system.install 57.6 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\FileSystem\FileSystem as FileSystemComponent;
9
use Drupal\Component\Utility\Crypt;
10
use Drupal\Component\Utility\Environment;
11
use Drupal\Component\Utility\OpCodeCache;
12
use Drupal\Component\Utility\Unicode;
13
use Drupal\Core\Database\Database;
14
use Drupal\Core\DrupalKernel;
15 16
use Drupal\Core\Entity\Sql\SqlContentEntityStorage;
use Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema;
17
use Drupal\Core\File\FileSystemInterface;
18
use Drupal\Core\Site\Settings;
19
use Drupal\Core\StreamWrapper\PrivateStream;
20
use Drupal\Core\StreamWrapper\PublicStream;
21 22
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\Url;
23
use Symfony\Component\HttpFoundation\Request;
24

25
/**
26
 * Implements hook_requirements().
27 28
 */
function system_requirements($phase) {
29
  global $install_state;
30
  $requirements = [];
31 32 33

  // Report Drupal version
  if ($phase == 'runtime') {
34
    $requirements['drupal'] = [
35
      'title' => t('Drupal'),
36
      'value' => \Drupal::VERSION,
Steven Wittens's avatar
Steven Wittens committed
37 38
      'severity' => REQUIREMENT_INFO,
      'weight' => -10,
39
    ];
40

41 42
    // Display the currently active installation profile, if the site
    // is not running the default installation profile.
43
    $profile = \Drupal::installProfile();
44
    if ($profile != 'standard') {
45
      $info = \Drupal::service('extension.list.module')->getExtensionInfo($profile);
46
      $requirements['install_profile'] = [
47
        'title' => t('Installation profile'),
48
        'value' => t('%profile_name (%profile-%version)', [
49 50
          '%profile_name' => $info['name'],
          '%profile' => $profile,
51
          '%version' => $info['version'],
52
        ]),
53
        'severity' => REQUIREMENT_INFO,
54
        'weight' => -9,
55
      ];
56
    }
57 58

    // Warn if any experimental modules are installed.
59
    $experimental_modules = [];
60
    $enabled_modules = \Drupal::moduleHandler()->getModuleList();
61
    foreach ($enabled_modules as $module => $data) {
62
      $info = \Drupal::service('extension.list.module')->getExtensionInfo($module);
63
      if (isset($info['package']) && $info['package'] === 'Core (Experimental)') {
64
        $experimental_modules[$module] = $info['name'];
65 66
      }
    }
67 68
    if (!empty($experimental_modules)) {
      $requirements['experimental_modules'] = [
69
        'title' => t('Experimental modules enabled'),
70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85
        'value' => t('Experimental modules found: %module_list. <a href=":url">Experimental modules</a> are provided for testing purposes only. Use at your own risk.', ['%module_list' => implode(', ', $experimental_modules), ':url' => 'https://www.drupal.org/core/experimental']),
        'severity' => REQUIREMENT_WARNING,
      ];
    }
    // Warn if any experimental themes are installed.
    $experimental_themes = [];
    $installed_themes = \Drupal::service('theme_handler')->listInfo();
    foreach ($installed_themes as $theme => $data) {
      if (isset($data->info['experimental']) && $data->info['experimental']) {
        $experimental_themes[$theme] = $data->info['name'];
      }
    }
    if (!empty($experimental_themes)) {
      $requirements['experimental_themes'] = [
        'title' => t('Experimental themes enabled'),
        'value' => t('Experimental themes found: %theme_list. Experimental themes are provided for testing purposes only. Use at your own risk.', ['%theme_list' => implode(', ', $experimental_themes)]),
86
        'severity' => REQUIREMENT_WARNING,
87
      ];
88
    }
89 90
  }

91
  // Web server information.
92 93
  $request_object = \Drupal::request();
  $software = $request_object->server->get('SERVER_SOFTWARE');
94
  $requirements['webserver'] = [
95
    'title' => t('Web server'),
Steven Wittens's avatar
Steven Wittens committed
96
    'value' => $software,
97
  ];
98

