From 431ccf26e49eb66d0c229a0dd14d5b8f0f00f455 Mon Sep 17 00:00:00 2001
From: Kerstin Humm <kerstin@erictapen.name>
Date: Thu, 6 Apr 2023 16:12:51 +0200
Subject: [PATCH] nixos/mastodon: add assertion for only allowing one sidekiq
 scheduler queue

---
 nixos/modules/services/web-apps/mastodon.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/nixos/modules/services/web-apps/mastodon.nix b/nixos/modules/services/web-apps/mastodon.nix
index 1b6e1ac583af..73a9a664c090 100644
--- a/nixos/modules/services/web-apps/mastodon.nix
+++ b/nixos/modules/services/web-apps/mastodon.nix
@@ -513,6 +513,13 @@ in {
             <option>services.mastodon.smtp.authenticate</option> is enabled.
         '';
       }
+      {
+        assertion = 1 == builtins.length
+          (lib.mapAttrsToList
+            (_: v: builtins.elem "scheduler" v.jobClasses || v.jobClasses == [ ])
+            cfg.sidekiqProcesses);
+        message = "There must be one and only one Sidekiq queue in services.mastodon.sidekiqProcesses with jobClass \"scheduler\".";
+      }
     ];
 
     environment.systemPackages = [ mastodonTootctl ];