From 684c3efc04711d4b352f0e10dd9543c61acc7a16 Mon Sep 17 00:00:00 2001
From: Sam Atkins <atkinssj@serenityos.org>
Date: Mon, 12 Sep 2022 16:12:50 +0100
Subject: [PATCH] StateMachineGenerator: Port to LibMain and Core::Stream

---
 .../StateMachineGenerator/CMakeLists.txt        |  2 +-
 .../StateMachineGenerator/main.cpp              | 17 +++++++----------
 2 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/Meta/Lagom/Tools/CodeGenerators/StateMachineGenerator/CMakeLists.txt b/Meta/Lagom/Tools/CodeGenerators/StateMachineGenerator/CMakeLists.txt
index 98fafd84cc..7b02a71de0 100644
--- a/Meta/Lagom/Tools/CodeGenerators/StateMachineGenerator/CMakeLists.txt
+++ b/Meta/Lagom/Tools/CodeGenerators/StateMachineGenerator/CMakeLists.txt
@@ -2,4 +2,4 @@ set(SOURCES
     main.cpp
 )
 
-lagom_tool(StateMachineGenerator)
+lagom_tool(StateMachineGenerator LIBS LibMain)
diff --git a/Meta/Lagom/Tools/CodeGenerators/StateMachineGenerator/main.cpp b/Meta/Lagom/Tools/CodeGenerators/StateMachineGenerator/main.cpp
index 6651764d0e..c7609d2abe 100644
--- a/Meta/Lagom/Tools/CodeGenerators/StateMachineGenerator/main.cpp
+++ b/Meta/Lagom/Tools/CodeGenerators/StateMachineGenerator/main.cpp
@@ -12,7 +12,8 @@
 #include <AK/StringBuilder.h>
 #include <AK/Types.h>
 #include <LibCore/ArgsParser.h>
-#include <LibCore/File.h>
+#include <LibCore/Stream.h>
+#include <LibMain/Main.h>
 #include <ctype.h>
 
 struct Range {
@@ -213,19 +214,15 @@ parse_state_machine(StringView input)
 
 void output_header(StateMachine const&, SourceGenerator&);
 
-int main(int argc, char** argv)
+ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
     Core::ArgsParser args_parser;
-    char const* path = nullptr;
+    StringView path;
     args_parser.add_positional_argument(path, "Path to parser description", "input", Core::ArgsParser::Required::Yes);
-    args_parser.parse(argc, argv);
+    args_parser.parse(arguments);
 
-    auto file_or_error = Core::File::open(path, Core::OpenMode::ReadOnly);
-    if (file_or_error.is_error()) {
-        fprintf(stderr, "Cannot open %s\n", path);
-    }
-
-    auto content = file_or_error.value()->read_all();
+    auto file = TRY(Core::Stream::File::open(path, Core::Stream::OpenMode::Read));
+    auto content = TRY(file->read_all());
     auto state_machine = parse_state_machine(content);
 
     StringBuilder builder;