system.install 36.4 KB
Newer Older
Dries's avatar
 
Dries committed
1
<?php
2

3 4 5 6
/**
 * @file
 * Install, update and uninstall functions for the system module.
 */
7

8
use Drupal\Component\Utility\Crypt;
9
use Drupal\Component\Utility\Environment;
10 11
use Drupal\Core\Database\Database;
use Drupal\Core\Language\Language;
12
use Drupal\Core\Site\Settings;
13
use Drupal\Core\StreamWrapper\PublicStream;
14

15
/**
16
 * Implements hook_requirements().
17 18 19 20 21 22 23
 */
function system_requirements($phase) {
  $requirements = array();

  // Report Drupal version
  if ($phase == 'runtime') {
    $requirements['drupal'] = array(
24
      'title' => t('Drupal'),
25
      'value' => \Drupal::VERSION,
Steven Wittens's avatar
Steven Wittens committed
26 27
      'severity' => REQUIREMENT_INFO,
      'weight' => -10,
28
    );
29

30 31
    // Display the currently active installation profile, if the site
    // is not running the default installation profile.
32
    $profile = drupal_get_profile();
33
    if ($profile != 'standard') {
34
      $info = system_get_info('module', $profile);
35
      $requirements['install_profile'] = array(
36 37
        'title' => t('Installation profile'),
        'value' => t('%profile_name (%profile-%version)', array(
38 39 40 41 42 43 44
          '%profile_name' => $info['name'],
          '%profile' => $profile,
          '%version' => $info['version']
        )),
        'severity' => REQUIREMENT_INFO,
        'weight' => -9
      );
45
    }
46 47
  }

48
  // Web server information.
49
  $software = \Drupal::request()->server->get('SERVER_SOFTWARE');
50
  $requirements['webserver'] = array(
51
    'title' => t('Web server'),
Steven Wittens's avatar
Steven Wittens committed
52
    'value' => $software,
53 54
  );

55 56 57 58
  // Test PHP version and show link to phpinfo() if it's available
  $phpversion = phpversion();
  if (function_exists('phpinfo')) {
    $requirements['php'] = array(
59 60
      'title' => t('PHP'),
      'value' => ($phase == 'runtime') ? $phpversion .' ('. l(t('more information'), 'admin/reports/status/php') .')' : $phpversion,
61 62 63 64
    );
  }
  else {
    $requirements['php'] = array(
65
      'title' => t('PHP'),
66
      'value' => $phpversion,
67
      'description' => t('The phpinfo() function has been disabled for security reasons. To see your server\'s phpinfo() information, change your PHP settings or contact your server administrator. For more information, <a href="@phpinfo">Enabling and disabling phpinfo()</a> handbook page.', array('@phpinfo' => 'http://drupal.org/node/243993')),
68 69 70 71 72
      'severity' => REQUIREMENT_INFO,
    );
  }

  if (version_compare($phpversion, DRUPAL_MINIMUM_PHP) < 0) {
73
    $requirements['php']['description'] = t('Your PHP installation is too old. Drupal requires at least PHP %version.', array('%version' => DRUPAL_MINIMUM_PHP));
74
    $requirements['php']['severity'] = REQUIREMENT_ERROR;
75 76
    // If PHP is old, it's not safe to continue with the requirements check.
    return $requirements;
77
  }
78

79 80
  // Test for PHP extensions.
  $requirements['php_extensions'] = array(
81
    'title' => t('PHP extensions'),
82
  );
83 84 85 86 87

  $missing_extensions = array();
  $required_extensions = array(
    'date',
    'dom',
88
    'fileinfo',
89 90 91 92 93 94 95 96 97
    'filter',
    'gd',
    'hash',
    'json',
    'pcre',
    'pdo',
    'session',
    'SimpleXML',
    'SPL',
98
    'tokenizer',
99 100 101 102 103 104 105 106 107
    'xml',
  );
  foreach ($required_extensions as $extension) {
    if (!extension_loaded($extension)) {
      $missing_extensions[] = $extension;
    }
  }

  if (!empty($missing_extensions)) {
108
    $description = t('Drupal requires you to enable the PHP extensions in the following list (see the <a href="@system_requirements">system requirements page</a> for more information):', array(
109 110 111
      '@system_requirements' => 'http://drupal.org/requirements',
    ));