99
  // Tests clean URL support.
100
  if ($phase == 'install' && $install_state['interactive'] && !$request_object->query->has('rewrite') && strpos($software, 'Apache') !== FALSE) {
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123
    // If the Apache rewrite module is not enabled, Apache version must be >=
    // 2.2.16 because of the FallbackResource directive in the root .htaccess
    // file. Since the Apache version reported by the server is dependent on the
    // ServerTokens setting in httpd.conf, we may not be able to determine if a
    // given config is valid. Thus we are unable to use version_compare() as we
    // need have three possible outcomes: the version of Apache is greater than
    // 2.2.16, is less than 2.2.16, or cannot be determined accurately. In the
    // first case, we encourage the use of mod_rewrite; in the second case, we
    // raise an error regarding the minimum Apache version; in the third case,
    // we raise a warning that the current version of Apache may not be
    // supported.
    $rewrite_warning = FALSE;
    $rewrite_error = FALSE;
    $apache_version_string = 'Apache';

    // Determine the Apache version number: major, minor and revision.
    if (preg_match('/Apache\/(\d+)\.?(\d+)?\.?(\d+)?/', $software, $matches)) {
      $apache_version_string = $matches[0];

      // Major version number
      if ($matches[1] < 2) {
        $rewrite_error = TRUE;
      }
124
      elseif ($matches[1] == 2) {
125 126 127
        if (!isset($matches[2])) {
          $rewrite_warning = TRUE;
        }
128
        elseif ($matches[2] < 2) {
129 130
          $rewrite_error = TRUE;
        }
131
        elseif ($matches[2] == 2) {
132 133 134
          if (!isset($matches[3])) {
            $rewrite_warning = TRUE;
          }
135
          elseif ($matches[3] < 16) {
136 137 138 139 140 141 142 143 144 145
            $rewrite_error = TRUE;
          }
        }
      }
    }
    else {
      $rewrite_warning = TRUE;
    }

    if ($rewrite_warning) {
146
      $requirements['apache_version'] = [
147 148 149
        'title' => t('Apache version'),
        'value' => $apache_version_string,
        'severity' => REQUIREMENT_WARNING,
150 151
        'description' => t('Due to the settings for ServerTokens in httpd.conf, it is impossible to accurately determine the version of Apache running on this server. The reported value is @reported, to run Drupal without mod_rewrite, a minimum version of 2.2.16 is needed.', ['@reported' => $apache_version_string]),
      ];
152 153 154
    }

    if ($rewrite_error) {
155
      $requirements['Apache version'] = [
156 157 158
        'title' => t('Apache version'),
        'value' => $apache_version_string,
        'severity' => REQUIREMENT_ERROR,
159
        'description' => t('The minimum version of Apache needed to run Drupal without mod_rewrite enabled is 2.2.16. See the <a href=":link">enabling clean URLs</a> page for more information on mod_rewrite.', [':link' => 'http://drupal.org/docs/8/clean-urls-in-drupal-8']),
160
      ];
161 162 163
    }

    if (!$rewrite_error && !$rewrite_warning) {
164
      $requirements['rewrite_module'] = [
165 166 167
        'title' => t('Clean URLs'),
        'value' => t('Disabled'),
        'severity' => REQUIREMENT_WARNING,
168
        'description' => t('Your server is capable of using clean URLs, but it is not enabled. Using clean URLs gives an improved user experience and is recommended. <a href=":link">Enable clean URLs</a>', [':link' => 'http://drupal.org/docs/8/clean-urls-in-drupal-8']),
169
      ];
170 171 172
    }
  }

