phase 2: promote services/, tests/, patches/, lib/, scripts/

services/harmonia.nix

@@ -0,0 +1,38 @@
+{
+  config,
+  lib,
+  service_configs,
+  ...
+}:
+{
+  imports = [
+    (lib.serviceFilePerms "harmonia" [
+      "Z /run/agenix/harmonia-sign-key 0400 harmonia harmonia"
+    ])
+  ];
+
+  services.harmonia = {
+    enable = true;
+    signKeyPaths = [ config.age.secrets.harmonia-sign-key.path ];
+    settings.bind = "127.0.0.1:${toString service_configs.ports.private.harmonia.port}";
+  };
+
+  # serve latest deploy store paths (unauthenticated — just a path string)
+  # CI writes to /var/lib/dotfiles-deploy/<hostname> after building
+  services.caddy.virtualHosts."nix-cache.${service_configs.https.domain}".extraConfig = ''
+    handle_path /deploy/* {
+        root * /var/lib/dotfiles-deploy
+        file_server
+    }
+
+    handle {
+        import ${config.age.secrets.nix-cache-auth.path}
+        reverse_proxy :${toString service_configs.ports.private.harmonia.port}
+    }
+  '';
+
+  # directory for CI to record latest deploy store paths
+  systemd.tmpfiles.rules = [
+    "d /var/lib/dotfiles-deploy 0755 gitea-runner gitea-runner"
+  ];
+}