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// Copyright 2015 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.lib.rules.android;
import static com.google.devtools.build.lib.packages.Attribute.attr;
import static com.google.devtools.build.lib.packages.BuildType.LABEL;
import static com.google.devtools.build.lib.packages.BuildType.LABEL_LIST;
import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.ConfiguredAspect;
import com.google.devtools.build.lib.analysis.ConfiguredAspectFactory;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.cmdline.LabelSyntaxException;
import com.google.devtools.build.lib.packages.AspectDefinition;
import com.google.devtools.build.lib.packages.AspectParameters;
import com.google.devtools.build.lib.packages.NativeAspectClass;
import com.google.devtools.build.lib.rules.android.AndroidRuleClasses.AndroidSdkLabel;
import com.google.devtools.build.lib.rules.java.JavaCommon;
import com.google.devtools.build.lib.rules.java.JavaSourceInfoProvider;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.List;
/** Aspect to provide Jack support to rules which have java sources. */
public final class JackAspect extends NativeAspectClass implements ConfiguredAspectFactory {
public static final String NAME = "JackAspect";
private final String toolsRepository;
/**
* Creates a JackAspect using the provided tools repository path.
*
* @param toolsRepository the path to the tools repository
*/
public JackAspect(String toolsRepository) {
this.toolsRepository = toolsRepository;
}
@Override
public AspectDefinition getDefinition(AspectParameters params) {
Label androidSdk;
try {
androidSdk = Label.parseAbsolute(toolsRepository + AndroidRuleClasses.DEFAULT_SDK);
} catch (LabelSyntaxException e) {
throw new IllegalStateException(e);
}
return new AspectDefinition.Builder(this)
.requireProviders(JavaSourceInfoProvider.class)
.add(attr(":android_sdk", LABEL)
.allowedRuleClasses("android_sdk")
.value(new AndroidSdkLabel(androidSdk)))
.attributeAspect("deps", this)
.attributeAspect("exports", this)
.attributeAspect("runtime_deps", this)
.requiresConfigurationFragments(AndroidConfiguration.class)
.build();
}
@Override
public ConfiguredAspect create(
ConfiguredTarget base, RuleContext ruleContext, AspectParameters params) {
if (base.getProvider(JackLibraryProvider.class) != null) {
return new ConfiguredAspect.Builder(this, params, ruleContext).build();
}
JavaSourceInfoProvider sourceProvider = base.getProvider(JavaSourceInfoProvider.class);
PathFragment rulePath = ruleContext.getLabel().toPathFragment();
PathFragment jackLibraryPath = rulePath.replaceName("lib" + rulePath.getBaseName() + ".jack");
Artifact jackLibraryOutput =
ruleContext
.getAnalysisEnvironment()
.getDerivedArtifact(jackLibraryPath, ruleContext.getBinOrGenfilesDirectory());
if (!AndroidSdkProvider.verifyPresence(ruleContext)) {
return null;
}
AndroidSdkProvider androidSdk = AndroidSdkProvider.fromRuleContext(ruleContext);
JackCompilationHelper jackHelper =
new JackCompilationHelper.Builder()
// blaze infrastructure
.setRuleContext(ruleContext)
// configuration
.setOutputArtifact(jackLibraryOutput)
// tools
.setJackBinary(androidSdk.getJack())
.setJillBinary(androidSdk.getJill())
.setResourceExtractorBinary(androidSdk.getResourceExtractor())
.setJackBaseClasspath(androidSdk.getJavaBaseClasspathForJack())
// sources
.addJavaSources(sourceProvider.getSourceFiles())
.addSourceJars(sourceProvider.getSourceJars())
.addCompiledJars(sourceProvider.getJarFiles())
.addResources(sourceProvider.getResources())
.addProcessorNames(sourceProvider.getProcessorNames())
.addProcessorClasspathJars(sourceProvider.getProcessorPath())
// dependencies
.addExports(getPotentialDependency(ruleContext, "exports"))
.addDeps(getPotentialDependency(ruleContext, "deps"))
.addRuntimeDeps(getPotentialDependency(ruleContext, "runtime_deps"))
.build();
JackLibraryProvider result =
JavaCommon.isNeverLink(ruleContext)
? jackHelper.compileAsNeverlinkLibrary()
: jackHelper.compileAsLibrary();
return new ConfiguredAspect.Builder(this, params, ruleContext).addProvider(result).build();
}
/** Gets a list of targets on the given LABEL_LIST attribute if it exists, else an empty list. */
private static List<? extends TransitiveInfoCollection> getPotentialDependency(
RuleContext context, String attribute) {
if (!context.getRule().getRuleClassObject().hasAttr(attribute, LABEL_LIST)) {
return ImmutableList.of();
}
return context.getPrerequisites(attribute, Mode.TARGET);
}
}
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