173 174 175 176 177
  // Verify the user is running a supported PHP version.
  // If the site is running a recommended version of PHP, just display it
  // as an informational message on the status report. This will be overridden
  // with an error or warning if the site is running older PHP versions for
  // which Drupal has already or will soon drop support.
178
  $phpversion = $phpversion_label = phpversion();
179
  if (function_exists('phpinfo')) {
180
    if ($phase === 'runtime') {
181
      $phpversion_label = t('@phpversion (<a href=":url">more information</a>)', ['@phpversion' => $phpversion, ':url' => (new Url('system.php'))->toString()]);
182
    }
183
    $requirements['php'] = [
184
      'title' => t('PHP'),
185
      'value' => $phpversion_label,
186
    ];
187 188
  }
  else {
189 190
    // @todo Revisit whether this description makes sense in
    //   https://www.drupal.org/project/drupal/issues/2927318.
191
    $requirements['php'] = [
192
      'title' => t('PHP'),
193
      'value' => $phpversion_label,
194
      '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.', [':phpinfo' => 'https://www.drupal.org/node/243993']),
195
      'severity' => REQUIREMENT_INFO,
196
    ];
197 198
  }

199 200 201 202 203 204 205 206 207
  // Check if the PHP version is below what Drupal supports.
  if (version_compare($phpversion, DRUPAL_MINIMUM_SUPPORTED_PHP) < 0) {
    $requirements['php']['description'] = t('Your PHP installation is too old. Drupal requires at least PHP %version. It is recommended to upgrade to PHP version %recommended or higher for the best ongoing support. See <a href="http://php.net/supported-versions.php">PHP\'s version support documentation</a> and the <a href=":php_requirements">Drupal 8 PHP requirements handbook page</a> for more information.',
      [
        '%version' => DRUPAL_MINIMUM_SUPPORTED_PHP,
        '%recommended' => DRUPAL_RECOMMENDED_PHP,
        ':php_requirements' => 'https://www.drupal.org/docs/8/system-requirements/php',
      ]
    );
208
    $requirements['php']['severity'] = REQUIREMENT_ERROR;
209 210 211 212 213 214 215 216 217 218

    // If the PHP version is also below the absolute minimum allowed, it's not
    // safe to continue with the requirements check.
    if (version_compare($phpversion, DRUPAL_MINIMUM_PHP) < 0) {
      return $requirements;
    }
    // Otherwise downgrade the error to a warning during updates. Even if there
    // are some problems with the site's PHP version, it's still better for the
    // site to keep its Drupal codebase up to date.
    elseif ($phase === 'update') {
219 220
      $requirements['php']['severity'] = REQUIREMENT_WARNING;
    }
221 222 223 224 225 226 227
    // Since we allow sites with unsupported PHP versions to still run Drupal
    // updates, we also need to be able to run tests with those PHP versions,
    // which requires the ability to install test sites. Not all tests are
    // required to pass on these PHP versions, but we want to monitor which
    // ones do and don't.
    elseif ($phase === 'install' && drupal_valid_test_ua()) {
      $requirements['php']['severity'] = REQUIREMENT_INFO;
228
    }
229
  }
230 231 232 233 234 235
  // For PHP versions that are still supported but no longer recommended,
  // inform users of what's recommended, allowing them to take action before it
  // becomes urgent.
  elseif ($phase === 'runtime' && version_compare($phpversion, DRUPAL_RECOMMENDED_PHP) < 0) {
    $requirements['php']['description'] = t('It is recommended to upgrade to PHP version %recommended or higher for the best ongoing support.  See <a href="http://php.net/supported-versions.php">PHP\'s version support documentation</a> and the <a href=":php_requirements">Drupal 8 PHP requirements handbook page</a> for more information.', ['%recommended' => DRUPAL_RECOMMENDED_PHP, ':php_requirements' => 'https://www.drupal.org/docs/8/system-requirements/php']);
    $requirements['php']['severity'] = REQUIREMENT_INFO;
236 237
  }

238
  // Test for PHP extensions.
239
  $requirements['php_extensions'] = [
240
    'title' => t('PHP extensions'),
241
  ];
242

243 244
  $missing_extensions = [];
  $required_extensions = [
245 246 247 248 249 250 251 252 253 254 255
    'date',
    'dom',
    'filter',
    'gd',
    'hash',
    'json',
    'pcre',
    'pdo',
    'session',
    'SimpleXML',
    'SPL',
256
    'tokenizer',
257
    'xml',
258
  ];
259 260 261 262 263 264 265
  foreach ($required_extensions as $extension) {
    if (!extension_loaded($extension)) {
      $missing_extensions[] = $extension;
    }
  }

  if (!empty($missing_extensions)) {
266
    $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):', [
267
      ':system_requirements' => 'https://www.drupal.org/requirements',
268
    ]);
269

