tealdeer: add module

.github/CODEOWNERS

@@ -245,6 +245,8 @@
 
 /modules/programs/starship.nix                        @marsam
 
+/modules/programs/tealdeer.nix                        @marsam
+
 /modules/programs/terminator.nix                      @chisui
 
 /modules/programs/texlive.nix                         @rycee

modules/modules.nix

@@ -149,6 +149,7 @@ let
     ./programs/ssh.nix
     ./programs/starship.nix
     ./programs/taskwarrior.nix
+    ./programs/tealdeer.nix
     ./programs/terminator.nix
     ./programs/termite.nix
     ./programs/texlive.nix

modules/programs/tealdeer.nix

@@ -0,0 +1,53 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+let
+  cfg = config.programs.tealdeer;
+
+  tomlFormat = pkgs.formats.toml { };
+
+  configDir = if pkgs.stdenv.isDarwin then
+    "Library/Application Support"
+  else
+    config.xdg.configHome;
+
+in {
+  meta.maintainers = [ maintainers.marsam ];
+
+  options.programs.tealdeer = {
+    enable = mkEnableOption "Tealdeer";
+
+    settings = mkOption {
+      type = tomlFormat.type;
+      default = { };
+      defaultText = literalExpression "{ }";
+      example = literalExpression ''
+        {
+          display = {
+            compact = false;
+            use_pager = true;
+          };
+          updates = {
+            auto_update = false;
+          };
+        };
+      '';
+      description = ''
+        Configuration written to
+        <filename>$XDG_CONFIG_HOME/tealdeer/config.toml</filename> on Linux or
+        <filename>$HOME/Library/Application Support/tealdeer/config.toml</filename>
+        on Darwin. See
+        <link xlink:href="https://dbrgn.github.io/tealdeer/config.html"/>
+        for more information.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = [ pkgs.tealdeer ];
+
+    home.file."${configDir}/tealdeer/config.toml" = mkIf (cfg.settings != { }) {
+      source = tomlFormat.generate "tealdeer-config" cfg.settings;
+    };
+  };
+}