interface ModuleInstallerInterface

interface ModuleInstallerInterface {
    
    /**
     * Installs a given list of modules.
     *
     * Order of events:
     * - Gather and add module dependencies to $module_list (if applicable).
     * - For each module that is being installed:
     *   - Invoke hook_module_preinstall().
     *   - Install module schema and update system registries and caches.
     *   - Invoke hook_install() and add it to the list of installed modules.
     * - Invoke hook_modules_installed().
     *
     * To install test modules add
     * @code
     * $settings['extension_discovery_scan_tests'] = TRUE;
     * @endcode
     * to your settings.php.
     *
     * @param string[] $module_list
     *   An array of module names.
     * @param bool $enable_dependencies
     *   (optional) If TRUE, dependencies will automatically be installed in the
     *   correct order. This incurs a significant performance cost, so use FALSE
     *   if you know $module_list is already complete.
     *
     * @return bool
     *   TRUE if the modules were successfully installed.
     *
     * @throws \Drupal\Core\Extension\MissingDependencyException
     *   Thrown when a requested module, or a dependency of one, can not be found.
     *
     * @see hook_module_preinstall()
     * @see hook_install()
     * @see hook_modules_installed()
     */
    public function install(array $module_list, $enable_dependencies = TRUE);
    
    /**
     * Uninstalls a given list of modules.
     *
     * @param string[] $module_list
     *   The modules to uninstall.
     * @param bool $uninstall_dependents
     *   (optional) If TRUE, dependent modules will automatically be uninstalled
     *   in the correct order. This incurs a significant performance cost, so use
     *   FALSE if you know $module_list is already complete.
     *
     * @return bool
     *   FALSE if one or more dependencies are missing, TRUE otherwise.
     *
     * @see hook_module_preuninstall()
     * @see hook_uninstall()
     * @see hook_modules_uninstalled()
     */
    public function uninstall(array $module_list, $uninstall_dependents = TRUE);
    
    /**
     * Adds module a uninstall validator.
     *
     * @param \Drupal\Core\Extension\ModuleUninstallValidatorInterface $uninstall_validator
     *   The uninstall validator to add.
     */
    public function addUninstallValidator(ModuleUninstallValidatorInterface $uninstall_validator);
    
    /**
     * Determines whether a list of modules can be uninstalled.
     *
     * @param string[] $module_list
     *   An array of module names.
     *
     * @return string[]
     *   An array of reasons the module can not be uninstalled, empty if it can.
     */
    public function validateUninstall(array $module_list);

}