From 973cb0a49e30d7fbecda82026e91b199e8ecb36d Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Tue, 23 Nov 2021 23:45:55 +0100
Subject: [PATCH] Calculator: Port to LibMain :^)

---
 .../Applications/Calculator/CMakeLists.txt    |  2 +-
 Userland/Applications/Calculator/main.cpp     | 28 ++++++-------------
 2 files changed, 10 insertions(+), 20 deletions(-)

diff --git a/Userland/Applications/Calculator/CMakeLists.txt b/Userland/Applications/Calculator/CMakeLists.txt
index 31d4d842be..74a3d9a58c 100644
--- a/Userland/Applications/Calculator/CMakeLists.txt
+++ b/Userland/Applications/Calculator/CMakeLists.txt
@@ -15,4 +15,4 @@ set(SOURCES
 )
 
 serenity_app(Calculator ICON app-calculator)
-target_link_libraries(Calculator LibGUI)
+target_link_libraries(Calculator LibGUI LibMain)
diff --git a/Userland/Applications/Calculator/main.cpp b/Userland/Applications/Calculator/main.cpp
index bf7d34a358..2ebc65f157 100644
--- a/Userland/Applications/Calculator/main.cpp
+++ b/Userland/Applications/Calculator/main.cpp
@@ -5,6 +5,7 @@
  */
 
 #include "CalculatorWidget.h"
+#include <LibCore/System.h>
 #include <LibGUI/Action.h>
 #include <LibGUI/Application.h>
 #include <LibGUI/Clipboard.h>
@@ -13,33 +14,22 @@
 #include <LibGUI/Menubar.h>
 #include <LibGUI/Window.h>
 #include <LibGfx/Bitmap.h>
+#include <LibMain/Main.h>
 #include <stdio.h>
 #include <unistd.h>
 
-int main(int argc, char** argv)
+ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
-    if (pledge("stdio recvfd sendfd rpath unix", nullptr) < 0) {
-        perror("pledge");
-        return 1;
-    }
+    TRY(Core::System::pledge("stdio recvfd sendfd rpath unix", nullptr));
+    auto app = TRY(GUI::Application::try_create(arguments));
 
-    auto app = GUI::Application::construct(argc, argv);
-
-    if (pledge("stdio recvfd sendfd rpath", nullptr) < 0) {
-        perror("pledge");
-        return 1;
-    }
-
-    if (unveil("/res", "r") < 0) {
-        perror("unveil");
-        return 1;
-    }
-
-    unveil(nullptr, nullptr);
+    TRY(Core::System::pledge("stdio recvfd sendfd rpath", nullptr));
+    TRY(Core::System::unveil("/res", "r"));
+    TRY(Core::System::unveil(nullptr, nullptr));
 
     auto app_icon = GUI::Icon::default_icon("app-calculator");
 
-    auto window = GUI::Window::construct();
+    auto window = TRY(GUI::Window::try_create());
     window->set_title("Calculator");
     window->set_resizable(false);
     window->resize(250, 215);