Now I have a better error that's more exact, but I think next level of this is to just show a generic texture for missing ones. Closes #80.

textures.cpp

@@ -5,16 +5,20 @@
 #include "config.hpp"
 #include "constants.hpp"
 #include <memory>
+#include <filesystem>
 
 namespace textures {
   using std::shared_ptr, std::make_shared, nlohmann::json, std::string;
+  namespace fs = std::filesystem;
 
   static TextureManager TMGR;
   static bool initialized = false;
 
   void load_sprite_textures(SpriteTextureMap &mapping, json &config, bool smooth) {
     for(auto& [name, settings] : config.items()) {
-      auto texture = make_shared<sf::Texture>(settings["path"]);
+      const string& path = settings["path"];
+      dbc::check(fs::exists(path), fmt::format("texture at {} doesn't exist", path));
+      auto texture = make_shared<sf::Texture>(path);
 
       texture->setSmooth(smooth);
       auto sprite = make_shared<sf::Sprite>(*texture);