From fafb6657c138d725948412481b4720aff0e13863 Mon Sep 17 00:00:00 2001
From: Joachim Fasting <joachifm@fastmail.fm>
Date: Sat, 10 Dec 2016 13:12:20 +0100
Subject: [PATCH] syslogd service: assert conflict with rsyslogd

Enabling both these at the same time fails because they implement the
same interface.
---
 nixos/modules/services/logging/syslogd.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/nixos/modules/services/logging/syslogd.nix b/nixos/modules/services/logging/syslogd.nix
index a0f8e89fa69..fe0b0490811 100644
--- a/nixos/modules/services/logging/syslogd.nix
+++ b/nixos/modules/services/logging/syslogd.nix
@@ -100,6 +100,12 @@ in
 
   config = mkIf cfg.enable {
 
+    assertions =
+      [ { assertion = !config.services.rsyslogd.enable;
+          message = "rsyslogd conflicts with syslogd";
+        }
+      ];
+
     environment.systemPackages = [ pkgs.sysklogd ];
 
     services.syslogd.extraParams = optional cfg.enableNetworkInput "-r";