270
    // We use twig inline_template to avoid twig's autoescape.
271
    $description = [
272 273
      '#type' => 'inline_template',
      '#template' => '{{ description }}{{ missing_extensions }}',
274
      '#context' => [
275
        'description' => $description,
276
        'missing_extensions' => [
277 278
          '#theme' => 'item_list',
          '#items' => $missing_extensions,
279 280 281
        ],
      ],
    ];
282

283
    $requirements['php_extensions']['value'] = t('Disabled');
284 285
    $requirements['php_extensions']['severity'] = REQUIREMENT_ERROR;
    $requirements['php_extensions']['description'] = $description;
286 287
  }
  else {
288
    $requirements['php_extensions']['value'] = t('Enabled');
289 290 291 292
  }

  if ($phase == 'install' || $phase == 'runtime') {
    // Check to see if OPcache is installed.
293
    if (!OpCodeCache::isEnabled()) {
294
      $requirements['php_opcache'] = [
295 296
        'value' => t('Not enabled'),
        'severity' => REQUIREMENT_WARNING,
297
        'description' => t('PHP OPcode caching can improve your site\'s performance considerably. It is <strong>highly recommended</strong> to have <a href="http://php.net/manual/opcache.installation.php" target="_blank">OPcache</a> installed on your server.'),
298
      ];
299 300 301 302 303
    }
    else {
      $requirements['php_opcache']['value'] = t('Enabled');
    }
    $requirements['php_opcache']['title'] = t('PHP OPcode caching');
304
  }
305

306 307
  if ($phase != 'update') {
    // Test whether we have a good source of random bytes.
308
    $requirements['php_random_bytes'] = [
309
      'title' => t('Random number generation'),
310
    ];
311 312 313
    try {
      $bytes = random_bytes(10);
      if (strlen($bytes) != 10) {
314
        throw new \Exception(t('Tried to generate 10 random bytes, generated @count', ['@count' => strlen($bytes)]));
315 316 317 318 319 320 321 322 323 324 325
      }
      $requirements['php_random_bytes']['value'] = t('Successful');
    }
    catch (\Exception $e) {
      // If /dev/urandom is not available on a UNIX-like system, check whether
      // open_basedir restrictions are the cause.
      $open_basedir_blocks_urandom = FALSE;
      if (DIRECTORY_SEPARATOR === '/' && !@is_readable('/dev/urandom')) {
        $open_basedir = ini_get('open_basedir');
        if ($open_basedir) {
          $open_basedir_paths = explode(PATH_SEPARATOR, $open_basedir);
326
          $open_basedir_blocks_urandom = !array_intersect(['/dev', '/dev/', '/dev/urandom'], $open_basedir_paths);
327 328
        }
      }
329
      $args = [
330
        ':drupal-php' => 'https://www.drupal.org/docs/8/system-requirements/php-requirements',
331
        '%exception_message' => $e->getMessage(),
332
      ];
333 334 335 336 337 338 339 340 341 342 343
      if ($open_basedir_blocks_urandom) {
        $requirements['php_random_bytes']['description'] = t('Drupal is unable to generate highly randomized numbers, which means certain security features like password reset URLs are not as secure as they should be. Instead, only a slow, less-secure fallback generator is available. The most likely cause is that open_basedir restrictions are in effect and /dev/urandom is not on the whitelist. See the <a href=":drupal-php">system requirements</a> page for more information. %exception_message', $args);
      }
      else {
        $requirements['php_random_bytes']['description'] = t('Drupal is unable to generate highly randomized numbers, which means certain security features like password reset URLs are not as secure as they should be. Instead, only a slow, less-secure fallback generator is available. See the <a href=":drupal-php">system requirements</a> page for more information. %exception_message', $args);
      }
      $requirements['php_random_bytes']['value'] = t('Less secure');
      $requirements['php_random_bytes']['severity'] = REQUIREMENT_ERROR;
    }
  }

