Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/lib/Drupal/Core/Updater/Module.php

@@ -0,0 +1,115 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Updater\Module.
+ */
+
+namespace Drupal\Core\Updater;
+
+use Drupal\Core\Url;
+
+/**
+ * Defines a class for updating modules using
+ * Drupal\Core\FileTransfer\FileTransfer classes via authorize.php.
+ */
+class Module extends Updater implements UpdaterInterface {
+
+  /**
+   * Returns the directory where a module should be installed.
+   *
+   * If the module is already installed, drupal_get_path() will return
+   * a valid path and we should install it there (although we need to use an
+   * absolute path, so we prepend DRUPAL_ROOT). If we're installing a new
+   * module, we always want it to go into /modules, since that's
+   * where all the documentation recommends users install their modules, and
+   * there's no way that can conflict on a multi-site installation, since
+   * the Update manager won't let you install a new module if it's already
+   * found on your system, and if there was a copy in the top-level we'd see it.
+   *
+   * @return string
+   *   A directory path.
+   */
+  public function getInstallDirectory() {
+    if ($relative_path = drupal_get_path('module', $this->name)) {
+      $relative_path = dirname($relative_path);
+    }
+    else {
+      $relative_path = 'modules';
+    }
+    return DRUPAL_ROOT . '/' . $relative_path;
+  }
+
+  /**
+   * Implements Drupal\Core\Updater\UpdaterInterface::isInstalled().
+   */
+  public function isInstalled() {
+    return (bool) drupal_get_path('module', $this->name);
+  }
+
+  /**
+   * Implements Drupal\Core\Updater\UpdaterInterface::canUpdateDirectory().
+   */
+  public static function canUpdateDirectory($directory) {
+    $info = static::getExtensionInfo($directory);
+
+    return (isset($info['type']) && $info['type'] == 'module');
+  }
+
+  /**
+   * Determines whether this class can update the specified project.
+   *
+   * @param string $project_name
+   *   The project to check.
+   *
+   * @return bool
+   */
+  public static function canUpdate($project_name) {
+    return (bool) drupal_get_path('module', $project_name);
+  }
+
+  /**
+   * Returns available database schema updates once a new version is installed.
+   *
+   * @return array
+   */
+  public function getSchemaUpdates() {
+    require_once DRUPAL_ROOT . '/core/includes/install.inc';
+    require_once DRUPAL_ROOT . '/core/includes/update.inc';
+
+    if (!self::canUpdate($this->name)) {
+      return array();
+    }
+    module_load_include('install', $this->name);
+
+    if (!$updates = drupal_get_schema_versions($this->name)) {
+      return array();
+    }
+    $modules_with_updates = update_get_update_list();
+    if ($updates = $modules_with_updates[$this->name]) {
+      if ($updates['start']) {
+        return $updates['pending'];
+      }
+    }
+    return array();
+  }
+
+  /**
+   * Overrides Drupal\Core\Updater\Updater::postInstallTasks().
+   */
+  public function postInstallTasks() {
+    return array(
+      \Drupal::l(t('Install another module'), new Url('update.module_install')),
+      \Drupal::l(t('Enable newly added modules'), new Url('system.modules_list')),
+      \Drupal::l(t('Administration pages'), new Url('system.admin')),
+    );
+  }
+
+  /**
+   * Overrides Drupal\Core\Updater\Updater::postUpdateTasks().
+   */
+  public function postUpdateTasks() {
+    // We don't want to check for DB updates here, we do that once for all
+    // updated modules on the landing page.
+  }
+}

