tools/aapt2/cmd/Optimize.cpp - LeafOS-Project/android_frameworks_base - Gitiles

 /*
  * Copyright (C) 2017 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 "Optimize.h"

 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>

 #include "Diagnostics.h"
 #include "LoadedApk.h"
 #include "ResourceUtils.h"
 #include "SdkConstants.h"
 #include "ValueVisitor.h"
 #include "android-base/file.h"
 #include "android-base/stringprintf.h"
 #include "androidfw/ConfigDescription.h"
 #include "androidfw/IDiagnostics.h"
 #include "androidfw/ResourceTypes.h"
 #include "androidfw/StringPiece.h"
 #include "cmd/Util.h"
 #include "configuration/ConfigurationParser.h"
 #include "filter/AbiFilter.h"
 #include "format/binary/TableFlattener.h"
 #include "format/binary/XmlFlattener.h"
 #include "io/BigBufferStream.h"
 #include "io/Util.h"
 #include "optimize/MultiApkGenerator.h"
 #include "optimize/Obfuscator.h"
 #include "optimize/ResourceDeduper.h"
 #include "optimize/ResourceFilter.h"
 #include "optimize/VersionCollapser.h"
 #include "split/TableSplitter.h"
 #include "util/Files.h"
 #include "util/Util.h"

 using ::aapt::configuration::Abi;
 using ::aapt::configuration::OutputArtifact;
 using ::android::ConfigDescription;
 using ::android::ResTable_config;
 using ::android::StringPiece;
 using ::android::base::ReadFileToString;
 using ::android::base::StringAppendF;
 using ::android::base::StringPrintf;
 using ::android::base::WriteStringToFile;

 namespace aapt {

 class OptimizeContext : public IAaptContext {
  public:
   OptimizeContext() = default;

   PackageType GetPackageType() override {
     // Not important here. Using anything other than kApp adds EXTRA validation, which we want to
     // avoid.
     return PackageType::kApp;
   }

   android::IDiagnostics* GetDiagnostics() override {
     return &diagnostics_;
   }

   NameMangler* GetNameMangler() override {
     UNIMPLEMENTED(FATAL);
     return nullptr;
   }

   const std::string& GetCompilationPackage() override {
     static std::string empty;
     return empty;
   }

   uint8_t GetPackageId() override {
     return 0;
   }

   SymbolTable* GetExternalSymbols() override {
     UNIMPLEMENTED(FATAL);
     return nullptr;
   }

   bool IsVerbose() override {
     return verbose_;
   }

   void SetVerbose(bool val) {
     verbose_ = val;
   }

   void SetMinSdkVersion(int sdk_version) {
     sdk_version_ = sdk_version;
   }

   int GetMinSdkVersion() override {
     return sdk_version_;
   }

   const std::set<std::string>& GetSplitNameDependencies() override {
     UNIMPLEMENTED(FATAL) << "Split Name Dependencies should not be necessary";
     static std::set<std::string> empty;
     return empty;
   }

  private:
   StdErrDiagnostics diagnostics_;
   bool verbose_ = false;
   int sdk_version_ = 0;

   DISALLOW_COPY_AND_ASSIGN(OptimizeContext);
 };

 class Optimizer {
  public:
   Optimizer(OptimizeContext* context, const OptimizeOptions& options)
       : options_(options), context_(context) {
   }

   int Run(std::unique_ptr<LoadedApk> apk) {
     if (context_->IsVerbose()) {
       context_->GetDiagnostics()->Note(android::DiagMessage() << "Optimizing APK...");
     }
     if (!options_.resources_exclude_list.empty()) {
       ResourceFilter filter(options_.resources_exclude_list);
       if (!filter.Consume(context_, apk->GetResourceTable())) {
         context_->GetDiagnostics()->Error(android::DiagMessage() << "failed filtering resources");
         return 1;
       }
     }

     VersionCollapser collapser;
     if (!collapser.Consume(context_, apk->GetResourceTable())) {
       return 1;
     }

