Utilities: Add GLSL compiler command line utility

Userland/Utilities/CMakeLists.txt

@@ -92,6 +92,7 @@ target_link_libraries(expr PRIVATE LibRegex)
 target_link_libraries(fdtdump PRIVATE LibDeviceTree)
 target_link_libraries(file PRIVATE LibGfx LibIPC LibArchive LibCompress LibAudio)
 target_link_libraries(functrace PRIVATE LibDebug LibX86)
+target_link_libraries(glsl-compiler PRIVATE LibGLSL)
 target_link_libraries(gml-format PRIVATE LibGUI)
 target_link_libraries(grep PRIVATE LibFileSystem LibRegex)
 target_link_libraries(gunzip PRIVATE LibCompress)

Userland/Utilities/glsl-compiler.cpp

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2021-2022, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibCore/ArgsParser.h>
+#include <LibCore/File.h>
+#include <LibGLSL/Parser.h>
+#include <LibMain/Main.h>
+
+ErrorOr<int> serenity_main(Main::Arguments arguments)
+{
+   Core::ArgsParser args_parser;
+   StringView path;
+   bool print_tokens = false;
+   args_parser.add_option(print_tokens, "Print Tokens", "tokens", 't');
+   args_parser.add_positional_argument(path, "Input file", "input-file", Core::ArgsParser::Required::Yes);
+   args_parser.parse(arguments);
+
+   if (path.is_empty())
+       return 1;
+
+   auto file = TRY(Core::File::open(path, Core::File::OpenMode::Read));
+   auto content = TRY(file->read_until_eof());
+   StringView content_view(content);
+
+   GLSL::Preprocessor preprocessor(path, content_view);
+   auto tokens = preprocessor.process_and_lex();
+
+   GLSL::Parser parser(tokens, path);
+   if (print_tokens)
+       parser.print_tokens();
+   auto root = parser.parse();
+
+   dbgln("Parser errors:");
+   for (auto& error : parser.errors()) {
+       dbgln("{}", error);
+   }
+
+   root->dump();
+
+   return 0;
+}