CliArgs.hpp

#pragma once
 
#include "migration/MigrationApplication.hpp"
#include "util/OverloadSet.hpp"
 
#include <string>
#include <variant>
 
namespace app {

class CliArgs {
public:
    static constexpr char kDefaultConfigPath[] = "/etc/opt/clio/config.json";

    class Action {
    public:
        struct Run {
            std::string configPath;  
            bool useNgWebServer;     
        };

        struct Exit {
            int exitCode;  
        };

        struct Migrate {
            std::string configPath;
            MigrateSubCmd subCmd;
        };

        struct VerifyConfig {
            std::string configPath;
        };

        template <typename ActionType>
            requires std::is_same_v<ActionType, Run> or std::is_same_v<ActionType, Exit> or
            std::is_same_v<ActionType, Migrate> or std::is_same_v<ActionType, VerifyConfig>
        explicit Action(ActionType&& action) : action_(std::forward<ActionType>(action))
        {
        }

        template <typename... Processors>
        int
        apply(Processors&&... processors) const
        {
            return std::visit(util::OverloadSet{std::forward<Processors>(processors)...}, action_);
        }
 
    private:
        std::variant<Run, Exit, Migrate, VerifyConfig> action_;
    };

    static Action
    parse(int argc, char const* argv[]);
};
 
}  // namespace app