     ResourceDeduper deduper;
     if (!deduper.Consume(context_, apk->GetResourceTable())) {
       context_->GetDiagnostics()->Error(android::DiagMessage() << "failed deduping resources");
       return 1;
     }

     if (options_.shorten_resource_paths) {
       Obfuscator obfuscator(options_.table_flattener_options.shortened_path_map);
       if (!obfuscator.Consume(context_, apk->GetResourceTable())) {
         context_->GetDiagnostics()->Error(android::DiagMessage()
                                           << "failed shortening resource paths");
         return 1;
       }
       if (options_.shortened_paths_map_path
           && !WriteShortenedPathsMap(options_.table_flattener_options.shortened_path_map,
                                       options_.shortened_paths_map_path.value())) {
         context_->GetDiagnostics()->Error(android::DiagMessage()
                                           << "failed to write shortened resource paths to file");
         return 1;
       }
     }

     // Adjust the SplitConstraints so that their SDK version is stripped if it is less than or
     // equal to the minSdk.
     options_.split_constraints =
         AdjustSplitConstraintsForMinSdk(context_->GetMinSdkVersion(), options_.split_constraints);

     // Stripping the APK using the TableSplitter. The resource table is modified in place in the
     // LoadedApk.
     TableSplitter splitter(options_.split_constraints, options_.table_splitter_options);
     if (!splitter.VerifySplitConstraints(context_)) {
       return 1;
     }
     splitter.SplitTable(apk->GetResourceTable());

     auto path_iter = options_.split_paths.begin();
     auto split_constraints_iter = options_.split_constraints.begin();
     for (std::unique_ptr<ResourceTable>& split_table : splitter.splits()) {
       if (context_->IsVerbose()) {
         context_->GetDiagnostics()->Note(android::DiagMessage(*path_iter)
                                          << "generating split with configurations '"
                                          << util::Joiner(split_constraints_iter->configs, ", ")
                                          << "'");
       }

       // Generate an AndroidManifest.xml for each split.
       std::unique_ptr<xml::XmlResource> split_manifest =
           GenerateSplitManifest(options_.app_info, *split_constraints_iter);
       std::unique_ptr<IArchiveWriter> split_writer =
           CreateZipFileArchiveWriter(context_->GetDiagnostics(), *path_iter);
       if (!split_writer) {
         return 1;
       }

       if (!WriteSplitApk(split_table.get(), split_manifest.get(), split_writer.get())) {
         return 1;
       }

       ++path_iter;
       ++split_constraints_iter;
     }

     if (options_.apk_artifacts && options_.output_dir) {
       MultiApkGenerator generator{apk.get(), context_};
       MultiApkGeneratorOptions generator_options = {
           options_.output_dir.value(), options_.apk_artifacts.value(),
           options_.table_flattener_options, options_.kept_artifacts};
       if (!generator.FromBaseApk(generator_options)) {
         return 1;
       }
     }

     if (options_.output_path) {
       std::unique_ptr<IArchiveWriter> writer =
           CreateZipFileArchiveWriter(context_->GetDiagnostics(), options_.output_path.value());
       if (!apk->WriteToArchive(context_, options_.table_flattener_options, writer.get())) {
         return 1;
       }
     }

     return 0;
   }

  private:
   bool WriteSplitApk(ResourceTable* table, xml::XmlResource* manifest, IArchiveWriter* writer) {
     android::BigBuffer manifest_buffer(4096);
     XmlFlattener xml_flattener(&manifest_buffer, {});
     if (!xml_flattener.Consume(context_, manifest)) {
       return false;
     }

     io::BigBufferInputStream manifest_buffer_in(&manifest_buffer);
     if (!io::CopyInputStreamToArchive(context_, &manifest_buffer_in, "AndroidManifest.xml",
                                       ArchiveEntry::kCompress, writer)) {
       return false;
     }

     std::map<std::pair<ConfigDescription, StringPiece>, FileReference*> config_sorted_files;
     for (auto& pkg : table->packages) {
       for (auto& type : pkg->types) {
         // Sort by config and name, so that we get better locality in the zip file.
         config_sorted_files.clear();

         for (auto& entry : type->entries) {
           for (auto& config_value : entry->values) {
             auto* file_ref = ValueCast<FileReference>(config_value->value.get());
             if (file_ref == nullptr) {
               continue;
             }

