eza: add theme option (#6850)

modules/programs/eza.nix

@@ -6,6 +6,7 @@
 }:
 let
   inherit (lib) mkOption optionalAttrs types;
+  yamlFormat = pkgs.formats.yaml { };
 in
 {
   imports =
@@ -102,6 +103,16 @@ in
     };
 
     package = lib.mkPackageOption pkgs "eza" { nullable = true; };
+
+    theme = mkOption {
+      type = yamlFormat.type;
+      default = { };
+      description = ''
+        Written to {file}`$XDG_CONFIG_HOME/eza/theme.yml`
+
+        See <https://github.com/eza-community/eza#custom-themes>
+      '';
+    };
   };
 
   config =
@@ -146,6 +157,10 @@ in
 
       home.packages = lib.mkIf (cfg.package != null) [ cfg.package ];
 
+      xdg.configFile."eza/theme.yml" = lib.mkIf (cfg.theme != { }) {
+        source = yamlFormat.generate "eza-theme" cfg.theme;
+      };
+
       programs.bash.shellAliases = optionsAlias // optionalAttrs cfg.enableBashIntegration aliases;
 
       programs.zsh.shellAliases = optionsAlias // optionalAttrs cfg.enableZshIntegration aliases;