5766943f55
Added a FilterChain that can apply multiple filter steps to an APK file as it is being written to disk. The first filter applied is by ABI. If a library in the APK does not match the filter it is skipped. Added an AbiFilter that keeps files that are either not native libs or are for the set of wanted ABIs Test: ran unit tests locally Test: ran against an APK with ARM and x68 libs and diffed the results Change-Id: I3fb901d3de3513e85f2a2763a8e4487a28ed4881
132 lines
4.5 KiB
C++
132 lines
4.5 KiB
C++
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "LoadedApk.h"
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#include "ResourceValues.h"
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#include "ValueVisitor.h"
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#include "flatten/Archive.h"
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#include "flatten/TableFlattener.h"
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#include "io/BigBufferInputStream.h"
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#include "io/Util.h"
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namespace aapt {
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std::unique_ptr<LoadedApk> LoadedApk::LoadApkFromPath(IAaptContext* context,
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const android::StringPiece& path) {
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Source source(path);
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std::string error;
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std::unique_ptr<io::ZipFileCollection> apk = io::ZipFileCollection::Create(path, &error);
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if (!apk) {
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context->GetDiagnostics()->Error(DiagMessage(source) << error);
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return {};
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}
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io::IFile* file = apk->FindFile("resources.arsc");
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if (!file) {
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context->GetDiagnostics()->Error(DiagMessage(source) << "no resources.arsc found");
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return {};
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}
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std::unique_ptr<io::IData> data = file->OpenAsData();
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if (!data) {
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context->GetDiagnostics()->Error(DiagMessage(source) << "could not open resources.arsc");
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return {};
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}
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std::unique_ptr<ResourceTable> table = util::make_unique<ResourceTable>();
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BinaryResourceParser parser(context, table.get(), source, data->data(), data->size(), apk.get());
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if (!parser.Parse()) {
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return {};
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}
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return util::make_unique<LoadedApk>(source, std::move(apk), std::move(table));
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}
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bool LoadedApk::WriteToArchive(IAaptContext* context, const TableFlattenerOptions& options,
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IArchiveWriter* writer) {
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FilterChain empty;
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return WriteToArchive(context, options, &empty, writer);
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}
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bool LoadedApk::WriteToArchive(IAaptContext* context, const TableFlattenerOptions& options,
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FilterChain* filters, IArchiveWriter* writer) {
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std::set<std::string> referenced_resources;
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// List the files being referenced in the resource table.
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for (auto& pkg : table_->packages) {
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for (auto& type : pkg->types) {
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for (auto& entry : type->entries) {
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for (auto& config_value : entry->values) {
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FileReference* file_ref = ValueCast<FileReference>(config_value->value.get());
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if (file_ref) {
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referenced_resources.insert(*file_ref->path);
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}
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}
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}
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}
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}
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std::unique_ptr<io::IFileCollectionIterator> iterator = apk_->Iterator();
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while (iterator->HasNext()) {
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io::IFile* file = iterator->Next();
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std::string path = file->GetSource().path;
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// The name of the path has the format "<zip-file-name>@<path-to-file>".
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path = path.substr(path.find("@") + 1);
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// Skip resources that are not referenced if requested.
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if (path.find("res/") == 0 && referenced_resources.find(path) == referenced_resources.end()) {
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if (context->IsVerbose()) {
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context->GetDiagnostics()->Note(DiagMessage()
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<< "Removing resource '" << path << "' from APK.");
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}
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continue;
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}
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if (!filters->Keep(path)) {
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if (context->IsVerbose()) {
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context->GetDiagnostics()->Note(DiagMessage() << "Filtered '" << path << "' from APK.");
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}
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continue;
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}
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// The resource table needs to be re-serialized since it might have changed.
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if (path == "resources.arsc") {
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BigBuffer buffer(4096);
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// TODO(adamlesinski): How to determine if there were sparse entries (and if to encode
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// with sparse entries) b/35389232.
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TableFlattener flattener(options, &buffer);
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if (!flattener.Consume(context, table_.get())) {
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return false;
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}
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io::BigBufferInputStream input_stream(&buffer);
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if (!io::CopyInputStreamToArchive(context, &input_stream, path, ArchiveEntry::kAlign,
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writer)) {
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return false;
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}
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} else {
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uint32_t compression_flags = file->WasCompressed() ? ArchiveEntry::kCompress : 0u;
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if (!io::CopyFileToArchive(context, file, path, compression_flags, writer)) {
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return false;
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}
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}
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}
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return true;
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}
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} // namespace aapt
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