             if (file_ref->file == nullptr) {
               ResourceNameRef name(pkg->name, type->named_type, entry->name);
               context_->GetDiagnostics()->Warn(android::DiagMessage(file_ref->GetSource())
                                                << "file for resource " << name << " with config '"
                                                << config_value->config << "' not found");
               continue;
             }

             const StringPiece entry_name = entry->name;
             config_sorted_files[std::make_pair(config_value->config, entry_name)] = file_ref;
           }
         }

         for (auto& entry : config_sorted_files) {
           FileReference* file_ref = entry.second;
           if (!io::CopyFileToArchivePreserveCompression(context_, file_ref->file, *file_ref->path,
                                                         writer)) {
             return false;
           }
         }
       }
     }

     android::BigBuffer table_buffer(4096);
     TableFlattener table_flattener(options_.table_flattener_options, &table_buffer);
     if (!table_flattener.Consume(context_, table)) {
       return false;
     }

     io::BigBufferInputStream table_buffer_in(&table_buffer);
     return io::CopyInputStreamToArchive(context_, &table_buffer_in, "resources.arsc",
                                         ArchiveEntry::kAlign, writer);
   }

   bool WriteShortenedPathsMap(const std::map<std::string, std::string> &path_map,
                                const std::string &file_path) {
     std::stringstream ss;
     for (auto it = path_map.cbegin(); it != path_map.cend(); ++it) {
       ss << it->first << " -> " << it->second << "\n";
     }
     return WriteStringToFile(ss.str(), file_path);
   }

   OptimizeOptions options_;
   OptimizeContext* context_;
 };

 bool ExtractConfig(const std::string& path, IAaptContext* context, OptimizeOptions* options) {
   std::string content;
   if (!android::base::ReadFileToString(path, &content, true /*follow_symlinks*/)) {
     context->GetDiagnostics()->Error(android::DiagMessage(path) << "failed reading config file");
     return false;
   }
   return ParseResourceConfig(content, context, options->resources_exclude_list,
                              options->table_flattener_options.name_collapse_exemptions);
 }

 bool ExtractAppDataFromManifest(OptimizeContext* context, const LoadedApk* apk,
                                 OptimizeOptions* out_options) {
   const xml::XmlResource* manifest = apk->GetManifest();
   if (manifest == nullptr) {
     return false;
   }

   auto app_info = ExtractAppInfoFromBinaryManifest(*manifest, context->GetDiagnostics());
   if (!app_info) {
     context->GetDiagnostics()->Error(android::DiagMessage()
                                      << "failed to extract data from AndroidManifest.xml");
     return false;
   }

   out_options->app_info = std::move(app_info.value());
   context->SetMinSdkVersion(out_options->app_info.min_sdk_version.value_or(0));
   return true;
 }

 int OptimizeCommand::Action(const std::vector<std::string>& args) {
   if (args.size() != 1u) {
     std::cerr << "must have one APK as argument.\n\n";
     Usage(&std::cerr);
     return 1;
   }

   const std::string& apk_path = args[0];
   OptimizeContext context;
   context.SetVerbose(verbose_);
   android::IDiagnostics* diag = context.GetDiagnostics();

   if (config_path_) {
     std::string& path = config_path_.value();
     std::optional<ConfigurationParser> for_path = ConfigurationParser::ForPath(path);
     if (for_path) {
       options_.apk_artifacts = for_path.value().WithDiagnostics(diag).Parse(apk_path);
       if (!options_.apk_artifacts) {
         diag->Error(android::DiagMessage() << "Failed to parse the output artifact list");
         return 1;
       }

     } else {
       diag->Error(android::DiagMessage() << "Could not parse config file " << path);
       return 1;
     }

     if (print_only_) {
       for (const OutputArtifact& artifact : options_.apk_artifacts.value()) {
         std::cout << artifact.name << std::endl;
       }
       return 0;
     }

     if (!kept_artifacts_.empty()) {
       for (const std::string& artifact_str : kept_artifacts_) {
         for (const StringPiece& artifact : util::Tokenize(artifact_str, ',')) {
           options_.kept_artifacts.insert(artifact.to_string());
         }
       }
     }