112 113 114 115 116
    $item_list = array(
      '#theme' => 'item_list',
      '#items' => $missing_extensions,
    );
    $description .= drupal_render($item_list);
117

118
    $requirements['php_extensions']['value'] = t('Disabled');
119 120
    $requirements['php_extensions']['severity'] = REQUIREMENT_ERROR;
    $requirements['php_extensions']['description'] = $description;
121 122
  }
  else {
123
    $requirements['php_extensions']['value'] = t('Enabled');
124
  }
125

126 127 128
  if ($phase == 'install' || $phase == 'update') {
    // Test for PDO (database).
    $requirements['database_extensions'] = array(
129
      'title' => t('Database support'),
130
    );
131

132
    // Make sure PDO is available.
133
    $database_ok = extension_loaded('pdo');
134
    if (!$database_ok) {
135
      $pdo_message = t('Your web server does not appear to support PDO (PHP Data Objects). Ask your hosting provider if they support the native PDO extension. See the <a href="@link">system requirements</a> page for more information.', array(
136 137 138 139 140
        '@link' => 'http://drupal.org/requirements/pdo',
      ));
    }
    else {
      // Make sure at least one supported database driver exists.
141
      $drivers = drupal_detect_database_types();
142 143
      if (empty($drivers)) {
        $database_ok = FALSE;
144
        $pdo_message = t('Your web server does not appear to support any common PDO database extensions. Check with your hosting provider to see if they support PDO (PHP Data Objects) and offer any databases that <a href="@drupal-databases">Drupal supports</a>.', array(
145 146 147 148 149 150 151
          '@drupal-databases' => 'http://drupal.org/node/270#database',
        ));
      }
      // Make sure the native PDO extension is available, not the older PEAR
      // version. (See install_verify_pdo() for details.)
      if (!defined('PDO::ATTR_DEFAULT_FETCH_MODE')) {
        $database_ok = FALSE;
152
        $pdo_message = t('Your web server seems to have the wrong version of PDO installed. Drupal requires the PDO extension from PHP core. This system has the older PECL version. See the <a href="@link">system requirements</a> page for more information.', array(
153 154 155
          '@link' => 'http://drupal.org/requirements/pdo#pecl',
        ));
      }
156
    }
157

158
    if (!$database_ok) {
159
      $requirements['database_extensions']['value'] = t('Disabled');
160
      $requirements['database_extensions']['severity'] = REQUIREMENT_ERROR;
161
      $requirements['database_extensions']['description'] = $pdo_message;
162 163
    }
    else {
164
      $requirements['database_extensions']['value'] = t('Enabled');
165
    }
166
  }
167 168
  else {
    // Database information.
169
    $class = Database::getConnection()->getDriverClass('Install\\Tasks');
170 171
    $tasks = new $class();
    $requirements['database_system'] = array(
172
      'title' => t('Database system'),
173 174 175
      'value' => $tasks->name(),
    );
    $requirements['database_system_version'] = array(
176
      'title' => t('Database system version'),
177 178 179
      'value' => Database::getConnection()->version(),
    );
  }
180

181
  // Test PHP memory_limit
182
  $memory_limit = ini_get('memory_limit');
183
  $requirements['php_memory_limit'] = array(
184
    'title' => t('PHP memory limit'),
185
    'value' => $memory_limit == -1 ? t('-1 (Unlimited)') : $memory_limit,
186
  );
187

188
  if (!Environment::checkMemoryLimit(DRUPAL_MINIMUM_PHP_MEMORY_LIMIT, $memory_limit)) {
189 190
    $description = '';
    if ($phase == 'install') {
191
      $description = t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the installation process.', array('%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT));
192 193
    }
    elseif ($phase == 'update') {
194
      $description = t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the update process.', array('%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT));
195
    }
196
    elseif ($phase == 'runtime') {
197
      $description = t('Depending on your configuration, Drupal can run with a %memory_limit PHP memory limit. However, a %memory_minimum_limit PHP memory limit or above is recommended, especially if your site uses additional custom or contributed modules.', array('%memory_limit' => $memory_limit, '%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT));
198
    }
199

