From 9ee85857168f3165d5dda214107101e17d30e73a Mon Sep 17 00:00:00 2001
From: clerie <git@clerie.de>
Date: Mon, 6 Feb 2023 12:20:59 +0100
Subject: [PATCH] Replace lib/hosts.nix with an injected special argument
 containing the nix flake

---
 flake.nix                         |  8 ++++++++
 hosts/monitoring-3/prometheus.nix |  4 ++--
 lib/hosts.nix                     | 26 --------------------------
 3 files changed, 10 insertions(+), 28 deletions(-)
 delete mode 100644 lib/hosts.nix

diff --git a/flake.nix b/flake.nix
index 6ee58f4..dd9e7d3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -19,6 +19,14 @@
       generateNixosSystem = name: nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         modules = [
+          ({ ... }: {
+            /*
+              Make the contents of the flake availiable to modules.
+              Useful for having the monitoring server scraping the
+              target config from all other servers automatically.
+            */
+            _module.args._nixfiles = self;
+          })
           ./configuration/common
           ({ ... }: {
             nixpkgs.overlays = [
diff --git a/hosts/monitoring-3/prometheus.nix b/hosts/monitoring-3/prometheus.nix
index cf83db8..15a1f1a 100644
--- a/hosts/monitoring-3/prometheus.nix
+++ b/hosts/monitoring-3/prometheus.nix
@@ -1,9 +1,9 @@
-{ config, pkgs, lib, ... }:
+{ config, pkgs, lib, _nixfiles, ... }:
 
 with lib;
 
 let
-  hosts = (import ../../lib/hosts.nix { inherit pkgs; }).hosts;
+  hosts = _nixfiles.nixosConfigurations;
 
   monitoringHosts = filterAttrs (name: host:
     attrByPath ["clerie" "monitoring" "enable"] false host.config)
diff --git a/lib/hosts.nix b/lib/hosts.nix
deleted file mode 100644
index b0e26d3..0000000
--- a/lib/hosts.nix
+++ /dev/null
@@ -1,26 +0,0 @@
-{ pkgs ? import ../pkgs {} }:
-
-with pkgs.lib;
-
-rec {
-  hostsDir = ../hosts;
-
-  hostNames = attrNames (
-    filterAttrs (
-      name: type: type == "directory"
-    ) (
-      builtins.readDir hostsDir
-    )
-  );
-
-  hosts = listToAttrs (
-    map (
-      hostName: nameValuePair hostName (
-        import (pkgs.path + "/nixos") {
-          configuration = import (hostsDir + "/${hostName}/configuration.nix");
-          system = "x86_64-linux";
-        }
-      )
-    ) hostNames
-  );
-}