     // Since we know that we are going to process the APK (not just print targets), make sure we
     // have somewhere to write them to.
     if (!options_.output_dir) {
       diag->Error(android::DiagMessage()
                   << "Output directory is required when using a configuration file");
       return 1;
     }
   } else if (print_only_) {
     diag->Error(android::DiagMessage()
                 << "Asked to print artifacts without providing a configurations");
     return 1;
   }

   std::unique_ptr<LoadedApk> apk = LoadedApk::LoadApkFromPath(apk_path, context.GetDiagnostics());
   if (!apk) {
     return 1;
   }

   if (options_.enable_sparse_encoding) {
     options_.table_flattener_options.sparse_entries = SparseEntriesMode::Enabled;
   }
   if (options_.force_sparse_encoding) {
     options_.table_flattener_options.sparse_entries = SparseEntriesMode::Forced;
   }

   if (target_densities_) {
     // Parse the target screen densities.
     for (const StringPiece& config_str : util::Tokenize(target_densities_.value(), ',')) {
       std::optional<uint16_t> target_density = ParseTargetDensityParameter(config_str, diag);
       if (!target_density) {
         return 1;
       }
       options_.table_splitter_options.preferred_densities.push_back(target_density.value());
     }
   }

   std::unique_ptr<IConfigFilter> filter;
   if (!configs_.empty()) {
     filter = ParseConfigFilterParameters(configs_, diag);
     if (filter == nullptr) {
       return 1;
     }
     options_.table_splitter_options.config_filter = filter.get();
   }

   // Parse the split parameters.
   for (const std::string& split_arg : split_args_) {
     options_.split_paths.emplace_back();
     options_.split_constraints.emplace_back();
     if (!ParseSplitParameter(split_arg, diag, &options_.split_paths.back(),
         &options_.split_constraints.back())) {
       return 1;
     }
   }

   if (resources_config_path_) {
     std::string& path = resources_config_path_.value();
     if (!ExtractConfig(path, &context, &options_)) {
       return 1;
     }
   }

   if (!ExtractAppDataFromManifest(&context, apk.get(), &options_)) {
     return 1;
   }

   Optimizer cmd(&context, options_);
   return cmd.Run(std::move(apk));
 }

 }  // namespace aapt
	/*
	* Copyright (C) 2017 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 "Optimize.h"

	#include <map>
	#include <memory>
	#include <set>
	#include <string>
	#include <utility>
	#include <vector>

	#include "Diagnostics.h"
	#include "LoadedApk.h"
	#include "ResourceUtils.h"
	#include "SdkConstants.h"
	#include "ValueVisitor.h"
	#include "android-base/file.h"
	#include "android-base/stringprintf.h"
	#include "androidfw/ConfigDescription.h"
	#include "androidfw/IDiagnostics.h"
	#include "androidfw/ResourceTypes.h"
	#include "androidfw/StringPiece.h"
	#include "cmd/Util.h"
	#include "configuration/ConfigurationParser.h"
	#include "filter/AbiFilter.h"
	#include "format/binary/TableFlattener.h"
	#include "format/binary/XmlFlattener.h"
	#include "io/BigBufferStream.h"
	#include "io/Util.h"
	#include "optimize/MultiApkGenerator.h"
	#include "optimize/Obfuscator.h"
	#include "optimize/ResourceDeduper.h"
	#include "optimize/ResourceFilter.h"
	#include "optimize/VersionCollapser.h"
	#include "split/TableSplitter.h"
	#include "util/Files.h"
	#include "util/Util.h"

	using ::aapt::configuration::Abi;
	using ::aapt::configuration::OutputArtifact;
	using ::android::ConfigDescription;
	using ::android::ResTable_config;
	using ::android::StringPiece;
	using ::android::base::ReadFileToString;
	using ::android::base::StringAppendF;
	using ::android::base::StringPrintf;
	using ::android::base::WriteStringToFile;

	namespace aapt {

	class OptimizeContext : public IAaptContext {
	public:
	OptimizeContext() = default;

