From 5ebe26caf857f0f0a05e9bb5fed453c48fd14044 Mon Sep 17 00:00:00 2001
From: clerie <git@clerie.de>
Date: Sat, 20 Apr 2024 14:34:42 +0200
Subject: [PATCH] lib/clerie-monitoring-ids.nix: Add functions to analyse
 assigned monitoring ids

---
 flake.nix                     |  2 ++
 lib/clerie-monitoring-ids.nix | 13 +++++++++++++
 lib/default.nix               |  1 +
 3 files changed, 16 insertions(+)
 create mode 100644 lib/clerie-monitoring-ids.nix

diff --git a/flake.nix b/flake.nix
index d7699a0..810a4ab 100644
--- a/flake.nix
+++ b/flake.nix
@@ -134,6 +134,8 @@
         uptimestatus;
     });
 
+    inherit lib self;
+
     hydraJobs = {
       inherit (self)
         packages;
diff --git a/lib/clerie-monitoring-ids.nix b/lib/clerie-monitoring-ids.nix
new file mode 100644
index 0000000..fe3f64a
--- /dev/null
+++ b/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);
+}
diff --git a/lib/default.nix b/lib/default.nix
index ba58fa5..d43387f 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -14,6 +14,7 @@ let
       generateColmenaHost
       mapToColmenaHosts
       buildHosts;
+    clerie-monitoring-ids = callLibs ./clerie-monitoring-ids.nix;
   };
 
 in