Backbone of the new aapt2 strip command. (8a7b4cb9) · Commits · e / os / android_frameworks_base

tools/aapt2/Android.bp

+1 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ toolSources = [
		"diff/Diff.cpp",
		"dump/Dump.cpp",
		"link/Link.cpp",
		"strip/Strip.cpp",
		]

		cc_defaults {

tools/aapt2/Main.cpp

+4 −1

Original line number	Diff line number	Diff line
		@@ -37,6 +37,7 @@ extern int Compile(const std::vector<android::StringPiece>& args);
		extern int Link(const std::vector<android::StringPiece>& args);
		extern int Dump(const std::vector<android::StringPiece>& args);
		extern int Diff(const std::vector<android::StringPiece>& args);
		extern int Strip(const std::vector<android::StringPiece>& args);

		} // namespace aapt

		@@ -59,6 +60,8 @@ int main(int argc, char** argv) {
		return aapt::Dump(args);
		} else if (command == "diff") {
		return aapt::Diff(args);
		} else if (command == "strip") {
		return aapt::Strip(args);
		} else if (command == "version") {
		return aapt::PrintVersion();
		}
		@@ -67,7 +70,7 @@ int main(int argc, char** argv) {
		std::cerr << "no command specified\n";
		}

		std::cerr << "\nusage: aapt2 [compile\|link\|dump\|diff\|version] ..."
		std::cerr << "\nusage: aapt2 [compile\|link\|dump\|diff\|strip\|version] ..."
		<< std::endl;
		return 1;
		}

tools/aapt2/strip/Strip.cpp

0 → 100644

+156 −0

Original line number	Diff line number	Diff line
		/*
		* 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"

		using android::StringPiece;

		namespace aapt {

		struct StripOptions {
		/** 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;
		};

		class StripContext : 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; }

		int GetMinSdkVersion() override { return 0; }

		private:
		StdErrDiagnostics diagnostics_;
		bool verbose_ = false;
		};

		class StripCommand {
		public:
		StripCommand(StripContext* context, const StripOptions& options)
		: options_(options),
		context_(context) {}

		int Run(std::unique_ptr<LoadedApk> apk) {
		if (context_->IsVerbose()) {
		context_->GetDiagnostics()->Note(DiagMessage() << "Stripping APK...");
		}

		// TODO(lecesne): Implement stripping here.

		return 0;
		}

		private:
		StripOptions options_;
		StripContext* context_;
		};

		int Strip(const std::vector<StringPiece>& args) {
		StripContext context;
		StripOptions options;
		std::string target_densities;
		bool verbose = false;
		Flags flags =
		Flags()
		.RequiredFlag("-o", "Path to the output APK.", &options.output_path)
		.RequiredFlag(
		"--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("-v", "Enables verbose logging", &verbose);

		if (!flags.Parse("aapt2 strip", args, &std::cerr)) {
		return 1;
		}

		if (flags.GetArgs().size() != 1u) {
		std::cerr << "must have one APK as argument.\n\n";
		flags.Usage("aapt2 strip", &std::cerr);
		return 1;
		}

		std::unique_ptr<LoadedApk> apk =
		LoadedApk::LoadApkFromPath(&context, flags.GetArgs()[0]);
		if (!apk) {
		return 1;
		}

		if (verbose) {
		context.SetVerbose(verbose);
		}

		// Parse the target screen densities.
		for (const StringPiece& config_str : util::Tokenize(target_densities, ',')) {
		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);
		}

		StripCommand cmd(&context, options);
		return cmd.Run(std::move(apk));
		}

		} // namespace aapt