From b36ce740dd228ffadac42f17c1181901f25bc5c5 Mon Sep 17 00:00:00 2001
From: Martin Fischer <martin@push-f.com>
Date: Wed, 27 Aug 2025 21:16:06 +0200
Subject: deps: update prometheus-sql-exporter

---
 nixos/shared/prometheus-sql-exporter/service.nix | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'nixos/shared/prometheus-sql-exporter/service.nix')

diff --git a/nixos/shared/prometheus-sql-exporter/service.nix b/nixos/shared/prometheus-sql-exporter/service.nix
index a887f91..a79528c 100644
--- a/nixos/shared/prometheus-sql-exporter/service.nix
+++ b/nixos/shared/prometheus-sql-exporter/service.nix
@@ -4,7 +4,16 @@
 let
   sqlExporter = pkgs.callPackage ./default.nix {};
   cfg = config.services.prometheus-sql-exporter;
-  configFile =  builtins.toFile "config.yaml" (builtins.toJSON cfg.config);
+  configFile = builtins.toFile "config.yaml" (builtins.toJSON cfg.config);
+  validateConfig = file:
+    pkgs.runCommand "validate-config"
+      {
+        nativeBuildInputs = [sqlExporter];
+      }
+      ''
+        sql_exporter -config.check -config.file "${file}"
+        ln -s "${file}" "$out"
+      '';
 in
 {
   options.services.prometheus-sql-exporter = {
@@ -20,7 +29,7 @@ in
   config = lib.mkIf cfg.enable {
     systemd.services.prometheus-sql-exporter = {
       serviceConfig = {
-        ExecStart = "${sqlExporter}/bin/sql_exporter -config.file ${configFile} -web.listen-address :${toString cfg.port}";
+        ExecStart = "${sqlExporter}/bin/sql_exporter -config.file ${validateConfig configFile} -web.listen-address :${toString cfg.port}";
         DynamicUser = "true";
         User = "prometheus-sql-exporter";
       };
-- 
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