drupal_module__munin_api/munin_api.install

<?php
// $Id$
/**
 * @file
 * Munin API for Drupal: installation and runtime checks.
 *
 * @author Frederic G. MARAND
 *
 * @copyright (c) 2011 Ouest Systèmes Informatiques
 *
 * Licensed under the General Public License version 2 or later.
 */

/**
 * Implements hook_requirements().
 */
function munin_api_requirements($phase) {
  $ret = array();
  if ($phase == 'runtime') {
    $count = count(module_implements('munin_api_info'));
    switch ($count) {
      case 0:
        $req = array(
          'title' => t('Munin plugin modules'),
          'value' => t('No plugin found'),
          'description' => t('Munin API is enabled, but does not find any plugin, including the one built into the API.'),
          'severity' => REQUIREMENT_ERROR,
          );
        break;

      case 1:
        $req = array(
          'title' => t('Munin plugin modules'),
          'value' => t('No Munin plugin module enabled beyond API'),
          'description' => t('Munin API is enabled, but no plugin module is enabled to report to it except the one built within the API. You should either <a href="!link">enable some plugin modules</a> or <a href="!link">disable and uninstall Munin API</a>.', array(
            '!link' => url('admin/build/modules'),
          )),
          'severity' => REQUIREMENT_INFO,
        );
        break;

      default:
        $req = array(
          'title' => t('Munin plugin modules'),
          // format plural although $count >= 2 because some languages have several plural forms
          'value' => format_plural($count, '1 Munin plugin enabled.',
            '<a href="!link">@count Munin plugins</a> enabled.', array('!link' => url('admin/reports/munin_api'))),
          'severity' => REQUIREMENT_OK,
        );
    }
    $ret[] = $req;
  }
  elseif ($phase != 'install') {
    // This should never happen and points to a severe error somewhere
    watchdog('munin_api', 'Invalid phase %phase passed to %function', array(
      '%phase' => $phase,
      '%function' => __FUNCTION__,
    ), WATCHDOG_ERROR);
  }
  // else $phase == 'install', nothing to do.

  return $ret;
}

/**
 * Implements hook_uninstall()
 */
function munin_api_uninstall() {
  $vars = array(
    'init_path',
    'last',
    'next_report',
    'watchdog',
  );
  foreach ($vars as $tail) {
    $name = 'munin_api_'. $tail;
    variable_del($name);
  }
}