refactor: format && better output management

src/main.cpp

@@ -2,31 +2,26 @@
 #include <iostream>
 #include "client.hpp"
 
-namespace waybar {
-
-static Client* client;
-
-}  // namespace waybar
-
 int main(int argc, char* argv[]) {
   try {
-    waybar::Client c(argc, argv);
-    waybar::client = &c;
+    auto client = waybar::Client::inst();
     std::signal(SIGUSR1, [](int /*signal*/) {
-      for (auto& bar : waybar::client->bars) {
+      for (auto& bar : waybar::Client::inst()->bars) {
         bar->toggle();
       }
     });
 
     for (int sig = SIGRTMIN + 1; sig <= SIGRTMAX; ++sig) {
-      std::signal(sig, [](int sig /*signal*/) {
-        for (auto& bar : waybar::client->bars) {
+      std::signal(sig, [](int sig) {
+        for (auto& bar : waybar::Client::inst()->bars) {
           bar->handleSignal(sig);
         }
       });
     }
 
-    return c.main(argc, argv);
+    auto ret = client->main(argc, argv);
+    delete client;
+    return ret;
   } catch (const std::exception& e) {
     std::cerr << e.what() << std::endl;
     return 1;