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// This source code is released into the public domain.
export module nihil.config:write;
import nihil.std;
import nihil.error;
import nihil.monad;
import nihil.posix;
import nihil.ucl;
import :option;
import :store;
namespace nihil::config {
// Write all config values (except defaults) to disk.
export [[nodiscard]] auto
write_to(std::filesystem::path const &filename) -> std::expected<void, error>
{
auto uclconfig = ucl::map<ucl::object>();
// Add all the options to the UCL object.
for (auto const &option : store::get().all()) {
if (option->is_default())
continue;
auto uobj = co_await option->ucl();
uclconfig.insert({option->name(), uobj});
}
auto ucl_text = std::format("{:c}", uclconfig);
co_await safe_write_file(filename, ucl_text);
co_return {};
}
}; // namespace nihil::config
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