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// ============================================================= //
// NeBuild
// PURPOSE: JSON build support.
// Copyright (C) 2024-2026, Amlal El Mahrouss and NeKernel Authors, licensed under BSD-3 license.
// ============================================================= //
#include <NeBuildKit/JSONManifestBuilder.h>
#include <json/json.h>
#include <fstream>
namespace NeBuild {
namespace FS = std::filesystem;
/// =========================================================== ///
/// @brief Builds a nlohmann::json target from a nlohmann::json file.
/// @param arg_sz filename size (must be 1 or greater).
/// @param arg_val filename path (must be a valid nlohmann::json file).
/// @return bool: whether the build has succeeded or not.
/// =========================================================== ///
bool JSONManifestBuilder::BuildTarget(BuildConfig& config) {
std::string path;
if (config.path_.empty()) {
NeBuild::Logger::info() << "error: file path is empty" << std::endl;
return false;
} else {
path = config.path_;
if (!FS::exists(path)) {
NeBuild::Logger::info() << "error: file '" << path << "' does not exist"
<< std::endl;
return false;
}
}
try {
std::ifstream json(path);
if (!json.good()) {
NeBuild::Logger::info() << "error: file '" << path
<< "' is not a valid nlohmann::json" << std::endl;
return false;
}
nlohmann::json json_obj = nlohmann::json::parse(json);
try {
nlohmann::json description = json_obj["description"];
NeBuild::Logger::info() << "package path: " << path << std::endl;
if (auto res = description.get<std::string>(); !res.empty())
NeBuild::Logger::info() << "description: " << res << std::endl;
} catch (...) {}
std::string compiler = json_obj["compiler_path"].get<std::string>();
std::string command = compiler + " ";
nlohmann::json header_search_path = json_obj["compiler_headers_path"];
for (auto& headers : header_search_path) {
command += "-I" + headers.get<std::string>() + " ";
}
nlohmann::json headers_path = json_obj["headers_path"];
for (auto& headers : headers_path) {
command += "-I" + headers.get<std::string>() + " ";
}
nlohmann::json sources_files = json_obj["sources_path"];
for (auto& sources : sources_files) {
command += sources.get<std::string>() + " ";
}
nlohmann::json macros_list = json_obj["cpp_macros"];
for (auto& macro : macros_list) {
command += "-D" + macro.get<std::string>() + " ";
}
nlohmann::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>();
NeBuild::Logger::info() << "output path: " << target << "\n";
auto ret_exec = std::system(command.c_str());
if (ret_exec > 0) {
NeBuild::Logger::info() << "error: exit with message: " << std::strerror(ret_exec) << ""
<< std::endl;
config.has_failed_ = true;
return false;
}
} catch (const std::exception& err) {
NeBuild::Logger::info() << "error: exit with message: " << err.what() << "" << std::endl;
config.has_failed_ = true;
return false;
}
return true;
}
/// =========================================================== ///
/// @brief Returns the build system name.
/// =========================================================== ///
const std::string_view JSONManifestBuilder::BuildSystem() {
return "NeBuild (nlohmann::json)";
}
} // namespace NeBuild
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