200 201
    if (!empty($description)) {
      if ($php_ini_path = get_cfg_var('cfg_file_path')) {
202
        $description .= ' ' . t('Increase the memory limit by editing the memory_limit parameter in the file %configuration-file and then restart your web server (or contact your system administrator or hosting provider for assistance).', array('%configuration-file' => $php_ini_path));
203 204
      }
      else {
205
        $description .= ' ' . t('Contact your system administrator or hosting provider for assistance with increasing your PHP memory limit.');
206
      }
207

208
      $requirements['php_memory_limit']['description'] = $description . ' ' . t('For more information, see the online handbook entry for <a href="@memory-limit">increasing the PHP memory limit</a>.', array('@memory-limit' => 'http://drupal.org/node/207036'));
209
      $requirements['php_memory_limit']['severity'] = REQUIREMENT_WARNING;
210
    }
211
  }
212

213
  // Test configuration files and directory for writability.
214
  if ($phase == 'runtime') {
215 216 217
    $conf_errors = array();
    $conf_path = conf_path();
    if (!drupal_verify_install_file($conf_path, FILE_NOT_WRITABLE, 'dir')) {
218
      $conf_errors[] = t("The directory %file is not protected from modifications and poses a security risk. You must change the directory's permissions to be non-writable.", array('%file' => $conf_path));
219 220 221 222
    }
    foreach (array('settings.php', 'settings.local.php') as $conf_file) {
      $full_path = $conf_path . '/' . $conf_file;
      if (file_exists($full_path) && !drupal_verify_install_file($full_path, FILE_EXIST|FILE_READABLE|FILE_NOT_WRITABLE)) {
223
        $conf_errors[] = t("The file %file is not protected from modifications and poses a security risk. You must change the file's permissions to be non-writable.", array('%file' => $full_path));
224 225 226 227 228 229 230
      }
    }
    if (!empty($conf_errors)) {
      if (count($conf_errors) == 1) {
        $description = $conf_errors[0];
      }
      else {
231 232 233 234 235
        $item_list = array(
          '#theme' => 'item_list',
          '#items' => $conf_errors,
        );
        $description = drupal_render($item_list);
236
      }
237
      $requirements['settings.php'] = array(
238
        'value' => t('Not protected'),
239
        'severity' => REQUIREMENT_ERROR,
240
        'description' => $description,
241 242 243 244
      );
    }
    else {
      $requirements['settings.php'] = array(
245
        'value' => t('Protected'),
246 247
      );
    }
248
    $requirements['settings.php']['title'] = t('Configuration files');
249 250
  }

251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283
  // Test the contents of the .htaccess files.
  if ($phase == 'runtime') {
    // Try to write the .htaccess files first, to prevent false alarms in case
    // (for example) the /tmp directory was wiped.
    file_ensure_htaccess();
    $htaccess_files['public://.htaccess'] = array(
      'title' => t('Public files directory'),
      'directory' => drupal_realpath('public://'),
    );
    if (\Drupal::config('system.file')->get('path.private')) {
      $htaccess_files['private://.htaccess'] = array(
        'title' => t('Private files directory'),
        'directory' => drupal_realpath('private://'),
      );
    }
    $htaccess_files['temporary://.htaccess'] = array(
      'title' => t('Temporary files directory'),
      'directory' => drupal_realpath('temporary://'),
    );
    foreach ($htaccess_files as $htaccess_file => $info) {
      // Check for the string which was added to the recommended .htaccess file
      // in the latest security update.
      if (!file_exists($htaccess_file) || !($contents = @file_get_contents($htaccess_file)) || strpos($contents, 'Drupal_Security_Do_Not_Remove_See_SA_2013_003') === FALSE) {
        $requirements[$htaccess_file] = array(
          'title' => $info['title'],
          'value' => t('Not fully protected'),
          'severity' => REQUIREMENT_ERROR,
          'description' => t('See <a href="@url">@url</a> for information about the recommended .htaccess file which should be added to the %directory directory to help protect against arbitrary code execution.', array('@url' => 'http://drupal.org/SA-CORE-2013-003', '%directory' => $info['directory'])),
        );
      }
    }
  }

