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/*
* 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 <memory>
#include <vector>
#include "androidfw/StringPiece.h"
#include "Diagnostics.h"
#include "Flags.h"
#include "LoadedApk.h"
#include "SdkConstants.h"
#include "flatten/TableFlattener.h"
#include "optimize/ResourceDeduper.h"
#include "optimize/VersionCollapser.h"
#include "split/TableSplitter.h"
using android::StringPiece;
namespace aapt {
struct OptimizeOptions {
// Path to the output APK.
std::string output_path;
// List of screen density configurations the APK will be optimized for.
std::vector<ConfigDescription> target_configs;
TableFlattenerOptions table_flattener_options;
};
class OptimizeContext : public IAaptContext {
public:
IDiagnostics* GetDiagnostics() override { return &diagnostics_; }
NameMangler* GetNameMangler() override {
abort();
return nullptr;
}
const std::string& GetCompilationPackage() override {
static std::string empty;
return empty;
}
uint8_t GetPackageId() override { return 0; }
SymbolTable* GetExternalSymbols() override {
abort();
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_; }
private:
StdErrDiagnostics diagnostics_;
bool verbose_ = false;
int sdk_version_ = 0;
};
class OptimizeCommand {
public:
OptimizeCommand(OptimizeContext* context, const OptimizeOptions& options)
: options_(options),
context_(context) {}
int Run(std::unique_ptr<LoadedApk> apk) {
if (context_->IsVerbose()) {
context_->GetDiagnostics()->Note(DiagMessage() << "Optimizing APK...");
}
VersionCollapser collapser;
if (!collapser.Consume(context_, apk->GetResourceTable())) {
return 1;
}
ResourceDeduper deduper;
if (!deduper.Consume(context_, apk->GetResourceTable())) {
context_->GetDiagnostics()->Error(DiagMessage() << "failed deduping resources");
return 1;
}
// Stripping the APK using the TableSplitter with no splits and the target
// densities as the preferred densities. The resource table is modified in
// place in the LoadedApk.
TableSplitterOptions splitter_options;
for (auto& config : options_.target_configs) {
splitter_options.preferred_densities.push_back(config.density);
}
std::vector<SplitConstraints> splits;
TableSplitter splitter(splits, splitter_options);
splitter.SplitTable(apk->GetResourceTable());
std::unique_ptr<IArchiveWriter> writer =
CreateZipFileArchiveWriter(context_->GetDiagnostics(), options_.output_path);
if (!apk->WriteToArchive(context_, options_.table_flattener_options, writer.get())) {
return 1;
}
return 0;
}
private:
OptimizeOptions options_;
OptimizeContext* context_;
};
int Optimize(const std::vector<StringPiece>& args) {
OptimizeContext context;
OptimizeOptions options;
Maybe<std::string> target_densities;
bool verbose = false;
Flags flags =
Flags()
.RequiredFlag("-o", "Path to the output APK.", &options.output_path)
.OptionalFlag(
"--target-densities",
"Comma separated list of the screen densities that the APK will "
"be optimized for. All the resources that would be unused on "
"devices of the given densities will be removed from the APK.",
&target_densities)
.OptionalSwitch("--enable-sparse-encoding",
"Enables encoding sparse entries using a binary search tree.\n"
"This decreases APK size at the cost of resource retrieval performance.",
&options.table_flattener_options.use_sparse_entries)
.OptionalSwitch("-v", "Enables verbose logging", &verbose);
if (!flags.Parse("aapt2 optimize", args, &std::cerr)) {
return 1;
}
if (flags.GetArgs().size() != 1u) {
std::cerr << "must have one APK as argument.\n\n";
flags.Usage("aapt2 optimize", &std::cerr);
return 1;
}
std::unique_ptr<LoadedApk> apk =
LoadedApk::LoadApkFromPath(&context, flags.GetArgs()[0]);
if (!apk) {
return 1;
}
if (verbose) {
context.SetVerbose(verbose);
}
if (target_densities) {
// Parse the target screen densities.
for (const StringPiece& config_str : util::Tokenize(target_densities.value(), ',')) {
ConfigDescription config;
if (!ConfigDescription::Parse(config_str, &config) || config.density == 0) {
context.GetDiagnostics()->Error(
DiagMessage() << "invalid density '" << config_str
<< "' for --target-densities option");
return 1;
}
// Clear the version that can be automatically added.
config.sdkVersion = 0;
if (config.diff(ConfigDescription::DefaultConfig()) !=
ConfigDescription::CONFIG_DENSITY) {
context.GetDiagnostics()->Error(
DiagMessage() << "invalid density '" << config_str
<< "' for --target-densities option. Must be only a "
<< "density value.");
return 1;
}
options.target_configs.push_back(config);
}
}
// TODO(adamlesinski): Read manfiest and set the proper minSdkVersion.
// context.SetMinSdkVersion(SDK_O);
OptimizeCommand cmd(&context, options);
return cmd.Run(std::move(apk));
}
} // namespace aapt
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