bat: add module

modules/misc/news.nix

@@ -998,6 +998,13 @@ in
           A new service is available: 'services.mpdris2'.
         '';
       }
+
+      {
+        time = "2019-03-19T22:56:20+00:00";
+        message = ''
+          A new module is available: 'programs.bat'.
+        '';
+      }
     ];
   };
 }

modules/modules.nix

@@ -38,6 +38,7 @@ let
     (loadModule ./programs/astroid.nix { })
     (loadModule ./programs/autorandr.nix { })
     (loadModule ./programs/bash.nix { })
+    (loadModule ./programs/bat.nix { })
     (loadModule ./programs/beets.nix { })
     (loadModule ./programs/browserpass.nix { })
     (loadModule ./programs/chromium.nix { condition = hostPlatform.isLinux; })

modules/programs/bat.nix

@@ -0,0 +1,40 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.programs.bat;
+
+in
+
+{
+  meta.maintainers = [ maintainers.marsam ];
+
+  options.programs.bat = {
+    enable = mkEnableOption "bat, a cat clone with wings";
+
+    config = mkOption {
+      type = types.attrsOf types.str;
+      default = {};
+      example = {
+        theme = "TwoDark";
+        pager = "less -FR";
+      };
+      description = ''
+        Bat configuration.
+      '';
+    };
+
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = [ pkgs.bat ];
+
+    xdg.configFile."bat/config" = mkIf (cfg.config != {}) {
+      text = concatStringsSep "\n" (
+        mapAttrsToList (n: v: ''--${n}="${v}"'') cfg.config
+      );
+    };
+  };
+}