284
  // Report cron status.
285
  if ($phase == 'runtime') {
286
    $cron_config = \Drupal::config('system.cron');
287
    // Cron warning threshold defaults to two days.
288
    $threshold_warning = $cron_config->get('threshold.requirements_warning');
289
    // Cron error threshold defaults to two weeks.
290
    $threshold_error = $cron_config->get('threshold.requirements_error');
291
    // Cron configuration help text.
292
    $help = t('For more information, see the online handbook entry for <a href="@cron-handbook">configuring cron jobs</a>.', array('@cron-handbook' => 'http://drupal.org/cron'));
293

294
    // Determine when cron last ran.
295
    $cron_last = \Drupal::state()->get('system.cron_last');
296
    if (!is_numeric($cron_last)) {
297
      $cron_last = \Drupal::state()->get('install_time', 0);
298
    }
299

300
    // Determine severity based on time since cron last ran.
301
    $severity = REQUIREMENT_INFO;
302
    if (REQUEST_TIME - $cron_last > $threshold_error) {
303
      $severity = REQUIREMENT_ERROR;
304
    }
305
    elseif (REQUEST_TIME - $cron_last > $threshold_warning) {
306 307 308 309
      $severity = REQUIREMENT_WARNING;
    }

    // Set summary and description based on values determined above.
310
    $summary = t('Last run !time ago', array('!time' => format_interval(REQUEST_TIME - $cron_last)));
311
    $description = '';
312
    if ($severity != REQUIREMENT_INFO) {
313
      $description = t('Cron has not run recently.') . ' ' . $help;
314
    }
315

316
    $description .= ' ' . t('You can <a href="@cron">run cron manually</a>.', array('@cron' => url('admin/reports/status/run-cron')));
317
    $description .= '<br />' . t('To run cron from outside the site, go to <a href="!cron">!cron</a>', array('!cron' => url('cron/' . \Drupal::state()->get('system.cron_key'), array('absolute' => TRUE))));
318

319
    $requirements['cron'] = array(
320
      'title' => t('Cron maintenance tasks'),
321 322
      'severity' => $severity,
      'value' => $summary,
323
      'description' => $description
324
    );
325
  }
326
  if ($phase != 'install') {
327
    $filesystem_config = \Drupal::config('system.file');
328
    $directories = array(
329
      PublicStream::basePath(),
330 331 332 333 334 335
      // By default no private files directory is configured. For private files
      // to be secure the admin needs to provide a path outside the webroot.
      $filesystem_config->get('path.private'),
      file_directory_temp(),
    );
  }
336

337 338
  // During an install we need to make assumptions about the file system
  // unless overrides are provided in settings.php.
339
  if ($phase == 'install') {
340
    $directories = array();
341
    if ($file_public_path = Settings::get('file_public_path')) {
342
      $directories[] = $file_public_path;
343 344 345
    }
    else {
      // If we are installing Drupal, the settings.php file might not exist yet
346 347
      // in the intended site directory, so don't require it.
      $directories[] = conf_path(FALSE) . '/files';
348
    }
349 350
    if (!empty($GLOBALS['config']['system.file']['path']['private'])) {
      $directories[] = $GLOBALS['config']['system.file']['path']['private'];
351
    }
352 353
    if (!empty($GLOBALS['config']['system.file']['path']['temporary'])) {
      $directories[] = $GLOBALS['config']['system.file']['path']['temporary'];
354 355 356 357 358 359
    }
    else {
      // If the temporary directory is not overridden use an appropriate
      // temporary path for the system.
      $directories[] = file_directory_os_temp();
    }
360 361
  }

