From 3c334aac29998d1812d1dfff51270683596f310c Mon Sep 17 00:00:00 2001
From: Almamu <wpengine@alma.mu>
Date: Thu, 15 May 2025 22:28:23 +0200
Subject: [PATCH] chore: better error reporting after fix for #300

---
 src/WallpaperEngine/Application/CApplicationContext.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/WallpaperEngine/Application/CApplicationContext.cpp b/src/WallpaperEngine/Application/CApplicationContext.cpp
index e1d8365..34a8ef3 100644
--- a/src/WallpaperEngine/Application/CApplicationContext.cpp
+++ b/src/WallpaperEngine/Application/CApplicationContext.cpp
@@ -257,6 +257,10 @@ CApplicationContext::CApplicationContext (int argc, char* argv []) :
 
     program.parse_known_args (argc, argv);
 
+    if (this->settings.general.defaultBackground.empty ()) {
+        throw std::runtime_error ("No default background specified. Either --bg/-b or <background id> must be specified");
+    }
+
     this->settings.audio.volume = std::max(0, std::min (this->settings.audio.volume, 128));
     this->settings.screenshot.delay = std::max (0, std::min (this->settings.screenshot.delay, 5));