From 94b05b143762e436e6f5342ce12d899cf5a26ba2 Mon Sep 17 00:00:00 2001
From: Lucas Bergman <lucas@bergmans.us>
Date: Tue, 20 Feb 2024 07:58:03 -0600
Subject: [PATCH] maint: NixOS module writes config to the Nix store

Instead of writing the config attrset to a YAML file to a fixed path in /etc,
this makes the NixOS module write to a (content-addressed) config file in the
Nix store. We just use builtins.toJSON since YAML is a superset of JSON.
---
 flake.nix | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/flake.nix b/flake.nix
index 245c5b1..86b27e7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -112,11 +112,9 @@
 
         config = let
           cfg = config.services.heracles;
+          cfgFile = pkgs.writeText "heracles.yaml" (builtins.toJSON cfg.settings);
         in
           lib.mkIf cfg.enable {
-            environment.etc."heracles.yaml" = {
-              text = lib.generators.toYAML {} cfg.settings;
-            };
             systemd.services.heracles = {
               wantedBy = ["multi-user.target" "default.target"];
               wants = ["network.target"];
@@ -124,7 +122,7 @@
               serviceConfig = {
                 Restart = "on-failure";
                 RestartSec = "30s";
-                ExecStart = "${pkgs.heracles}/bin/heracles --listen ${cfg.listen} --config=${config.environment.etc."heracles.yaml".target}";
+                ExecStart = "${pkgs.heracles}/bin/heracles --listen ${cfg.listen} --config=${cfgFile}";
               };
             };
           };