From 2f1dfb0db379c1bf13785a5c7d94ad31bd0eb46b Mon Sep 17 00:00:00 2001
From: Maximilian Bosch <maximilian@mbosch.me>
Date: Tue, 8 Nov 2022 20:04:23 +0100
Subject: [PATCH] nixos/grafana: fix w/o datasources or dashboard provisioning

---
 nixos/modules/services/monitoring/grafana.nix | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/nixos/modules/services/monitoring/grafana.nix b/nixos/modules/services/monitoring/grafana.nix
index 69a25731f243..8035abfc0044 100644
--- a/nixos/modules/services/monitoring/grafana.nix
+++ b/nixos/modules/services/monitoring/grafana.nix
@@ -13,9 +13,20 @@ let
   settingsFormatIni = pkgs.formats.ini {};
   configFile = settingsFormatIni.generate "config.ini" cfg.settings;
 
-  datasourceFile = if (cfg.provision.datasources.path == null) then provisioningSettingsFormat.generate "datasource.yaml" cfg.provision.datasources.settings else cfg.provision.datasources.path;
+  mkProvisionCfg = name: attr: provisionCfg:
+    if provisionCfg.path != null
+      then provisionCfg.path
+    else
+      provisioningSettingsFormat.generate "${name}.yaml"
+        (if provisionCfg.settings != null
+          then provisionCfg.settings
+          else {
+            apiVersion = 1;
+            ${attr} = [];
+          });
 
-  dashboardFile = if (cfg.provision.dashboards.path == null) then provisioningSettingsFormat.generate "dashboard.yaml" cfg.provision.dashboards.settings else cfg.provision.dashboards.path;
+  datasourceFile = mkProvisionCfg "datasource" "datasources" cfg.provision.datasources;
+  dashboardFile = mkProvisionCfg "dashboard" "providers" cfg.provision.dashboards;
 
   notifierConfiguration = {
     apiVersion = 1;