362 363 364
  // Check the config directory if it is defined in settings.php. If it isn't
  // defined, the installer will create a valid config directory later, but
  // during runtime we must always display an error.
365 366 367
  if (!empty($GLOBALS['config_directories'])) {
    $directories[] = config_get_config_directory(CONFIG_ACTIVE_DIRECTORY);
    $directories[] = config_get_config_directory(CONFIG_STAGING_DIRECTORY);
368 369
  }
  elseif ($phase != 'install') {
370
    $requirements['config directories'] = array(
371 372 373
      'title' => t('Configuration directories'),
      'value' => t('Not present'),
      'description' => t('Your %file file must define the $config_directories variable as an array containing the name of a directories in which configuration files can be written.', array('%file' => conf_path() . '/settings.php')),
374 375 376 377
      'severity' => REQUIREMENT_ERROR,
    );
  }

378
  $requirements['file system'] = array(
379
    'title' => t('File system'),
380
  );
381

382 383 384
  $error = '';
  // For installer, create the directories if possible.
  foreach ($directories as $directory) {
385 386 387
    if (!$directory) {
      continue;
    }
388
    if ($phase == 'install') {
389
      file_prepare_directory($directory, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS);
390
    }
391 392 393 394
    $is_writable = is_writable($directory);
    $is_directory = is_dir($directory);
    if (!$is_writable || !$is_directory) {
      $description = '';
395
      $requirements['file system']['value'] = t('Not writable');
396
      if (!$is_directory) {
397
        $error .= t('The directory %directory does not exist.', array('%directory' => $directory)) . ' ';
398 399
      }
      else {
400
        $error .= t('The directory %directory is not writable.', array('%directory' => $directory)) . ' ';
401 402 403
      }
      // The files directory requirement check is done only during install and runtime.
      if ($phase == 'runtime') {
404
        $description = $error . t('You may need to set the correct directory at the <a href="@admin-file-system">file system settings page</a> or change the current directory\'s permissions so that it is writable.', array('@admin-file-system' => url('admin/config/media/file-system')));
405 406 407 408
      }
      elseif ($phase == 'install') {
        // For the installer UI, we need different wording. 'value' will
        // be treated as version, so provide none there.
409
        $description = $error . t('An automated attempt to create this directory failed, possibly due to a permissions problem. To proceed with the installation, either create the directory and modify its permissions manually or ensure that the installer has the permissions to create it automatically. For more information, see INSTALL.txt or the <a href="@handbook_url">online handbook</a>.', array('@handbook_url' => 'http://drupal.org/server-permissions'));
410 411 412 413 414 415
        $requirements['file system']['value'] = '';
      }
      if (!empty($description)) {
        $requirements['file system']['description'] = $description;
        $requirements['file system']['severity'] = REQUIREMENT_ERROR;
      }
416 417
    }
    else {
418 419 420
      // This function can be called before the config_cache table has been
      // created.
      if ($phase == 'install' || file_default_scheme() == 'public') {
421
        $requirements['file system']['value'] = t('Writable (<em>public</em> download method)');
422 423
      }
      else {
424
        $requirements['file system']['value'] = t('Writable (<em>private</em> download method)');
425
      }
426 427 428
    }
  }

429 430 431
  // See if updates are available in update.php.
  if ($phase == 'runtime') {
    $requirements['update'] = array(
432 433
      'title' => t('Database updates'),
      'value' => t('Up to date'),
434 435 436
    );

    // Check installed modules.
437
    foreach (\Drupal::moduleHandler()->getModuleList() as $module => $filename) {
438 439 440 441 442
      $updates = drupal_get_schema_versions($module);
      if ($updates !== FALSE) {
        $default = drupal_get_installed_schema_version($module);
        if (max($updates) > $default) {
          $requirements['update']['severity'] = REQUIREMENT_ERROR;
443 444
          $requirements['update']['value'] = t('Out of date');
          $requirements['update']['description'] = t('Some modules have database schema updates to install. You should run the <a href="@update">database update script</a> immediately.', array('@update' => base_path() . 'core/update.php'));
445 446 447 448 449 450
          break;
        }
      }
    }
  }

