downgrade_manager.cc | Explore in Territory

// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/downgrade/downgrade_manager.h"

#include <iterator>
#include <optional>
#include <string_view>
#include <utility>

#include "base/command_line.h"
#include "base/enterprise_util.h"
#include "base/files/file_enumerator.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/logging.h"
#include "base/metrics/histogram_functions.h"
#include "base/ranges/algorithm.h"
#include "base/strings/strcat.h"
#include "base/strings/string_util.h"
#include "base/syslog_logging.h"
#include "base/task/thread_pool.h"
#include "base/version.h"
#include "build/build_config.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/downgrade/downgrade_utils.h"
#include "chrome/browser/downgrade/snapshot_manager.h"
#include "chrome/browser/downgrade/user_data_downgrade.h"
#include "chrome/common/channel_info.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/pref_names.h"
#include "components/enterprise/browser/controller/browser_dm_token_storage.h"
#include "components/prefs/pref_service.h"
#include "components/version_info/version_info.h"
#include "components/version_info/version_info_values.h"
#include "content/public/browser/browser_thread.h"

#if BUILDFLAG(IS_WIN)
#include "chrome/installer/util/install_util.h"
#endif

namespace downgrade {

namespace {

bool g_snapshots_enabled_for_testing = …;

// Moves the contents of a User Data directory at |source| to |target|, with the
// exception of files/directories that should be left behind for a full data
// wipe. Returns no value if the target directory could not be created, or the
// number of items that could not be moved.
void MoveUserData(const base::FilePath& source, const base::FilePath& target) { … }

// Renames |disk_cache_dir| in its containing folder. If that fails, an attempt
// is made to move its contents.
void MoveCache(const base::FilePath& disk_cache_dir) { … }

// Deletes all subdirectories in |dir| named |name|*.CHROME_DELETE.
void DeleteAllRenamedUserDirectories(const base::FilePath& dir,
                                     const base::FilePath& name) { … }

// Deletes all moved User Data, Snapshots and Cache directories for the given
// dirs.
void DeleteMovedUserData(const base::FilePath& user_data_dir,
                         const base::FilePath& disk_cache_dir) { … }

bool UserDataSnapshotEnabled() { … }

#if BUILDFLAG(IS_WIN)
bool IsAdministratorDrivenDowngrade(uint16_t current_milestone) {
  const auto downgrade_version = InstallUtil::GetDowngradeVersion();
  return downgrade_version &&
         downgrade_version->components()[0] > current_milestone;
}
#endif

}  // namespace

bool DowngradeManager::PrepareUserDataDirectoryForCurrentVersion(
    const base::FilePath& user_data_dir) { … }

void DowngradeManager::UpdateLastVersion(const base::FilePath& user_data_dir) { … }

void DowngradeManager::DeleteMovedUserDataSoon(
    const base::FilePath& user_data_dir) { … }

void DowngradeManager::ProcessDowngrade(const base::FilePath& user_data_dir) { … }

// static
void DowngradeManager::EnableSnapshotsForTesting(bool enable) { … }

// static
DowngradeManager::Type DowngradeManager::GetDowngradeType(
    const base::FilePath& user_data_dir,
    const base::Version& current_version,
    const base::Version& last_version) { … }

// static
DowngradeManager::Type DowngradeManager::GetDowngradeTypeWithSnapshot(
    const base::FilePath& user_data_dir,
    const base::Version& current_version,
    const base::Version& last_version) { … }

}  // namespace downgrade
chromium/chrome/browser/downgrade/downgrade_manager.cc