344 345
  if ($phase == 'install' || $phase == 'update') {
    // Test for PDO (database).
346
    $requirements['database_extensions'] = [
347
      'title' => t('Database support'),
348
    ];
349

350
    // Make sure PDO is available.
351
    $database_ok = extension_loaded('pdo');
352
    if (!$database_ok) {
353
      $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.', [
354
        ':link' => 'https://www.drupal.org/requirements/pdo',
355
      ]);
356 357 358
    }
    else {
      // Make sure at least one supported database driver exists.
359
      $drivers = drupal_detect_database_types();
360 361
      if (empty($drivers)) {
        $database_ok = FALSE;
362
        $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>.', [
363
          ':drupal-databases' => 'https://www.drupal.org/requirements/database',
364
        ]);
365 366 367 368 369
      }
      // 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;
370
        $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.', [
371
          ':link' => 'https://www.drupal.org/requirements/pdo#pecl',
372
        ]);
373
      }
374
    }
375

376
    if (!$database_ok) {
377
      $requirements['database_extensions']['value'] = t('Disabled');
378
      $requirements['database_extensions']['severity'] = REQUIREMENT_ERROR;
379
      $requirements['database_extensions']['description'] = $pdo_message;
380 381
    }
    else {
382
      $requirements['database_extensions']['value'] = t('Enabled');
383
    }
384
  }
385 386
  else {
    // Database information.
387
    $class = Database::getConnection()->getDriverClass('Install\\Tasks');
388
    $tasks = new $class();
389
    $requirements['database_system'] = [
390
      'title' => t('Database system'),
391
      'value' => $tasks->name(),
392 393
    ];
    $requirements['database_system_version'] = [
394
      'title' => t('Database system version'),
395
      'value' => Database::getConnection()->version(),
396
    ];
397
  }
398

399
  // Test PHP memory_limit
400
  $memory_limit = ini_get('memory_limit');
401
  $requirements['php_memory_limit'] = [
402
    'title' => t('PHP memory limit'),
403
    'value' => $memory_limit == -1 ? t('-1 (Unlimited)') : $memory_limit,
404
  ];
405

406
  if (!Environment::checkMemoryLimit(DRUPAL_MINIMUM_PHP_MEMORY_LIMIT, $memory_limit)) {
407
    $description = [];
408
    if ($phase == 'install') {
409
      $description['phase'] = t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the installation process.', ['%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT]);
410 411
    }
    elseif ($phase == 'update') {
412
      $description['phase'] = t('Consider increasing your PHP memory limit to %memory_minimum_limit to help prevent errors in the update process.', ['%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT]);
413
    }
414
    elseif ($phase == 'runtime') {
415
      $description['phase'] = 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.', ['%memory_limit' => $memory_limit, '%memory_minimum_limit' => DRUPAL_MINIMUM_PHP_MEMORY_LIMIT]);
416
    }
417

418
    if (!empty($description['phase'])) {
419
      if ($php_ini_path = get_cfg_var('cfg_file_path')) {
420
        $description['memory'] = 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).', ['%configuration-file' => $php_ini_path]);
421 422
      }
      else {
423
        $description['memory'] = t('Contact your system administrator or hosting provider for assistance with increasing your PHP memory limit.');
424
      }
425

426
      $handbook_link = t('For more information, see the online handbook entry for <a href=":memory-limit">increasing the PHP memory limit</a>.', [':memory-limit' => 'https://www.drupal.org/node/207036']);
427

428
      $description = [
429 430
        '#type' => 'inline_template',
        '#template' => '{{ description_phase }} {{ description_memory }} {{ handbook }}',
431
        '#context' => [
432 433 434
          'description_phase' => $description['phase'],
          'description_memory' => $description['memory'],
          'handbook' => $handbook_link,
435 436
        ],
      ];
437 438

      $requirements['php_memory_limit']['description'] = $description;
439
      $requirements['php_memory_limit']['severity'] = REQUIREMENT_WARNING;
440
    }
441
  }
442

