add an abstraction over location

1 files changed, 24 insertions, 0 deletions

diff --git a/nixos/modules/location.nix b/nixos/modules/location.nix
new file mode 100644
index 0000000..a99aaa7
--- /dev/null
+++ b/nixos/modules/location.nix
@@ -0,0 +1,24 @@
+{ config, lib, pkgs, ... }:
+with lib;
+
+let
+  cfg = config.eth;
+
+  locations = {
+    London = {
+      latitude = 51.5074;
+      longitude = 0.1278;
+    };
+  };
+
+in {
+  options.eth.location = mkOption {
+    type = types.nullOr (types.enum (builtins.attrNames locations));
+    default = null;
+    description = "City name.";
+  };
+
+  config = mkIf (cfg.location != null) {
+    location = locations.${cfg.location};
+  };
+}