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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <map>
#include <string>
#include <string_view>
#include <vector>
#include <android-base/file.h>
#include <ziparchive/zip_archive.h>
// This class represents the mount information for each line in a fstab file.
class FstabInfo {
public:
FstabInfo(std::string blockdev_name, std::string mount_point, std::string fs_type)
: blockdev_name(std::move(blockdev_name)),
mount_point(std::move(mount_point)),
fs_type(std::move(fs_type)) {}
std::string blockdev_name;
std::string mount_point;
std::string fs_type;
};
// This class parses a target file from a zip file or an extracted directory. It also provides the
// function to read the its content for simulation.
class TargetFile {
public:
TargetFile(std::string path, bool extracted_input)
: path_(std::move(path)), extracted_input_(extracted_input) {}
// Opens the input target file (or extracted directory) and parses the misc_info.txt.
bool Open();
// Parses the build properties in all possible locations and save them in |props_map|
bool GetBuildProps(std::map<std::string, std::string, std::less<>>* props_map) const;
// Parses the fstab and save the information about each partition to mount into |fstab_info_list|.
bool ParseFstabInfo(std::vector<FstabInfo>* fstab_info_list) const;
// Returns true if the given entry exists in the target file.
bool EntryExists(const std::string_view name) const;
// Extracts the image file |entry_name|. Returns true on success.
bool ExtractImage(const std::string_view entry_name, const FstabInfo& fstab_info,
const std::string_view work_dir, TemporaryFile* image_file) const;
private:
// Wrapper functions to read the entry from either the zipped target-file, or the extracted input
// directory.
bool ReadEntryToString(const std::string_view name, std::string* content) const;
bool ExtractEntryToTempFile(const std::string_view name, TemporaryFile* temp_file) const;
std::string path_; // Path to the zipped target-file or an extracted directory.
bool extracted_input_; // True if the target-file has been extracted.
ZipArchiveHandle handle_{ nullptr };
// The properties under META/misc_info.txt
std::map<std::string, std::string, std::less<>> misc_info_;
};
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