443
  // Test configuration files and directory for writability.
444
  if ($phase == 'runtime') {
445
    $conf_errors = [];
446 447 448 449 450 451 452 453
    // Find the site path. Kernel service is not always available at this point,
    // but is preferred, when available.
    if (\Drupal::hasService('kernel')) {
      $site_path = \Drupal::service('site.path');
    }
    else {
      $site_path = DrupalKernel::findSitePath(Request::createFromGlobals());
    }
454 455 456 457
    // Allow system administrators to disable permissions hardening for the site
    // directory. This allows additional files in the site directory to be
    // updated when they are managed in a version control system.
    if (Settings::get('skip_permissions_hardening')) {
458
      $error_value = t('Protection disabled');
459 460 461 462 463
      // If permissions hardening is disabled, then only show a warning for a
      // writable file, as a reminder, rather than an error.
      $file_protection_severity = REQUIREMENT_WARNING;
    }
    else {
464
      $error_value = t('Not protected');
465 466 467
      // In normal operation, writable files or directories are an error.
      $file_protection_severity = REQUIREMENT_ERROR;
      if (!drupal_verify_install_file($site_path, FILE_NOT_WRITABLE, 'dir')) {
468
        $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.", ['%file' => $site_path]);
469
      }
470
    }
471
    foreach (['settings.php', 'settings.local.php', 'services.yml'] as $conf_file) {
472
      $full_path = $site_path . '/' . $conf_file;
473
      if (file_exists($full_path) && !drupal_verify_install_file($full_path, FILE_EXIST | FILE_READABLE | FILE_NOT_WRITABLE, 'file', !Settings::get('skip_permissions_hardening'))) {
474
        $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.", ['%file' => $full_path]);
475 476 477 478 479 480 481
      }
    }
    if (!empty($conf_errors)) {
      if (count($conf_errors) == 1) {
        $description = $conf_errors[0];
      }
      else {
482
        // We use twig inline_template to avoid double escaping.
483
        $description = [
484 485
          '#type' => 'inline_template',
          '#template' => '{{ configuration_error_list }}',
486 487
          '#context' => [
            'configuration_error_list' => [
488 489
              '#theme' => 'item_list',
              '#items' => $conf_errors,
490 491 492
            ],
          ],
        ];
493
      }
494
      $requirements['configuration_files'] = [
495
        'value' => $error_value,
496
        'severity' => $file_protection_severity,
497
        'description' => $description,
498
      ];
499 500
    }
    else {
501
      $requirements['configuration_files'] = [
502
        'value' => t('Protected'),
503
      ];
504
    }
505
    $requirements['configuration_files']['title'] = t('Configuration files');
506 507
  }

508 509 510 511
  // 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.
512 513 514 515 516
    /** @var \Drupal\Core\File\HtaccessWriterInterface $htaccessWriter */
    $htaccessWriter = \Drupal::service("file.htaccess_writer");
    $htaccessWriter->ensure();
    foreach ($htaccessWriter->defaultProtectedDirs() as $protected_dir) {
      $htaccess_file = $protected_dir->getPath() . '/.htaccess';
517 518 519
      // Check for the string which was added to the recommended .htaccess file
      // in the latest security update.
      if (!file_exists($htaccess_file) || !($contents = @file_get_contents($htaccess_file)) || strpos($contents, 'Drupal_Security_Do_Not_Remove_See_SA_2013_003') === FALSE) {
520
        $url = 'https://www.drupal.org/SA-CORE-2013-003';
521
        $requirements[$htaccess_file] = [
522
          'title' => new TranslatableMarkup($protected_dir->getTitle()),
523 524
          'value' => t('Not fully protected'),
          'severity' => REQUIREMENT_ERROR,
525
          '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.', [':url' => $url, '@url' => $url, '%directory' => $protected_dir->getPath()]),
526
        ];
527 528 529 530
      }
    }
  }

