| // 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. |
| |
| #include "chrome/installer/util/move_tree_work_item.h" |
| |
| #include <shlwapi.h> |
| |
| #include "base/file_util.h" |
| #include "base/logging.h" |
| #include "chrome/installer/util/duplicate_tree_detector.h" |
| #include "chrome/installer/util/logging_installer.h" |
| |
| MoveTreeWorkItem::~MoveTreeWorkItem() { |
| } |
| |
| MoveTreeWorkItem::MoveTreeWorkItem(const base::FilePath& source_path, |
| const base::FilePath& dest_path, |
| const base::FilePath& temp_dir, |
| MoveTreeOption duplicate_option) |
| : source_path_(source_path), |
| dest_path_(dest_path), |
| temp_dir_(temp_dir), |
| duplicate_option_(duplicate_option), |
| moved_to_dest_path_(false), |
| moved_to_backup_(false), |
| source_moved_to_backup_(false) { |
| } |
| |
| bool MoveTreeWorkItem::Do() { |
| if (!base::PathExists(source_path_)) { |
| LOG(ERROR) << source_path_.value() << " does not exist"; |
| return false; |
| } |
| |
| // If dest_path_ exists, we can do one of two things: |
| // 1) If the contents of src_path_are already fully contained in dest_path_ |
| // then do nothing and return success. Fully contained means the full |
| // file structure with identical files is contained in dest_path_. For |
| // Chrome, if dest_path_ exists, this is expected to be the common case. |
| // 2) If the contents of src_path_ are NOT fully contained in dest_path_, we |
| // attempt to backup dest_path_ and replace it with src_path_. This will |
| // fail if files in dest_path_ are in use. |
| if (base::PathExists(dest_path_)) { |
| // Generate a backup path that can keep the original files under dest_path_. |
| if (!backup_path_.CreateUniqueTempDirUnderPath(temp_dir_)) { |
| PLOG(ERROR) << "Failed to get backup path in folder " |
| << temp_dir_.value(); |
| return false; |
| } |
| base::FilePath backup = backup_path_.path().Append(dest_path_.BaseName()); |
| |
| if (duplicate_option_ == CHECK_DUPLICATES) { |
| if (installer::IsIdenticalFileHierarchy(source_path_, dest_path_)) { |
| // The files we are moving are already present in the destination path. |
| // We most likely don't need to do anything. As such, just move the |
| // source files to the temp folder as backup. |
| if (base::Move(source_path_, backup)) { |
| source_moved_to_backup_ = true; |
| VLOG(1) << "Moved source " << source_path_.value() |
| << " to backup path " << backup.value(); |
| return true; |
| } else { |
| // We failed to move the source tree to the backup path. This is odd |
| // but just fall through and attempt the regular behaviour as well. |
| LOG(ERROR) << "Failed to backup source " << source_path_.value() |
| << " to backup path " << backup.value() |
| << " for duplicate trees. Trying regular Move instead."; |
| } |
| } else { |
| VLOG(1) << "Source path " << source_path_.value() |
| << " differs from " << dest_path_.value() |
| << ", updating now."; |
| } |
| } |
| |
| if (base::Move(dest_path_, backup)) { |
| moved_to_backup_ = true; |
| VLOG(1) << "Moved destination " << dest_path_.value() |
| << " to backup path " << backup.value(); |
| } else { |
| PLOG(ERROR) << "failed moving " << dest_path_.value() |
| << " to " << backup.value(); |
| return false; |
| } |
| } |
| |
| // Now move source to destination. |
| if (base::Move(source_path_, dest_path_)) { |
| moved_to_dest_path_ = true; |
| VLOG(1) << "Moved source " << source_path_.value() |
| << " to destination " << dest_path_.value(); |
| } else { |
| PLOG(ERROR) << "failed move " << source_path_.value() |
| << " to " << dest_path_.value(); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void MoveTreeWorkItem::Rollback() { |
| if (moved_to_dest_path_ && !base::Move(dest_path_, source_path_)) |
| LOG(ERROR) << "Can not move " << dest_path_.value() |
| << " to " << source_path_.value(); |
| |
| base::FilePath backup = backup_path_.path().Append(dest_path_.BaseName()); |
| if (moved_to_backup_ && !base::Move(backup, dest_path_)) { |
| LOG(ERROR) << "failed move " << backup.value() |
| << " to " << dest_path_.value(); |
| } |
| |
| if (source_moved_to_backup_ && !base::Move(backup, source_path_)) { |
| LOG(ERROR) << "Can not restore " << backup.value() |
| << " to " << source_path_.value(); |
| } |
| } |