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/*
* Copyright (C) 2016 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 "LoadedApk.h"
#include "ResourceValues.h"
#include "ValueVisitor.h"
#include "flatten/Archive.h"
#include "flatten/TableFlattener.h"
#include "io/BigBufferInputStream.h"
namespace aapt {
std::unique_ptr<LoadedApk> LoadedApk::LoadApkFromPath(IAaptContext* context,
const android::StringPiece& path) {
Source source(path);
std::string error;
std::unique_ptr<io::ZipFileCollection> apk = io::ZipFileCollection::Create(path, &error);
if (!apk) {
context->GetDiagnostics()->Error(DiagMessage(source) << error);
return {};
}
io::IFile* file = apk->FindFile("resources.arsc");
if (!file) {
context->GetDiagnostics()->Error(DiagMessage(source) << "no resources.arsc found");
return {};
}
std::unique_ptr<io::IData> data = file->OpenAsData();
if (!data) {
context->GetDiagnostics()->Error(DiagMessage(source) << "could not open resources.arsc");
return {};
}
std::unique_ptr<ResourceTable> table = util::make_unique<ResourceTable>();
BinaryResourceParser parser(context, table.get(), source, data->data(), data->size());
if (!parser.Parse()) {
return {};
}
return util::make_unique<LoadedApk>(source, std::move(apk), std::move(table));
}
bool LoadedApk::WriteToArchive(IAaptContext* context, const TableFlattenerOptions& options,
IArchiveWriter* writer) {
std::set<std::string> referenced_resources;
// List the files being referenced in the resource table.
for (auto& pkg : table_->packages) {
for (auto& type : pkg->types) {
for (auto& entry : type->entries) {
for (auto& config_value : entry->values) {
FileReference* file_ref = ValueCast<FileReference>(config_value->value.get());
if (file_ref) {
referenced_resources.insert(*file_ref->path);
}
}
}
}
}
std::unique_ptr<io::IFileCollectionIterator> iterator = apk_->Iterator();
while (iterator->HasNext()) {
io::IFile* file = iterator->Next();
std::string path = file->GetSource().path;
// The name of the path has the format "<zip-file-name>@<path-to-file>".
path = path.substr(path.find("@") + 1);
// Skip resources that are not referenced if requested.
if (path.find("res/") == 0 && referenced_resources.find(path) == referenced_resources.end()) {
if (context->IsVerbose()) {
context->GetDiagnostics()->Note(DiagMessage()
<< "Removing resource '" << path << "' from APK.");
}
continue;
}
// The resource table needs to be re-serialized since it might have changed.
if (path == "resources.arsc") {
BigBuffer buffer(4096);
// TODO(adamlesinski): How to determine if there were sparse entries (and if to encode
// with sparse entries) b/35389232.
TableFlattener flattener(options, &buffer);
if (!flattener.Consume(context, table_.get())) {
return false;
}
io::BigBufferInputStream input_stream(&buffer);
if (!writer->WriteFile(path, ArchiveEntry::kAlign, &input_stream)) {
context->GetDiagnostics()->Error(DiagMessage()
<< "Error when writing file '" << path << "' in APK.");
return false;
}
continue;
}
std::unique_ptr<io::IData> data = file->OpenAsData();
uint32_t compression_flags = file->WasCompressed() ? ArchiveEntry::kCompress : 0u;
if (!writer->WriteFile(path, compression_flags, data.get())) {
context->GetDiagnostics()->Error(DiagMessage()
<< "Error when writing file '" << path << "' in APK.");
return false;
}
}
return true;
}
} // namespace aapt
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