fix(grfn/mugwump): Update for new ddclient config format

There's a passwordFile option now!

Change-Id: I7aa21891c3502ceddcb0bb08a83a5a3a8a6bcdc9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5025
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI

users/grfn/secrets/ddclient-password.age

@@ -0,0 +1,9 @@
+age-encryption.org/v1
+-> ssh-ed25519 CpJBgQ 1Yw1EllkiG38qEQ03eN1p8WzC74zKb6YIuZMb3RD0ik
+P7iAo2rCex8XkCyWKjTSecAZDg5wokrfBLRk/Nl479w
+-> ssh-ed25519 LfBFbQ /cMWDtN+SlCs7WsomkngPpPK/4RHpCDZr2bg+jyqHEs
+bgnNTXhxYtW84twA7ty9RWgycABW0MI9OEk69TRT2ro
+-> Ujl-grease l_8cO.F
+pw/kCMvXCg4my4M
+--- m3jMrTCJFA1bGgKERiAhAYvXt/++wWzva0CVdtz3cgQ
+]>'C[›*€*új¥!³¶`™7»<ü
ŸQäƒø míIÑ7tGW ŒÏ³;ç{Ja‘Õnˆpúòð–ש`b‡tÓÖ

users/grfn/secrets/secrets.nix

@@ -7,4 +7,5 @@ in
 {
   "bbbg.age".publicKeys = [ grfn mugwump bbbg ];
   "cloudflare.age".publicKeys = [ grfn mugwump ];
+  "ddclient-password.age".publicKeys = [ grfn mugwump ];
 }

users/grfn/system/system/machines/mugwump.nix

@@ -71,6 +71,7 @@ with lib;
   in {
     bbbg.file = secret "bbbg";
     cloudflare.file = secret "cloudflare";
+    ddclient-password.file = secret "ddclient-password";
   };
 
   services.depot.auto-deploy = {
@@ -137,25 +138,10 @@ with lib;
     zone = "gws.fyi";
     protocol = "cloudflare";
     username = "root@gws.fyi";
+    passwordFile = "/run/agenix/ddclient-password";
     quiet = true;
   };
 
-  systemd.services.ddclient.serviceConfig = {
-    EnvironmentFile = "/run/agenix/cloudflare";
-    DynamicUser = lib.mkForce false;
-    ExecStart = lib.mkForce (
-      let runtimeDir =
-            config.systemd.services.ddclient.serviceConfig.RuntimeDirectory;
-      in pkgs.writeShellScript "ddclient" ''
-        set -eo pipefail
-
-        ${pkgs.gnused}/bin/sed -i -s s/password=/password=$CLOUDFLARE_API_KEY/ /run/${runtimeDir}/ddclient.conf
-        exec ${pkgs.ddclient}/bin/ddclient \
-          -file /run/${runtimeDir}/ddclient.conf \
-          -login=$CLOUDFLARE_EMAIL \
-      '');
-  };
-
   security.acme.certs."metrics.gws.fyi" = {
     dnsProvider = "cloudflare";
     credentialsFile = "/run/agenix/cloudflare";