lib/clerie-monitoring-ids.nix: Add functions to analyse assigned monitoring ids

flake.nix

@@ -134,6 +134,8 @@
         uptimestatus;
     });
 
+    inherit lib self;
+
     hydraJobs = {
       inherit (self)
         packages;

lib/clerie-monitoring-ids.nix

@@ -0,0 +1,13 @@
+inputs:
+
+with inputs.nixpkgs.lib;
+
+rec {
+  monitoringIdForHost = host: let
+    evalResult = builtins.tryEval (attrByPath [ "clerie" "monitoring" "id" ] null host.config);
+  in
+    if evalResult.success then evalResult.value else null;
+  monitoringIdsByHost = hosts: filterAttrs (name: id: id != null) (mapAttrs (name: host: monitoringIdForHost host) hosts);
+  hostsByMonitoringIds = hosts: mapAttrs' (name: id: nameValuePair id name) (monitoringIdsByHost hosts);
+  monitoringIds =  hosts: attrNames (hostsByMonitoringIds hosts);
+}

lib/default.nix

@@ -14,6 +14,7 @@ let
       generateColmenaHost
       mapToColmenaHosts
       buildHosts;
+    clerie-monitoring-ids = callLibs ./clerie-monitoring-ids.nix;
   };
 
 in