451 452
  // Verify the update.php access setting
  if ($phase == 'runtime') {
453
    if (Settings::get('update_free_access')) {
454
      $requirements['update access'] = array(
455
        'value' => t('Not protected'),
456
        'severity' => REQUIREMENT_ERROR,
457
        'description' => t('The update.php script is accessible to everyone without authentication check, which is a security risk. You must change the @settings_name value in your settings.php back to FALSE.', array('@settings_name' => '$settings[\'update_free_access\']')),
458 459 460 461
      );
    }
    else {
      $requirements['update access'] = array(
462
        'value' => t('Protected'),
463 464
      );
    }
465
    $requirements['update access']['title'] = t('Access to update.php');
466 467
  }

468 469
  // Display an error if a newly introduced dependency in a module is not resolved.
  if ($phase == 'update') {
470
    $profile = drupal_get_profile();
471 472
    $files = system_rebuild_module_data();
    foreach ($files as $module => $file) {
473
      // Ignore disabled modules and installation profiles.
474
      if (!$file->status || $module == $profile) {
475 476 477 478 479 480
        continue;
      }
      // Check the module's PHP version.
      $name = $file->info['name'];
      $php = $file->info['php'];
      if (version_compare($php, PHP_VERSION, '>')) {
481
        $requirements['php']['description'] .= t('@name requires at least PHP @version.', array('@name' => $name, '@version' => $php));
482 483 484 485 486 487 488 489
        $requirements['php']['severity'] = REQUIREMENT_ERROR;
      }
      // Check the module's required modules.
      foreach ($file->requires as $requirement) {
        $required_module = $requirement['name'];
        // Check if the module exists.
        if (!isset($files[$required_module])) {
          $requirements["$module-$required_module"] = array(
490 491
            'title' => t('Unresolved dependency'),
            'description' => t('@name requires this module.', array('@name' => $name)),
492 493 494 495 496 497 498 499
            'value' => t('@required_name (Missing)', array('@required_name' => $required_module)),
            'severity' => REQUIREMENT_ERROR,
          );
          continue;
        }
        // Check for an incompatible version.
        $required_file = $files[$required_module];
        $required_name = $required_file->info['name'];
500
        $version = str_replace(\Drupal::CORE_COMPATIBILITY . '-', '', $required_file->info['version']);
501 502 503 504
        $compatibility = drupal_check_incompatibility($requirement, $version);
        if ($compatibility) {
          $compatibility = rtrim(substr($compatibility, 2), ')');
          $requirements["$module-$required_module"] = array(
505 506
            'title' => t('Unresolved dependency'),
            'description' => t('@name requires this module and version. Currently using @required_name version @version', array('@name' => $name, '@required_name' => $required_name, '@version' => $version)),
507 508 509 510 511 512 513 514 515
            'value' => t('@required_name (Version @compatibility required)', array('@required_name' => $required_name, '@compatibility' => $compatibility)),
            'severity' => REQUIREMENT_ERROR,
          );
          continue;
        }
      }
    }
  }

516
  // Test Unicode library
517
  include_once DRUPAL_ROOT . '/core/includes/unicode.inc';
518 519
  $requirements = array_merge($requirements, unicode_requirements());

520
  if ($phase == 'runtime') {
521
    // Check for update status module.
522
    if (!\Drupal::moduleHandler()->moduleExists('update')) {
523
      $requirements['update status'] = array(
524
        'value' => t('Not enabled'),
525
        'severity' => REQUIREMENT_WARNING,
526
        'description' => t('Update notifications are not enabled. It is <strong>highly recommended</strong> that you enable the Update Manager module from the <a href="@module">module administration page</a> in order to stay up-to-date on new releases. For more information, <a href="@update">Update status handbook page</a>.', array('@update' => 'http://drupal.org/documentation/modules/update', '@module' => url('admin/modules'))),
527 528 529 530
      );
    }
    else {
      $requirements['update status'] = array(
531
        'value' => t('Enabled'),
532 533
      );
    }
534
    $requirements['update status']['title'] = t('Update notifications');
535

536
    if (Settings::get('rebuild_access')) {
537 538 539 540 541 542 543
      $requirements['rebuild access'] = array(
        'title' => t('Rebuild access'),
        'value' => t('Enabled'),
        'severity' => REQUIREMENT_ERROR,
        'description' => t('The rebuild_access setting is enabled in settings.php. It is recommended to have this setting disabled unless you are performing a rebuild.'),
      );
    }
544 545
  }