core/lib/Drupal/Core/Updater/Theme.php

@@ -0,0 +1,89 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Updater\Theme.
+ */
+
+namespace Drupal\Core\Updater;
+
+use Drupal\Core\Url;
+
+/**
+ * Defines a class for updating themes using
+ * Drupal\Core\FileTransfer\FileTransfer classes via authorize.php.
+ */
+class Theme extends Updater implements UpdaterInterface {
+
+  /**
+   * Returns the directory where a theme should be installed.
+   *
+   * If the theme is already installed, drupal_get_path() will return
+   * a valid path and we should install it there (although we need to use an
+   * absolute path, so we prepend DRUPAL_ROOT). If we're installing a new
+   * theme, we always want it to go into /themes, since that's
+   * where all the documentation recommends users install their themes, and
+   * there's no way that can conflict on a multi-site installation, since
+   * the Update manager won't let you install a new theme if it's already
+   * found on your system, and if there was a copy in the top-level we'd see it.
+   *
+   * @return string
+   *   A directory path.
+   */
+  public function getInstallDirectory() {
+    if ($relative_path = drupal_get_path('theme', $this->name)) {
+      $relative_path = dirname($relative_path);
+    }
+    else {
+      $relative_path = 'themes';
+    }
+    return DRUPAL_ROOT . '/' . $relative_path;
+  }
+
+  /**
+   * Implements Drupal\Core\Updater\UpdaterInterface::isInstalled().
+   */
+  public function isInstalled() {
+    return (bool) drupal_get_path('theme', $this->name);
+  }
+
+  /**
+   * Implements Drupal\Core\Updater\UpdaterInterface::canUpdateDirectory().
+   */
+  static function canUpdateDirectory($directory) {
+    $info = static::getExtensionInfo($directory);
+
+    return (isset($info['type']) && $info['type'] == 'theme');
+  }
+
+  /**
+   * Determines whether this class can update the specified project.
+   *
+   * @param string $project_name
+   *   The project to check.
+   *
+   * @return bool
+   */
+  public static function canUpdate($project_name) {
+    return (bool) drupal_get_path('theme', $project_name);
+  }
+
+  /**
+   * Overrides Drupal\Core\Updater\Updater::postInstall().
+   */
+  public function postInstall() {
+    // Update the theme info.
+    clearstatcache();
+    \Drupal::service('theme_handler')->rebuildThemeData();
+  }
+
+  /**
+   * Overrides Drupal\Core\Updater\Updater::postInstallTasks().
+   */
+  public function postInstallTasks() {
+    return array(
+      \Drupal::l(t('Install newly added themes'), new Url('system.themes_page')),
+      \Drupal::l(t('Administration pages'), new Url('system.admin')),
+    );
+  }
+}

