From 31b704802a57a1eb0cf780421028b8915aff0bee Mon Sep 17 00:00:00 2001
From: Felix Stupp <felix.stupp@banananet.work>
Date: Mon, 26 Aug 2024 00:43:33 +0000
Subject: [PATCH] NixOS: add setting services.printing.enableAutoDiscovery

---
 nix/nixos-modules/extends/default.nix  |  1 +
 nix/nixos-modules/extends/printing.nix | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 nix/nixos-modules/extends/printing.nix

diff --git a/nix/nixos-modules/extends/default.nix b/nix/nixos-modules/extends/default.nix
index b8c77b1..6ddee2c 100644
--- a/nix/nixos-modules/extends/default.nix
+++ b/nix/nixos-modules/extends/default.nix
@@ -2,5 +2,6 @@
   imports = [
     # files
     ./podman.nix
+    ./printing.nix
   ];
 }
diff --git a/nix/nixos-modules/extends/printing.nix b/nix/nixos-modules/extends/printing.nix
new file mode 100644
index 0000000..0b66a6b
--- /dev/null
+++ b/nix/nixos-modules/extends/printing.nix
@@ -0,0 +1,25 @@
+{ config, lib, ... }:
+let
+  cfg = config.services.printing;
+in
+{
+
+  options.services.printing = {
+    enableAutoDiscovery = lib.mkEnableOption ''
+      CUPS automatic discovery of printers.
+
+      This will enable & configure Avahi accordingly,
+      including opening ports in the firewall'';
+  };
+
+  config = lib.mkIf cfg.enable {
+    # TODO make also possible with systemd-resolved
+    services.avahi = lib.mkIf cfg.enableAutoDiscovery {
+      enable = true;
+      nssmdns4 = true;
+      nssmdns6 = true;
+      openFirewall = true;
+    };
+  };
+
+}