1 files changed, 152 insertions, 0 deletions
diff --git a/src/JSONManifestBuilder.cc b/src/JSONManifestBuilder.cc
new file mode 100644
index 0000000..e5db6b8
--- /dev/null
+++ b/src/JSONManifestBuilder.cc
@@ -0,0 +1,152 @@
+// ============================================================= //
+//  btb
+// Copyright ZKA Web Services.
+// ============================================================= //
+
+#include <JSONManifestBuilder.h>
+#include <json.h>
+
+#include <sstream>
+#include <iostream>
+#include <fstream>
+
+using JSON = nlohmann::json;
+
+/// @brief Builds a JSON target from a JSON file.
+/// @param arg_sz filename size (must be 1 or greater).
+/// @param arg_val filename path (must be a valid JSON file).
+/// @retval true succeeded building.
+/// @retval false failed to build.
+bool JSONManifestBuilder::Build(int arg_sz, const char* arg_val)
+{
+	std::string path;
+
+	if (arg_sz < 0)
+	{
+		return false;
+	}
+	else
+	{
+		path = arg_val;
+
+		if (!std::filesystem::exists(path))
+		{
+			std::cout << "btb: error: file '" << path << "' does not exist." << std::endl;
+			return false;
+		}
+	}
+
+	try
+	{
+		std::ifstream json(path);
+
+		if (!json.good())
+		{
+			return false;
+		}
+
+		JSON json_obj = JSON::parse(json);
+
+		std::string compiler = json_obj["compiler_path"].get<std::string>();
+
+		JSON header_search_path = json_obj["headers_path"];
+		JSON sources_files		= json_obj["sources_path"];
+
+		std::string command = compiler + " ";
+
+		for (auto& sources : sources_files)
+		{
+			command += sources.get<std::string>() + " ";
+		}
+
+		for (auto& headers : header_search_path)
+		{
+			command += "-I" + headers.get<std::string>() + " ";
+		}
+
+		JSON macros_list = json_obj["cpp_macros"];
+
+		for (auto& macro : macros_list)
+		{
+			command += "-D" + macro.get<std::string>() + " ";
+		}
+
+		JSON compiler_flags = json_obj["compiler_flags"];
+
+		for (auto& flag : compiler_flags)
+		{
+			command += flag.get<std::string>() + " ";
+		}
+
+		if (json_obj["compiler_std"].is_string())
+			command += "-std=" + json_obj["compiler_std"].get<std::string>() + " ";
+
+		command += "-o " + json_obj["output_name"].get<std::string>();
+
+		auto target = json_obj["output_name"].get<std::string>();
+
+		std::cout << "btb: output path: " << target << "\n";
+		std::cout << "btb: command: " << command << "\n";
+
+		std::system(command.c_str());
+
+		try
+		{
+			if (json_obj["run_after_build"].get<bool>())
+			{
+				if (target.ends_with(".so") ||
+					target.ends_with(".dll"))
+				{
+					std::cout << "btb: error: can't open DLL/SO, it mayn't contain an entrypoint." << std::endl;
+					return true;
+				}
+				else if (target.ends_with(".dll"))
+				{
+					auto			  file = std::ifstream(target);
+					std::stringstream ss;
+					ss << file.rdbuf();
+
+					if (ss.str()[0] == 'J' &&
+						ss.str()[1] == 'o' &&
+						ss.str()[2] == 'y' &&
+						ss.str()[3] == '!')
+						std::cout << "btb: error: can't open Joy! DLL, it maynt't contain an entrypoint." << std::endl;
+					else if (ss.str()[0] == '!' &&
+							 ss.str()[1] == 'y' &&
+							 ss.str()[2] == 'o' &&
+							 ss.str()[3] == 'J')
+						std::cout << "btb: error: can't open !yoJ DLL, it maynt't contain an entrypoint." << std::endl;
+					else if (ss.str()[0] == 'M' &&
+							 ss.str()[1] == 'Z')
+						std::cout << "btb: error: can't open MZ DLL, it maynt't contain an entrypoint." << std::endl;
+					else if (ss.str()[0] == 0x7F &&
+							 ss.str()[1] == 'E')
+					{
+						std::cout << "btb: error: can't open ELF DLL, it maynt't contain an entrypoint." << std::endl;
+					}
+
+					return true;
+				}
+
+#ifdef _WIN32
+				std::system((".\\" + target).c_str());
+#else
+				std::system(("./" + target).c_str());
+#endif
+			}
+		}
+		catch (...)
+		{
+			return true;
+		}
+	}
+	catch (std::runtime_error& err)
+	{
+		std::cout << "btb: error: " << err.what() << std::endl;
+		perror("btb");
+
+		return false;
+	}
+
+	return true;
+}