core/lib/Drupal/Core/Updater/Updater.php

@@ -0,0 +1,402 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Updater\Updater.
+ */
+
+namespace Drupal\Core\Updater;
+
+use Drupal\Component\Utility\Unicode;
+use Drupal\Core\FileTransfer\FileTransferException;
+use Drupal\Core\FileTransfer\FileTransfer;
+
+/**
+ * Defines the base class for Updaters used in Drupal.
+ */
+class Updater {
+
+  /**
+   * Directory to install from.
+   *
+   * @var string
+   */
+  public $source;
+
+  /**
+   * Constructs a new updater.
+   *
+   * @param string $source
+   *   Directory to install from.
+   */
+  public function __construct($source) {
+    $this->source = $source;
+    $this->name = self::getProjectName($source);
+    $this->title = self::getProjectTitle($source);
+  }
+
+  /**
+   * Returns an Updater of the appropriate type depending on the source.
+   *
+   * If a directory is provided which contains a module, will return a
+   * ModuleUpdater.
+   *
+   * @param string $source
+   *   Directory of a Drupal project.
+   *
+   * @return \Drupal\Core\Updater\Updater
+   *   A new Drupal\Core\Updater\Updater object.
+   *
+   * @throws \Drupal\Core\Updater\UpdaterException
+   */
+  public static function factory($source) {
+    if (is_dir($source)) {
+      $updater = self::getUpdaterFromDirectory($source);
+    }
+    else {
+      throw new UpdaterException(t('Unable to determine the type of the source directory.'));
+    }
+    return new $updater($source);
+  }
+
+  /**
+   * Determines which Updater class can operate on the given directory.
+   *
+   * @param string $directory
+   *   Extracted Drupal project.
+   *
+   * @return string
+   *   The class name which can work with this project type.
+   *
+   * @throws \Drupal\Core\Updater\UpdaterException
+   */
+  public static function getUpdaterFromDirectory($directory) {
+    // Gets a list of possible implementing classes.
+    $updaters = drupal_get_updaters();
+    foreach ($updaters as $updater) {
+      $class = $updater['class'];
+      if (call_user_func(array($class, 'canUpdateDirectory'), $directory)) {
+        return $class;
+      }
+    }
+    throw new UpdaterException(t('Cannot determine the type of project.'));
+  }
+
+  /**
+   * Determines what the most important (or only) info file is in a directory.
+   *
+   * Since there is no enforcement of which info file is the project's "main"
+   * info file, this will get one with the same name as the directory, or the
+   * first one it finds.  Not ideal, but needs a larger solution.
+   *
+   * @param string $directory
+   *   Directory to search in.
+   *
+   * @return string
+   *   Path to the info file.
+   */
+  public static function findInfoFile($directory) {
+    $info_files = file_scan_directory($directory, '/.*\.info.yml$/');
+    if (!$info_files) {
+      return FALSE;
+    }
+    foreach ($info_files as $info_file) {
+      if (Unicode::substr($info_file->filename, 0, -9) == drupal_basename($directory)) {
+        // Info file Has the same name as the directory, return it.
+        return $info_file->uri;
+      }
+    }
+    // Otherwise, return the first one.
+    $info_file = array_shift($info_files);
+    return $info_file->uri;
+  }
+
+  /**
+   * Get Extension information from directory.
+   *
+   * @param string $directory
+   *   Directory to search in.
+   *
+   * @return array
+   *   Extension info.
+   *
+   * @throws \Drupal\Core\Updater\UpdaterException
+   *   If the info parser does not provide any info.
+   */
+  protected static function getExtensionInfo($directory) {
+    $info_file = static::findInfoFile($directory);
+    $info = \Drupal::service('info_parser')->parse($info_file);
+    if (empty($info)) {
+      throw new UpdaterException(t('Unable to parse info file: %info_file.', ['%info_file' => $info_file]));
+    }
+
+    return $info;
+  }
+
+  /**
+   * Gets the name of the project directory (basename).
+   *
+   * @todo It would be nice, if projects contained an info file which could
+   *   provide their canonical name.
+   *
+   * @param string $directory
+   *
+   * @return string
+   *   The name of the project.
+   */
+  public static function getProjectName($directory) {
+    return drupal_basename($directory);
+  }
+
+  /**
+   * Returns the project name from a Drupal info file.
+   *
+   * @param string $directory
+   *   Directory to search for the info file.
+   *
+   * @return string
+   *   The title of the project.
+   *
+   * @throws \Drupal\Core\Updater\UpdaterException
+   */
+  public static function getProjectTitle($directory) {
+    $info_file = self::findInfoFile($directory);
+    $info = \Drupal::service('info_parser')->parse($info_file);
+    if (empty($info)) {
+      throw new UpdaterException(t('Unable to parse info file: %info_file.', array('%info_file' => $info_file)));
+    }
+    return $info['name'];
+  }
+
+  /**
+   * Stores the default parameters for the Updater.
+   *
+   * @param array $overrides
+   *   An array of overrides for the default parameters.
+   *
+   * @return array
+   *   An array of configuration parameters for an update or install operation.
+   */
+  protected function getInstallArgs($overrides = array()) {
+    $args = array(
+      'make_backup' => FALSE,
+      'install_dir' => $this->getInstallDirectory(),
+      'backup_dir'  => $this->getBackupDir(),
+    );
+    return array_merge($args, $overrides);
+  }
+
+  /**
+   * Updates a Drupal project and returns a list of next actions.
+   *
+   * @param \Drupal\Core\FileTransfer\FileTransfer $filetransfer
+   *   Object that is a child of FileTransfer. Used for moving files
+   *   to the server.
+   * @param array $overrides
+   *   An array of settings to override defaults; see self::getInstallArgs().
+   *
+   * @return array
+   *   An array of links which the user may need to complete the update
+   *
+   * @throws \Drupal\Core\Updater\UpdaterException
+   * @throws \Drupal\Core\Updater\UpdaterFileTransferException
+   */
+  public function update(&$filetransfer, $overrides = array()) {
+    try {
+      // Establish arguments with possible overrides.
+      $args = $this->getInstallArgs($overrides);
+
+      // Take a Backup.
+      if ($args['make_backup']) {
+        $this->makeBackup($filetransfer, $args['install_dir'], $args['backup_dir']);
+      }
+
+      if (!$this->name) {
+        // This is bad, don't want to delete the install directory.
+        throw new UpdaterException(t('Fatal error in update, cowardly refusing to wipe out the install directory.'));
+      }
+
+      // Make sure the installation parent directory exists and is writable.
+      $this->prepareInstallDirectory($filetransfer, $args['install_dir']);
