module_manager.h

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#pragma once
 
#include <filesystem>
#include <memory>
#include <string>
#include <unordered_set>
 
class module;
 
using ModulePtr = std::shared_ptr<module>;
using ModulesList = std::unordered_set<ModulePtr>;
 
class module_manager
{
public:
  ~module_manager();
 
  static std::shared_ptr<module_manager> create(
    const std::string &module_search_path,
    const std::string &main_module_path);

  const ModulePtr get_module(const std::string &module_name);
 
private:
  module_manager(const std::string &path);
  void load();

  const ModulePtr find_module(const std::string &module_name) const;

  bool hydrate(const ModulePtr &mod);
 
  void load_directory(
    const std::filesystem::path &current_path,
    ModulePtr parent_module = nullptr);
 
  ModulePtr get_module_from_dir(
    const std::filesystem::path &path,
    ModulePtr parent_module);
 
  std::string module_search_path_;
  std::string main_module_;
  ModulesList modules_;

  unsigned discovered_ = 0;
  unsigned parsed_ = 0;
};