546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564
  // Ensure that if upgrading from 7 to 8 we have no disabled modules.
  if ($phase == 'update' && db_table_exists('system')) {
    $modules = db_query('SELECT name, info FROM {system} WHERE type = :module AND status = 0 AND schema_version <> :schema_uninstalled', array(
      ':module' => 'module',
      ':schema_uninstalled' => SCHEMA_UNINSTALLED,
    ))->fetchAllKeyed(0, 1);
    array_walk($modules, function (&$value, $key) {
      $info = unserialize($value);
      $value = $info['name'];
    });
    if (!empty($modules)) {
      $requirements['disabled_modules'] = array(
        'severity' => REQUIREMENT_ERROR,
        'title' => t('Disabled modules'),
        'value' => format_plural(count($modules), 'The %modules module is disabled.', 'The following modules are disabled: %modules', array('%modules' => implode(', ', $modules))),
        'description' => t('Drupal 8 no longer supports disabled modules. Please either enable or uninstall them before upgrading.'),
      );
    }
  }
565 566 567
  return $requirements;
}

568
/**
569
 * Implements hook_install().
570
 */
571
function system_install() {
572
  // Populate the cron key state variable.
573
  $cron_key = Crypt::randomBytesBase64(55);
574
  \Drupal::state()->set('system.cron_key', $cron_key);
575 576 577 578 579

  // Populate the site UUID.
  \Drupal::config('system.site')
    ->set('uuid', \Drupal::service('uuid')->generate())
    ->save();
580 581
}

582
/**
583
 * Implements hook_schema().
584 585 586
 */
function system_schema() {
  $schema['batch'] = array(
587
    'description' => 'Stores details about batches (processes that run in multiple HTTP requests).',
588
    'fields' => array(
589
      'bid' => array(
590
        'description' => 'Primary Key: Unique batch ID.',
591 592 593
        // This is not a serial column, to allow both progressive and
        // non-progressive batches. See batch_process().
        'type' => 'int',
594
        'unsigned' => TRUE,
595 596
        'not null' => TRUE,
      ),
597
      'token' => array(
598
        'description' => "A string token generated against the current user's session id and the batch id, used to ensure that only the user who submitted the batch can effectively access it.",
599 600
        'type' => 'varchar',
        'length' => 64,
601 602
        'not null' => TRUE,
      ),
603
      'timestamp' => array(
604
        'description' => 'A Unix timestamp indicating when this batch was submitted for processing. Stale batches are purged at cron time.',
605
        'type' => 'int',
606 607
        'not null' => TRUE,
      ),
608
      'batch' => array(
609
        'description' => 'A serialized array containing the processing data for the batch.',
610
        'type' => 'blob',
611
        'not null' => FALSE,
612
        'size' => 'big',
613
      ),
614
    ),
615
    'primary key' => array('bid'),
616 617 618 619
    'indexes' => array(
      'token' => array('token'),
    ),
  );
620 621

  $schema['flood'] = array(
622
    'description' => 'Flood controls the threshold of events, such as the number of contact attempts.',
623
    'fields' => array(
624
      'fid' => array(
625
        'description' => 'Unique flood event ID.',
626
        'type' => 'serial',
627 628
        'not null' => TRUE,
      ),
629
      'event' => array(
630
        'description' => 'Name of event (e.g. contact).',
631 632 633
        'type' => 'varchar',
        'length' => 64,
        'not null' => TRUE,
634 635
        'default' => '',
      ),
636 637
      'identifier' => array(
        'description' => 'Identifier of the visitor, such as an IP address or hostname.',
638 639 640
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
641 642
        'default' => '',
      ),
643
      'timestamp' => array(
644
        'description' => 'Timestamp of the event.',
645 646
        'type' => 'int',
        'not null' => TRUE,
647
        'default' => 0,
648
      ),
649 650 651 652 653 654
      'expiration' => array(
        'description' => 'Expiration timestamp. Expired events are purged on cron run.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
655
    ),
656
    'primary key' => array('fid'),
657
    'indexes' => array(
658
      'allow' => array('event', 'identifier', 'timestamp'),
659
      'purge' => array('expiration'),
660
    ),
661
  );
662

