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//
// Copyright (C) 2020 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.
#include "misc_info.h"
#include <algorithm>
#include <string>
#include <vector>
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include "common/libs/utils/contains.h"
#include "common/libs/utils/result.h"
namespace cuttlefish {
namespace {
constexpr char kDynamicPartitions[] = "dynamic_partition_list";
constexpr char kGoogleDynamicPartitions[] = "google_dynamic_partitions";
constexpr char kSuperPartitionGroups[] = "super_partition_groups";
} // namespace
Result<MiscInfo> ParseMiscInfo(const std::string& misc_info_contents) {
auto lines = android::base::Split(misc_info_contents, "\n");
MiscInfo misc_info;
for (auto& line : lines) {
line = android::base::Trim(line);
if (line.size() == 0) {
continue;
}
auto eq_pos = line.find('=');
if (eq_pos == std::string::npos) {
LOG(WARNING) << "Line in unknown format: \"" << line << "\"";
continue;
}
// Not using android::base::Split here to only capture the first =
const auto key = android::base::Trim(line.substr(0, eq_pos));
const auto value = android::base::Trim(line.substr(eq_pos + 1));
const bool duplicate = Contains(misc_info, key) && misc_info[key] != value;
CF_EXPECTF(!duplicate,
"Duplicate key with different value. key:\"{}\", previous "
"value:\"{}\", this value:\"{}\"",
key, misc_info[key], value);
misc_info[key] = value;
}
return misc_info;
}
std::string WriteMiscInfo(const MiscInfo& misc_info) {
std::stringstream out;
for (const auto& entry : misc_info) {
out << entry.first << "=" << entry.second << "\n";
}
return out.str();
}
std::vector<std::string> SuperPartitionComponents(const MiscInfo& info) {
auto value_it = info.find(kDynamicPartitions);
if (value_it == info.end()) {
return {};
}
auto components = android::base::Split(value_it->second, " ");
for (auto& component : components) {
component = android::base::Trim(component);
}
components.erase(std::remove(components.begin(), components.end(), ""),
components.end());
return components;
}
bool SetSuperPartitionComponents(const std::vector<std::string>& components,
MiscInfo* misc_info) {
auto super_partition_groups = misc_info->find(kSuperPartitionGroups);
if (super_partition_groups == misc_info->end()) {
LOG(ERROR) << "Failed to find super partition groups in misc_info";
return false;
}
// Remove all existing update groups in misc_info
auto update_groups =
android::base::Split(super_partition_groups->second, " ");
for (const auto& group_name : update_groups) {
auto partition_list = android::base::StringPrintf("super_%s_partition_list",
group_name.c_str());
auto partition_size =
android::base::StringPrintf("super_%s_group_size", group_name.c_str());
for (const auto& key : {partition_list, partition_size}) {
auto it = misc_info->find(key);
if (it == misc_info->end()) {
LOG(ERROR) << "Failed to find " << key << " in misc_info";
return false;
}
misc_info->erase(it);
}
}
// For merged target-file, put all dynamic partitions under the
// google_dynamic_partitions update group.
// TODO(xunchang) use different update groups for system and vendor images.
(*misc_info)[kDynamicPartitions] = android::base::Join(components, " ");
(*misc_info)[kSuperPartitionGroups] = kGoogleDynamicPartitions;
std::string partitions_list_key = android::base::StringPrintf(
"super_%s_partition_list", kGoogleDynamicPartitions);
(*misc_info)[partitions_list_key] = android::base::Join(components, " ");
// Use the entire super partition as the group size
std::string group_size_key = android::base::StringPrintf(
"super_%s_group_size", kGoogleDynamicPartitions);
auto super_size_it = misc_info->find("super_partition_size");
if (super_size_it == misc_info->end()) {
LOG(ERROR) << "Failed to find super partition size";
return false;
}
(*misc_info)[group_size_key] = super_size_it->second;
return true;
}
} // namespace cuttlefish
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