| // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_INSTALLER_UTIL_DELETE_TREE_WORK_ITEM_H_ |
| #define CHROME_INSTALLER_UTIL_DELETE_TREE_WORK_ITEM_H_ |
| |
| #include "base/files/file_path.h" |
| #include "base/files/scoped_temp_dir.h" |
| #include "chrome/installer/util/work_item.h" |
| |
| // A WorkItem subclass that recursively deletes a file system hierarchy at the |
| // given root path. The file system hierarchy could be a single file, or a |
| // directory. |
| // The file system hierarchy to be deleted can have one or more key files. If |
| // specified, deletion will be performed only if all key files are not in use. |
| class DeleteTreeWorkItem : public WorkItem { |
| public: |
| ~DeleteTreeWorkItem() override; |
| |
| private: |
| friend class WorkItem; |
| |
| // |root_path| will be moved to |temp_path| (rather than copied there and then |
| // deleted). For best results in this case, |root_path| and |temp_path| |
| // should be on the same volume; otherwise, the move will be simulated |
| // by a copy-and-delete operation. |
| DeleteTreeWorkItem(const base::FilePath& root_path, |
| const base::FilePath& temp_path); |
| |
| // WorkItem: |
| bool DoImpl() override; |
| void RollbackImpl() override; |
| |
| // Return temporary path for work based on |backup_path_| and |root_path_|. |
| const base::FilePath& GetBackupPath(); |
| |
| // Attempts to delete |root_path_|. Returns true on success. |
| bool DeleteRoot(); |
| |
| // Attempts to move |root_path_| to backup. Returns true on success. |
| bool MoveRootToBackup(); |
| |
| // Root path to delete. |
| const base::FilePath root_path_; |
| |
| // Temporary directory that can be used. |
| const base::FilePath temp_path_; |
| |
| // The temporary directory into which the original root_path_ has been moved. |
| base::ScopedTempDir backup_dir_; |
| |
| // Caches the return value of GetBackupPath(). This is empty if |backup_dir_| |
| // has not been created. |
| base::FilePath backup_path_; |
| |
| // Set to true once root_path_ has been moved into backup_path_. |
| bool moved_to_backup_ = false; |
| }; |
| |
| #endif // CHROME_INSTALLER_UTIL_DELETE_TREE_WORK_ITEM_H_ |