From 3e48fd26be3ce365f84ebb4229fc3bbc7ed0ead5 Mon Sep 17 00:00:00 2001
From: arcnmx <git@git.arcn.mx>
Date: Sat, 7 Sep 2024 15:45:53 -0700
Subject: [PATCH] chore(gatus): assert unique names at eval time

---
 modules/nixos/gatus.nix | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/modules/nixos/gatus.nix b/modules/nixos/gatus.nix
index 09ee55ee..e0ce437a 100644
--- a/modules/nixos/gatus.nix
+++ b/modules/nixos/gatus.nix
@@ -4,7 +4,11 @@
   pkgs,
   ...
 }: let
-  inherit (lib) types mkIf mkOption mkEnableOption mkPackageOption mkOptionDefault;
+  inherit (lib.options) mkOption mkEnableOption mkPackageOption;
+  inherit (lib.modules) mkIf mkOptionDefault;
+  inherit (lib.attrsets) attrValues;
+  inherit (lib.lists) length unique;
+  inherit (lib) types;
 
   cfg = config.services.gatus;
 
@@ -364,6 +368,14 @@ in {
         isSystemUser = true;
       };
     };
+    assertions = let
+      endpointNames = map (endpoint: endpoint.name) (attrValues cfg.settings.endpoints);
+    in [
+      {
+        assertion = length (unique endpointNames) == length endpointNames;
+        message = "Gatus endpoint names must be unique";
+      }
+    ];
   };
 
   meta.maintainers = with lib.maintainers; [christoph-heiss];