+
+      // Note: If the project is installed in the top-level, it will not be
+      // deleted. It will be installed in sites/default as that will override
+      // the top-level reference and not break other sites which are using it.
+      if (is_dir($args['install_dir'] . '/' . $this->name)) {
+        // Remove the existing installed file.
+        $filetransfer->removeDirectory($args['install_dir'] . '/' . $this->name);
+      }
+
+      // Copy the directory in place.
+      $filetransfer->copyDirectory($this->source, $args['install_dir']);
+
+      // Make sure what we just installed is readable by the web server.
+      $this->makeWorldReadable($filetransfer, $args['install_dir'] . '/' . $this->name);
+
+      // Run the updates.
+      // @todo Decide if we want to implement this.
+      $this->postUpdate();
+
+      // For now, just return a list of links of things to do.
+      return $this->postUpdateTasks();
+    }
+    catch (FileTransferException $e) {
+      throw new UpdaterFileTransferException(t('File Transfer failed, reason: !reason', array('!reason' => strtr($e->getMessage(), $e->arguments))));
+    }
+  }
+
+  /**
+   * Installs a Drupal project, returns a list of next actions.
+   *
+   * @param \Drupal\Core\FileTransfer\FileTransfer $filetransfer
+   *   Object that is a child of FileTransfer.
+   * @param array $overrides
+   *   An array of settings to override defaults; see self::getInstallArgs().
+   *
+   * @return array
+   *   An array of links which the user may need to complete the install.
+   *
+   * @throws \Drupal\Core\Updater\UpdaterFileTransferException
+   */
+  public function install(&$filetransfer, $overrides = array()) {
+    try {
+      // Establish arguments with possible overrides.
+      $args = $this->getInstallArgs($overrides);
+
+      // Make sure the installation parent directory exists and is writable.
+      $this->prepareInstallDirectory($filetransfer, $args['install_dir']);
+
+      // Copy the directory in place.
+      $filetransfer->copyDirectory($this->source, $args['install_dir']);
+
+      // Make sure what we just installed is readable by the web server.
+      $this->makeWorldReadable($filetransfer, $args['install_dir'] . '/' . $this->name);
+
+      // Potentially enable something?
+      // @todo Decide if we want to implement this.
+      $this->postInstall();
+      // For now, just return a list of links of things to do.
+      return $this->postInstallTasks();
+    }
+    catch (FileTransferException $e) {
+      throw new UpdaterFileTransferException(t('File Transfer failed, reason: !reason', array('!reason' => strtr($e->getMessage(), $e->arguments))));
+    }
+  }
+
+  /**
+   * Makes sure the installation parent directory exists and is writable.
+   *
+   * @param \Drupal\Core\FileTransfer\FileTransfer $filetransfer
+   *   Object which is a child of FileTransfer.
+   * @param string $directory
+   *   The installation directory to prepare.
+   *
+   * @throws \Drupal\Core\Updater\UpdaterException
+   */
+  public function prepareInstallDirectory(&$filetransfer, $directory) {
+    // Make the parent dir writable if need be and create the dir.
+    if (!is_dir($directory)) {
+      $parent_dir = dirname($directory);
+      if (!is_writable($parent_dir)) {
+        @chmod($parent_dir, 0755);
+        // It is expected that this will fail if the directory is owned by the
+        // FTP user. If the FTP user == web server, it will succeed.
+        try {
+          $filetransfer->createDirectory($directory);
+          $this->makeWorldReadable($filetransfer, $directory);
+        }
+        catch (FileTransferException $e) {
+          // Probably still not writable. Try to chmod and do it again.
+          // @todo Make a new exception class so we can catch it differently.
+          try {
+            $old_perms = substr(sprintf('%o', fileperms($parent_dir)), -4);
+            $filetransfer->chmod($parent_dir, 0755);
+            $filetransfer->createDirectory($directory);
+            $this->makeWorldReadable($filetransfer, $directory);
+            // Put the permissions back.
+            $filetransfer->chmod($parent_dir, intval($old_perms, 8));
+          }
+          catch (FileTransferException $e) {
+            $message = t($e->getMessage(), $e->arguments);
+            $throw_message = t('Unable to create %directory due to the following: %reason', array('%directory' => $directory, '%reason' => $message));
+            throw new UpdaterException($throw_message);
+          }
+        }
+        // Put the parent directory back.
+        @chmod($parent_dir, 0555);
+      }
+    }
+  }
+
+  /**
+   * Ensures that a given directory is world readable.
+   *
+   * @param \Drupal\Core\FileTransfer\FileTransfer $filetransfer
+   *   Object which is a child of FileTransfer.
+   * @param string $path
+   *   The file path to make world readable.
+   * @param bool $recursive
+   *   If the chmod should be applied recursively.
+   */
+  public function makeWorldReadable(&$filetransfer, $path, $recursive = TRUE) {
+    if (!is_executable($path)) {
+      // Set it to read + execute.
+      $new_perms = substr(sprintf('%o', fileperms($path)), -4, -1) . "5";
+      $filetransfer->chmod($path, intval($new_perms, 8), $recursive);
+    }
+  }
+
+  /**
+   * Performs a backup.
+   *
+   * @param \Drupal\Core\FileTransfer\FileTransfer $filetransfer
+   *   Object which is a child of FileTransfer.
+   * @param string $from
+   *   The file path to copy from.
+   * @param string $to
+   *   The file path to copy to.
+   *
+   * @todo Not implemented: https://www.drupal.org/node/2474355
+   */
+  public function makeBackup(FileTransfer $filetransfer, $from, $to) {
+  }
+
+  /**
+   * Returns the full path to a directory where backups should be written.
+   */
+  public function getBackupDir() {
+    return file_stream_wrapper_get_instance_by_scheme('temporary')->getDirectoryPath();
+  }
+
+  /**
+   * Performs actions after new code is updated.
+   */
+  public function postUpdate() {
+  }
+
+  /**
+   * Performs actions after installation.
+   */
+  public function postInstall() {
+  }
+
+  /**
+   * Returns an array of links to pages that should be visited post operation.
+   *
+   * @return array
+   *   Links which provide actions to take after the install is finished.
+   */
+  public function postInstallTasks() {
+    return array();
+  }
+
+  /**
+   * Returns an array of links to pages that should be visited post operation.
+   *
+   * @return array
+   *   Links which provide actions to take after the update is finished.
+   */
+  public function postUpdateTasks() {
+    return array();
+  }
+}

