Add ntp

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/system/configs/ntp/default.nix

@@ -0,0 +1,4 @@
+{ ... }:
+{
+  services.ntp.enable = true;
+}

hosts/common/system/configs/timezone/default.nix

@@ -0,0 +1,14 @@
+{ lib, pkgs, ... }:
+{
+  networking.networkmanager.dispatcherScripts = [
+    {
+      source = lib.meta.getExe (
+        pkgs.writeShellApplication {
+          name = "timezone-sync";
+          runtimeInputs = with pkgs; [ curl ];
+          text = builtins.readFile ./timezone.sh;
+        }
+      );
+    }
+  ];
+}

hosts/common/system/configs/timezone/timezone.sh

@@ -0,0 +1,7 @@
+case "$2" in
+  connectivity-change)
+    if timezone=$(curl --fail https://ipapi.co/timezone); then
+      timedatectl set-timezone "$timezone"
+    fi
+    ;;
+esac