	PackageType GetPackageType() override {
	// Not important here. Using anything other than kApp adds EXTRA validation, which we want to
	// avoid.
	return PackageType::kApp;
	}

	android::IDiagnostics* GetDiagnostics() override {
	return &diagnostics_;
	}

	NameMangler* GetNameMangler() override {
	UNIMPLEMENTED(FATAL);
	return nullptr;
	}

	const std::string& GetCompilationPackage() override {
	static std::string empty;
	return empty;
	}

	uint8_t GetPackageId() override {
	return 0;
	}

	SymbolTable* GetExternalSymbols() override {
	UNIMPLEMENTED(FATAL);
	return nullptr;
	}

	bool IsVerbose() override {
	return verbose_;
	}

	void SetVerbose(bool val) {
	verbose_ = val;
	}

	void SetMinSdkVersion(int sdk_version) {
	sdk_version_ = sdk_version;
	}

	int GetMinSdkVersion() override {
	return sdk_version_;
	}

	const std::set<std::string>& GetSplitNameDependencies() override {
	UNIMPLEMENTED(FATAL) << "Split Name Dependencies should not be necessary";
	static std::set<std::string> empty;
	return empty;
	}

	private:
	StdErrDiagnostics diagnostics_;
	bool verbose_ = false;
	int sdk_version_ = 0;

	DISALLOW_COPY_AND_ASSIGN(OptimizeContext);
	};

	class Optimizer {
	public:
	Optimizer(OptimizeContext* context, const OptimizeOptions& options)
	: options_(options), context_(context) {
	}

	int Run(std::unique_ptr<LoadedApk> apk) {
	if (context_->IsVerbose()) {
	context_->GetDiagnostics()->Note(android::DiagMessage() << "Optimizing APK...");
	}
	if (!options_.resources_exclude_list.empty()) {
	ResourceFilter filter(options_.resources_exclude_list);
	if (!filter.Consume(context_, apk->GetResourceTable())) {
	context_->GetDiagnostics()->Error(android::DiagMessage() << "failed filtering resources");
	return 1;
	}
	}

	VersionCollapser collapser;
	if (!collapser.Consume(context_, apk->GetResourceTable())) {
	return 1;
	}

	ResourceDeduper deduper;
	if (!deduper.Consume(context_, apk->GetResourceTable())) {
	context_->GetDiagnostics()->Error(android::DiagMessage() << "failed deduping resources");
	return 1;
	}

	if (options_.shorten_resource_paths) {
	Obfuscator obfuscator(options_.table_flattener_options.shortened_path_map);
	if (!obfuscator.Consume(context_, apk->GetResourceTable())) {
	context_->GetDiagnostics()->Error(android::DiagMessage()
	<< "failed shortening resource paths");
	return 1;
	}
	if (options_.shortened_paths_map_path
	&& !WriteShortenedPathsMap(options_.table_flattener_options.shortened_path_map,
	options_.shortened_paths_map_path.value())) {
	context_->GetDiagnostics()->Error(android::DiagMessage()
	<< "failed to write shortened resource paths to file");
	return 1;
	}
	}

	// Adjust the SplitConstraints so that their SDK version is stripped if it is less than or
	// equal to the minSdk.
	options_.split_constraints =
	AdjustSplitConstraintsForMinSdk(context_->GetMinSdkVersion(), options_.split_constraints);

	// Stripping the APK using the TableSplitter. The resource table is modified in place in the
	// LoadedApk.
	TableSplitter splitter(options_.split_constraints, options_.table_splitter_options);
	if (!splitter.VerifySplitConstraints(context_)) {
	return 1;
	}
	splitter.SplitTable(apk->GetResourceTable());

	auto path_iter = options_.split_paths.begin();
	auto split_constraints_iter = options_.split_constraints.begin();
	for (std::unique_ptr<ResourceTable>& split_table : splitter.splits()) {
	if (context_->IsVerbose()) {
	context_->GetDiagnostics()->Note(android::DiagMessage(*path_iter)
	<< "generating split with configurations '"
	<< util::Joiner(split_constraints_iter->configs, ", ")
	<< "'");
	}

	// Generate an AndroidManifest.xml for each split.
	std::unique_ptr<xml::XmlResource> split_manifest =
	GenerateSplitManifest(options_.app_info, *split_constraints_iter);
	std::unique_ptr<IArchiveWriter> split_writer =
	CreateZipFileArchiveWriter(context_->GetDiagnostics(), *path_iter);
	if (!split_writer) {
	return 1;
	}

	if (!WriteSplitApk(split_table.get(), split_manifest.get(), split_writer.get())) {
	return 1;
	}

