refactor(temperature): check if file exist on init

include/modules/temperature.hpp

@@ -4,6 +4,11 @@
 #include <fstream>
 #include "util/sleeper_thread.hpp"
 #include "ALabel.hpp"
+#ifdef FILESYSTEM_EXPERIMENTAL
+#include <experimental/filesystem>
+#else
+#include <filesystem>
+#endif
 
 namespace waybar::modules {
 

src/modules/temperature.cpp

@@ -10,7 +10,13 @@ waybar::modules::Temperature::Temperature(const std::string& id, const Json::Val
       config_["thermal-zone"].isInt() ? config_["thermal-zone"].asInt() : 0;
     file_path_ = fmt::format("/sys/class/thermal/thermal_zone{}/temp", zone);
   }
-
+#ifdef FILESYSTEM_EXPERIMENTAL
+  if (!std::experimental::filesystem::exists(file_path_)) {
+#else
+  if (!std::filesystem::exists(file_path_)) {
+#endif
+    throw std::runtime_error("Can't open " + file_path_);
+  }
   label_.set_name("temperature");
   if (!id.empty()) {
     label_.get_style_context()->add_class(id);