formatter: add deadnix (#7331)

.github/PULL_REQUEST_TEMPLATE.md

@@ -22,7 +22,7 @@ Also make sure to read the guidelines found at
 - [ ] Change is backwards compatible.
 
 - [ ] Code formatted with `nix fmt` or
-    `nix-shell -p treefmt nixfmt-rfc-style keep-sorted --run treefmt`.
+    `nix-shell -p treefmt nixfmt-rfc-style deadnix keep-sorted --run treefmt`.
 
 - [ ] Code tested through `nix-shell --pure tests -A run.all`
     or `nix build --reference-lock-file flake.lock ./tests#test-all` using Flakes.

Makefile

@@ -17,4 +17,4 @@ test-install:
 	HOME=$(shell mktemp -d) NIX_PATH=${NIX_PATH} nix-shell . -A install
 
 format:
-	nix-shell -p treefmt nixfmt-rfc-style keep-sorted --run "treefmt --config-file ./treefmt.toml"
+	nix-shell -p treefmt nixfmt-rfc-style deadnix keep-sorted --run "treefmt --config-file ./treefmt.toml"

flake.nix

@@ -55,6 +55,7 @@
           pkgs.treefmt.withConfig {
             runtimeInputs = with pkgs; [
               nixfmt-rfc-style
+              deadnix
               keep-sorted
             ];
             settings = pkgs.lib.importTOML ./treefmt.toml;

modules/programs/obsidian.nix

@@ -187,9 +187,7 @@ in
 
                 corePlugins =
                   let
-                    corePluginsOptions =
+                    corePluginsOptions = {
-                      { config, ... }:
-                      {
                       options = {
                         enable = mkOption {
                           type = types.bool;
@@ -220,9 +218,7 @@ in
 
                 communityPlugins =
                   let
-                    communityPluginsOptions =
+                    communityPluginsOptions = {
-                      { config, ... }:
-                      {
                       options = {
                         enable = mkOption {
                           type = types.bool;
@@ -295,9 +291,7 @@ in
 
                 themes =
                   let
-                    themesOptions =
+                    themesOptions = {
-                      { config, ... }:
-                      {
                       options = {
                         enable = mkOption {
                           type = types.bool;
@@ -320,9 +314,7 @@ in
 
                 hotkeys =
                   let
-                    hotkeysOptions =
+                    hotkeysOptions = {
-                      { config, ... }:
-                      {
                       options = {
                         modifiers = mkOption {
                           type = with types; listOf str;

modules/services/stalonetray.nix

@@ -10,7 +10,6 @@ let
     mkIf
     mkOption
     types
-    literalExpression
     ;
 
   cfg = config.services.stalonetray;

tests/integration/standalone/alice-home-init.nix

@@ -1,5 +1,3 @@
-{ config, pkgs, ... }:
-
 {
   # Home Manager needs a bit of information about you and the paths it should
   # manage.

tests/integration/standalone/home-with-symbols-init.nix

@@ -1,5 +1,3 @@
-{ config, pkgs, ... }:
-
 {
   # Home Manager needs a bit of information about you and the paths it should
   # manage.

tests/modules/programs/helix/only-extraconfig.nix

@@ -1,4 +1,3 @@
-{ config, ... }:
 {
   programs.helix = {
     enable = true;

tests/modules/programs/lutris/empty.nix

@@ -1,4 +1,3 @@
-{ pkgs, lib, ... }:
 {
   programs.lutris.enable = true;
   nmt.script =

tests/modules/programs/mc/basic-configuration.nix

@@ -1,5 +1,3 @@
-{ config, lib, ... }:
-
 {
   programs.mc = {
     enable = true;

treefmt.toml

@@ -5,6 +5,11 @@ tree-root-file = "release.json"
 command = "nixfmt"
 includes = [ "*.nix" ]
 
+[formatter.deadnix]
+command = "deadnix"
+options = [ "--edit", "--no-lambda-arg" ]
+includes = [ "*.nix" ]
+
 [formatter.keep-sorted]
 command = "keep-sorted"
 includes = [ "*" ]