	++path_iter;
	++split_constraints_iter;
	}

	if (options_.apk_artifacts && options_.output_dir) {
	MultiApkGenerator generator{apk.get(), context_};
	MultiApkGeneratorOptions generator_options = {
	options_.output_dir.value(), options_.apk_artifacts.value(),
	options_.table_flattener_options, options_.kept_artifacts};
	if (!generator.FromBaseApk(generator_options)) {
	return 1;
	}
	}

	if (options_.output_path) {
	std::unique_ptr<IArchiveWriter> writer =
	CreateZipFileArchiveWriter(context_->GetDiagnostics(), options_.output_path.value());
	if (!apk->WriteToArchive(context_, options_.table_flattener_options, writer.get())) {
	return 1;
	}
	}

	return 0;
	}

	private:
	bool WriteSplitApk(ResourceTable* table, xml::XmlResource* manifest, IArchiveWriter* writer) {
	android::BigBuffer manifest_buffer(4096);
	XmlFlattener xml_flattener(&manifest_buffer, {});
	if (!xml_flattener.Consume(context_, manifest)) {
	return false;
	}

	io::BigBufferInputStream manifest_buffer_in(&manifest_buffer);
	if (!io::CopyInputStreamToArchive(context_, &manifest_buffer_in, "AndroidManifest.xml",
	ArchiveEntry::kCompress, writer)) {
	return false;
	}

	std::map<std::pair<ConfigDescription, StringPiece>, FileReference*> config_sorted_files;
	for (auto& pkg : table->packages) {
	for (auto& type : pkg->types) {
	// Sort by config and name, so that we get better locality in the zip file.
	config_sorted_files.clear();

	for (auto& entry : type->entries) {
	for (auto& config_value : entry->values) {
	auto* file_ref = ValueCast<FileReference>(config_value->value.get());
	if (file_ref == nullptr) {
	continue;
	}

	if (file_ref->file == nullptr) {
	ResourceNameRef name(pkg->name, type->named_type, entry->name);
	context_->GetDiagnostics()->Warn(android::DiagMessage(file_ref->GetSource())
	<< "file for resource " << name << " with config '"
	<< config_value->config << "' not found");
	continue;
	}

	const StringPiece entry_name = entry->name;
	config_sorted_files[std::make_pair(config_value->config, entry_name)] = file_ref;
	}
	}

	for (auto& entry : config_sorted_files) {
	FileReference* file_ref = entry.second;
	if (!io::CopyFileToArchivePreserveCompression(context_, file_ref->file, *file_ref->path,
	writer)) {
	return false;
	}
	}
	}
	}

	android::BigBuffer table_buffer(4096);
	TableFlattener table_flattener(options_.table_flattener_options, &table_buffer);
	if (!table_flattener.Consume(context_, table)) {
	return false;
	}

	io::BigBufferInputStream table_buffer_in(&table_buffer);
	return io::CopyInputStreamToArchive(context_, &table_buffer_in, "resources.arsc",
	ArchiveEntry::kAlign, writer);
	}

	bool WriteShortenedPathsMap(const std::map<std::string, std::string> &path_map,
	const std::string &file_path) {
	std::stringstream ss;
	for (auto it = path_map.cbegin(); it != path_map.cend(); ++it) {
	ss << it->first << " -> " << it->second << "\n";
	}
	return WriteStringToFile(ss.str(), file_path);
	}

	OptimizeOptions options_;
	OptimizeContext* context_;
	};

	bool ExtractConfig(const std::string& path, IAaptContext* context, OptimizeOptions* options) {
	std::string content;
	if (!android::base::ReadFileToString(path, &content, true /follow_symlinks/)) {
	context->GetDiagnostics()->Error(android::DiagMessage(path) << "failed reading config file");
	return false;
	}
	return ParseResourceConfig(content, context, options->resources_exclude_list,
	options->table_flattener_options.name_collapse_exemptions);
	}

	bool ExtractAppDataFromManifest(OptimizeContext* context, const LoadedApk* apk,
	OptimizeOptions* out_options) {
	const xml::XmlResource* manifest = apk->GetManifest();
	if (manifest == nullptr) {
	return false;
	}

