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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.aapt2;
import com.android.builder.core.VariantType;
import com.android.repository.Revision;
import com.google.common.base.Joiner;
import com.google.common.base.MoreObjects;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import com.google.common.io.ByteStreams;
import com.google.devtools.build.android.AaptCommandBuilder;
import com.google.devtools.build.android.AndroidResourceOutputs;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import java.util.zip.ZipFile;
/** Performs linking of {@link CompiledResources} using aapt2. */
public class ResourceLinker {
/** Represents errors thrown during linking. */
public static class LinkError extends RuntimeException {
public LinkError(Throwable e) {
super(e);
}
}
private static Logger logger = Logger.getLogger(ResourceLinker.class.getName());
private final Path aapt2;
private final Path workingDirectory;
private List<StaticLibrary> linkAgainst = ImmutableList.of();
private Revision buildToolsVersion;
private String density;
private Path androidJar;
private List<String> uncompressedExtensions = ImmutableList.of();
private List<String> resourceConfigs = ImmutableList.of();
private Path baseApk;
private List<StaticLibrary> include;
private ResourceLinker(Path aapt2, Path workingDirectory) {
this.aapt2 = aapt2;
this.workingDirectory = workingDirectory;
}
public static ResourceLinker create(Path aapt2, Path workingDirectory) {
return new ResourceLinker(aapt2, workingDirectory);
}
/** Dependent static libraries to be linked to. */
public ResourceLinker dependencies(List<StaticLibrary> libraries) {
this.linkAgainst = libraries;
return this;
}
/** Dependent static libraries to be included in the binary. */
public ResourceLinker include(List<StaticLibrary> include) {
this.include = include;
return this;
}
public ResourceLinker buildVersion(Revision buildToolsVersion) {
this.buildToolsVersion = buildToolsVersion;
return this;
}
public ResourceLinker baseApkToLinkAgainst(Path baseApk) {
this.baseApk = baseApk;
return this;
}
public ResourceLinker filterToDensity(List<String> densitiesToFilter) {
if (densitiesToFilter.size() > 1) {
logger.warning("Multiple densities not yet supported with aapt2");
} else if (densitiesToFilter.size() > 0) {
density = Iterables.getOnlyElement(densitiesToFilter);
}
return this;
}
/**
* Statically links the {@link CompiledResources} with the dependencies to produce a {@link
* StaticLibrary}.
*
* @throws IOException
*/
public StaticLibrary linkStatically(CompiledResources resources) {
final Path outPath = workingDirectory.resolve("lib.ap_");
final Path rTxt = workingDirectory.resolve("R.txt");
final Path sourceJar = workingDirectory.resolve("r.srcjar");
Path javaSourceDirectory = workingDirectory.resolve("java");
try {
logger.fine(
new AaptCommandBuilder(aapt2)
.forBuildToolsVersion(buildToolsVersion)
.forVariantType(VariantType.LIBRARY)
.add("link")
.add("--manifest", resources.getManifest())
.add("--static-lib")
.add("--no-static-lib-packages")
.whenVersionIsAtLeast(new Revision(23))
.thenAdd("--no-version-vectors")
.addRepeated("-R", unzipCompiledResources(resources.getZip()))
.addRepeated("-I", StaticLibrary.toPathStrings(linkAgainst))
.add("--java", javaSourceDirectory)
.add("--auto-add-overlay")
.add("-o", outPath)
.add("--java", javaSourceDirectory)
.add("--output-text-symbols", rTxt)
.execute(String.format("Statically linking %s", resources)));
AndroidResourceOutputs.createSrcJar(javaSourceDirectory, sourceJar, true /* staticIds */);
return StaticLibrary.from(outPath, rTxt, ImmutableList.of(), sourceJar);
} catch (IOException e) {
throw new LinkError(e);
}
}
public PackagedResources link(CompiledResources compiled) {
final Path outPath = workingDirectory.resolve("bin.ap_");
Path rTxt = workingDirectory.resolve("R.txt");
Path proguardConfig = workingDirectory.resolve("proguard.cfg");
Path mainDexProguard = workingDirectory.resolve("proguard.maindex.cfg");
Path javaSourceDirectory = workingDirectory.resolve("java");
try {
logger.fine(
new AaptCommandBuilder(aapt2)
.forBuildToolsVersion(buildToolsVersion)
.forVariantType(VariantType.DEFAULT)
.add("link")
.whenVersionIsAtLeast(new Revision(23))
.thenAdd("--no-version-vectors")
.add("--no-static-lib-packages")
.when(logger.getLevel() == Level.FINE)
.thenAdd("-v")
.add("--manifest", compiled.getManifest())
.add("--auto-add-overlay")
.addRepeated("-A", compiled.getAssetsStrings())
.addRepeated("-I", StaticLibrary.toPathStrings(linkAgainst))
.addRepeated("-R", StaticLibrary.toPathStrings(include))
.addParameterableRepeated(
"-R", unzipCompiledResources(compiled.getZip()), workingDirectory)
// Never compress apks.
.add("-0", "apk")
// Add custom no-compress extensions.
.addRepeated("-0", uncompressedExtensions)
.addRepeated("-A", StaticLibrary.toAssetPaths(include))
.when(density != null)
.thenAdd("--preferred-density", density)
// Filter by resource configuration type.
.when(!resourceConfigs.isEmpty())
.thenAdd("-c", Joiner.on(',').join(resourceConfigs))
.add("--output-text-symbols", rTxt)
.add("--java", javaSourceDirectory)
.add("--proguard", proguardConfig)
.add("--proguard-main-dex", mainDexProguard)
.add("-o", outPath)
.execute(String.format("Linking %s", compiled.getManifest())));
return PackagedResources.of(
outPath, rTxt, proguardConfig, mainDexProguard, javaSourceDirectory);
} catch (IOException e) {
throw new LinkError(e);
}
}
private List<String> unzipCompiledResources(Path resourceZip) throws IOException {
final ZipFile zipFile = new ZipFile(resourceZip.toFile());
return zipFile
.stream()
.map(
entry -> {
final Path resolve = workingDirectory.resolve(entry.getName());
try {
Files.createDirectories(resolve.getParent());
return Files.write(resolve, ByteStreams.toByteArray(zipFile.getInputStream(entry)));
} catch (IOException e) {
throw new RuntimeException(e);
}
})
.map(Path::toString)
.collect(Collectors.toList());
}
public ResourceLinker storeUncompressed(List<String> uncompressedExtensions) {
this.uncompressedExtensions = uncompressedExtensions;
return this;
}
public ResourceLinker includeOnlyConfigs(List<String> resourceConfigs) {
this.resourceConfigs = resourceConfigs;
return this;
}
public ResourceLinker using(Path androidJar) {
this.androidJar = androidJar;
return this;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(this)
.add("aapt2", aapt2)
.add("linkAgainst", linkAgainst)
.add("buildToolsVersion", buildToolsVersion)
.add("workingDirectory", workingDirectory)
.add("density", density)
.add("androidJar", androidJar)
.add("uncompressedExtensions", uncompressedExtensions)
.add("resourceConfigs", resourceConfigs)
.add("baseApk", baseApk)
.toString();
}
}
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