From 6b04b535c16f347dd7fb5cd9f9c31fe7e24ea6bf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vili=20Sinerv=C3=A4?= <vili.m.sinerva@gmail.com>
Date: Thu, 6 Jun 2024 22:16:29 +0300
Subject: [PATCH] Add conditionals and assertions

---
 desktop.nix                        | 7 +++++++
 hardware-specific/amd-laptop.nix   | 2 +-
 hardware-specific/keychron-q11.nix | 2 +-
 hardware-specific/trackball.nix    | 7 +++++++
 services/game-streaming.nix        | 7 +++++++
 services/redshift.nix              | 6 ++++++
 services/vaultwarden.nix           | 2 +-
 7 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/desktop.nix b/desktop.nix
index ef8cac5..6633470 100644
--- a/desktop.nix
+++ b/desktop.nix
@@ -451,6 +451,13 @@ let
   ''}";
 in
 {
+  assertions = [
+    {
+      assertion = config.users.users ? "vili";
+      message = "User 'vili' needed for desktop!";
+    }
+  ];
+
   environment.systemPackages = with pkgs; [
     i3status
     rofi
diff --git a/hardware-specific/amd-laptop.nix b/hardware-specific/amd-laptop.nix
index 9ebcbb1..b25bc9d 100644
--- a/hardware-specific/amd-laptop.nix
+++ b/hardware-specific/amd-laptop.nix
@@ -8,7 +8,7 @@
   boot.initrd.kernelModules = [ "amdgpu" ];
 
   services = {
-    xserver = {
+    xserver = pkgs.lib.mkIf config.services.xserver.enable {
       videoDrivers = [
         "amdgpu"
         "modesetting"
diff --git a/hardware-specific/keychron-q11.nix b/hardware-specific/keychron-q11.nix
index d1571c5..d8bb8d7 100644
--- a/hardware-specific/keychron-q11.nix
+++ b/hardware-specific/keychron-q11.nix
@@ -1,7 +1,7 @@
 # Config for Keychron Q11 keyboard
 { config, pkgs, ... }:
 {
-  environment.systemPackages = with pkgs; [ via ];
+  environment.systemPackages = with pkgs; if config.services.xserver.enable then [ via ] else [ ];
 
   # Keychron Q11
   services.udev.extraRules = ''
diff --git a/hardware-specific/trackball.nix b/hardware-specific/trackball.nix
index 115305d..7b7b63a 100644
--- a/hardware-specific/trackball.nix
+++ b/hardware-specific/trackball.nix
@@ -1,6 +1,13 @@
 # Config for my Logitech trackball
 { config, pkgs, ... }:
 {
+  assertions = [
+    {
+      assertion = config.services.xserver.enable;
+      message = "Trackball does not work without a desktop!";
+    }
+  ];
+
   disabledModules = [ "services/hardware/libinput.nix" ];
 
   nixpkgs.overlays = [
diff --git a/services/game-streaming.nix b/services/game-streaming.nix
index 385a399..4a9bdc1 100644
--- a/services/game-streaming.nix
+++ b/services/game-streaming.nix
@@ -1,6 +1,13 @@
 # Game streaming software (and possibly services in future)
 { config, pkgs, ... }:
 {
+  assertions = [
+    {
+      assertion = config.services.xserver.enable;
+      message = "Game streaming does not work without a desktop!";
+    }
+  ];
+
   environment.systemPackages = with pkgs; [
     moonlight-qt
     parsec-bin
diff --git a/services/redshift.nix b/services/redshift.nix
index d013455..12a9aa8 100644
--- a/services/redshift.nix
+++ b/services/redshift.nix
@@ -1,6 +1,12 @@
 # Redshift bluelight reducer
 { config, pkgs, ... }:
 {
+  assertions = [
+    {
+      assertion = config.services.xserver.enable;
+      message = "Redshift does not work without a desktop!";
+    }
+  ];
   services = {
     redshift = {
       executable = "/bin/redshift-gtk";
diff --git a/services/vaultwarden.nix b/services/vaultwarden.nix
index a9f6b46..96a4e2c 100644
--- a/services/vaultwarden.nix
+++ b/services/vaultwarden.nix
@@ -1,4 +1,4 @@
-# Nextcloud instance
+# Vaultwarden instance
 { config, pkgs, ... }:
 {
   networking.firewall.allowedTCPPorts = [