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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.lib.rules.java.proto;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.Iterables.getOnlyElement;
import static com.google.common.collect.Iterables.isEmpty;
import static com.google.common.collect.Iterables.transform;
import static com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode.TARGET;
import static com.google.devtools.build.lib.rules.java.JavaCompilationArgs.ClasspathType.BOTH;
import static com.google.devtools.build.lib.rules.java.proto.JavaProtoLibraryTransitiveFilesToBuildProvider.GET_JARS;
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.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.collect.nestedset.Order;
import com.google.devtools.build.lib.rules.java.JavaCompilationArgs;
import com.google.devtools.build.lib.rules.java.JavaCompilationArgsProvider;
import com.google.devtools.build.lib.rules.java.JavaCompilationArtifacts;
import com.google.devtools.build.lib.rules.java.JavaRuleOutputJarsProvider;
import com.google.devtools.build.lib.rules.java.JavaSkylarkApiProvider;
import com.google.devtools.build.lib.rules.java.JavaSourceJarsProvider;
import com.google.devtools.build.lib.rules.java.ProtoJavaApiInfoProvider;
public class ActionReuser {
/**
* If the underlying proto_library rule already registers the compile actions we need, just reuse
* them. This will preserve memory.
*
* <p>TODO(b/36191931): Delete when it's time.
*/
public static boolean reuseExistingActions(
ConfiguredTarget base, RuleContext ruleContext, ConfiguredAspect.Builder aspect) {
ProtoJavaApiInfoProvider javaApi = base.getProvider(ProtoJavaApiInfoProvider.class);
if (javaApi == null) {
return false;
}
JavaCompilationArtifacts directJars = javaApi.getJavaCompilationArtifactsImmutable();
if (isEmpty(directJars.getCompileTimeJars()) || javaApi.sourceJarImmutable() == null) {
return false;
}
JavaCompilationArgs transitiveJars =
JavaCompilationArgs.builder()
.addTransitiveArgs(javaApi.getTransitiveJavaCompilationArgsImmutable(), BOTH)
.addTransitiveDependencies(javaApi.getProtoRuntimeImmutable(), true /* recursive */)
.merge(directJars)
.build();
Artifact outputJar = getOnlyElement(directJars.getRuntimeJars());
Artifact compileTimeJar = getOnlyElement(directJars.getCompileTimeJars());
Artifact sourceJar = checkNotNull(javaApi.sourceJarImmutable());
JavaCompilationArgsProvider compilationArgsProvider =
JavaCompilationArgsProvider.create(
JavaCompilationArgs.builder().merge(directJars).build(),
transitiveJars,
NestedSetBuilder.create(
Order.STABLE_ORDER, directJars.getCompileTimeDependencyArtifact()),
NestedSetBuilder.<Artifact>emptySet(Order.STABLE_ORDER));
JavaSkylarkApiProvider.Builder skylarkApiProvider =
JavaSkylarkApiProvider.builder()
.setRuleOutputJarsProvider(
createOutputJarProvider(outputJar, compileTimeJar, sourceJar))
.setSourceJarsProvider(createSrcJarProvider(sourceJar))
.setCompilationArgsProvider(compilationArgsProvider);
NestedSet<Artifact> transitiveOutputJars =
NestedSetBuilder.fromNestedSets(
transform(
ruleContext.getPrerequisites(
"deps", TARGET, JavaProtoLibraryTransitiveFilesToBuildProvider.class),
GET_JARS))
.add(outputJar)
.build();
aspect
.addSkylarkTransitiveInfo(
JavaSkylarkApiProvider.PROTO_NAME.getLegacyId(), skylarkApiProvider.build())
.addProviders(
new JavaProtoLibraryTransitiveFilesToBuildProvider(transitiveOutputJars),
new JavaCompilationArgsAspectProvider(compilationArgsProvider));
return true;
}
private static JavaRuleOutputJarsProvider createOutputJarProvider(
Artifact outputJar, Artifact compileTimeJar, Artifact sourceJar) {
return JavaRuleOutputJarsProvider.builder()
.addOutputJar(outputJar, compileTimeJar, ImmutableList.of(sourceJar))
.build();
}
private static JavaSourceJarsProvider createSrcJarProvider(Artifact sourceJar) {
return JavaSourceJarsProvider.create(
NestedSetBuilder.<Artifact>emptySet(Order.STABLE_ORDER),
NestedSetBuilder.<Artifact>stableOrder().add(sourceJar).build());
}
}
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