] }
+formatter = { command = "treefmt", args = ["--stdin", ".nix", "--quiet"] }
+auto-format = true

flake.lock

@@ -178,6 +178,22 @@
         "type": "github"
       }
     },
+    "nixpkgs_3": {
+      "locked": {
+        "lastModified": 1747958103,
+        "narHash": "sha256-qmmFCrfBwSHoWw7cVK4Aj+fns+c54EBP8cGqp/yK410=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "fe51d34885f7b5e3e7b59572796e1bcb427eccb1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nur": {
       "inputs": {
         "flake-parts": "flake-parts",
@@ -205,7 +221,8 @@
         "nixgl": "nixgl",
         "nixpkgs": "nixpkgs",
         "nur": "nur",
-        "sops-nix": "sops-nix"
+        "sops-nix": "sops-nix",
+        "treefmt-nix": "treefmt-nix_2"
       }
     },
     "sops-nix": {
@@ -263,6 +280,24 @@
         "repo": "treefmt-nix",
         "type": "github"
       }
+    },
+    "treefmt-nix_2": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_3"
+      },
+      "locked": {
+        "lastModified": 1750931469,
+        "narHash": "sha256-0IEdQB1nS+uViQw4k3VGUXntjkDp7aAlqcxdewb/hAc=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "ac8e6f32e11e9c7f153823abc3ab007f2a65d3e1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -1,34 +1,38 @@
+# TODO: Add flake-utils, flake-parts, git-pre-hook
 {
   description = "My Home Manager configuration";
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     home-manager = {
       url = "github:nix-community/home-manager/master";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    nur.url = "github:nix-community/NUR";
-    nixgl = {
-      url = "github:nix-community/nixGL";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
     lix-module = {
       url = "https://git.lix.systems/lix-project/nixos-module/archive/2.93.1.tar.gz";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    nixgl = {
+      url = "github:nix-community/nixGL";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nur.url = "github:nix-community/NUR";
     sops-nix = {
       url = "github:Mic92/sops-nix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    treefmt-nix.url = "github:numtide/treefmt-nix";
   };
 
   outputs =
     {
-      nixpkgs,
+      self,
       home-manager,
-      nur,
-      nixgl,
       lix-module,
+      nixgl,
+      nixpkgs,
+      nur,
       sops-nix,
+      treefmt-nix,
       ...
     }:
     let
@@ -40,14 +44,13 @@
           nixgl.overlays.default
         ];
       };
+      treefmtEval = treefmt-nix.lib.evalModule pkgs ./treefmt.nix;
     in
     {
       homeConfigurations = {
         sudoer777 = home-manager.lib.homeManagerConfiguration {
           inherit pkgs;
-          extraSpecialArgs = {
-            inherit nixgl;
-          };
+          extraSpecialArgs = { inherit nixgl; };
           modules = [
             ./home.nix
             lix-module.nixosModules.default
@@ -64,18 +67,21 @@
       devShells.${system}.default = pkgs.mkShell {
         buildInputs = [
           pkgs.age
-          pkgs.sops
-          pkgs.just
           pkgs.forgejo-cli
-          pkgs.nil
-          pkgs.nixfmt-rfc-style
-          pkgs.taplo
-          pkgs.marksman
           pkgs.helix
+          pkgs.just
+          pkgs.marksman
+          pkgs.nil
+          pkgs.sops
+          pkgs.taplo
           pkgs.uutils-coreutils
-          pkgs.prettier
           pkgs.yaml-language-server
+          treefmtEval.config.build.wrapper
         ];
       };
+      formatter.${system} = treefmtEval.config.build.wrapper;
+      checks.${system} = {
+        formatting = treefmtEval.config.build.check self;
+      };
     };
 }

home.nix

@@ -1,7 +1,7 @@
 {
-  pkgs,
-  nixgl,
   config,
+  nixgl,
+  pkgs,
   ...
 }:
 

treefmt.nix

@@ -0,0 +1,16 @@
+{ ... }:
+{
+  projectRootFile = "flake.nix";
+  programs = {
+    nixfmt = {
+      enable = true;
+      strict = true;
+    };
+    prettier = {
+      enable = true;
+    };
+    taplo = {
+      enable = true;
+    };
+  };
+}