From 2777de38dd20826238712c8fdaac3e960773e43a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebasti=C3=A1n=20Zavala=20Villag=C3=B3mez?=
 <sebaszv@proton.me>
Date: Sun, 24 Nov 2024 08:05:10 -0500
Subject: [PATCH] hyprpaper: fix service when no config file

The systemd user service depends on

  config.xdg.configFile."hypr/hyprpaper.conf".source

for `X-Restart-Triggers`. When `cfg.settings` is the default `{}`,
this causes failure since

  config.xdg.configFile."hypr/hyprpaper.conf".source

will not exist.

Making the addition conditional on `cfg.settings` actually having
content, which would mean `xdg.configFile."hypr/hyprpaper.conf"` does
exist, avoids the error.

(cherry picked from commit bd58a1132e9b7f121f65313bc662ad6c8a05f878)
---
 modules/services/hyprpaper.nix                  |  2 +-
 tests/modules/services/hyprpaper/default.nix    |  5 ++++-
 .../services/hyprpaper/no-configuration.nix     | 17 +++++++++++++++++
 3 files changed, 22 insertions(+), 2 deletions(-)
 create mode 100644 tests/modules/services/hyprpaper/no-configuration.nix

diff --git a/modules/services/hyprpaper.nix b/modules/services/hyprpaper.nix
index ede09b258..6c9ddb2cf 100644
--- a/modules/services/hyprpaper.nix
+++ b/modules/services/hyprpaper.nix
@@ -75,7 +75,7 @@ in {
         Description = "hyprpaper";
         After = [ "graphical-session-pre.target" ];
         PartOf = [ "graphical-session.target" ];
-        X-Restart-Triggers =
+        X-Restart-Triggers = mkIf (cfg.settings != { })
           [ "${config.xdg.configFile."hypr/hyprpaper.conf".source}" ];
       };
 
diff --git a/tests/modules/services/hyprpaper/default.nix b/tests/modules/services/hyprpaper/default.nix
index 2a5abbfed..d3e87df43 100644
--- a/tests/modules/services/hyprpaper/default.nix
+++ b/tests/modules/services/hyprpaper/default.nix
@@ -1 +1,4 @@
-{ hyprpaper-basic-configuration = ./basic-configuration.nix; }
+{
+  hyprpaper-basic-configuration = ./basic-configuration.nix;
+  hyprpaper-no-configuration = ./no-configuration.nix;
+}
diff --git a/tests/modules/services/hyprpaper/no-configuration.nix b/tests/modules/services/hyprpaper/no-configuration.nix
new file mode 100644
index 000000000..15775e886
--- /dev/null
+++ b/tests/modules/services/hyprpaper/no-configuration.nix
@@ -0,0 +1,17 @@
+{ pkgs, ... }:
+
+{
+  services.hyprpaper = {
+    enable = true;
+    settings = { };
+  };
+
+  test.stubs.hyprpaper = { };
+
+  nmt.script = ''
+    config=home-files/.config/hypr/hyprpaper.conf
+    clientServiceFile=home-files/.config/systemd/user/hyprpaper.service
+    assertPathNotExists $config
+    assertFileExists $clientServiceFile
+  '';
+}