blob: 1033c065a8e7c199b7608915135f3f295bbaa039 [file] [log] [blame]
// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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.
package com.google.devtools.build.android;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.android.ResourceShrinkerAction.Options;
import com.google.devtools.build.android.ResourcesZip.ShrunkProtoApk;
import com.google.devtools.build.android.aapt2.Aapt2ConfigOptions;
import com.google.devtools.build.android.aapt2.ResourceLinker;
import com.google.devtools.build.android.aapt2.StaticLibrary;
import com.google.devtools.common.options.OptionsParser;
import com.google.devtools.common.options.ShellQuotedParamsFilePreProcessor;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.util.LinkedHashSet;
import java.util.Set;
/**
* An action that will analyze and remove unused resources from a ResourcesZip.
*
* <pre>
* Example Usage:
* java/com/google/build/android/Aapt2ResourceShrinkingAction
* --aapt2 path to sdk/aapt2
* --androidJar path to sdk/androidJar
* --shrunkJar path to proguard dead code removal jar
* --resources path to processed resources zip
* --rTxt path to processed resources R.txt
* --shrunkResourceApk path to write shrunk ap_
* --shrunkResources path to write shrunk resources zip
* </pre>
*/
public class Aapt2ResourceShrinkingAction {
public static void main(String[] args) throws Exception {
final Profiler profiler = LoggingProfiler.createAndStart("shrink").startTask("flags");
// Parse arguments.
OptionsParser optionsParser =
OptionsParser.builder()
.optionsClasses(
Options.class, Aapt2ConfigOptions.class, ResourceProcessorCommonOptions.class)
.argsPreProcessor(new ShellQuotedParamsFilePreProcessor(FileSystems.getDefault()))
.build();
optionsParser.parseAndExitUponError(args);
Aapt2ConfigOptions aapt2ConfigOptions = optionsParser.getOptions(Aapt2ConfigOptions.class);
Options options = optionsParser.getOptions(Options.class);
profiler.recordEndOf("flags").startTask("setup");
try (ScopedTemporaryDirectory scopedTmp =
new ScopedTemporaryDirectory("android_resources_tmp");
ExecutorServiceCloser executorService = ExecutorServiceCloser.createWithFixedPoolOf(15)) {
final ResourcesZip resourcesZip =
ResourcesZip.createFrom(
options.resourcesZip, scopedTmp.subDirectoryOf("merged-resources"));
final ResourceLinker linker =
ResourceLinker.create(
aapt2ConfigOptions.aapt2, executorService, scopedTmp.subDirectoryOf("linking"))
.profileUsing(profiler)
.dependencies(ImmutableList.of(StaticLibrary.from(aapt2ConfigOptions.androidJar)));
final Set<String> packages = new LinkedHashSet<>(resourcesZip.asPackages());
profiler.recordEndOf("setup").startTask("resourceShrinker");
try (final ShrunkProtoApk shrunk =
resourcesZip.shrinkUsingProto(
packages,
options.shrunkJar,
options.rTxt,
options.proguardMapping,
options.log,
scopedTmp.subDirectoryOf("shrunk-resources"))) {
shrunk
.writeBinaryTo(linker, options.shrunkApk, aapt2ConfigOptions.resourceTableAsProto)
.writeReportTo(options.log)
.writeResourcesToZip(options.shrunkResources);
if (options.resourcesConfigOutput != null) {
shrunk.writeResourcesConfigTo(options.resourcesConfigOutput);
}
if (options.rTxtOutput != null) {
// Fulfill the contract -- however, we do not generate an R.txt from the shrunk
// resources.
Files.copy(options.rTxt, options.rTxtOutput);
}
}
profiler.recordEndOf("resourceShrinker").recordEndOf("shrink");
}
}
}