alacritty: don't create file if settings is empty

Also add a few test cases for the alacritty module.

1 files changed, 8 insertions, 5 deletions

diff --git a/modules/programs/alacritty.nix b/modules/programs/alacritty.nix
index a4e5e6056d6..84675cb1c8a 100644
--- a/modules/programs/alacritty.nix
+++ b/modules/programs/alacritty.nix
@@ -41,10 +41,13 @@ in
     };
   };
 
-  config = mkIf cfg.enable {
-    home.packages = [ pkgs.alacritty ];
+  config = mkMerge [
+    (mkIf cfg.enable {
+      home.packages = [ pkgs.alacritty ];
 
-    xdg.configFile."alacritty/alacritty.yml".text =
-      replaceStrings ["\\\\"] ["\\"] (builtins.toJSON cfg.settings);
-  };
+      xdg.configFile."alacritty/alacritty.yml" = mkIf (cfg.settings != {}) {
+        text = replaceStrings ["\\\\"] ["\\"] (builtins.toJSON cfg.settings);
+      };
+    })
+  ];
 }