531
  // Report cron status.
532
  if ($phase == 'runtime') {
533
    $cron_config = \Drupal::config('system.cron');
534
    // Cron warning threshold defaults to two days.
535
    $threshold_warning = $cron_config->get('threshold.requirements_warning');
536
    // Cron error threshold defaults to two weeks.
537
    $threshold_error = $cron_config->get('threshold.requirements_error');
538

539
    // Determine when cron last ran.
540
    $cron_last = \Drupal::state()->get('system.cron_last');
541
    if (!is_numeric($cron_last)) {
542
      $cron_last = \Drupal::state()->get('install_time', 0);
543
    }
544

545
    // Determine severity based on time since cron last ran.
546
    $severity = REQUIREMENT_INFO;
547
    if (REQUEST_TIME - $cron_last > $threshold_error) {
548
      $severity = REQUIREMENT_ERROR;
549
    }
550
    elseif (REQUEST_TIME - $cron_last > $threshold_warning) {
551 552 553 554
      $severity = REQUIREMENT_WARNING;
    }

    // Set summary and description based on values determined above.
555
    $summary = t('Last run @time ago', ['@time' => \Drupal::service('date.formatter')->formatTimeDiffSince($cron_last)]);
556

557
    $requirements['cron'] = [
558
      'title' => t('Cron maintenance tasks'),
559 560
      'severity' => $severity,
      'value' => $summary,
561
    ];
562 563 564 565 566 567 568
    if ($severity != REQUIREMENT_INFO) {
      $requirements['cron']['description'][] = [
        [
          '#markup' => t('Cron has not run recently.'),
          '#suffix' => ' ',
        ],
        [
569
          '#markup' => t('For more information, see the online handbook entry for <a href=":cron-handbook">configuring cron jobs</a>.', [':cron-handbook' => 'https://www.drupal.org/cron']),
570 571 572 573 574 575
          '#suffix' => ' ',
        ],
      ];
    }
    $requirements['cron']['description'][] = [
      [
576 577 578 579 580
        '#type' => 'link',
        '#prefix' => '(',
        '#title' => t('more information'),
        '#suffix' => ')',
        '#url' => Url::fromRoute('system.cron_settings'),
581 582
      ],
      [
583 584 585 586 587
        '#prefix' => '<span class="cron-description__run-cron">',
        '#suffix' => '</span>',
        '#type' => 'link',
        '#title' => t('Run cron'),
        '#url' => Url::fromRoute('system.run_cron'),
588 589
      ],
    ];
590
  }
591
  if ($phase != 'install') {
592
    $filesystem_config = \Drupal::config('system.file');
593
    $directories = [
594
      PublicStream::basePath(),
595 596
      // By default no private files directory is configured. For private files
      // to be secure the admin needs to provide a path outside the webroot.
597
      PrivateStream::basePath(),
598
      \Drupal::service('file_system')->getTempDirectory(),
599
    ];
600
  }
601

602 603
  // During an install we need to make assumptions about the file system
  // unless overrides are provided in settings.php.
604
  if ($phase == 'install') {
605
    $directories = [];
606
    if ($file_public_path = Settings::get('file_public_path')) {
607
      $directories[] = $file_public_path;
608 609 610
    }
    else {
      // If we are installing Drupal, the settings.php file might not exist yet
611
      // in the intended site directory, so don't require it.
612 613 614
      $request = Request::createFromGlobals();
      $site_path = DrupalKernel::findSitePath($request);
      $directories[] = $site_path . '/files';
615
    }
616 617
    if ($file_private_path = Settings::get('file_private_path')) {
      $directories[] = $file_private_path;
618
    }
619 620
    if (Settings::get('file_temp_path')) {
      $directories[] = Settings::get('file_temp_path');
621 622 623 624
    }
    else {
      // If the temporary directory is not overridden use an appropriate
      // temporary path for the system.
625
      $directories[] = FileSystemComponent::getOsTemporaryDirectory();
626
    }
627 628
  }