core/lib/Drupal/Core/Updater/UpdaterException.php

@@ -0,0 +1,18 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Updater\UpdaterException.
+ */
+
+namespace Drupal\Core\Updater;
+
+/**
+ * Defines a Exception class for the Drupal\Core\Updater\Updater class
+ * hierarchy.
+ *
+ * This is identical to the base Exception class, we just give it a more
+ * specific name so that call sites that want to tell the difference can
+ * specifically catch these exceptions and treat them differently.
+ */
+class UpdaterException extends \Exception {}

core/lib/Drupal/Core/Updater/UpdaterFileTransferException.php

@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Updater\UpdaterFileTransferException.
+ */
+
+namespace Drupal\Core\Updater;
+
+/**
+ * Defines a child class of Drupal\Core\Updater\UpdaterException that indicates
+ * a Drupal\Core\FileTransfer\FileTransfer exception.
+ *
+ * We have to catch Drupal\Core\FileTransfer\FileTransfer exceptions
+ * and wrap those in t(), since Drupal\Core\FileTransfer\FileTransfer
+ * is so low-level that it doesn't use any Drupal APIs and none of the strings
+ * are translated.
+ */
+class UpdaterFileTransferException extends UpdaterException {
+}

core/lib/Drupal/Core/Updater/UpdaterInterface.php

@@ -0,0 +1,64 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Updater\UpdaterInterface.
+ */
+
+namespace Drupal\Core\Updater;
+
+/**
+ * Defines an interface for a class which can update a Drupal project.
+ *
+ * An Updater currently serves the following purposes:
+ *   - It can take a given directory, and determine if it can operate on it.
+ *   - It can move the contents of that directory into the appropriate place
+ *     on the system using FileTransfer classes.
+ *   - It can return a list of "next steps" after an update or install.
+ *   - In the future, it will most likely perform some of those steps as well.
+ */
+interface UpdaterInterface {
+
+  /**
+   * Checks if the project is installed.
+   *
+   * @return bool
+   */
+  public function isInstalled();
+
+  /**
+   * Returns the system name of the project.
+   *
+   * @param string $directory
+   *  A directory containing a project.
+   */
+  public static function getProjectName($directory);
+
+  /**
+   * Returns the path to the default install location.
+   *
+   * @return string
+   *   An absolute path to the default install location.
+   */
+  public function getInstallDirectory();
+
+  /**
+   * Determines if the Updater can handle the project provided in $directory.
+   *
+   * @param string $directory
+   *
+   * @return bool
+   *   TRUE if the project is installed, FALSE if not.
+   */
+  public static function canUpdateDirectory($directory);
+
+  /**
+   * Actions to run after an install has occurred.
+   */
+  public function postInstall();
+
+  /**
+   * Actions to run after an update has occurred.
+   */
+  public function postUpdate();
+}