farmOS/modules/farm/farm_access/farm_access.install

<?php
/**
 * @file
 * Farm Access install file.
 */

/**
 * Implements hook_install().
 */
function farm_access_install() {

  // Create farm roles.
  farm_access_roles_create();
}

/**
 * Synchronize all available farm role permissions.
 */
function farm_access_enable() {

  // Sync permissions.
  farm_access_sync_perms();
}

/**
 * Implements hook_uninstall().
 */
function farm_access_uninstall() {

  // Delete the farm roles provided by this module.
  $roles = farm_access_farm_access_roles();
  foreach ($roles as $name) {
    user_role_delete($name);
  }

  // Clean up variables.
  variable_del('farm_access_allow_origin');
}

/**
 * Enable the Farm Access Roles module.
 */
function farm_access_update_7000(&$sandbox) {
  $module = 'farm_access_roles';
  if (!module_exists($module)) {
    module_enable(array($module));
  }
}