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// 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 static java.util.stream.Collectors.toSet;
import com.android.builder.core.VariantConfiguration;
import com.google.common.collect.ImmutableList;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.devtools.build.android.ResourceShrinkerAction.Options;
import com.google.devtools.build.android.aapt2.Aapt2ConfigOptions;
import com.google.devtools.build.android.aapt2.CompiledResources;
import com.google.devtools.build.android.aapt2.ResourceCompiler;
import com.google.devtools.build.android.aapt2.ResourceLinker;
import com.google.devtools.build.android.aapt2.StaticLibrary;
import com.google.devtools.common.options.OptionsParser;
import java.io.Closeable;
import java.io.File;
import java.nio.file.Path;
import java.util.concurrent.ExecutionException;
import java.util.function.Function;
/**
* An action to perform resource shrinking using the Gradle resource shrinker.
*
* <pre>
* Example Usage:
* java/com/google/build/android/ResourceShrinkerAction
* --aapt2 path to sdk/aapt2
* --annotationJar path to sdk/annotationJar
* --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
* --primaryManifest path to processed resources AndroidManifest.xml
* --dependencyManifest path to dependency library manifest (repeated flag)
* --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.newOptionsParser(Options.class, Aapt2ConfigOptions.class);
optionsParser.parseAndExitUponError(args);
Aapt2ConfigOptions aapt2ConfigOptions = optionsParser.getOptions(Aapt2ConfigOptions.class);
Options options = optionsParser.getOptions(Options.class);
options.dependencyManifests =
Converters.concatLists(options.dependencyManifests, options.deprecatedDependencyManifests);
profiler.recordEndOf("flags").startTask("setup");
final ListeningExecutorService executorService = ExecutorServiceCloser.createDefaultService();
try (ScopedTemporaryDirectory scopedTmp =
new ScopedTemporaryDirectory("android_resources_tmp");
Closeable closer = ExecutorServiceCloser.createWith(executorService)) {
Path workingResourcesDirectory = scopedTmp.subDirectoryOf("resources");
final ResourceCompiler resourceCompiler =
ResourceCompiler.create(
executorService,
workingResourcesDirectory,
aapt2ConfigOptions.aapt2,
aapt2ConfigOptions.buildToolsVersion);
profiler.recordEndOf("setup").startTask("compile");
final ResourcesZip resourcesZip =
ResourcesZip.createFrom(
options.resourcesZip, scopedTmp.subDirectoryOf("merged-resources"));
final CompiledResources compiled =
resourcesZip
.shrink(
options
.dependencyManifests
.stream()
.map(Path::toFile)
.map(manifestToPackageUsing(executorService))
.map(futureToString())
.collect(toSet()),
options.rTxt,
options.shrunkJar,
options.primaryManifest,
options.proguardMapping,
options.log,
scopedTmp.subDirectoryOf("shrunk-resources"))
.writeArchiveTo(options.shrunkResources, false)
.compile(resourceCompiler, workingResourcesDirectory);
profiler.recordEndOf("compile");
ResourceLinker.create(aapt2ConfigOptions.aapt2, scopedTmp.subDirectoryOf("linking"))
.profileUsing(profiler)
.dependencies(ImmutableList.of(StaticLibrary.from(aapt2ConfigOptions.androidJar)))
.link(compiled)
.copyPackageTo(options.shrunkApk)
.copyRTxtTo(options.rTxtOutput);
profiler.recordEndOf("shrink");
}
}
static Function<File, ListenableFuture<String>> manifestToPackageUsing(
ListeningExecutorService executor) {
return f -> executor.submit(() -> VariantConfiguration.getManifestPackage(f));
}
static Function<ListenableFuture<String>, String> futureToString() {
return f -> {
try {
return f.get();
} catch (InterruptedException | ExecutionException e) {
throw new RuntimeException(e);
}
};
}
}
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