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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.ResourcesZip.ShrunkProtoApk;
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.Option;
import com.google.devtools.common.options.OptionDocumentationCategory;
import com.google.devtools.common.options.OptionEffectTag;
import com.google.devtools.common.options.OptionsBase;
import com.google.devtools.common.options.OptionsParser;
import com.google.devtools.common.options.ShellQuotedParamsFilePreProcessor;
import java.io.File;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Set;
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
* --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 {
/** Aapt2 shrinking specific options */
public static final class Aapt2ShrinkOptions extends OptionsBase {
@Option(
name = "useProtoApk",
defaultValue = "false",
category = "config",
documentationCategory = OptionDocumentationCategory.UNCATEGORIZED,
effectTags = {OptionEffectTag.UNKNOWN},
help = "Path to the shrunk jar from a Proguard run with shrinking enabled.")
public boolean useProtoApk;
}
public static void main(String[] args) throws Exception {
final Profiler profiler = LoggingProfiler.createAndStart("shrink").startTask("flags");
// Parse arguments.
OptionsParser optionsParser =
OptionsParser.newOptionsParser(
ImmutableList.of(Options.class, Aapt2ConfigOptions.class, Aapt2ShrinkOptions.class));
optionsParser.enableParamsFileSupport(
new ShellQuotedParamsFilePreProcessor(FileSystems.getDefault()));
optionsParser.parseAndExitUponError(args);
Aapt2ConfigOptions aapt2ConfigOptions = optionsParser.getOptions(Aapt2ConfigOptions.class);
Options options = optionsParser.getOptions(Options.class);
Aapt2ShrinkOptions aapt2ShrinkOptions = optionsParser.getOptions(Aapt2ShrinkOptions.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"));
Path workingResourcesDirectory = scopedTmp.subDirectoryOf("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 =
options
.dependencyManifests
.stream()
.map(Path::toFile)
.map(manifestToPackageUsing(executorService))
.map(futureToString())
.collect(toSet());
if (aapt2ShrinkOptions.useProtoApk) {
try (final ShrunkProtoApk shrunk =
resourcesZip.shrinkUsingProto(
packages,
options.shrunkJar,
options.proguardMapping,
options.log,
scopedTmp.subDirectoryOf("shrunk-resources"))) {
shrunk
.writeBinaryTo(linker, options.shrunkApk, aapt2ConfigOptions.resourceTableAsProto)
.writeReportTo(options.log)
.writeResourcesToZip(options.shrunkResources);
if (options.rTxtOutput != null) {
// Fufill the contract -- however, we do not generate an R.txt from the shrunk
// resources.
Files.copy(options.rTxt, options.rTxtOutput);
}
}
} else {
final ResourceCompiler resourceCompiler =
ResourceCompiler.create(
executorService,
workingResourcesDirectory,
aapt2ConfigOptions.aapt2,
aapt2ConfigOptions.buildToolsVersion,
aapt2ConfigOptions.generatePseudoLocale);
profiler.recordEndOf("setup").startTask("compile");
final CompiledResources compiled =
resourcesZip
.shrink(
packages,
options.rTxt,
options.shrunkJar,
options.primaryManifest,
options.proguardMapping,
options.log,
scopedTmp.subDirectoryOf("shrunk-resources"))
.writeArchiveTo(options.shrunkResources, false)
.compile(resourceCompiler, workingResourcesDirectory);
profiler.recordEndOf("compile");
linker
.dependencies(ImmutableList.of(StaticLibrary.from(aapt2ConfigOptions.androidJar)))
.profileUsing(profiler)
.outputAsProto(aapt2ConfigOptions.resourceTableAsProto)
.buildVersion(aapt2ConfigOptions.buildToolsVersion)
.includeOnlyConfigs(aapt2ConfigOptions.resourceConfigs)
.debug(aapt2ConfigOptions.debug)
.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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