From 258e3e3bac906d93799657ada84b1fc83464eacc Mon Sep 17 00:00:00 2001
From: Wael Nasreddine <wael.nasreddine@gmail.com>
Date: Sat, 30 Aug 2025 10:49:12 -0700
Subject: [PATCH] ncps: Add support for the --prometheus-enabled flag

(cherry picked from commit a0817f37f23f077e53fe14bc5589bdeb00e558ab)
---
 nixos/modules/services/networking/ncps.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/nixos/modules/services/networking/ncps.nix b/nixos/modules/services/networking/ncps.nix
index d29a24445ae7..77d1a77c4889 100644
--- a/nixos/modules/services/networking/ncps.nix
+++ b/nixos/modules/services/networking/ncps.nix
@@ -27,6 +27,9 @@ let
         cfg.openTelemetry.grpcURL != null
       ) "--otel-grpc-url='${cfg.openTelemetry.grpcURL}'")
     ))
+    ++ (lib.optionals cfg.prometheus.enable [
+      "--prometheus-enabled"
+    ])
   );
 
   serveFlags = lib.concatStringsSep " " (
@@ -76,6 +79,8 @@ in
         };
       };
 
+      prometheus.enable = lib.mkEnableOption "Enable Prometheus metrics endpoint at /metrics";
+
       logLevel = lib.mkOption {
         type = lib.types.enum logLevels;
         default = "info";