add github_runner

modules/nixos/services/gh/default.nix

@@ -0,0 +1,32 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+with lib;
+with lib.custom; let
+  cfg = config.services.gh;
+
+  sec = config.age.secrets;
+  group = config.services.github-runner.runnerGroup;
+in {
+  options.services.gh = with types; {
+    enable = mkBoolOpt false "Enable GitHub Actions Runner";
+  };
+
+  config = mkIf cfg.enable {
+    age.secrets = {
+      github_runner = {
+        file = ./sec/github_runner.age;
+        group = group;
+      };
+    };
+
+    services.github-runner = {
+      enable = true;
+      url = "https://github.com/zackartz/nixos-dots";
+      tokenFile = sec.github_runner.path;
+    };
+  };
+}