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diff --git a/vendor/drush/drush/commands/pm/version_control/bzr.inc b/vendor/drush/drush/commands/pm/version_control/bzr.inc
new file mode 100644
index 000000000..22bfb7a41
--- /dev/null
+++ b/vendor/drush/drush/commands/pm/version_control/bzr.inc
@@ -0,0 +1,137 @@
+<?php
+
+/**
+ * @file
+ * Drush pm Bazaar extension
+ */
+
+use Drush\Log\LogLevel;
+
+class drush_version_control_bzr implements drush_version_control {
+
+  /**
+   * Implementation of pre_update().
+   *
+   * Check that the project or drupal core directory looks clean
+   */
+  public function pre_update(&$project, $items_to_test = array()) {
+    // Bazaar needs a list of items to test within the given project.
+    // If $items_to_test is empty we need to force it to test the project
+    // directory itself --once we've cd'ed to it.
+    if (empty($items_to_test)) {
+      $items_to_test = array('.' => '.');
+    }
+    $args = array_keys($items_to_test);
+    array_unshift($args, 'bzr status --short' . str_repeat(' %s', count($args)));
+    array_unshift($args, $project['full_project_path']);
+    if (call_user_func_array('drush_shell_cd_and_exec', $args)) {
+      $output = preg_grep('/^[\sRCP][\sNDKM][\s\*]/', drush_shell_exec_output());
+      if (!empty($output)) {
+        return drush_set_error('DRUSH_PM_BZR_LOCAL_CHANGES', dt("The Bazaar working copy at !path appears to have uncommitted changes (see below). Please commit or revert these changes before continuing:\n!output", array('!path' => $project['full_project_path'], '!output' => implode("\n", $output))));
+      }
+    }
+    else {
+      return drush_set_error('DRUSH_PM_BZR_NOT_FOUND', dt("Drush was unable to get the bzr status on !path. Check that you have Bazaar \ninstalled and that this directory is a Bazaar working copy.\nThe specific errors are below:\n!errors", array('!path' => $project['full_project_path'], '!errors' => implode("\n", drush_shell_exec_output()))));
+    }
+    return TRUE;
+  }
+
+  /**
+   * Implementation of rollback().
+   */
+  public function rollback($project) {
+    if (drush_shell_exec('bzr revert %s', $project['full_project_path'])) {
+      $output = drush_shell_exec_output();
+      if (!empty($output)) {
+        return drush_set_error('DRUSH_PM_BZR_LOCAL_CHANGES', dt("The Bazaar working copy at !path appears to have uncommitted changes (see below). Please commit or revert these changes before continuing:\n!output", array('!path' => $project['full_project_path'], '!output' => implode("\n", $output))));
+      }
+    }
+    else {
+      return drush_set_error('DRUSH_PM_BZR_NOT_FOUND', dt("Drush was unable to get the Bazaar status on !path. Check that you have Bazaar \ninstalled and that this directory is a Bazaar working copy.\nThe specific errors are below:\n!errors", array('!path' => $project['full_project_path'], '!errors' => implode("\n", drush_shell_exec_output()))));
+    }
+  }
+
+  /**
+   * Implementation of post_update().
+   */
+  public function post_update($project) {
+    if ($this->sync($project)) {
+      // Only attempt commit on a sucessful sync
+      $this->commit($project);
+    }
+  }
+
+  /**
+   * Implementation of post_download().
+   */
+  public function post_download($project) {
+    if ($this->sync($project)) {
+      // Only attempt commit on a sucessful sync
+      $this->commit($project);
+    }
+  }
+
+  /**
+   * Automatically add any unversioned files to Bazaar and remove any files
+   * that have been deleted on the file system
+   */
+  private function sync($project) {
+    if (drush_get_option('bzrsync')) {
+      $errors = '';
+      $root = array();
+      if (drush_shell_exec('bzr status --short %s', $project['full_project_path'])) {
+        $output = drush_shell_exec_output();
+        // All paths returned by bzr status are relative to the repository root.
+        if (drush_shell_exec('bzr root %s', $project['full_project_path'])) {
+          $root = drush_shell_exec_output();
+        }
+        foreach ($output as $line) {
+          if (preg_match('/^\?\s+(.*)/', $line, $matches)) {
+            $path = $root[0] .'/'. $matches[1];
+            if (!drush_shell_exec('bzr add --no-recurse %s', $path)) {
+              $errors .= implode("\n", drush_shell_exec_output());
+            }
+          }
+          else if (preg_match('/^\s+D\s+(.*)/', $line, $matches)) {
+            $path = $root[0] .'/'. $matches[1];
+            if (!drush_shell_exec('bzr remove %s', $path)) {
+              $errors .= implode("\n", drush_shell_exec_output());
+            }
+          }
+        }
+        if (!empty($errors)) {
+          return drush_set_error('DRUSH_PM_BZR_SYNC_PROBLEMS', dt("Problems were encountered adding or removing files to/from Bazaar.\nThe specific errors are below:\n!errors", array('!errors' => $errors)));
+        }
+      }
+      else {
+        return drush_set_error('DRUSH_PM_BZR_NOT_FOUND', dt("Drush was unable to get the bzr status. Check that you have Bazaar \ninstalled and that the site is a Bazaar working copy.\nThe specific errors are below:\n!errors", array('!errors' => implode("\n", drush_shell_exec_output()))));
+      }
+      return TRUE;
+    }
+  }
+
+  /**
+   * Automatically commit changes to the repository
+   */
+  private function commit($project) {
+    if (drush_get_option('bzrcommit')) {
+      $message = drush_get_option('bzrmessage');
+      if (empty($message)) {
+        $message = dt("Drush automatic commit.\nProject: @name @type\nCommand: @arguments", array('@name' => $project['name'], '@type' => $project['project_type'], '@arguments' => implode(' ', $_SERVER['argv'])));
+      }
+      if (drush_shell_exec('bzr commit --message=%s %s', $message, $project['full_project_path'])) {
+        drush_log(dt('Project committed to Bazaar successfully'), LogLevel::OK);
+      }
+      else {
+        drush_set_error('DRUSH_PM_BZR_COMMIT_PROBLEMS', dt("Problems were encountered committing your changes to Bazaar.\nThe specific errors are below:\n!errors", array('!errors' => implode("\n", drush_shell_exec_output()))));
+      }
+    }
+    else {
+      drush_print(dt("You should consider committing the new code to your Bazaar repository.\nIf this version becomes undesireable, use Bazaar to roll back."));
+    }
+  }
+
+  public static function reserved_files() {
+    return array('.bzr', '.bzrignore', '.bzrtags');
+  }
+}