663
  $schema['key_value'] = array(
664
    'description' => 'Generic key-value storage table. See the state system for an example.',
665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689
    'fields' => array(
      'collection' => array(
        'description' => 'A named collection of key and value pairs.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
      ),
      'name' => array(
        'description' => 'The key of the key-value pair. As KEY is a SQL reserved keyword, name was chosen instead.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
      ),
      'value' => array(
        'description' => 'The value.',
        'type' => 'blob',
        'not null' => TRUE,
        'size' => 'big',
      ),
    ),
    'primary key' => array('collection', 'name'),
  );

690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723
  $schema['key_value_expire'] = array(
    'description' => 'Generic key/value storage table with an expiration.',
    'fields' => array(
      'collection' => array(
        'description' => 'A named collection of key and value pairs.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
      ),
      'name' => array(
        // KEY is an SQL reserved word, so use 'name' as the key's field name.
        'description' => 'The key of the key/value pair.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
      ),
      'value' => array(
        'description' => 'The value of the key/value pair.',
        'type' => 'blob',
        'not null' => TRUE,
        'size' => 'big',
      ),
      'expire' => array(
        'description' => 'The time since Unix epoch in seconds when this item expires. Defaults to the maximum possible time.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 2147483647,
      ),
    ),
    'primary key' => array('collection', 'name'),
    'indexes' => array(
      'all' => array('name', 'collection', 'expire'),
724
      'expire' => array('expire'),
725 726 727
    ),
  );

728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744
  $schema['queue'] = array(
    'description' => 'Stores items in queues.',
    'fields' => array(
      'item_id' => array(
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'description' => 'Primary Key: Unique item ID.',
      ),
      'name' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The queue name.',
      ),
      'data' => array(
745
        'type' => 'blob',
746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765
        'not null' => FALSE,
        'size' => 'big',
        'serialize' => TRUE,
        'description' => 'The arbitrary data for the item.',
      ),
      'expire' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Timestamp when the claim lease expires on the item.',
      ),
      'created' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Timestamp when the item was created.',
      ),
    ),
    'primary key' => array('item_id'),
    'indexes' => array(
766 767
      'name_created' => array('name', 'created'),
      'expire' => array('expire'),
768 769 770
    ),
  );

771 772 773 774 775 776 777 778 779 780
  $schema['router'] = array(
    'description' => 'Maps paths to various callbacks (access, page and title)',
    'fields' => array(
      'name' => array(
        'description' => 'Primary Key: Machine name of this route',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ),
781 782
      'path' => array(
        'description' => 'The path for this URI',
783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ),
      'pattern_outline' => array(
        'description' => 'The pattern',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ),
      'fit' => array(
        'description' => 'A numeric representation of how specific the path is.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ),
      'route' => array(
        'description' => 'A serialized Route object',
803 804
        'type' => 'blob',
        'size' => 'big',
805 806 807 808 809 810 811 812 813 814
      ),
      'number_parts' => array(
        'description' => 'Number of parts in this router path.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'size' => 'small',
      ),
    ),
    'indexes' => array(
815
      'pattern_outline_fit' => array('pattern_outline', 'fit'),
816 817 818 819
    ),
    'primary key' => array('name'),
  );

820
  $schema['semaphore'] = array(
821
    'description' => 'Table for holding semaphores, locks, flags, etc. that cannot be stored as state since they must not be cached.',
822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843
    'fields' => array(
      'name' => array(
        'description' => 'Primary Key: Unique name.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => ''
      ),
      'value' => array(
        'description' => 'A value for the semaphore.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => ''
      ),
      'expire' => array(
        'description' => 'A Unix timestamp with microseconds indicating when the semaphore should expire.',
        'type' => 'float',
        'size' => 'big',
        'not null' => TRUE
      ),
    ),
844 845 846 847
    'indexes' => array(
      'value' => array('value'),
      'expire' => array('expire'),
    ),
848 849 850
    'primary key' => array('name'),
  );

851 852 853 854 855 856 857 858 859 860