From 101b3994a70f2228fa1405502522a8cfa54c5380 Mon Sep 17 00:00:00 2001
From: niten <niten@fudo.org>
Date: Sun, 28 Jul 2024 13:13:04 -0700
Subject: [PATCH] Don't add empty clauses

---
 lib/fudo/prometheus.nix | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/fudo/prometheus.nix b/lib/fudo/prometheus.nix
index 6faacbd..9e42f71 100644
--- a/lib/fudo/prometheus.nix
+++ b/lib/fudo/prometheus.nix
@@ -154,10 +154,11 @@ in {
             honor_labels = false;
             scheme = if secured then "https" else "http";
             metrics_path = path;
-            static_configs =
-              let attachPort = target: "${target}:${toString port}";
-              in [{ targets = map attachPort static-targets; }];
-            dns_sd_configs = [{ names = dns-sd-records; }];
+            static_configs = mkif (static-targets != [ ])
+              (let attachPort = target: "${target}:${toString port}";
+              in [{ targets = map attachPort static-targets; }]);
+            dns_sd_configs =
+              mkIf (dns-sd-records != [ ]) [{ names = dns-sd-records; }];
           };
       in map mkScraper cfg.scrapers;