629 630 631
  // 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.
632 633 634 635 636 637 638 639 640
  $config_sync_directory = Settings::get('config_sync_directory');
  if (!empty($config_sync_directory)) {
    // If we're installing Drupal try and create the config sync directory.
    if (!is_dir($config_sync_directory) && $phase == 'install') {
      \Drupal::service('file_system')->prepareDirectory($config_sync_directory, FileSystemInterface::CREATE_DIRECTORY | FileSystemInterface::MODIFY_PERMISSIONS);
    }
    if (!is_dir($config_sync_directory)) {
      if ($phase == 'install') {
        $description = t('An automated attempt to create the directory %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>.', ['%directory' => $config_sync_directory, ':handbook_url' => 'https://www.drupal.org/server-permissions']);
641
      }
642 643
      else {
        $description = t('The directory %directory does not exist.', ['%directory' => $config_sync_directory]);
644
      }
645 646 647 648 649
      $requirements['config sync directory'] = [
        'title' => t('Configuration sync directory'),
        'description' => $description,
        'severity' => REQUIREMENT_ERROR,
      ];
650
    }
651
  }
652 653 654
  if ($phase != 'install' && empty($config_sync_directory)) {
    $requirements['config sync directory'] = [
      'title' => t('Configuration sync directory'),
655
      'value' => t('Not present'),
656
      'description' => t("Your %file file must define the %setting setting as a string containing the directory in which configuration files can be found.", ['%file' => $site_path . '/settings.php', '%setting' => "\$settings['config_sync_directory']"]),
657
      'severity' => REQUIREMENT_ERROR,
658
    ];
659 660
  }

661
  $requirements['file system'] = [
662
    'title' => t('File system'),
663
  ];
664

665 666 667
  $error = '';
  // For installer, create the directories if possible.
  foreach ($directories as $directory) {
668 669 670
    if (!$directory) {
      continue;
    }
671
    if ($phase == 'install') {
672
      \Drupal::service('file_system')->prepareDirectory($directory, FileSystemInterface::CREATE_DIRECTORY | FileSystemInterface::MODIFY_PERMISSIONS);
673
    }
674 675 676 677
    $is_writable = is_writable($directory);
    $is_directory = is_dir($directory);
    if (!$is_writable || !$is_directory) {
      $description = '';
678
      $requirements['file system']['value'] = t('Not writable');
679
      if (!$is_directory) {
680
        $error = t('The directory %directory does not exist.', ['%directory' => $directory]);
681 682
      }
      else {
683
        $error = t('The directory %directory is not writable.', ['%directory' => $directory]);
684 685 686
      }
      // The files directory requirement check is done only during install and runtime.
      if ($phase == 'runtime') {
687
        $description = t('You may need to set the correct directory at the <a href=":admin-file-system">file system settings page</a> or change the current directory\'s permissions so that it is writable.', [':admin-file-system' => Url::fromRoute('system.file_system_settings')->toString()]);
688 689 690 691
      }
      elseif ($phase == 'install') {
        // For the installer UI, we need different wording. 'value' will
        // be treated as version, so provide none there.
692
        $description = 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>.', [':handbook_url' => 'https://www.drupal.org/server-permissions']);
693 694 695
        $requirements['file system']['value'] = '';
      }
      if (!empty($description)) {
696
        $description = [
697 698
          '#type' => 'inline_template',
          '#template' => '{{ error }} {{ description }}',
699
          '#context' => [
700 701
            'error' => $error,
            'description' => $description,
702 703
          ],
        ];
704 705 706
        $requirements['file system']['description'] = $description;
        $requirements['file system']['severity'] = REQUIREMENT_ERROR;
      }
707 708
    }
    else {
709 710
      // This function can be called before the config_cache table has been
      // created.
711
      if ($phase == 'install' || \Drupal::config('system.file')->get('default_scheme') == 'public') {
712
        $requirements['file system']['value'] = t('Writable (<em>public</em> download method)');
713 714
      }
      else {
715
        $requirements['file system']['value'] = t('Writable (<em>private</em> download method)');
716
      }
717 718 719
    }
  }

720 721
  // See if updates are available in update.php.
  if ($phase == 'runtime') {
722
    $requirements['update'] = [
723 724
      'title' => t('Database updates'),
      'value' => t('Up to date'),
725
    ];
726