	auto app_info = ExtractAppInfoFromBinaryManifest(*manifest, context->GetDiagnostics());
	if (!app_info) {
	context->GetDiagnostics()->Error(android::DiagMessage()
	<< "failed to extract data from AndroidManifest.xml");
	return false;
	}

	out_options->app_info = std::move(app_info.value());
	context->SetMinSdkVersion(out_options->app_info.min_sdk_version.value_or(0));
	return true;
	}

	int OptimizeCommand::Action(const std::vector<std::string>& args) {
	if (args.size() != 1u) {
	std::cerr << "must have one APK as argument.\n\n";
	Usage(&std::cerr);
	return 1;
	}

	const std::string& apk_path = args[0];
	OptimizeContext context;
	context.SetVerbose(verbose_);
	android::IDiagnostics* diag = context.GetDiagnostics();

	if (config_path_) {
	std::string& path = config_path_.value();
	std::optional<ConfigurationParser> for_path = ConfigurationParser::ForPath(path);
	if (for_path) {
	options_.apk_artifacts = for_path.value().WithDiagnostics(diag).Parse(apk_path);
	if (!options_.apk_artifacts) {
	diag->Error(android::DiagMessage() << "Failed to parse the output artifact list");
	return 1;
	}

	} else {
	diag->Error(android::DiagMessage() << "Could not parse config file " << path);
	return 1;
	}

	if (print_only_) {
	for (const OutputArtifact& artifact : options_.apk_artifacts.value()) {
	std::cout << artifact.name << std::endl;
	}
	return 0;
	}

	if (!kept_artifacts_.empty()) {
	for (const std::string& artifact_str : kept_artifacts_) {
	for (const StringPiece& artifact : util::Tokenize(artifact_str, ',')) {
	options_.kept_artifacts.insert(artifact.to_string());
	}
	}
	}

	// Since we know that we are going to process the APK (not just print targets), make sure we
	// have somewhere to write them to.
	if (!options_.output_dir) {
	diag->Error(android::DiagMessage()
	<< "Output directory is required when using a configuration file");
	return 1;
	}
	} else if (print_only_) {
	diag->Error(android::DiagMessage()
	<< "Asked to print artifacts without providing a configurations");
	return 1;
	}

	std::unique_ptr<LoadedApk> apk = LoadedApk::LoadApkFromPath(apk_path, context.GetDiagnostics());
	if (!apk) {
	return 1;
	}

	if (options_.enable_sparse_encoding) {
	options_.table_flattener_options.sparse_entries = SparseEntriesMode::Enabled;
	}
	if (options_.force_sparse_encoding) {
	options_.table_flattener_options.sparse_entries = SparseEntriesMode::Forced;
	}

	if (target_densities_) {
	// Parse the target screen densities.
	for (const StringPiece& config_str : util::Tokenize(target_densities_.value(), ',')) {
	std::optional<uint16_t> target_density = ParseTargetDensityParameter(config_str, diag);
	if (!target_density) {
	return 1;
	}
	options_.table_splitter_options.preferred_densities.push_back(target_density.value());
	}
	}

	std::unique_ptr<IConfigFilter> filter;
	if (!configs_.empty()) {
	filter = ParseConfigFilterParameters(configs_, diag);
	if (filter == nullptr) {
	return 1;
	}
	options_.table_splitter_options.config_filter = filter.get();
	}

	// Parse the split parameters.
	for (const std::string& split_arg : split_args_) {
	options_.split_paths.emplace_back();
	options_.split_constraints.emplace_back();
	if (!ParseSplitParameter(split_arg, diag, &options_.split_paths.back(),
	&options_.split_constraints.back())) {
	return 1;
	}
	}

	if (resources_config_path_) {
	std::string& path = resources_config_path_.value();
	if (!ExtractConfig(path, &context, &options_)) {
	return 1;
	}
	}

	if (!ExtractAppDataFromManifest(&context, apk.get(), &options_)) {
	return 1;
	}

	Optimizer cmd(&context, options_);
	return cmd.Run(std::move(apk));
	}

	} // namespace aapt